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Make bathroom breaks pleasant with great interior design

Bathrooms may not be the most glamorous rooms in the house, but they are one of the most functional. And if they aren’t designed correctly, they are the most likely to breed frustration and annoyance in the household. You don’t think about them much when everything’s going right. But the second something goes wrong, they become the most hated room in the house.   Americans in the restroom According to ABC News, “If you’re a typical American with a typical job and typical benefits, you’re spending as much time in the bathroom as you are on vacation—14 days. . . . At that rate, if you reach the ripe old age of 80, you will have spent nearly three full years in the bathroom.” So how can you make your bathroom more functional and plea`5sant to be in?   Bathroom storage ideas Lack of storage is a big complaint of renters and owners of small houses. You need space for towels, toiletries, cleaners, toilet paper, etc. and it’s tough to fit that all in under a single sink. One way to maximize space in a small bathroom is to get a set of over-the-toilet shelves. Some are minimal—simply two shelves stacked on top of one another—and some have mirrors, shelves, closed doors, etc. They come in just about any style and DIY homeowners can always build their own with old, repurposed shelves.   Another way to add storage to a bathroom is by making use of empty wall space. Can you hang anoher towel rack? Hang more cabinets? Get a shower caddy to hang from the water faucet? Knock a little space into the sheetrock to make more cupboards? There’s always something you can do with wall space.   Bathroom decor Bathroom time is more pleasant if you enjoy your surroundings, so look for ways to add color and personality to your bathroom. An accent wall adds visual interest, and it doesn’t have to just be a paint color. Think about adding wallpaper, tile, stone, wood, or even brick to make your bathroom more than a blank white canvas. Hang pictures with matching frames, add a shelf with interesting objects above the toilet, put a vase of flowers on the back of the toilet. Sometimes something unexpected is just what the room needs.   Another notoriously lacking aspect of a small bathroom is seating. If you have a tub/shower combo, you can add seating by creating a cedar bench along the back of it. It just takes a few cedar planks bolted together and stained to be waterproof.   Interior Decorating and Remodeling News Brought to You by BaseBoardRadiatorCover.com Source: abcnews.go.com/Entertainment/WolfFiles/story?id=93103 pinterest.com/countrymarket/bathroom-decor/      

aicell risf

aicell risf

 

Leather Louis Vuitton iPad Mini 2 Case

It is going to be a wallet look like case, the genuine leather Louis Vuitton iPad Mini 2 Case isn't a thin case however it doesn't add too much weight. The case fits all versions of the iPad mini around the world and each iPad user in the eather can make good use of these great products.   From the product picture and description, we can see that this is a very sturdy, high quality material, well built item for the phone lovers.   A good quality case won't add too much bulk to the device and their Designer iPad Mini 2 Cases meet all of your requirements.

susan green

susan green

 

Sunday june 28th

Welcome to my blog, everyday I will update this blog what I do ragarding it is r/c racing with my boats, buggy or what I did today for my business (visit my website www.fruitofthejungle.ws for more info) . I also write about what I did with my family. Today I am preparing my cat for a testdrive. I changed from crystals to 2.4ghz in my Sanwa/Airtronics M11.   Update: went to the lake and I tried a cheap 38mm prop and in the corners it cavitates. On the straight it has not so much speed as my old setup (5S now running 4S) but it has good speed. At the end one of the battery leads became lose of the connector and the boat was dead in the water! I was lucky that it was only 1 feet of the shore so I had to step in the lake to pick it up. I have to re-solder the lead and try another prop.

MrUnlimited

MrUnlimited

 

New old guy.

1951_Chevy.pdf Hello all. I'm a new old guy. This is my first blog. I restore and build street rods. As a ut I loved to build model boats nad planes. I know have a grandson that likes to do the same. I have an old Dumas 36in hydro we are putting together. Much fun so far.

Lauren Porsch

Lauren Porsch

 

Prop #2

Decided to pick up the sticks again and work on prop #2. These are some small paddles, and its taking time not to screw them up.   I put a prelimnary polish on this one to see where my scratches were that need to be taken out with the next stone.   O&R had left factory balance marks on the back of these, but no where near balance. Almost wish they hadn't touched them because they left large divits that have to be polished past, and then still are out of balance. If anything, they are helping me thin out the blades past where I would normally want to go.    

jetpack

jetpack

 

2008 Winter Spectacular

We once again travelled down to Sydney for the 2008 Winter Spectacular, the only event where you have a winner take all final for open petrol hydro, open petrol mono, X Mono, X Hydro and 1/8 Scale.   It was very different for me this year as I would not be defending the two of the biggest titles, the 1/8th Scale Silver Cup, which I relabelled "Grub's Cup" as we have won it for the past three years and also didn't have the new twin rigger ready to defend the X Hydro Pete Purcell Memorial Cup.   I almost didn't make it to the event due to a car accident a couple of days before but with help from the in-laws and a few offers of assistance from other racers we got down there on Friday morning for practice. It was a nice change for us, as we had been experiencing torrential rain for the three days prior and it wasn't raining in Sydney. We got everything set up and then I collected my new engine from Winksy for the 21 Seaducer, as I blew the greenhead up a couple of weeks before and within an hour we had it running around. After 1/2 tank of juice I thought it may be good enough. 1/2 tank through the 90 Seaducer and the 45 Seaducer stayed in the trailer as it is my favourite boat and it very rarely lets me down (famous last words).   Saturday morning we were greeted with torrential rain (looks like we brought it down with us) and everyone got out the rain coats for the day. There were a few guys up from Victoria and they tried for an hour to tough it out in the rain but eventually had enough and went down to the camping place and got a gazebo to keep themselves dry (good move that one).   First round of racing got under way and it didn't get off to the best start for an event. The first heat was electric hydro which went with no trouble but then there was computer problems due to the rain. Once these were fixed the next two heats of C hydro produced no finishers and we started to think that the conditions are going to test us. Back to the pit area, lengthen pipes and richen the mixtures so that we have a more reliable base before we start. First up I had X Mono and squared up against Steve Winks for the first time. He got the jump at the start due the two other boats crossing lanes in front of me around buoy 5 and 6 putting me well behind. I caught up to the two boats again, overtaking the first one on the second lap and on the third lap around buoy 6 the second place boat went from lane 4 or 5 to almost hitting the buoy and putting me up in the air. I banged my hand on the railing thinking that was it but the old man grabbed me and said its still running. We cruised around for a hard earned third place. Thank god for the longer pipe and being a little rich which kept the boat going when we flipped it. Dad than raced his petrol Seaducer and raced hard for a third place.   Next was the unproven 21 Mac Seaducer and we hade had no idea what was going to happen. The little bastard surprised us and hauled ass but two buoy cuts meant we lost a few points. The B Mono was interesting as we were up against Brett Ward and the two boats are almost indentical in speed. Brett got the jump on us and was able to cruise around but we got the second and banked the points. We had the same trouble in that heat as the X Mono due to drivers not holding their lanes, one instance coming in on me and causing me to take avoiding action by cutting a buoy, which cost me in the long run. First rould wasn't that great but banked some points.   Second round on Saturday afternoon was again affected by the rain. Took an easy win in X Mono, just cruised around only had to open it up three or four times just to keep a decent lead and take the win. Dad and his petrol Seaducer nailed the start and held off two other competitors to take a win. The A Mono took off like a shot duck and took the win, surprising us once again. The second round of B Mono was held on Sunday morning and the weather was much better and it was starting to look like it was going to be a nice day. The B Mono than gave us the biggest shock of the weekend, in the lead, last lap, rounding buoy 6 and the boat launched itself off the water and dunked giving the win to Wardy. This is the most frustrating thing when you need to score points in every heat as there are only three rounds.   The third round produced no surpises for me, another cruisy run in X Mono, the A Mono ran around like it had a firecracker up its backside and the B Mono took the win as well, although Dad was fighting for second in his heat and caught a rooster tail and flipped. After the three rounds were completed, I ended up with 1st Place in A Mono, with no little practice and a new engine, 2nd place in B Mono thanks to the dunk in the second heat and qualified second for the X Mono final behind Steve Winks while Dad surprisingly got third in Petrol Mono.   The X Mono shootout final was looking good as we had some of the best X Monos in Australia lining up although without Tony Jones, the X Mono king, it wasn't the best field ever assembled. As the countdown approached the start Winksy and I were side by side and as it hit zero we took off. We went down the straight side by side less than a foot apart (geez its good when you can trust a fellow competitor that much) and he took the inside lane around the first turn with both of us just squeezing inside a dead boat. Then there was another dead boat in the back straight which caused me to back off to avoid it and it was all over. Now I had to contend with someone catching me but our boat was quick enough to stay ahead and we battled the rough water to secure second place.   Not a bad weekend, a first, two seconds, ony used 4 litres of race fuel, two glow plugs and an exhaust silicone. Probably one of the more enjoyable (other than the weather) weekends of racing I've had in a long time. No expectation to win the scale trophy again, no twin hydro to fuel and maintain, so I had not much pressure and plenty of spare time to talk to everyone and watch some good racing. So I had good fun and it didn't cost me too much, can't ask for much more.   Our club guys performed very well, Al won the Silver Cup, Ashley battled the twins with his single X hydro and got third in the final and Paul (White Ice) won petrol cat. I'm sure there were other trophies, I think Al got a place in sport hydro as well but my memory is gone as I type this.   It was funny to see Steve Winks collect the first place trophy for petrol sport hydro with quite a few people in the crowd yelling "Gas Gronk" and then he pointed at Wild Bill saying "You're gonna get one next". I think Bill is dreading the day he said he would allow people to bend him over before he gets a petrol boat.   Next year, if I get may act together and finish a few boats we should be able to enter a few more classes and get that adrenalin pumping. Its nice to watch the racing but there is nothing like racing the twin and winning a winner take all final. So now back to the shed, I need to finish the new scale boat and the open petrol hydro and Dad's almost finished the new twin.   As it was Fathers Day on the Sunday, I have to thank my Dad. It was great to see him get a heat win and end up with the fastest time in his class. Happy Fathers Day mate.   Next meeting on the cards for us is the Hunter Valley Championships in November. See you all there.

Grub

Grub

 

remote needles

having trouble with remote needles need help, no good runs all year since needles were installed. running popeyes .21 with ops and a hawk 3.5 with picco. runs on stand, popeyes will not plane or get on pipe and hawk runs on stand but dies immidiately when it hits water. have gone from 1 and 3/4 turns all the way up to 4 turns and everything inbetween 1/8-1/4 turns at a time. not sure what to do next please help..............

chapsgixxer

chapsgixxer

 

2008 World Oval Racing Challenge

A memorable event it was for good and bad reasons.   I was pushing the envelope just to make it to the event, building boats and working the day before racing meant that I would miss practice and have to race with unknown set-ups. Entered A Mono, B Mono, X Mono, B hydro, X hydro, Multi Engine, 1/8th Scale and 23cc Petrol Mono.   A Mono hasn't missed a beat in the six months I have had it but in the first heat it seadunked so I was behind everyone from the start. Never really got a hold of the set-up or mixture for the whole meet and finished most races but didn't place in the overall standings.   B Mono was much better although we seadunked twice. I got a number of heat wins which got us second place. Unlike not so long ago where you could motor around and get a trophy, now there is a lot of fierce competition and if you don't race flat out you're not going to get anything. B Mono is still my favourite class and it seems it is getting more popular.   X Mono. Brand new boat that was finished a couple of days before the event and only had an hour to test it at our home pond. Dunked the first heat but after that ran pretty hard. A couple of heat wins and some placings meant we were in the running. In the last heat, Tony, Craig, Winksy and myself were lined up together with Tony and Craig leading the points. Winksy wanted to play the spoiler but during mill time Craig stopped which meant no one could catch Tony on points. I nailed the start and Winksy was hot on my tail but couldn't get past and the win took us from fourth in the points to second. Not bad for a virgin boat.   23 Petrol Mono. We entered the crackerbox known as "Schitta-box". Again only just finished it before the meet and only had one run with it previously. Mixtures were wrong for most of the event but think we fried a couple of gaskets early and thats why it was hard to tune. We did get out on the water a few times and had the skid fin well out of the water showing everyone how fun it was to drive one of these boats.   Multi Engine and X hydro. Had a couple of good runs with the twin Cajun Bullet but on Thursday it all came to end when in the multi engine race, I opened it up down the back straight to overtake a few guys and it left the water as i entered buoy 4. After flying for an enternity it hit the water backwards, jammed the throttles on full and proceeded to enter the racing line where it ran head on into Wacky's twin. I knew it was bad when it came back because both engines were hanging out of the bottom of the boat. On the plus side I saved a lot of fuel by not being able to run the rest of the heats on Thursday, Friday and Saturday.   1/8th Scale. The old Miss US came out to play again and she was a little grumpy the first couple of runs as I found it difficult to get a mixture. When she did come on, she dunked in the rough. With nothing to lose in the last heat, Al and I went for it. Miss Bud and Miss U.S. side by side for five laps, full throttle and running on the edge with only inches apart. On the last lap Al left a foot gap between himself and buoy 4 and I took the gap and buoy 4, I than ran wide and Al went up the inside but he ran wide exiting the turn and I went back up the inside to win by a boat length. Probably the best scale boat race I've been in although after the race I noticed that the bottom of the sponsons on my boat had given way which means that was probably her last race.   The B hydro didn't get finished in time plus the new pipe didn't arrive so I didn't race it.   The event overall was very good, plenty of hot days (over 35c/100f each day) and the venue was excellent with very good canteen and toilet facilities. It was good to meet up with Al Hobbs, Lohring Miller and the Hills once again and also great to meet the Kiwis as well. The Instigator Twin hydro will live again one day and now that Miss US is hurt, I can't put off building the new one any more. I probably didn't do as well as I thought I would but only have myself (and work) to blame for not practicing and rushing everything before the event.   Big thankyous go to the MBCofNSW for putting the event on, my Dad for being Dad and also for crewing and putting up with me, Winksy for help with the scale boat, Tony and Frank for the parts and help and Ian W for repairing a few things. Without people like this in the hobby, we wouldn't enjoy it, as they helped, not only me but others as well, get boats back on the water so we could race.

Grub

Grub

 

Old Stly K&B parts and more

K&B 3.5,7.5 IB,OB needle valve old style $4.90 3 K&B O-Ring 3.5 carb neck 1.45 6 K&B .40 Piston Ring 8.2 2 K&B .40 Front HSG Complete only 49.6 2 K&B Hin Pin 7.5 67 82 1.00 4.3 2 K&B Old Style .67 rear rotor 16.5 3 K&B .67 IB OB Head Botton 13.5 2 K&B 3.5 IB OB Cooling Jacket 13.5 3 K&B 3.5 combustion Chamber IB OB 8.5 1 K&B 3.5 Carb Control Arm Kit 4 5 K&B .67 old style back plate 25 2 K&B 7.5 Backplate Only (P.T.O) 14.9 2 K&B 67 82 P.O.T Shaft 14.5 2 K&B 3.5 Front HSG Only 6.5 2 K&B 7.5 Wist Pin W/Pad 9 2 K&B 67 Old Style Disc Valve 48.5 1 K&B 3.5 OB Steering Arm 4 7 K&G 3.5 Wrist Pin W/Pad 7.5 7 K&B .40 Conn.Rod 11.6 4 K&B .40 Drive Collet 4.5 2 K&B .40 Ring Piston 17.5 2 K&B 3.5 Carb Draw Bar 5 2 K&B 3.5 Needle Valve Collet locknut 5.6 3 K&B 67 82 90 Wrist Pin retainers 12.5 1 K&B 7.5 67 Water Pressure fitting 2.5 7 K&B 67 rear bearing 20 4 K&B .40 Wist Pin W/pads 8 3 K&B 7.5 Flywheel IB 12 2 K&B 3.5 Conn.Rod 20 4 K&B .40 Carb Spring 2 1 K&B 67 Wrist Pin 9.5 1 K&B Flywheel Nut OB 2.5 1 K&B 67 Hing With Screws& Clamp 14 1 K&B OB Steering Arm 4 4 K&B 67 OB Crankcase 90 2 K&B O - Ring 2 4 K&B .40 Cylinder 19 1 K&B 3.5 Idle Needle O - Ring 1.75 7 K&B 3.5 Gasket Set 3.5 7 K&B 3.5 Exhaust Adpt 8 2 K&B .40 7.5 Gasket set 3 5 K&B .40 Back Plate 6 3 K&B 67 IB OB Head Button 13.5 2 K&B 67 Crankshaft OB 49.5 3 K&B 7.5 Barrel Idle AdjScrew& nut 4.5 9 K&B 7.5 Drive Collet old style 6 6 K&B 7.5 FlyWheel Siud Old Style 1.5 3 K&B 67 Carb Draw Bar 8 3 K&B 3.5 OB Flywheel only 9 1 K&B 7.5 Head Shim 3.5 1 K&B 3.5 Head Shim 3.5 1 K&B 11cc Needle Valve lock nut old style 4.5 2 K&B 67 IB Drive collet only 5.5 1 K&B 67 Water pick up tube 5.5 3 K&B 7.5 Crankshaft early style 36 3 K&B 7.5 OB Control ArmCarb 2 6 K&B 3.5 Piston & Cylinder 64 1 K&B 61 Idle Needle 5 5 K&B 7.5 Crankshaft IB use larger pin and rod 38 1 K&B 7.5 IB Exhaust Adpt 8.5 2 K&B 67 Back Cover O-Ring 1.15 2 K&B 7.5 Back PlateW/Drum Rotor 44.8 1 K&B 3.5 Hin Pin OB 3 3 K&B 3.5 Crankshaft-LH With Long Crankpin 14 4 K&B .67 Pipe Adapter 20' w/screws 15 1 K&B 7.5 Draw Bar 8 1 K&B 3.5 OB Adj Mount 8.95 1 K&B 7.5 Comb Chamber 7.5 5 K&B 7.5 Cooling Jacket old style 8.5 4 K&B 7.5 Head assembly IB 20 3 K&B 40 Head assembly 20 1 K&B 7.5 IB Back Plate 45 1 K&B 3.5 PropShaft & Water pick up ass. 30 1 K&B 7.5 O-Ring Exhaust Extension 2 5 RH-1 Scale Motor Mount bottom mount 40 1 RPM P 67 Rod 45.99 2 Octura Streamline w/pickup Or outlet 3.5 12 CMD 3/16 Saft Bushing 6.47 2 DU-BRO Universal Kwik-Switch Mount 3.7 17 Engine starter Belt 6.99 6 Octura 150L-24 A Flex cable only 4.98 5    

Charles Ross

Charles Ross

 

2007 Australian National Titles

Well fill me full of beer and call me "James Clegg" because I had a shocker and probably shouldn't have woken up on the last morning.   We arrived at Cherry Lake in Mexico (Melbourne) on the Thursday morning after driving all night from Newcastle. It was a beautiful morning and practice was good with no major problems.   Race day came and the weather slowed everyone up a bit. The funny shape of the lake and the wall caused the water to be a little rougher than we expected. Heat times showed that everyone couldn't go too fast otherwise they nosed dived and ended up stuck in the mud as the pond was only 2 or 3 feet deep. Plenty of boats were lost at times and rescuers had to wade around looking for them.   B Mono was my best chance as this MAC/Seaducer combo had been fast and so consistent in previous months. But alas finished the first four heats with three wins and a second and all I had to do was finish within one place of Steve Treadway in the final heat. It was the start of pit time I realised the pressure was on then when pit time commenced the stupid thing wouldn't start. I tried everything, flus the engine, new plug, turned up the heat on the plug, swore at at it, hit the boat and then eventually with 1 second remaining it started and I ran for the drivers stand. My pit man lifted the boat off the stand first then removed the plug heater and threw the boat in the water. When we hit the water I had 25 seconds to get a mixture and no matter how lean or rich it just wouldn't get up. We made it round for the start with all six boats crossing the line in close proximity and then we all proceeded to round the first turn very slowly as everyone had the same problem with their mixtures. Tony Jones quoted "they looked like a bunch of tortises crawling down the back straight". At the end of the race Steve got 2nd and I got 4th and lost the title by 31 points. 2nd is not bad but ITS NOT AS GOOD AS FIRST!   B Hydro, well this was a boat that I took that basically had never really got going before and on race day nothing changed. It was just the small things that either came loose or broke that caused it to stop. But in the third heat it stopped on the water and got run over by an out of control boat and ripped the back side out of the radio box. Lucky for me the pipe stayed attached to the header. 2 bottles of CA glue were used to glue pieces of wood around the radio box but to no avail as in the final heat the boat decided enough was enough and lost radio and the boat went for a long wander to the other side of the lakeand into the reeds at full noise. 2 things that were luck was that it wasn't really running to fast anyway and it just missed the concrete wall. Back to the drawing board for that boat and possibly a paint job to get rid of the unlucky orange and white scheme and go with my lucky black with yellow sponsons.   X Hydro, just finished rebiulding this boat two weeks prior to the event after destroying it at the Winter Spectacular last year. Only run a few tanks through it on the previous weekends and expected to do okay with it. Went out in practice and never had the chance to really open it up because of other boats on the water so I left it for the racing. In the first heat I went out and leaned it off but obviously not enough as I ran out of fuel on the last turn again (memories of the NAMBA Nats flashed through my head). In the second heat wiated a little longer in pit time before we started and we hit the water with plenty of time. The mixture button was working overtime and when I hit the sweet spot the boat really took off. I nailed the start and after 3 laps had put a lap on almost every other competitor but stopped on the back straight. Upon returning to the bank I saw that the water lines had holes everywhere and the pressure build up in the lines caused them to bubble and burst in a number of spots. I spent the next half hour trying to locate some Tygon line and then replaced all the water lines with tygon. The next two heats I finished in 1st place by idling may way round in the rough just wanting to finish. With one heat to go, good weather, calmer water (it was never going to be calm) the last heat shaped up to be a good one. Everything went like clock work, the boat started we got on the water, really leaned it off and we nailed the start once again. 15 second first lap, 12secs the next, 11 secs the next and then on the fourth lap to many holes on the right turn and the boat went towards the sky once again. Luckily this time I only broke one cowl clip. With two heat finishes I still got third place which is not as good as second and now where near first.   In the end it was great to catch up with Winksy, whose new Wideboy G3 hydro finished first in B hydro, Phil, Aaron, Tony, Shane and Brett plus all of the other guys from down south. A total of 10 hours driving to get there and another 10 to get back, 8 tanks of fuel in the car, 6 nights accommodation, 15 litres of race fuel, two rolls of radio box tape, 2 bottles of CA glue, one pipe mount, 1 new receiver, three engine mount rubbers, 25 glow plugs, a wet trailer thanks to the rain and a large amount of Coronas were used to make this a good weeks racing.

Grub

Grub

 

looking back on importance of aerodynamics

well no questions or comments yet apparently so we shall continue. In the mean time i upgraded my computer system and rechecked some things and I got to a point that i think i can make a better claim about this comment I made earlier.   many people have this impression and i to have this impression but is it true? well to find out we first have to quantify all major drag components of our boat. to do this the famous aussie Ken Warby, holder of the current water speed record at 317.596 mph, gave us this example Mr Warby's calculation from his website of what is suppose the calculation of a boat similar to his boat just under the current record. well from this if we take the ratio of each drag component (combined by source, i.e planning surface, rudder and aerodynamic) over the total drag we find: planning surface 14.0% of total drag rudder surface 51.8% of total drag aerodynamics 34.2% of total drag   So for this case the claim still appears true. now eventhough Mr Warby presents a clean looking calculation when I wanted to do a similar calculation for our hulls i found i needed to change the input a bit. for instance the planning surface area ratio is constant according to this calculation therefore the lift coefficient remains constant and thus the lift increases with change in speed. right you might say? well no in the case of a boat planning at speed lift force can change but in turn this will mean the boat will come up higher out of the water (considering no sudden weight change and no aerodynamic lift). this means the planning surface area changes, thus the lift coefficient changes etc. well to keep things simple there will be a point where lift force equals the lift coefficient belonging to a certain surface area ratio. since the width of a sponson does not change just the wetted length changes and this equilibrium can be found iteratively.   the other thing i changed to do the calculation was the aerodynamic drag coefficient. Ken claims a Cd 0.2 but for a small boat with big round surfaces (tubes, engine etc) this is highly optimistic. from my 1/2model simulation i found a value for Cd of about 0.47. that's about 2.3 times more. the rudder i kept the same expect for filling in the proper values, the result was surprising.   planning surface 31.8% of total drag rudder surface 10.5% of total drag aerodynamics 57.7% of total drag   now in my simulations an improved model gave me a new Cd of around 0.37 and since power is equal to the total drag times the speed this meant the boat needed 10.6% less power to sustain the 100mph speed. in my opinion 10.6% is a great improvement. and suddenly it doesn't seem half bad to play around with aerodynamic improvements although they are still more difficult to solve then for instance gaining 3% less power taken by cutting about 10mm length from your rudder.   right so next time as i promised before a bit more on round shape drag. but i forced myself to go back over the calculations and clean improve there validity to present them better.

Tom v.d Brink

Tom v.d Brink

 

what was found initially

Right so as explained a preliminary simulation was done on a cad modelled outrigger. the outrigger resembled the hull as I had run in 2003 or better explained a model near an eagle SG with just details changed to better suite saw performance. Off course a cfd simulation is always just an approach to reality. the software needs a lot of computer power to run even a simplified model. therefore the model had to be simplified and some things could not be simulated completely. The concessions that were made to suite the cfd software were: -the simulation assumed a model to have a symmetry plane in the longitudinal direction. * As we simulated on the rudder side this means a hull would pretend to have two rudders * The carburettor only had a fuel intake side. * No fuel and water lines were included in the model - the software did not take into account any interaction between a liquid and a gaseous fluid. * chosen was that no water would be simulated only the airflow. * the water surface would be represented by a moving flat surface - no surface roughness was applied. * this means that all boundary layer flow will likely remain laminar for a longer length on the model before attempting separation. it will reduce the model's air resistance but as it is applied to all surface the component drag scale to the overall drag will still be valid. - the model was mainly tested at the target 100mph speed it would have to achieve. only a few lower speeds were run but they shall not be discussed here.   So a lot of things did not yet scale to reality yet. despite that effort was made to enhance and study in more detail the components that were included in the simulation when discussing simulation results the question is always how detailed was the mesh of the model. so great effort was made to detail the mesh round surface and straight edges. the simulation was run in various mesh settings to achieve optimal convergence at the end of the calculation. this was a long and lengthy process but does give the project proper validation.   after several simulation runs some primary conclusions were made to describe the components of the model causing aerodynamic drag. the total component of the aerodynamic drag was made up out of three major components besides the tub. in following order they were the round sponson boom 37% the open engine 21% the sponson 20%   this was with the traditional sponson shape. however another run included a different sponson shape and the boom resistance as well as the sponson resistance increased to 42% and 24% respectively. The amount total aerodynamic drag is as many have already claimed not as high as a potential hydrodynamic drag. but to people who are trying to get the all the speed potential from their boat i would say it is significant enough to notice.     well now that we know what our major players are for aerodynamic drag next up will be a study of these parts individually and their relation to the drag and stability of the boat. starting with the biggest component the booms.    

Tom v.d Brink

Tom v.d Brink

 

blog purpose

Welcome Readers and fellow boat fanatics,   When starting high school I had no idea how interesting this hobby was going to be when a friend brought me to the lake the first time. I started with a little electric that was great fun. what was supposed to be just a hobby has become a big part of my life. I thank a lot to all the very experienced boaters who shared their knowledge so freely on the web. it started as the listbot and has now become many forums which daily have good information for all boaters from beginners level up to the more seasoned boaters. In this blog I plan to give back to the web what it has given me when I needed knowledge and learned (and still learning) from the experience of others. I plan to write some interesting articles about the aerodynamics of our model boats. the topic will probably not suit a beginner level boater that much and I do advise every one who reads this to improve your basic knowledge first before you embark on the aerodynamic path. In the articles I will give evidence to the improvements but also point out the sand traps along the way. but first a bit of what I have done so far:   well in 2000 I started to be really interested in SAW running with my .45 outriggers and since then I looked at a lot of aspects of running a boat at high speeds. in 2004 I had some help from a Dutch company specialized in simulation software who ran some cfd-analysis (computational fluid dynamics) on the cad models I presented them with. It would be an understatement to say that it was just interesting. From what was learned by the simulation I build a boat that ran well but gave additional problems to the list of problems I was already facing. that is why I build another boat taking a step back to the basics. this basic boat helped me learn again to get the simple things right and brought me an official back-to-back pass of 103.57mph. The aerodynamically improved boat still holds my one-way record at 105mph. So the step back has proven to me that it is necessary to get your basics right and then try to get that last bit from the aerodynamics. however it will show that at high speed a little change can make a big difference.   So what can be expected in the blog further? well first of all feel free to ask a question and if I have any knowledge on the subject I will talk about it. And second I will start with the basics as it is also a learning path for me to really write down the plain facts. by writing it down it forces me to think about it harder and understand it a bit better yet again. and finally I hope it can be something that every one enjoys reading.   As a final word of caution I am not a aerodynamics expert. By trade I am a junior engineer working on strength and stress analysis (this is also a topic that can be nice to discus perhaps). My personal interest is fluid mechanics and in that context I will write here.   so next topic will be some results from the first basic study.

Tom v.d Brink

Tom v.d Brink

 

2006 Winter Spectacular - Sydney, Australia

Less than two weeks after returning home from the US, the next major race meeting, the Winter Spectacular, was our our next assault. After claiming the Silver Cup in 2005 we were hoping we would be able to take it home again.   Practice on Friday was very good, my twin X hydro, the Instigator, ran well except for a few small driveline parts failing at the end, the B hydro went round and round (it wasn't the quickest but it was reliable) and the scale boat, Miss U.S. hauled ass.   Well.........then Saturday came along and I was ready for my first beer at about 11am. First heat of B hydro we cruised around for third place, not a bad start to the day. Then it happened, the X hydro wouldn't start and then the scale boat only did half a lap and stopped. One finish out of three heats in the first round. In the second heat of B hydro while leading for three laps two other boats passed me on either side down the back straight then proceeded to cross paths 5 feet in front of my poor little boat. Another DNF. The X hydro started the next heat, made a near perfect start and pulled away for the win in a time of 1.04. The scale then went 40 yards and stopped. I was now really p'd off with the scale and pulled the motor down thinking it was engine related but after an hour of investiagtions found a 1 inch split in the pressure line. Third round, B hydro cruising around but the low sun caught my eyes each lap as I didn't have sunglasses on and couldn't see my boat cause eyes were adjusting slowly in the shadows and flipped while behind Winksy. That was the end of Saturday and thank F@#$ for that.   Sunday, first heat up was X hydro and again performed a near perfect start to cruise to victory and top qualified for the winner take all final. Scale boat actually completed a heat but after screaming around during mill time went off during the race to crawl around and finish. The mixture wasn't on the money yet but the next race was the final. Last heat of B hydro was a real good one, got the best start of my weekend and held a two boats that were much quicker for the five laps. I never spent much time mor ethan 2 feet from the buoys in that heat. Next was the finals. Up for grabs were a number of perpetual trophies offered by the MBC of NSW but the two I was after were the Pete Purcell Cup for X hydro and the Silver Cup for 1/8th Scales.   In the Pete Purcell Cup final, with the Instigator running near perfect, I made a perfect start in lane 1 to lead around the first turn and opened a comfortable gap. Thinking I'm out in front and I should just back off a little, the next time down the back straight the twin left the water and almost did a complete loop before crashing into the water. It just wasn't my day. Congrats to Richard S. for being more reliable and actually finishing and winning the final. I was credited with third but unfortunately doesn't make you feel better after having it in the bag.   In the Silver Cup final, Miss U.S. took off like a rocket and I said to Dad while she is running we are not backing off in case she doesn't come back on pipe. Top qualifier Al Ansell unfortunately did make it around the first time and a few others stopped so it looked like it was just me and Graham Mason with Burien Lady. We came across the line nearly side by side then went into the first turn at full noise together and down the back straight. As I rounded the bottom turn, Miss U.S. decided she was too lean and proceeded to slow. Thinking I am front and if I finish I still might have a chance we got her in lane 1 and readied ourselves to make the next four laps really tight. Too our amazement Burien Lady did exactly the same thing and both boat were running very slow with a few feet of each other for the next four laps. It was one of those nervous moments when you're just about to cross the line and the boat had a cough but we made took the win and the Silver Cup for the second year in a row.   One of the highlights of the weekend was the un-announced arrival of Agressor, one the famous Australian unlimited hydroplanes. The presentation was then held with Agressor in the background and everyone got their rewards for the efforts over the three days. All-in-all it was a well organised weekend and we got to meet up with quite a number of interstate friends as well as the usaul locals.

Grub

Grub

 

Return trip

Well this is the first time that ivé been abele to get to a computer it's now 3.00 am Hong Kong time what can i say the world champs was aursom to many storys to tell now but i will when i get home.   The trip home hase been lets say intereting with the problems at London we had to change our plans we had to stay an extra day and then fly to Helsinky where Roger, Saira and my self parted company they flew to Hong Kong then to Sydney but my route was diffrent. From Helsinky i flew to Nagoya Japan and hade to waite 12 hrs befor my conection to Hong Kong were i have to wait a nother 8 hrs to get my conection to Sydney boy am i tired.   Thats it for now ill fill in the details when i get home.   Paul

ozzy2

ozzy2

 

WC 2006 Norway Team Australia

Well its that time again team Australia ready to take on the world one day to go and off we go packed , repacked , repacked again to much weight   When i find internet access i will give a running update as we go this is going to fun.  

ozzy2

ozzy2

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