Picco p zero rigger

[Amp Eater]

Hi Sam,

Do you have any pics of the engine bay showing your flywheel / coupler set up?

Great run your best pass per my audio tach read 38,427 rpm did you mod the X430 any?

I have been working on a P-Zero powered rigger over the last month getting close

to testing. I am using a 2.2mm flex cable I fear it is too weak and wont last. Cable

is held on with four grub screws.

I have ask Jeff Wohlt if he will make up a 4mm / .062 piano wire coupler waiting on an answer.

Really don't want to snap the 2.2mm cable and loose a custom cut prop.

Here are some pics 499g ready to run with 2oz of fuel on board.

Also see Maxim offering from France 365g less fuel balsa with thin carbon for skin

same stuff the glider guys use.

44k on the dock no load

36k on the water with a stock X427



https://www.youtube.com/watch?v=qEKjR0_JjpA

 

[Amp Eater]

Someone had mentioned the side exhaust .07 it is a Vertigo .07.

I have three of them one converted for an RC plane. Note there

is an Italian Sirio .09 here is a pic of these engines next to a

Picco .85cc engine I have bench tested the .09 thus far worthy.

Past that weight / size fly up fast . Honorable mention the Fuji .05

gets 37k rpm in the air I know.

Sirio .09 / 101.6g (integrated carb very low weight for an .09)

Vertigo .07 / 104g without pull start / (with pull start 148g)

Picco .05 / 96g / (142g with pull start)

I have upgraded the Sirio with a high compression head and back

plate, past that there are no other offerings. Weight jumps up fast

with a typical flywheel and coupler in conjunction with all the extra

fins.

 

[shoboat]

Amp Eater,

Where do you buy the Sirio .09 motors from? Japan?

Sirio S09-R Engine 625 042 Japan Import from Amazon $252.38 shipped free.

Do you have a site address for this Maxim in France?

Thanks,

Mark Sholund

 

[Amp Eater]

Hi Mark,

I bought my Sirio off ebay much cheaper. There are three versions mine is version 1 / sourced for $78.00,

I upgraded to version 2 with the high compression, back plate and head which I found on ebay too.

Version 3 has a improved integrated carb.

Here is Maxim build thread:

http://www.offshore-rc.com/forum/index.php?/topic/33252-picco-p-zero-saw/&page=1

Ebay link for cheaper price on version #3 / $141.00 / Free shipping

SIRIO 09 ROUTE246 SP version 3 R246-4050

http://www.ebay.com/itm/SIRIO-09-ROUTE246-SP-version-3-R246-4050-/121932641021?hash=item1c63c072fd:g:-RcAAOSwvFZW8U85

Another new one going for $154.00 / Free shipping here:

http://www.ebay.com/itm/NEW-SIRIO-09-ROUTE246-SP-version-3-R246-4050-Airmail-from-JAPAN-/182054958927?hash=item2a6352374f:g:M~8AAOSwKtVWvXud

At some point I plan to retrofit the .09 into the Picco rigger as a power upgrade, is why my tub is all ply.

Also want to try the Vertigo .07 here are some bench testing vids of the two engines. The best made

engine is the Picco out of the bunch however the jump in displacement have these two worth using.

 

[Amp Eater]

Breaking in the engine, nearing the end of the third tank I leaned

out the needle just enough to jump on the pipe. Soon as it hit

I backed off, but gave me an idea where the engine would be

no load with the Profi full wave tuned pipe. 44,412 rpm hits

around 1:14 into the vid. Will run it a bit rich for the first few

test runs on the water with the needle set at 45k. Safe peak

should be around 46.5 in the end for a potential 39k loaded

pass with a cleaned up X427. 60 + would be nice for a 26" rigger.

Also made a .062 wire drive out of piano wire and brass tube.

modified 1930 taken down to 1926 would be worth trying in time.

 

[shoboat]

Amp,

Where do you buy the Profi full wave pipes?

eBay?

Thanks,

Mark Sholund

 

[Chris Wood]

http://www.rcgroups.com/forums/showthread.php?t=2684743&page=2

 

[Amp Eater]

Yes Chris has pointed you in the right direction I am Amp Abuser on RCG

I have 4 of the Profi pipes and have enjoyed the boost of power they provide

with planes and next is for my rigger design. 14g in weight top quality each

one of the 4 are exactly the same. Thin and proportional for their size, yet strong

and hard to ding.

Alberto gets them in to the US in batches I spread the word when I see them for sale as they go fast.

Can message him on Ebay and ask when he may have another batch in. Fast shipper 3 days.

http://www.ebay.com/usr/speeddomingoe

You can go another route will cost a bit more state side vendor can source spare pipes.

http://www.hobbyclub.com/index.php?main_page=index&cPath=44_63_151

http://www.hobbyclub.com/index.php?main_page=product_info&products_id=1610

P.O. Box 6004
San Clemente, CA 92674
(949) 425-1362 - Voice
E-mail : [email protected]

Here is the link for the Profi Site overseas

http://profi-me.narod.ru/indexmain.html

http://profi-me.narod.ru/

These folks can source too.

http://www.rusengines.ru/?lang_upd=en

Off the hip

This guy has sold me two 1.5cc tuned pipes and an engine all on 3 separate times.

He may be willing to source the correct Profi .08cc and send your way if you ask nice.

Good guy spot on with getting the goods over to me with 100% rating.

http://www.ebay.com/usr/oxenea003?_trksid=p2047675.l2559

 

[Amp Eater]

Today I was able to get in a test run of the rigger with a stock X427

Few still shots launch, pass and then docking with a rigger eater

on point ready to munch.. good dog really he enjoyed the run.

 

[David Bryant]

Today I was able to get in a test run of the rigger with a stock X427

Few still shots launch, pass and then docking with a rigger eater

on point ready to munch.. good dog really he enjoyed the run.

yes, impressive the speed you're getting from (essentially) a 1/2A engine! And the dog's even impressed

 

[Amp Eater]

Yes after trimming the rudder the passes gained some speed, the Dog may have had more fun than me

I have placed an order for some Octura props the 1.25 and 1930, will cut them down to suit the available

torque. Pic shows the data to the mods. I have a modified X427 can try this weekend will give me a jump

in rpm in conjunction to leaning out the NV more / reduced to X424.5 should unload to 36k+

 

[Sam Peden]

Hi Amp, I de tongued and cupped the x430, as well as cut it down to about 26mm. I would love to get hold of some profi pipes like you have. Next plan is to build a twin p zero hydro, imagine the squeal! I used the pull start version, got rid of pull start, made a pulley to start engine. I have a solid brass flywheel, and hex screwed onto crank. A grub screw holds in the flex.

Cheers, Sam.

 

[Amp Eater]

Sam good to hear from you

, ah hah I should have used my smaller prop it seemed too good to

be true all that rpm you had. All the same a base line run with the stock prop was good medicine

to sort out my next step.

Thank you for sharing some details!

I didn't want to put stress on the crank pin being much smaller in dia. compared to using a starter wheel

on the crank with the two bigger bearings for support. Your large hex bolt is taking things out of

balance perhaps you can source a grub screw to reduce spinning mass on the single rear bearing.

Good to have some flywheel weight my aluminum flywheel is asking for trouble once the prop cuts loose.

Mecoa in the USA sells a back plate for your engine should you desire to use traditional starting.

The back plate is for their Fuji .05. it fits perfect. I used an AP Hornet .09 carb gives great clearance.

To my Knowledge there are only 3 of us in the world so far using the Picco .05 for outrigger hydro's

Your idea to make a twin with Profi pipes would be a real treat to see in action. Is that a 2.2mm

flex drive? Go back a page you will see a vid I posted of the guy in France. Do you have any

more running vids? I will post vids as I progress with my tweaking of the rigger. I want to go out

this weekend to test the cut down X430. I plan to move to the right of the shore line and stay up

close with tight turns rather than going so far around the time trap gate.

 

[Amp Eater]

Oct. X427 Low lift prop

Oct. 1427 Medium lift prop "more lift at the tips"

X427 weight at (3.4g) was used in the 1st run / comparison to modified 1427 at (2.8g)

Second pic shows notable surface area difference on the lower blades.

The finished modified prop to be tested with video this weekend.

 

[shoboat]

Brad,

The 1427 has a lot less blade area down low towards the hub than the X-427.

You really need a 1430 propeller if someone makes them? The trailing edge

on both propellers could use some material removal. Down low on the trailing

edge from .1 radi to .4 radi does not do too much but load that little motor.

If you need some propeller help let me know, I would be happy to help you out.

Too bad ABC Propeller does not make any smaller 27 mm to 30 mm propellers

in the "Game Changer" Series.

Thanks,

Mark Sholund

 

[Amp Eater]

Good morning Mark,

Yes the lower pitched area had to be removed, I don't plan on

idling around and jumping back on plane so the extra bite is

just dragging down the top end speed. It would be nice to have

a steel prop in the smaller sizes to get away with a thinner blade.

I look forward to getting in the 1.8P and 1.9P props to rework

those will truly give the rigger a jump up in top end speed. As

luck would have it I had the medium lift 1427 on hand to mod out

for this weekend a "pacifier" that will at least have the tail running

on the prop hub. The stock x427 was not climbing out of the water

just simply not enough torque to over come the load. I hope to

get 36k with the modified 1427 best pass last weekend was 28k.

The end goal is to preen down the high pitch props to get the engine

unloading closer to 39k. The Picco is a screamer hits close to 50k on

the bench.

Here is a pic of the two stock props and the modified for comparisons.

Regards,

Brad

 

[Amp Eater]

Honorable mention:

The Octura 5M x.062 wire drive coupler is a perfect fit for the Picco engine

as it has a bare 5mm area to slip the coupler past the threaded 4mm portion

should you just want to use the pull starter. Weighs in at 17.1g in conjunction

with the drive line and prop provides enough spinning mass on launch.

 

[Amp Eater]

The Octura 1.25 came in the mail here are the results.

Modified per my 1980's style Viper cut: 1.8 x 30mm / 3.4g

Has a tooth to bite and compress the water for a spanking of 1.8P.

Hub is longer than the rest adding weight, after cutting down the blades

it matches the mass of the X427 / 3.4g but much less blade area.

Hope prop walk stays in check we will see this is an aggressive prop

for a wee 1/2A engine. So now have 2 new props to test

Back in the day around 1978 I would use Tee Dee .051 engines in my outriggers

the weight wasn't bad considering the larger servos, AA batteries and receiver.

I would use a throttle sleeve to keep the rpm's down till launch and to dock the boat

after a 1oz tank was spent. Speeds up to around 25mph, the smaller JG metal 1/2A

props would be cupped and tweaked at the tips for more lift. Originally a sub surface

prop. Later I went with the Cox Queen Bee as the integrated rear induction RC carb

made things nice along with the extra torque kept launches fuss free.The 3 point riggers

would get up on the prop and snap and snarl around the pond making for a site to see.

 

[Amp Eater]

Been windy here will try again today. I have two more props to add in the mix.

The small one Octura 0930 for 41k on the water cut to 0923.5
I tweaked it for some lift and shaped it for surface running.
1.062 pitch stock, I have it near 1.2

The other a X632 has a type of bar cut to allow unloading
at the hub that in turn provides good rake for a tighter thrust
cone. I shaped it for speed and thrust almost retaining all it's
original dia. X631 med. lift prop.

Engine puts out 49,903 rpm static as of Saturday.

 

[Amp Eater]