Tunnelstuff in Norway

Discussion in 'Outboard Forum' started by Joern Markset, Aug 19, 2017.

intlwaters.com

Help Support intlwaters.com:

  1. Aug 19, 2017 #1

    Joern Markset

    Joern Markset

    Joern Markset

    Well-Known Member

    Joined:
    Oct 25, 2004
    Messages:
    392
    Location:
    Songe, Norway
    Went out to do some tweeks on my OS today. Had to modify the headbutton as it allows no tighter squish than 0,8 mm (0,32") tried with 0,28 mm who gave much better torque, but I had to open up to 0,33 mm to get some more revs. Also had a pipe extender made to get more bottom torque
    Next up will be the Nova Rossi, lets see if there is some power in this little bugger

    15.jpg

    14.jpg

    7.jpg

    8.jpg

    9.jpg

    10.jpg

    11.jpg

    12.jpg

    13.jpg
     
    Last edited by a moderator: Aug 21, 2017
  2. Aug 19, 2017 #2

    Ray Sametz

    Ray Sametz

    Ray Sametz

    Well-Known Member

    Joined:
    Nov 23, 2003
    Messages:
    6,641
    Location:
    Monmouth County,NJ
    Like the idea with the throttle servo. [​IMG] Very cool setup. [​IMG]
     
  3. Aug 19, 2017 #3

    Joern Markset

    Joern Markset

    Joern Markset

    Well-Known Member

    Joined:
    Oct 25, 2004
    Messages:
    392
    Location:
    Songe, Norway
    Thanks [​IMG] I was tired of the stiff cables...

    However it has not been 100% since I have broken 2 servos now because of water inside. I`m considering a claim to Savox as they are IP67 rated [​IMG]

    Now I open the new servos and fill them up with white grease before I mount them.
     
  4. Aug 19, 2017 #4

    LohringMiller

    LohringMiller

    LohringMiller

    Well-Known Member

    Joined:
    Jan 25, 2017
    Messages:
    343
    Location:
    Eugene, OR
    You have a lot of faith in how "water proof" servos are. Below is a picture of a "water resistant" servo after a radio box flooded when the boat was submerged. There are some very stiff push rod seals like the o-ring seal pictured below.

    Lohring Miller

    P1010426.JPG P1010437.JPG
     
  5. Aug 19, 2017 #5

    Robert Pickard

    Robert Pickard

    Robert Pickard

    Well-Known Member

    Joined:
    Dec 18, 2013
    Messages:
    2,695
    There is no such thing as waterproof servo, water resistant yes but like Lohring said take a look what happens, the boat might be upside down for a while and get water in the servo.
     
    Last edited by a moderator: Aug 19, 2017
  6. Aug 19, 2017 #6

    Joern Markset

    Joern Markset

    Joern Markset

    Well-Known Member

    Joined:
    Oct 25, 2004
    Messages:
    392
    Location:
    Songe, Norway
    I'm totally following you Have allways put a lot of effort in building proper radioboxes.

    The servos are clearly marked with IP67, and we all know what that means, so I wanted to give it a try

    The steeringservo has been ok for 3 years now, I don't mind replace a servo after 3 years duty
     
  7. Aug 19, 2017 #7

    brad nichols

    brad nichols

    brad nichols

    Well-Known Member

    Joined:
    May 10, 2010
    Messages:
    2,230
    Try Corrosion X inside the servos.

    Brad
     
  8. Aug 19, 2017 #8

    BradSpencer

    BradSpencer

    BradSpencer

    Well-Known Member

    Joined:
    May 7, 2009
    Messages:
    790
    Location:
    Australia
    Very intersted to hear how Rody's OS outboard engine performs once dialed in. I know in the RC car world the OS engines are higly regarded for there performance and quality over other brands, the reason why they are the most popular I guess. Rody has his pricing right on point as well.

    Keep us posted [​IMG]
     
  9. Aug 20, 2017 #9

    Jeffmaturo

    Jeffmaturo

    Jeffmaturo

    Well-Known Member

    Joined:
    Jan 20, 2015
    Messages:
    527
    Location:
    Bonita Springs, Florida
    That is a nice set up.....
     
  10. Aug 21, 2017 #10

    Joern Markset

    Joern Markset

    Joern Markset

    Well-Known Member

    Joined:
    Oct 25, 2004
    Messages:
    392
    Location:
    Songe, Norway
    I bought a new OPS 21 DAC some time ago, and this weekend it was tested.

    Headbutton has too big volume for 25% nitro, and I`m not sure if the ports are ideal for my kind of use.

    Will not spend more time on this as I have a bunch of other powerheads to try out.

    4.jpg
     
  11. Aug 24, 2017 #11

    Joern Markset

    Joern Markset

    Joern Markset

    Well-Known Member

    Joined:
    Oct 25, 2004
    Messages:
    392
    Location:
    Songe, Norway
    The OS VS PTO is running quite nice now. If I let it go on an oval track it screams like the devil itself.
    However our triangle course demands loads of power to pull the boat around the buoys and get up flying again.

    I had pipe extenders made, and that helps me a lot. Also tried to squish harder, but it has its limitation on 25% nitro, so 0,30 mm is ok.
    I`ve ordered 4 or 5 new pipes just to try out if I can gain more torque on low rpm, and I ordered a new piston/sleeve that should have a few degrees lower exhaust timing. Not sure yet, but I hope that will do the trick.
    Anyway it`s a really nice engine!! (It is on sale now, 305 euros) Link

    While I`m waiting for new parts to arrive I fired up the new Nova Rossi Keep .21M

    It`s quite similar to OS engine, except I did not need to modify the headbutton. Squish at 0,30 mm works fine on this as well.

    I have replaced the aircooling head on all my engines with watercooling jacket, and run without any watercooling. Unfortunately I don`t get the needed heat, and that is a challenge as well, makes it difficult to find the correct settings. I found OS P3 to be the best option...

    I had to reduce the propshaft to allow the use of Octura M435/3 that I found to be a **** nice prop for our drive style

    And I did some mods to an X437/3 that had been in the war, reduced it by 3 mm, and it works good. Andy is making a bucket with new props as we speak, hopefully there will be some good stuff when they arrive.

    BTW, the tunnel is a AN-660, Norwegian design by Andreas Nodland

    16.jpg

    18.jpg

    19.jpg

    20.jpg

    25.jpg

    26.jpg
     
    Last edited by a moderator: Aug 24, 2017
  12. Aug 24, 2017 #12

    BradSpencer

    BradSpencer

    BradSpencer

    Well-Known Member

    Joined:
    May 7, 2009
    Messages:
    790
    Location:
    Australia
    Great reading, thanks for the updates.

    The B2101 piston and sleeve are from a short stroke engine, The VS is a long stroke, so parts compatibility and port timing may be an issue. Rody would be the man to check compatibility with. The XZ-GT piston/liner or possibly the XZB spec II if you want extra low exhaust timing might be an option.

    If you need any measurements from a B2101 liner let me know.
     
  13. Aug 24, 2017 #13

    Joern Markset

    Joern Markset

    Joern Markset

    Well-Known Member

    Joined:
    Oct 25, 2004
    Messages:
    392
    Location:
    Songe, Norway
    I might be wrong when I mentioned B2101, sorry if I`m wrong.

    I buy all the parts from Rody, and it was his suggestion to try this one.
     
  14. Aug 24, 2017 #14

    bob miller

    bob miller

    bob miller

    Well-Known Member

    Joined:
    Jun 28, 2007
    Messages:
    979
    Location:
    tonawanda ny
    is your nova rossi ob water cooled , ? if air cooled , how do you prevent over heating....bob
     
  15. Aug 24, 2017 #15

    Joern Markset

    Joern Markset

    Joern Markset

    Well-Known Member

    Joined:
    Oct 25, 2004
    Messages:
    392
    Location:
    Songe, Norway
    It is freakin cold in Norway, it is almost impossible to get the correct temperature. That is why I took of the aircoolinghead and replaced it with watercooling jacket (without watercooling). Less heat disipate, but still can`t get it hot enough.
     
  16. Aug 24, 2017 #16

    Joern Markset

    Joern Markset

    Joern Markset

    Well-Known Member

    Joined:
    Oct 25, 2004
    Messages:
    392
    Location:
    Songe, Norway
    Here is another tunnel, it is a Noddcat designed by Kjell Gunnar Noddeland. It is without a doubt the most winning design in Norway for the last 25 years.
    This one is an old boat that I converted to electric with reversible option. It is actually sold now, I just have to dial it in so the customer will get a "turn key" boat.
    I allways recomend the OS 21 XM if they`r not experienced in glowengines

    30.jpg

    31.jpg

    33.jpg

    34.jpg

    35.jpg

    36.jpg

    37.jpg

    41.jpg

    46.jpg
     
  17. Aug 25, 2017 #17

    Joern Markset

    Joern Markset

    Joern Markset

    Well-Known Member

    Joined:
    Oct 25, 2004
    Messages:
    392
    Location:
    Songe, Norway
    Here`s another build that is almost ready for test. Hull is AN-790 (design by Andreas Nodland)

    Plan was to try the Nova Rossi .46 on this one, and I think it might be possible to check out the .67 as well. Gonna need some extra weight in front cause the .67 is a lot more heavy than the .46
    Planning for another bigger tunnel later that will have the .67

    The AN-790 has been previously used as electric, running 6S and motor with a maximum power at 5kw. (continius power at 2,35kw)

    Works pretty good even though the weight is quite high with electric setup.

    23.jpg

    21.jpg

    22.jpg

    24.jpg
     
  18. Aug 26, 2017 #18

    Joern Markset

    Joern Markset

    Joern Markset

    Well-Known Member

    Joined:
    Oct 25, 2004
    Messages:
    392
    Location:
    Songe, Norway
    I have several big tunnels resting on the shelf as well, including this Synthar previously owned by Marc Huider. Plan was to build it electric, but have not come that far yet, maybe plans will change, who knows...
    Gonna use the VP outboard on this one, hopefully one day it will fly high again.

    28.jpg

    29.jpg

    27.jpg
     
  19. Aug 27, 2017 #19

    Kris Flynn

    Kris Flynn

    Kris Flynn

    Well-Known Member

    Joined:
    Mar 12, 2002
    Messages:
    3,923
    Location:
    Cranbourne East, Australia
    Have you tried a thin gasket/spacer between pto and low unit to slow down the heat transfer/dissipation?

    Heat is certainly your friend! (Till a point of course)
     
  20. Aug 27, 2017 #20

    HTV Boats

    HTV Boats

    HTV Boats

    Well-Known Member

    Joined:
    Nov 8, 2006
    Messages:
    2,097
    Location:
    Cape Coral Florida
    You could pre-heat the water going to the head with a coil around the exhaust header. Another way is to wrap the exhaust pipe to keep heat in the pipe and returning pulses to the motor. Outboard pipes cool very quickly. (wind chill). I used to live in Minnesota so I understand cold weather, like just after the ice goes out and you've been waiting months to run a boat.

    Mic
     

Share This Page

arrow_white