Buggy motors for air boats

[Andris Golts]

Im looking at putting together a Dumas Windy air boat .I was thinking what is the possibilty of using a .12 or .15 buggy motor with Maacs tuned pipe for this application this airboat is rated for a .10 aircraft motor my concerns are would trying to turn an airplane prop at 30'000 rpm would motor effienceny be washed away? What about the stress applied to the nylon prop? Any info would be good.

 

[Climate Models]

Simple advice.

Don’t even try it!

See that recommendation in the instructions for a ".10 sized aircraft engine” ? That should be your first clue.

Even in you do decide to try it, You will probably not be able to mount an aircraft prop on a buggy engine without some sort of custom prop hub adapter due to the buggy engines driveshaft.

If you could make it work, most buggy engines are designed for high RPM and have very little torque. Most likely the engine would not run well. (If at all)

Nylon prop? Make sure you call me before you try and start that thing. I want to make sure I am at least a good 100 miles away. Nylon props have not been used for years. Why? Because unless you temper them, they have a nasty habit of disintegrating in to multiple fragments that closely resemble tiny daggers.

I see the 2004 Darwin awards are out. You just might make the 2005 short list if you choose to ignore the previous advice.

Peter R.

www.climatemodels.com

 

[nitrotoys]

I have a brand new OS 46 will sell you cheep.

some minor dings on top of aircooled head,

Tom

 

[Rupert L Buttnuggett]

I say GO FOR IT!

A good prop will handle 30krev if you can get it there. The tuned pipe probably wont help much. If you plan on doing something silly........go all the way with it by dropping a couple hundred bucks on a good Trinity, or Serio .12

I run these motors in using a prop and they do push pretty well but they will run too cold without removing a substantial part of the cooling.

send movies!!!

 

[Buford L Buttnuggett]

Peter is right though......you'll spend a good bit of time trying to make a SG shaft work with a prop hub and spinner.

w

 

[Watercadet]

I think that "buggie" engines come with a standard threaded shaft like the airplanes. The engines that lean towords on-road cars tend to have the sg style cranks. So pick the right crank for a prop and sipnner and no prob. Nylon props are still very common in my experience at the LHS. APC makes a line of extremely aggressive props in nylon. The heat sinks on a buggie engine plus the added air flow from the puller prop would not allow the engine to get to temp though. I am currious as to how you could get a headder and pipe combo with a maccs pipe though. :unsure: The .12 or .15 that you would find in the LHS now would have much more power than the .10 that Dumas was talking about back in the day. Good luck!

 

[Propjockey]

Nylon props are still very common in my experience at the LHS. APC makes a line of extremely aggressive props in nylon.

APC props are injection molded fiber composites. However, several companies DO make glass filled nylon props with the 'nylon' being nylon resin...the bonding agent.

I think the props Peter is thinking about are the older unreinforced nylon...definitely NOT recommended.

As for the RPM factor, I have a 1/2 A Pylon racer that spins a 4.5 x 3 Tornado at 27,000 +!