Thread: Build Log MIG 31 FIREFOX scratchbuild
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Old Oct 05, 2012, 05:01 PM
wind1234 is offline
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United States, OH, Fairborn
Joined Jan 2012
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Originally Posted by CoolerByTheLake View Post
How will you cool motor?
How will you start it?
Alignment of mutiple shafts? Bearing Blocks?
20%-30% nitro fuel--will it melt foam?
Engine will need to exceed that of both electric motors combined+ extra for lose due to friction in shafts, bearings, belts/gears.
the motor will be out of an rc truck ( k4.6 out of a savage ss 1/8 scale)
pull star tor roto start i got 1 of each if i need to save the weight..

will be air cooled with the tuned pipe routed somewhere? lol that will be the easy part..

yes fuel would definatly eat some foam..i will be making a mold out of the main body and making a composite hull ect.

getting all the connections figured out is what im working on now....
what would be the litest way to connect the fan blade to the teeth on the cluchbell....
basicly i need to attach 2 spur gears too 2 shafts and line them up on the cluchbell..doing it this way tho the fans could only go directly behind the motor...

i thought about using the flex shafts that are in the rc boats for a wider placement option on the fans......

for me the hardest part will be attaching the spur gears to the driveline..after that just need to fabricate a plate to mount everthing to keep it rock solid for testing.....: )
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