|01-16-2003, 11:32 AM||#1|
RCC Supreme Contributor
I am: Andrew Coholic
Join Date: Sep 2002
Location: Timmins, Northern Ontario
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Since I am working on my first ducted fan job, and not knowing how the rest of you guys do things, I will share what I did for the DF Reaper I am building.
I got the plans for the Byroblaster Enforcer conversion, that uses a built up ply/balsa thrust tube that houses the Byron fan unit. It looked like a lot of work to me, and maybe not the ideal thing due to the interios still having to be glassed, the exterior quite bulky, etc. Never mind a hassle to build!
So, I did mine this way: I turned a plug to the proper dimensions from pine, and wrapped it with about 3 layers of 6 ounce glass cloth and epoxy (west systems) and let it dry. After removeing from the plug, the fan fits into the front end of the "cone" into a step I turned into the plug, so the interior diameter of the fan transitions right into the interior of the fibreglass thrust cone. The exhaust diameter is the same as the one called out on the plans, about 4 3/8". Now I also made a wooden ring to go up front that the fan unit fits into, fairing the outer edge of the intake into a smooth curve. I will cut two formers that will hold the glass thrust tube and glass them on, and they will bolt to the fuselage of the jet supporting the engine/fan unit solid.
The whole works was easy to do and lightweight yet ridgid. A lot less time than making the built up version!
Pics to come...
Andrew Coholic -MAAC #26287L
1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's...
if its got a wing or two and an engine - I like it!
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