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Originally Posted by paul svec
Trevor,
I don't think a tunnel is needed. Just put some sort of "sub floor" between pipe and Styrofoam ( so the foam doesn't melt) ...otherwise you will need a huge opening on the bottom to get hot air out....much larger then what you have now...  |
Oops... too late... I stayed up late last night and I am 80% done building a 3-sided tunnel for the pipe....
I'll post some pictures tonight, but based on the amount of material removed from the airframe and the amount of balsa added for the tunnel, I will add on 20 grams of weight!!!
Not bad... that leaves me with 40 grams left of wood I can add for the tank and electronics mounts to stay at the 27.8lb finished weight!!
Cheers
Trev