Originally posted by Wasp
arnt hurri and mossie frames made from woodand canvas anyways so would burn ??? maybe HTC took this in to account??
Dont think that explains it. Remember we're not talking about some irrelevant combustables -- these are the key structural componenets of the aircraft. Burning stuff doesn't just make a pretty light; it CONSUMES the material as it burns, so burning wood gets weaker every second. Add the stresses of flight, and wings should be falling off before the terminal explosion has a chance to happen.
Canvas on planes was treated with laquer based stiffeners to both strengthen and to minimize air flowing through the canvas pores (which would reduce aerodynamics). Laquer based = petroleum distillates = pyromaniac delight.
The best answer for the long burn times is simple -- "because that's how they programmed it." These planes should burn easier; for justification of why they burn longer, we'd have to ask HTC. To be honest, I cant think of why they would.
EDIT: BUT I am not AT ALL a aeronautical engineer type. There are MANY far better brains than mine for these questions, I'm just confessing ignorance, not throwing down a challenge.