Hi,

In the Guillow's instructions they stipulate coating the outer surfaces of the balsa with dope, then sand lightly. Once I tried doping all the balsa surfaces and it seemed to really strengthen the frame but made the plane too heavy for rubber powered flight.

My question is... When converting a Guillow's kit to free flight (.049 engine) wouldn't the extra weight of doping more surfaces be fairly insignificant compared to the benefits of the added strength?

Does doping even really add stength (or am I imagining it)?

Has anyone done this with a Guillow's kit before?