Originally Posted by kyleservicetech
What kind of model airplane are you working on?
IMHO, a 40 minute flight for an electric model will be very difficult to accomplish. (Read as expensive) That would be more in the area of a glow or gasoline powered model.
Its a group project to design a plane that can take aerial pictures of a terrain. It will not be required to fly too quickly or perform any complex acrobatics just level constant speed flight for 40 minutes.