Above is my Hydrofoam uses the same radio gear and motor as the fun fly I have not
flown/sailed/driven this as yet but was so impressed with the video i had to build
one. a report will appear here after testing. The plan is available in pdf format
which you can print out with the "markup lines" and stick together.
The hydro has now been test flown , it would not come off the ground, with a hand
launch it went straight into the ground, the engine was altered to have some upthrust,
this was better, with a vertical launch it sort of flew but was completely uncontrollable
constantly rolling right, it flew for around 20 seconds before crashing (see left).
The conclusions i have come to is that it needs left thrust , up thrust, building
in 6mm depron instead of 3 to create a more rigid structure, I also slightly increased
the rudder and tailplane area and added an extra fin in the middle, i also got rid
of all the silly tabs on the plan except the ones connecting the fins to the hull
in favour of glued seems, this was far easier to build. The new plane has been built
incorporating all these changes and is ready to fly (see below).
I have now flown this and although far better than the original it is still unstable
and extremely difficult to keep in the air. The 6mm depron was strong enouph to fly
with no carbon fibre but not strong enouph to crash. It has now been repaired and
stiffened with 2 carbon fibre spars at the front and back of the wing/hull and is
ready to fly again. I flew the plane in a strong wind i think it would be more managable
in calm conditions.
Left is my depron biplane it is rouphly based on a scaled down panic although i guessed
this from memory and made the aerofoil sections semi symetrical. It is highly aerobatic
and prop hangs very well. It also flies fine but much quicker without the top wing.
This is a 88 3/4" span depron glider. it has a polyhedral wing and is rudder elevator
only,The whole airfram weighs 6 ounces. i calculate this will have under 3 ounce
/ sq ' wing loading, I have designed this for flying off the slope when there is