I fixed the info on Baku and that's a good sketch too, though i'm going to try on symbols soon. Atm i'm in a bit tired but i'll work as good as I can. Let's see, the sails are a good idea. two sheets would stabilize it, but what if a strong wind gave the other sheet more air? I think it's would be a bit instable as you only use one parachute cause several parachutes would make you "go with the wind" so to say.
How will the sail be maneuvered? Will, in any way, the sail contribute to balance in the air, otherwise I think it's good for sailing. What's steering it? Rudder, sail?
*Edit: I meant "sheet" as in leather sheet, not sail

Sorry.*
When I look at the boat I can't help but think that's a great idea, though I do sketches you're able to take them to a new level. Ok, let me get this straight--->The sail lies on the ropes, tied to the pole thingy holding up the the sail
---> When you're out on the sea you "loosen" up the ropes a bit and make it a sail
--->when you race down a cliff you simply make it a parachute by tightening the ropes, making the sail drawn towards the "front"
---> When in water you rudder the Glider with a simple rudder
---> Now, I want to know how you maneuver it in air, do you manipulate the ropes to pull the sail a different ways or is there something else you thought of?
Brilliant! 
How do you make these structures? I just can't believe I couldn't have added more detail to my works.(As i'm a sketcher I'm always curious on how to learn new techniques or methods

). I don't want a tutorial, it's personal^^ I just want to know if you study in on your ideas cause I never do.
I still think the idea of having one sheet in the middle would be more stable, but that's just me
