How many of us are also RC pilots?
Joined: Jul 2003
Posts: 32
Likes: 0
From: UK
New Forum? Plus some Technical Stuff
This subject could be the basis for a new forum. Certainly, there is obviously a lot of interest in the subject.
Back to the subject. I have designed an aerobatic model with a very thick symetrical aerofoil section, with a very rounded leading edge, very light, under three pounds with a wing area of 720 sq in, (48 in x 15 in), with an OS25 powering it. It flies with very little speed differential in all attitudes, since drag builds up as it flies faster. It performs very well.
It has lead me to think- just how thick, and how blunt a leading edge could an aerofoil section be, before it's not capable of lift??
Back to the subject. I have designed an aerobatic model with a very thick symetrical aerofoil section, with a very rounded leading edge, very light, under three pounds with a wing area of 720 sq in, (48 in x 15 in), with an OS25 powering it. It flies with very little speed differential in all attitudes, since drag builds up as it flies faster. It performs very well.
It has lead me to think- just how thick, and how blunt a leading edge could an aerofoil section be, before it's not capable of lift??
Joined: Apr 2001
Posts: 142
Likes: 0
From: Around the World
A friend of mine constructed a 3-D aeroplane. It looks a bit like the Modeltech Magic, but it is bigger (64 inch wingspan). When I saw the wing, I thought it would never fly: a very roundish leading edge, I would estimate about 5 inches (!!!!!) and then the upper and lower airfoil going straight back to the trailing edge, fully symetrical.
I think he used one of these tubes, which FedEx, UPS, or DHL are using, to shape his leading edge.
The model (I call it IKEA-Magic,
) is powerd by a Saito 72, 4-stroke) is the proof, that what we learn in aerodynamics is all wrong... 
It lifts off after 5 feet groundrun and does all kind of wild 3-D stuff.
I think he used one of these tubes, which FedEx, UPS, or DHL are using, to shape his leading edge.
The model (I call it IKEA-Magic,
) is powerd by a Saito 72, 4-stroke) is the proof, that what we learn in aerodynamics is all wrong... It lifts off after 5 feet groundrun and does all kind of wild 3-D stuff.
Joined: Jul 2003
Posts: 100
Likes: 0
From: Reading
Hi all RCers,
I fancy trying to build one of these :
http://www.angelfire.com/blues/heli_project/
for a laugh. I only want to buy the rotors (can't really be bothered with trying to build a matched pair), the only thing I can see difficulty with is the swash plate.
The chap has a diagram on his website on how he built his, but its not very clear, and any search on the Internet on how a swash plate works, and is constructed didn't reveal very much. Is there anyone out there who has information like this - it would be good to try and build one as it would seem to be the most technical part of the project (the tail rotor is controlled by a separate motor).
Any help would be greatly appreciated.
Cheers
(P.S. if I've hijacked the thread, sorry.....
)
I fancy trying to build one of these :
http://www.angelfire.com/blues/heli_project/
for a laugh. I only want to buy the rotors (can't really be bothered with trying to build a matched pair), the only thing I can see difficulty with is the swash plate.
The chap has a diagram on his website on how he built his, but its not very clear, and any search on the Internet on how a swash plate works, and is constructed didn't reveal very much. Is there anyone out there who has information like this - it would be good to try and build one as it would seem to be the most technical part of the project (the tail rotor is controlled by a separate motor).
Any help would be greatly appreciated.
Cheers
(P.S. if I've hijacked the thread, sorry.....
)
