ORIGINAL: flyX
That last i check lift is lift..
that thing call a rotor ...is a wing...
that thing mounted on the front of your model that you call a prop is a wing
okay...why do you take off up wind instead of down wind ?
why dose it take longer for the model to lift off of the ground when taking off down wind ?
and how come your model wants to gain altitude when flying into a head wind ?
Not to offend you but.....
Look in a physics book... you are wrong and giving mis-information.
Also Helis and Airplanes are 2 completely different methods of flight and really cannot be compared in most aspects. Wind speed does affect heli's, but in a much different way.
-Yes the rotor is a wing what creates lift with rotor speed which translates to air speed moving over the blades... no power = no lift, no forward motion required. You can fly a heli with no ground speed because it is the rotor speed that translate into lift.
-The prop is more or less an airfoil, but if you want to call it anything it is an airscrew... By it's plane of motion and design the prop creates thrust, not lift. The engine turns the prop, the thrust of the prop pulls the plane, thus creating airspeed over the wing which translates into lift.
-If you take off up wind, ground speed (+) wind speed equal more air speed which translates into more lift on the wing. This means your take off takes less distance to gain flying air speed over the wing.
-If you take off down wind, ground speed (-) wind speed equal less air speed which translates into less lift on the wing. This means your ground speed must be higher to overcome the wind speed to create lift (you are staring with a wind speed that is actually negaitve). So it takes a lot more distance to get the wing to flying air speed.
-The model wants to gain altitude bcause of air speed, not ground speed. The wind speed over the wing increases lift when added to the ground speed (same as on take off) and translate to more air speed, not ground speed.
Just do some reseach online, this is by no means a new science and it really is not a complicated as people make it in their minds... Just the Caveman in us all I guess.
