Question...

[BD-VX99]

No, lift is a function of air velocity (despite the wheels rolling at twice the speed). However, the conveyor would drag air with it and therefore create a small amount of wind in the opposite direction. I guess if you increased the speed enough you could drag enough wind to create lift but I highly doubt you you would ever be able to "drag" enough wind with the conveyor to allow the plane to take off (plus as soon as the plane gets out conveyor's wash it would plummit). Many automotive wind tunnels use moving floors and walls for the opposite reason (to simulate the walls being absent, and the vehicle moving at speed).

[volume311]

oh man I thought I was having a deja vu of a nightmare. There's an exact same thread over on NASIOC that was started yesterday and blew up to +1800 posts including MS paint diagrams and what not. Beleive it or not the debate is still going on.

For the curious
http://forums.nasioc.com/forums/showthread.php?t=891480

[mbeach]

I miss teh Nasioc OT. Sometimes.

Alan, where's that frequency? I'm getting some handhelds together for Caribou season and I want to get that freq on there as well.

[transio]

A plane's speed is generated by air thrusting devices (props or turbines). The wheels are freely rotating. A conveyor running opposite the plane will only double its ground speed, but will not significantly alter the air speed (I say not significantly because there will be some "drag" caused by the minimal friction of the rolling wheels. For the most part it's irrelevant though). The air speed is what is required for take-off.

Similarly, a plane in high headwind can take off at very low ground speeds. I've taken my model planes down to the airfield on very windy days and taken off almost without moving (relative to the ground).

Edit: Bleh, NOW I see BD-VX99's post.

[Triathlete]

Yes it can...



















































...if it is an AV8 Harrier! :yesr: :yesg:

[Bulldoggie]

[QUOTE=transio]A plane's speed is generated by air thrusting devices (props or turbines). The wheels are freely rotating. A conveyor running opposite the plane will only double its ground speed, but will not significantly alter the air speed (I say not significantly because there will be some "drag" caused by the minimal friction of the rolling wheels. For the most part it's irrelevant though). The air speed is what is required for take-off.

Similarly, a plane in high headwind can take off at very low ground speeds. I've taken my model planes down to the airfield on very windy days and taken off almost without moving (relative to the ground).

A conveyor belt would only spin the wheels twice as fast as the thrust would move the plane forward even without the wheels. Some planes use skis as an example

[Maugan_VX]

No it would not fly because the generation of lift is only possible with apparent wind flowing over the wing surfaces.

(unless its a harrier, in which case its a flying Microwave, or a North Carolina Lawn Dart)

[transio]

A conveyor belt would only spin the wheels twice as fast as the thrust would move the plane forward even without the wheels

I'm not sure if you're agreeing or disagreeing with me, but that's pretty much exactly what I said (or was trying to say).