Registered: 08/03/01
Posts: 7756
Loc: Lawrenceville, NJ, USA
Quote:
Originally posted by Mobycat:
Quote:
Originally posted by MattyX: [b]Ergo- plane travels 120 KIAS, conveyor goes 120 knots, wheels spin at 240knots until liftoff.
Then it's an infinite acceleration.
The plane is not travelling at 240 knots in air speed (assuming that's what KIAS is). It's travelling at ground speed relative to the conveyor belt. It's not moving in airspeed.
At some point it WILL hit it's limit. Engines don't have an infinite speed.[/b]
For the LOVE OF GOD! PLEASE!
The air speed has NOTHING to do with the conveyor belt...
Every one HAS to absorb this.
Ground speed of the plane is not different on a conveyor belt, any more than it would be different taking off from an aircraft carrier, or a train, or launched from a B1, etc.
Ground speed is relative to the planet...not things running about under you.
Otherwise...a plane's ground speed would be different if flew over a river ...but it ISN'T.
A Plane's AIR SPEED DOES change if there's a head wind, or a tail wind...as the AIR its flying through IS the relative baseline.
For ground speed, the relative baseline would be the planet, say by GPS coordinates.
We have GOT TO absorb this if we are to one day have every XOC member know if the damn plane can take off.
_________________________
- TJ
2001 Xterra '03 VG33, SE 5 spd, 305/70/16's, Revolvers, UBSkidderz, Doubled AAL's, 3"SL/2"BL, winch/bumpers, skids, sliders, OBA, Snorkel, pine stripes....
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