2 ms·
Jetstreams are hundreds of kph. Meaning groundspeed can be hundreds of kph off of airspeed. Meaning GPS is a very poor backup airspeed indicator.
by flerchin 3y ago
Jetstreams are hundreds of kph. Meaning groundspeed can be hundreds of kph off of airspeed. Meaning GPS is a very poor backup airspeed indicator.
- jimmaswell 3y agoIt's trivial to calculate true speed from altitude and ground speed. Is the altitude not reliable?
- mb7733 3y agoAir speed is relative to the air around the plane, not the ground.