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Permalink Reply by Franco Nogarin on October 28, 2011 at 7:15am

I am no expert on this, but I think there are several factors:

1) Laws - restricted ceilings 500ft in USA I think

2) Altitude sensor if there is one, is most likely scaled and therefore its accuracy would  diminish as you get higher or lower than the scaling factor.

3) VFR - Pilots eyes, at 500 ft most quads are a dark dot in the sky making it dificult to navigate if you loose orientation

4) FPV - Signal range - I did tests that made it possible to fpv at a max range of 700 feet up and 3300 feet away using futaba 9c 2.4g and 5.8g Vtx in a suburb like setting.

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Permalink Reply by lorin.lund on November 2, 2011 at 12:02pm

A few years ago I bought a little retail RTF toy heli.  At that time I lived in a town whose elevation was 6000 ft.  The toy would get even 3" off the ground.  I presume it was because of the thin air.

 

Operating ceiling is a legitimate question.

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