rogueqd wrote:Why Ground Speed? I would have thought that would just confuse your air speed estimates?
Using GPS you can only monitor the aircraft's speed and as such you have no idea of airspeed at all. Having said that I knew into the wind I was getting around 30klm per hour and 60 with the wind but it's an indication that you are not going to stall. You can't hear the motor because its too far away and from the visual speed you are getting on the screen you can't judge if the model is about to stall. Obviously once you start to stall, flight surfaces don't work anymore so the model doesn't respond, then the pilot (me) panics. When climbing etc you can monitor your ground speed to determine that you are not slowing down and about to stall.
I actually find I use it more when landing, having said that I'm pretty sure an experienced FPV pilot would be able to judge purely based on the visual on the screen. I liken this to a New RC pilot who gets confused as to which way the model is facing etc.
Well that's my logic and the model is still in one piece and no mishaps. Once I get a few more hours of FPV under my belt I'll be able to provide more info on what I think works.