[kevinh]

Hi ya'll,

So in my RV I have a D-10A which I really like. I first flew the plane in 2005, and I've been thinking that I might need to replace the Li-ion standby battery. So I just did a capacity test, and the results were great! I'll keep flying behind this battery for a while longer.

Of course your mileage may vary, but here's the figures for my plane:

400 hrs on the dynon
Dynon ran on its internal battery for 3 hr 25 minutes before the warning about low backup battery started popping up. I stopped the test then, because my requirement was only 3 hrs.

 

[Dynon]

The remote compass draws negligible power. Probably in the neighborhood of 5% of the whole unit, so it won't make much difference to battery run time.

The reason all affordable AHRS units need a magnetometer is that the gyros inside are not stable enough to hold an accurate heading for more than a few minutes. It isn't feasible for us to just have you set a heading on the ground and then integrate that over a whole flight.