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« on: April 21, 2019, 04:50:14 pm »
Hi Roger,
I bought a Rosetta about mid Feb this year and use it with SkyDemon. I already had a Ravpower 10,000mah power bank so decided to use this to power the Rosetta. Since then the Ravpower bank has worked without problem and at end of March I decided to see how long it would work (powering the Rosetta) from full before going flat.
So 29 Mar out flying for short flights but leaving the Rosetta plugged-in even when not flying it was on for 5.5 hours, from arriving to leaving the aircraft for the day.
A few days later an 'on' time of 1.5hours was added. Again a few days later the Ravpower was used to keep the Rosetta running for a trip to France and back 3hrs.
Finally the SkyDemon lost location data on another day (18 April) after a further hour of taxing and flying which I figured was a power problem and though I managed to start SkyDemon navigating for the landing I concluded that the power pack had not enough power to continue faultlessly.
Whilst disconnected the Ravpower bank was left in my hangered aircraft. When I was using my Ipad (a subset of the hours) the time was split between having my Ipad Mini 4 hardwired to my intercom for SD speech and latterly using a bluetooth dongle plugged into the intercom. Generally I would get to the aircraft, plug in the Rosetta and then do the walk round etc, listen to the ATIS and call for taxi so the Ipad was not connected wirelessly until I was about to taxi. The overall hours on for the Rosetta were determined by analysing the trk data using 'Aircrew'
So there you have it 10,000 mah = 11 hours powering the Rosetta. Of course nobody wants to run with the 'tank' empty
so 10 hrs would be more conservative for a piston engine bus driver.
I have now bought an identical Ravpower bank to keep as a fully powered spare.
Good luck with your project - it sounds exciting.
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