Years ago there was an article from an aerobatics instructor flying - eat Bananas before aerobatics. They have carbs and taste nearly the same coming up as they do going down.

More eye candy video from the October Evo recurrent training/fly-in [youtube]https://youtu.be/DNorF0NSTWI[/youtube]

N!ce.
Are you making friends with that new ride?

Oh my yes! I've got about a hundred hours in it now, and at my annual recurrent training last month the CFI really had to pile it on to push me out of my comfort zone. I've gone from feeling like I have a tiger by the tail to feeling like a horse and rider as one. It still leaves me grinning with every flight.

OK, this is just funny.
As mentioned on another thread, instead of conventional lead-acid for the Evo's 2 ship's batteries we used lithium batteries from EarthX. A problem was that output from the 250-amp generator, split between the two batteries, would have been more than the EarthX batteries would accept, so the easiest solution was just to double up to 4 batteries, each seeing 1/4 of the generator's output. That's still lighter than the lead-acids they replaced, and gives us plenty of back-up battery.

"Plenty" may be an understatement. Recently, in testing the "Emergency Load Shed" button on the touchscreen, which cuts non-essential power draws to maximize battery power after a generator failure, we left it on to see how long it actually took to drain the batteries. To prevent damage to the batteries, EarthX says their circuitry will cut them off when they drop to approximately 22v. We didn't wait that long, we stopped when they hit 23.6v, which took ... over 8 1/2 hours!!! Plenty, indeed! And the G3X and GTN have their own, separate, stand-by batteries which lasted another almost 2 hours.

We'll probably add some "nice to have" items to the "Load Shed" button's list of essentials.

Nice! I want one of these bad but I’m afraid of stepping into the turbo prop world even though it would be perfect for my mission. Very nice plane!

Yes, that is funny. I'd say you have some headroom to work with there!

I assume you have freon AC? If so, is the compressor run from the engine or from an electric motor?

If by an electric motor, it would be interesting to see how long you can "ground cool" before you jeopardize your power available for starting.

What if you lose a battery cell in normal ops? What protects the system from sending too much current to the remaining batteries from the generator?

In my plane, the AC compressor is run from the engine, as on most Evos. A few have electric AC, especially in the South where being able to ground cool before engine start is especially attractive, but I didn't want the effect on CG.

A single bad cell is handled by the EarthX BMS, you'd have to ask them for the details. If a whole battery goes down, the 3 remaining batteries could handle 240 amps together, which is more than they would ever see, since normal system load is 30-40 amps. Even if they were somehow totally exhausted at startup, the starter/generator controller (SGC) ramps up the generator slowly so their resistance would increase gradually over several minutes before the SGC made full current available. The SGC is also the voltage regulator. In any case, the BMS will protect the batteries from damage.

I need to block this thread... I want one of these sooooo baaaad!!!!!

A single bad cell is handled by the EarthX BMS, you'd have to ask them for the details. If a whole battery goes down, the 3 remaining batteries could handle 240 amps together, which is more than they would ever see, since normal system load is 30-40 amps. Even if they were somehow totally exhausted at startup, the starter/generator controller (SGC) ramps up the generator slowly so their resistance would increase gradually over several minutes before the SGC made full current available. The SGC is also the voltage regulator. In any case, the BMS will protect the batteries from damage.

This. They pair up in series for 52v starts, then it's back to all parallel.

This. They pair up in series for 52v starts, then it's back to all parallel.

This. They pair up in series for 52v starts, then it's back to all parallel.