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My latest A123 aerobat is a power-90 motored Funtana with 33 volts. This 11 pound aircraft has a flight time of around 7 minutes which is about 60% capacity of the 9S2P A123 battery. 1600 watts and 63 amps of smooth, quiet power using a 15x13 3-blade prop. Charge times with two TP110 chargers is around 15 mins. ESC is a CC 100 ICE which is a perfect match.
MGB1977Red 1 year ago
I left the A123 batteries connected to the esc for a week. When I checked the voltage for the 6 cell pack it registered only 2 volts!!!! I charged the A123 pack back up to 22 volts and it runs just fine. Amazing!! Try that with a lipo.
MGB1977Red 2 years ago
My favorite acro plane at the moment is the Hyperion Cap 232 with a Power 25 and 4 A123s. This is a very attractive aircraft with plenty of performance. I'm surprised that the thin wing has so much lift and the big ailerons when used with flaperon mixing really slows it down for landing. Bigger and heavier than the Showtime, it's a very nice flying machine with impressive aerobatic manners.
MGB1977Red 2 years ago
I've had so many flights on this 'plane that I've noticed the power falling off with the power 10 motor. How could this be...electrics are forever! Then I read that the rare earth permanent magnets in the motor can slowly loose their power. I swapped out the 15 and put the 10 back in and used the 12x8 prop that I was using on the 15. Presto... I was getting the performance that I had when the 10 was new. Nothing is running hot and flight time is the same.
MGB1977Red 2 years ago
I'm now using an e-flite power 15 motor with a 13x8 e prop and performance is much improved over the power 10. Still 7 minutes of flying time but much stronger vertical. It may look tame but it flies FAI turnaround pattern maneuvers very cleanly. A new maneuver: A rolling square loop with 2 points of a 4 point on every leg. E-Flite 40 esc and 14.6 volts of A123 cells. A superb combination!
MGB1977Red 2 years ago
The Mini Showtime always looked too short coupled to me so I moved the stabilizer back 1.25 inches. There's plenty of room on the fuselage and I just had to nick-out the elevators a smidge to clear full throw rudder. I think it performs square eights and Square Loop with Rolls more precisely now and all the other maneuvers are the same as before. It looks more F3A now. I'm thinking about going to a Vanquish with a Power 25...but that's a larger airplane with a pretty small wing.
MGB1977Red 3 years ago
I make the ailerons into flaperons on all my aircraft, even biplanes. I have a landing switch on the xmitter that droops the ailerons 15 degrees for landing approach and then the retract switch is used to dump them down to 30 degrees for touchdown. 30% aileron up and down is coupled with the elevator to square up the corners and delay tip-stall. It's a great way of modifying the airfoil in flight and it's free!
MGB1977Red 3 years ago
Awesome flying!! Congratulations ;-)
frankoi31 3 years ago
I'm using a Thunder Power 1010c charger now that charges this pack at 10amps! It now takes around 12 minutes or less to charge up. Being able to update the charger with new A123 settings is really helpful. Remember to put the charger Update into the folder with the driver files (like "slabser") so the update .exe can find the rest of the files to do the update.
MGB1977Red 3 years ago
I use A123 2400ma lithium nano-phosphate batteries in this Showtime. I get 8 minutes of aerobatic flight time and use only about 1500ma from the pack, which charges up in 16 minutes at 6 amps. I never balance charge and the pack rarely gets more than warm. This is an ideal setup: 400sq. inches of wing area, E-Flight Power 15 and 4 A123 cells
managed by an E-Flight 40amp speed controller. I just build the battery pack into the airplane because there is no need to ever remove the pack!
MGB1977Red 3 years ago
I see you enjoy the showtime as much as I do. Great plane.
ekraja11 3 years ago
Aerobatics at this altitude is a real test of airfoil design. The electric motor doesn't care about thin air but adequate lift is sure hard to find. Notice the mountains in the background...they're 14ers!
Speed is higher because of thinner air and I can usually go up at least 1 size in pitch for the propeller. The mini Showtime isn't designed for precision aerobatics but does pretty well with this the E-Flite Power 15. Flight time is 8 to 9 minutes and weight is 2 pounds.
MGB1977Red 3 years ago