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t2o · 01-04-2009, 08:36 AM

8S2P
Century/HeliMax Kinetic 50
Century 600 Plus motor (1110KV)
Castle Creations HV85
14 Tooth Speed Up gear // 24 tooth Joker Pinion // Final Drive 9.82:1
600mm Stock Woody Blades
MCCPM Flybarless
Hyperion Atlas DS20X-TMD Servo
Collective = +14*/-14* /// Cyclic = Max'd out ~12*
RTF weight 8 lbs 12 ounces
Mastec 30 volt, 20 amp, variable DC power supply. I charge the pack @ 20 amps.

This set-up has really suprised me. The graph below shows 10 minutes at 1500 rpm; with this pitch range, flybarless head & head speed, the performance is brisk to say the least.

The A123 voltage will sag alot so give yourself plenty of head room where voltage is concerned. You can see that even in the middle of the pack the voltage dropped to below 17 volts, thats over 34%! but the head speed didn't budge. The strong point (IMHO) of the M1 cell is it's ability to provide amps and lots of em, NOT hold voltage. This setup with no load will deliver ~ 3000 rpm yet the workable head speed without to much bogging seems to be ~1800 rpm.

The spikes are straight up climbs and Drag runs.

I cannot speak to the longevity of the 600 plus motor under such conditions (over 2200 watts). I have only logged a handful of flights. The Century motor is only spec'd to 70 amps.

I plan on a gearing change and some 1300 rpm runs. I believe 14 minutes is not out of the question for non-3D flight.

Green = head speed
Purple = amps
Blue = pack voltage

01-04-2009, 08:36 AM	#4
t2o Registered Users Join Date: Apr 2008 Location: Hillbilly	E-K50 8S2P Century/HeliMax Kinetic 50 Century 600 Plus motor (1110KV) Castle Creations HV85 14 Tooth Speed Up gear // 24 tooth Joker Pinion // Final Drive 9.82:1 600mm Stock Woody Blades MCCPM Flybarless Hyperion Atlas DS20X-TMD Servo Collective = +14/-14 /// Cyclic = Max'd out ~12* RTF weight 8 lbs 12 ounces Mastec 30 volt, 20 amp, variable DC power supply. I charge the pack @ 20 amps. This set-up has really suprised me. The graph below shows 10 minutes at 1500 rpm; with this pitch range, flybarless head & head speed, the performance is brisk to say the least. The A123 voltage will sag alot so give yourself plenty of head room where voltage is concerned. You can see that even in the middle of the pack the voltage dropped to below 17 volts, thats over 34%! but the head speed didn't budge. The strong point (IMHO) of the M1 cell is it's ability to provide amps and lots of em, NOT hold voltage. This setup with no load will deliver ~ 3000 rpm yet the workable head speed without to much bogging seems to be ~1800 rpm. The spikes are straight up climbs and Drag runs. I cannot speak to the longevity of the 600 plus motor under such conditions (over 2200 watts). I have only logged a handful of flights. The Century motor is only spec'd to 70 amps. I plan on a gearing change and some 1300 rpm runs. I believe 14 minutes is not out of the question for non-3D flight. Green = head speed Purple = amps Blue = pack voltage Last edited by t2o; 01-09-2009 at 07:15 AM..