SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
SkyCadet's blog
Archive for June, 2010
Posted by SkyCadet | Jun 18, 2010 @ 02:37 AM | 3,023 Views
I am going to make up this very sexy looking plane, but modify it to use a Park 450 BL outrunner in lieu of the stock Speed 400 motor.

I am awaiting some Tru-Tech spinners [purple anodized to match! ] for my plane, so the inner cowling mod will have to wait until I can verify dimensions for a good fit. The power system I'll be using is the Park 450 w/ Eflite 20A ESC, and a MAS 9x7x3-blade prop. Rx will be a Spektrum AR500, and the servos are HiTec HR-55s.

While waiting for the spinner(s) to arrive, I'll install the wing servos for the ailerons, and then do up the rest of the kit once the motor is mounted.

I did a static test on this system today (June 17/2010)

Park 450 BL Outrunner and 20 AMP ESC/dual BEC test results:

--------------------------------------------------------------------------

MAS (Master Airscrew) 9x7x3-blade prop:

TH% RPM AMPS Watts

100 8100 15.74 191.5 peak (165W peak after 6 minutes flying/13.7A max)
~90 7600 12.84 158W
~80 7000 10.40 133W
75 6400 7.80 103W
67 5820 6.12 83W
~60 5070 4.34 60W (during second test run)
50 4660 3.41 40W average during extended run (6min)
40 3930 2.18 32W
33 3390 1.51 25W
25 2700 0.95 18W
~10 2070 0.49 10-12W

Here's the final Watt's up meter data:

Vm = 11.77 V
Ap = 15.99 A
Wp = 193.5 W

0.543Ah consumed after 6 minutes at 40W/50%, plus 2 minutes for above measurements.

Run#2
0.948mAh when...Continue Reading