400F Motor

We've tested this motor at 3.9 gear ration which shows a conservative amp of around 4 on a 7.2 volt setup and a fairly large prop with a thrust of around 8 oz's up to 9 amps and 22 oz's of thrust at 11 volts.

All test were performed on a stationary stand. Since the amp draw is so low, I recommend a very large prop for this gearing - 12 inch or even 13 inch would work.

Tech Info

400F Brushless Motor

Customer Videos and Pictures

After seven years, my Clancy Lazy Bee is now electrified. I used a JustGoFly 400F brushless outrunner, geared 3.9:1 with an MTM gearbox swinging a 11x7 prop, a MTM 25A ESC and a TP2100 3S Lipo pack. The combo pulls around 8A and gives a thrust of ~21oz and a calculated Pitch Speed of ~35mph. The flying weight is 32 oz. The gearbox made for a bolt-on installation. The Lipo is placed on a tray at wheel level and is accessed thru a door in the fuse. Since the electric power system weighs ~7oz (compared to the weight of the OS .15 system of 11 oz), added noseweight was needed for airplane balance. The Dave Brown 4" foam wheels weighed some 2.5 coz total, gave additional prop clearance and added to the funky appearance of the eLZBee. I also relocated the servos and receiver 5" forward to achieve the required balance. The test flight was under less than ideal conditions with winds gusting to 10+ mph. The plane performed adequately: it had a strong takeoff roll 10+ and climbout, and had no trouble penetrating into the wind. With the light wingloading, slight elevator mis-trim and slight tailheaviness it was a handfull to fly, but the power system was more than adequate. Full throttle was 8A and an easy part-throttle was 3A, which suggests a flight time of 30+ minutes with the 2100mAh Lipo.

Email: Bill Harris

400F Motor Info 3.9:1 gear ratio

Motor	Gear ratio	Prop diameter (inches)	Prop pitch (inches)	Prop make & style	Voltage at esc	Thrust (g)	Thrust (oz)	RPM	Amps	Watts	Thrust (g/W)	Pitch speed (MPH)
400F	3.9	10	4.7	GWS SF	7	216	7.6	3630	3.82	27	8.1	16.2
400F	3.9	10	4.7	GWS SF	8	280	9.9	4080	4.78	38	7.3	18.2
400F	3.9	10	4.7	GWS SF	9	338	11.9	4500	5.35	48	7.0	20.0
400F	3.9	10	4.7	GWS SF	10	421	14.9	4950	6.21	62	6.8	22.0
400F	3.9	10	4.7	GWS SF	11	497	17.6	5340	7.10	78	6.4	23.8
400F	3.9	10	6	GWS HD	7	192	6.8	3720	3.67	26	7.5	21.1
400F	3.9	10	6	GWS HD	8	249	8.8	4140	4.32	35	7.2	23.5
400F	3.9	10	6	GWS HD	9	301	10.6	4620	4.90	44	6.8	26.3
400F	3.9	10	6	GWS HD	10	358	12.7	5040	5.61	56	6.4	28.6
400F	3.9	10	6	GWS HD	11	427	15.1	5460	6.42	71	6.0	31.0
400F	3.9	10	8	GWS SF	7	275	9.7	3420	5.53	39	7.1	25.9
400F	3.9	10	8	GWS SF	8	348	12.3	3810	6.38	51	6.8	28.9
400F	3.9	10	8	GWS SF	9	403	14.2	4140	7.50	68	6.0	31.4
400F	3.9	10	8	GWS SF	10	458	16.2	4500	8.42	84	5.4	34.1
400F	3.9	10	8	GWS SF	11	562	19.9	4860	9.78	108	5.2	36.8
400F	3.9	11	4.7	GWS SF	7	297	10.5	3450	5.17	36	8.2	15.4
400F	3.9	11	4.7	GWS SF	8	368	13.0	3840	6.11	49	7.5	17.1
400F	3.9	11	4.7	GWS SF	9	449	15.9	4230	7.08	64	7.0	18.8
400F	3.9	11	4.7	GWS SF	10	538	19.0	4560	8.10	81	6.6	20.3
400F	3.9	11	4.7	GWS SF	11	641	22.7	4950	9.20	101	6.3	22.0
400F	3.9	11	7	GWS HD	7	277	9.8	3510	4.82	34	8.2	23.3
400F	3.9	11	7	GWS HD	8	345	12.2	3960	5.82	47	7.4	26.3
400F	3.9	11	7	GWS HD	9	416	14.7	4320	6.38	57	7.2	28.6
400F	3.9	11	7	GWS HD	10	499	17.6	4710	7.31	73	6.8	31.2
400F	3.9	11	7	GWS HD	11	598	21.1	5070	8.41	93	6.5	33.6

400F Motor

Tech Info

Customer Videos and Pictures

400F Motor Info 3.9:1 gear ratio

Copyright JustGoFly