300DF Motor

Pushers are for wings and Jets.

Tractors are conventional motors mounted on the front of a plane through a firewall or behind a mount.. Pushers are normally on the rear of a plane and they axle faces away from the plane/wing. Pushers with a C Clip can be mounted on the front of a plane and act as a tractor would - in front of a firewall.

This is a great little brushless motor that is very powerful. I run it both direct drive and geared. Direct drive you should not go larger than 5x4 prop, which will get you exptremely high speed. A GWS 400 gearbox or something that holds a 400 size motor is ideal for geared operation in parkflyers, or 3D planes.

Yes - this motor, although called a 300DF is 400 size !

This motor is available in 2.3mm for geared operation, and I have some 3mm bells for direct drive. 2.3mm is more versatile, but 3mm is obviously less likely to bend or break. I use a prop saver on all my pushers and in addition to saving props, will keep the shaft from bending.

Specifications

Max Current: 10 Amps.

KV: 2250

Weight: 29.7 grams

Shaft Diameter: 2.3mm

Mount holes: standard 16.5 & 19.5

We have done extensive testing on this motor and are really excited about putting it into action in some of our IFO's, Tiger Moths (can you say 3D Tiger Moth), PT-17, and any plane 12 oz's or less should go 3D !

The motor has been tested and works well with two and three LiPo cells in series. I like them on three LiPos !

A two cell runs between 6 and 8.4 volts. A three cell runs between 9 and 12.6 volts, depending on the state of charge. See the Tech Chart to figure out what type of performance you'll get with these motors.

Tech Info

300DF Brushless Motor

300DF Pusher - Brushless Motor

Customer Images

DDFWAJ - Kyosho Illusion with JustGoFly 300DF

I lawn darted my Illusion after about the third flight and decided I wasn't going to pay $70 + dollars for what I consider a weak EDF so... after looking around the shop I decided on a JustGoFly 300DF motor. The 300DF on a Thunderpower 3-cell 1320mah spinning an APC 5.25 x 4.75 prop produces a good 163 watt @ 15 amp.
Dennis

Micro Rafale Video by Mangognax

Click for Video

Here are pictures of the Radical R/C Mini Stick. It's using a 300DF JustGoFly Motor, 3s900 LiPoly pack, 6x4 APC prop. It has 11 amps static draw, unlimited vertical, 60 mph! The plane flies great! Most flying is
1/3 to 1/2 throttle.
Dave

This motor is just over half the weight of the Johnson 250 and only pulls 5.9A swinging a 4x4 prop on 3s LiPolys.

This light motor, because of the lower amp draw, let me use light weight batteries. So now I have a MSW 250 that only weighs 6.8 oz. With this setup the wing has full vertical and speeds about that of the MSW 250 with the stock motor (only pulling about 2-3 amps less).

The little I have flown this wing, the motor seems to be really good for the money.
Acer

http://speedwing.net/

300DF News

After much testing we have decided to raise the rating on this motor from 7.2 amps (11.1 volts) - 80 Watts, to 10 amps (11.1 volts) 110 Watts. This motor is a little powerhouse and after I pushed the same motor for more than a year over 10 amps, I feel very happy to raise the rating. It doesn't get hot at 110 Watts and runs like a motor much larger. I run it direct drive in wings, and geared in large and small planes.

Pushers and Tractor Motors available

Feb 20th - I just finished running some new direct drive numbers. This motor can handle 10 amps very well, but at 12 amps will get hot. I want to update the spec from 7.2 to 10 amps, but will first run a motor for 30 minutes at 10 amps to validate this claim. It seems the prop for high speed is 4.75 x 4.5. But if you trim back the size of the prop you will enable the motor to rev up the RPM more and trade some thrust for higher speed. I will run 4.1x4.1 soon.

300DF pusher props have proven to be spectacular. We ran one every night for an hour in a Wattage HyperWing. Actually I learned about wings with this motor and smacked it into the ground many times. I've broken props and sheared off the axle once. But this little motor totally kicks butt using a small prop direct drive. It is equally good with large props in a gearbox. So decide whether you want speed - 60+ MPH with a small prop or slow fly and 3D with a gearbox and large prop.

A buddy gave me the HyperWing since it flew like a brick. Fly it slow and it falls out of the sky, fly it fast and you could thread a needle with it. I was not a fan of wings. I thought I'd give it a couple weeks run and initially crashed it frequently. But now it is my favorite plane and is pushing me into very fast planes. My wing is 16 ounces, Hitec 555 Dual Conversion receiver, P35 Castle Creations ESC and APC 6x4 prop cut down to 5x4. The motor is setup to run close to 10 amps, but is running very cool. We rate it for 7.2 amps - so be wary of over amping the motor. But I do recommend you try it for a couple minutes and see if your motor and flying skills can handle the amps. Don't go over 10 amps, as you not only could destroy the motor and speed control, but will not get the same proportional increase in power. You turn the motor into a hot plane and trade amps for heat.

We have added Direct Drive data to our 300DF prop information. Check out that static pitch speed on a 5x4.3 !

Hit Next Gear Ratio or use the menu to see other charts.

Direct Drive

Motor	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)
300DF	7	3.5	GWS HD	7.2	250	8.8	9960	6.1	44	5.7	33.0
300DF	5	4.3	GWS HD	10.8	390	13.8	18600	8.2	89	4.4	75.7
300DF	5	3	GWS HD	10.8	355	12.5	19500	7.2	78	4.6	55.4

Feb 20th - new numbers run using MMM 25 ESC and APC props direct drive.

Motor	Gearing	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)	Comment	Kv	% NL Kv	K RPM
300DF	Direct	None	0	NL	7	0	0	16500	1.2	8	0	0		2357	100.00%	16.5
300DF	Direct	5.5	2.5	APC	7	206	7.25	12500	5.3	37	5.6	29.6	This one achieves medium speed and lower amps with decent efficiency. 9 Amp looks wrong.	1786	75.76%	12.5
			2.5		8	255	9	13000	6.3	50	5.1	30.8		1625	68.94%	13
			2.5		9	312	11	~~16250~~	7.3	66	4.7	38.5		1806	76.60%	16.25
			2.5		10	361	12.75	16450	8.3	83	4.4	38.9		1645	69.79%	16.45
			2.5		11	411	14.5	17500	9.3	102	4	41.4		1591	67.49%	17.5
300DF	Direct	5.7	3	APC	7	206	7.25	12250	5.8	41	5	34.8	This prop looks like a good mix of thrust, speed and efficiency.	1750	74.24%	12.25
			3		8	255	9	13500	6.9	55	4.6	38.4		1688	71.59%	13.5
			3		9	305	10.75	14750	7.9	71	4.3	41.9		1639	69.53%	14.75
			3		10	347	12.25	15700	8.9	89	3.9	44.6		1570	66.61%	15.7
			3		11	397	14	16600	9.8	108	3.7	47.2		1509	64.02%	16.6
300DF	Direct	4.75	4.5	APC-CF	7	135	4.75	12360	5.4	38	3.5	52.7	This prop for high speed, low thrust and good efficiency.	1766	74.91%	12.36
			4.5		8	170	6	13700	6.5	52	3.3	58.4		1713	72.65%	13.7
			4.5		9	198	7	14900	7.5	68	2.9	63.5		1656	70.24%	14.9
			4.5		10	234	8.25	16200	8.6	86	2.7	69		1620	68.73%	16.2
			4.5		11	269	9.5	17200	9.6	106	2.5	73.3		1564	66.34%	17.2
300DF	Direct	5	5	APC	7	156	5.5	11600	6.3	44	3.5	54.9	Low amps, very good speed, medium thrust. Not as efficient as 4.75x4.5.	1657	70.30%	11.6
			5		8	198	7	13000	7.5	60	3.3	61.6		1625	68.94%	13
			5		9	241	8.5	14100	8.7	78	3.1	66.8		1567	66.46%	14.1
			5		10	269	9.5	15100	9.7	97	2.8	71.5		1510	64.06%	15.1
			5		11	305	10.75	15800	10.7	118	2.6	74.8		1436	60.94%	15.8
300DF	Direct	5.1	4.5	APC WIDE	7	206	7.25	10850	7.3	51	4	46.2	Very good thrust for 2S, 9.6v but not 3S. Efficiency decreases as voltage increases. This is a nice setup for 2S and not for 3S.	1550	65.76%	10.85
			4.5		8	241	8.5	11800	8.6	69	3.5	50.3		1475	62.58%	11.8
			4.5		9	284	10	12750	9.8	88	3.2	54.3		1417	60.10%	12.75
			4.5		10	298	10.5	12900	11.2	112	2.7	55		1290	54.73%	12.9
			4.5		11	312	11	13000	12	132	2.4	55.4		1182	50.14%	13