ST Motors

This motors are direct drive, very light weight, quiet and extremely powerful.

Review

Specifications

300ST Specs

Max Current: 7 Amps at 3S
Max Watts: 80
KV: 1200
Weight: 24 grams
Shaft Diameter: 3mm

400ST Specs

Max Current: 10 Amps at 3S
Max Watts: 110
KV: 1100
Weight: 38 grams
Shaft Diameter: 3mm

Power Usage: 2S-3S supported
please follow Watt Max for 4S setups

Tech Info

300ST and 400ST Brushless Motor

3D Motors
Great on Park Flyers, 3D or any plane 12oz's or less

Impressions of the 300ST

I unfortunately am not a 3D flyer. But I talk to flyers ALOT and learn from you guys what is best in a motor. This is ideal since we can't be the best at everything. So we came out with two light weight motors that can be setup for both 3D and parkflyer airplanes. Take a look at the REVIEW on the left of this page. Dave North did a very nice writeup on the 400ST.

Click pictures for larger view

400ST Charts

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)

Comments

400ST

DD

10

4.7

GWS SF

11.1

610

21.5

5820

15

167

3.7

25.9

Good on 2S Battery

400ST

DD

10

4.7

GWS SF

9.6

0

0

0

400ST

DD

10

4.7

GWS SF

7.4

459

16.2

4860

10.4

77

6

21.6

400ST

DD

9

5

GWS HD

10.9

650

22.89

8190

11.6

126

5.16

38.8

Very good 2S - 3S works but don't maintain full throttle for long.

400ST

DD

9

5

GWS HD

9.9

585

20.6

7770

10.3

101

5.79

36.8

400ST

DD

9

5

GWS HD

8.9

506

17.82

7290

9

80

6.33

34.5

400ST

DD

9

5

GWS HD

7.9

436

15.35

6720

7.7

61

7.15

31.8

400ST

DD

9

5

GWS HD

6.9

349

12.29

6150

6.35

44

7.93

29.1

400ST

DD

7

6

APC

11.1

454

16

9990

8

89

5.1

56.8

Great Setup for speed and duration.

400ST

DD

7

6

APC

9.6

361

12.75

8900

6.5

62

5.8

50.6

400ST

DD

7

6

APC

7.4

227

8

7200

4.5

33

6.9

40.9

400ST

DD

8

4

GWS HD

11.1

532

18.75

9980

8

89

6

37.8

Slightly higher thrust than 7x6

400ST

DD

8

4

GWS HD

9.6

420

14.8

8800

6.5

62

6.8

33.3

400ST

DD

8

4

GWS HD

7.4

275

9.7

7230

4.4

33

8.3

27.4

400ST

DD

8

6

APC E

10.9

445

15.7

7740

12.3

134

3.3

44

Very nice 2S Setup – 3S too hot !

400ST

DD

8

6

APC E

9.9

409

14.44

7440

10.9

108

3.8

42.3

400ST

DD

8

6

APC E

8.9

356

12.54

6990

9.4

84

4.2

39.7

400ST

DD

8

6

APC E

7.9

306

10.78

6540

8.1

64

4.8

37.2

400ST

DD

8

6

APC E

6.9

257

9.05

5940

6.7

46

5.6

33.8

400ST

DD

11

7

GWS HD

7.4

524

18.5

11

81

6.5

0

A little too hot on 2S

Dr Kiwi Charts

300ST Charts as tested by Dr. Kiwi

400ST Charts as tested by Dr. Kiwi

Click Charts for larger view