More power to you!!
Genesis of LMR & HPR.
USR 40 E 10 liftoff at daybreak in a Space Shuttle model.
USR 20 D 5 or 20 D 16 compared with Estes 9 C 6 motors.
Estes 18mm motors are the most popular solid
rocket motors in the world by a large margin.
18mm SU USR 40 E 10 (E10-8) seen in the wild!
| 18mm Expendable Solid Rocket Motors | |||||||
| Motor | Dimensions | Thrust Pounds |
Time | Power | Propellant Weight |
Grain | Cost |
B4-2,4,8
 |
0.69 x 1.75" | 0.9 | 1.25 | 5 Ns | 5 g | E | 5.95 |
C4-2,4,8
 |
0.69 x 1.75" | 0.9 | 2.5 | 10 Ns | 6 g | E | 6.45 |
D5-0,4,8
 |
0.69 x 2.75" | 1.1 | 4.0 | 20 Ns | 12 g | D | 6.95 |
D16-0-4,8,12
 |
0.69 x 2.75" | 3.6 | 1.25 | 20 Ns | 12 g | D | 6.95 |
E10-0,4,8
 |
0.69 x 4.75" | 2.2 | 4.0 | 40 Ns | 24 g | D | 10.95 |
F15-0,4,8
 |
0.69 x 6.75" | 3.3 | 4.0 | 60 Ns | 30 g | D | 14.95 |
F20-0,4,8
 |
0.69 x 8.75" | 4.4 | 4.0 | 80 Ns | 48 g | D | 19.95 |
G30-0,4,8,12
 |
0.69 x 12.75" | 6.6 | 4.0 | 120 Ns | 72 g | D | 29.95 |
|
18mm Diameter = 0.69" = 11/16". Delay times are 2, 4, 8, 12 seconds, i.e.: B4-4 or G30-12. "ILP Method" = 80F20-8; 80= total impulse Newton seconds, F= NAR letter class, 20= Average thrust Newtons, 8= delay time from burnout to ejection in seconds, All motors include 12 volt electrical igniter. Compare USR and Estes motors (2001 prices)  2010: Estes C 3/$11.99 or $0.444-/N-s USR E $0.273/N-s, USR F $0.249/N-s or a 43.9% discount on power. More power to you!! |
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18mm SU |
24mm SU |
29mm SU |
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