Rocket Motor Guide

Rocket Name

Enter the name of the rocket. You can optionally select a rocket from the list that may appear as you type.

Rocket Diameter

Enter the diameter of the rocket's body.

Weight

Enter the weight of the rocket without the motor.

Motor Mount Diameter

Enter the diameter of the rocket's motor mount. This sets the largest diameter motor which will fit.

Motor Mount Length

Enter the length of the rocket's motor mount. This sets the longest motor which will fit.

Drag

Low Normal High

Select the approximate drag of the rocket. Sleeker rockets with a smooth finish will have lower drag.

Semroc Hydra One

Semroc - Hydra One {Kit} (KA-18)

Motor	Weight oz	TTW Average	TTW Peak	Accel f/s²	Speed mph	Rod Len feet	Burnout Time sec	Optimal Delay sec	Time to Apogee sec	Altitude feet
Apogee C4	6.60	2:1	7:1	170.06	50.04	3.5	2.37	2.30	4.47	207
Estes C5	6.74	2:1	12:1	335.89	62.69	1.9	2.01	2.80	4.61	232
Estes B4	6.67	2:1	8:1	196.39	29.55	7.9	1.06	1.40	2.26	53
Weco C6	6.74	3:1	7:1	193.58	38.37	5.7	1.77	1.80	3.37	109
Estes C6	6.81	3:1	8:1	221.16	63.53	4.5	1.93	2.80	4.53	223
Estes B6	6.64	3:1	7:1	185.77	33.31	5.0	0.86	1.50	2.16	55
Aerotech C6W	6.81	4:1	7:1	172.87	79.60	3.0	1.67	3.20	4.67	295
Quest B6	6.57	4:1	9:1	230.10	38.77	3.8	0.79	1.80	2.39	69
Apogee B7	6.32	4:1	9:1	242.31	42.31	2.5	0.78	1.90	2.48	82
Aerotech D8	6.67	4:1	9:1	246.14	152.96	2.2	2.46	5.50	7.76	926
Apogee C10	6.62	6:1	15:1	429.45	83.48	1.6	1.01	3.50	4.31	281
Aerotech C12T	6.77	6:1	12:1	328.30	82.68	1.8	0.96	3.50	4.26	268
Aerotech D13W	7.16	7:1	13:1	345.49	164.76	1.5	1.79	5.70	7.29	871
Aerotech D10W	6.91	7:1	15:1	408.33	170.78	1.6	1.39	6.10	7.29	876
Apogee D10	6.91	8:1	15:1	410.63	171.29	1.6	1.50	6.00	7.30	878
Aerotech D21T	6.88	13:1	19:1	535.93	190.15	1.2	0.98	6.50	7.28	923
Aerotech D24T	7.09	13:1	25:1	405.02	161.36	1.5	1.00	5.90	6.70	740
Aerotech E25T	6.71	14:1	27:1	782.97	233.58	0.9	0.95	7.30	8.05	1189

Weight - The total weight of the rocket, with motor, at lift-off.

TTW Average - The average thrust-to-weight ratio of the rocket.

TTW Peak - The peak thrust-to-weight ratio of the rocket.

Accel - The maximum acceleration experienced by the rocket.

Speed - The maximum speed experienced by the rocket.

Rod Len - The minimal rod/rail length for the rocket to reach a safe speed (9 m/s) for free flight.

Optimal Delay - The optimal delay time (equal to the time from burnout to apogee).

Altitude - The altitude at apogee.

Note: These simulation results should be used with caution. Always double-check to ensure that your flight will be safe.

The Rocket Motor Guide helps you choose the right motor to use in your rocket by running a simulation using each of the motors in the RocketReviews.com motor database.