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

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

Estes Cosmic Interceptor

Estes - Cosmic Interceptor {Kit} (001351) [2013-]

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
Aerotech C6W	10.91	2:1	4:1	94.41	40.36	5.0	1.62	1.60	3.02	100
Apogee E6	11.73	2:1	7:1	179.06	91.91	3.5	6.22	3.50	8.72	785
Aerotech D7T	11.59	2:1	4:1	81.12	60.30	5.9	2.94	2.50	5.24	276
Apogee B7	10.42	2:1	5:1	133.32	21.84	5.7	0.77	1.00	1.57	27
Aerotech D8	10.77	3:1	5:1	136.93	77.47	3.6	2.46	3.00	5.26	354
Aerotech E10	11.52	3:1	7:1	170.39	145.89	3.3	4.08	4.40	8.28	1004
Estes D11	11.68	3:1	9:1	241.52	75.84	2.5	1.88	3.20	4.88	275
Apogee C10	10.72	4:1	9:1	250.06	45.95	2.9	0.99	2.00	2.79	104
Aerotech D9W	11.76	4:1	7:1	164.64	83.85	4.9	1.96	3.20	4.96	299
Estes D12	11.60	4:1	11:1	276.17	75.04	2.4	1.68	3.10	4.58	258
Aerotech C12T	10.87	4:1	7:1	190.40	45.61	2.9	0.94	2.00	2.74	98
Estes C11	11.34	4:1	8:1	197.46	42.45	2.9	0.81	1.90	2.51	77
Aerotech E12RCJ	12.19	4:1	7:1	158.44	140.25	3.3	3.13	4.50	7.43	809
Aerotech D13W	11.26	4:1	8:1	203.71	93.20	2.4	1.75	3.40	4.95	357
Aerotech E11J	12.30	4:1	7:1	160.13	137.63	3.2	2.86	4.50	7.16	746
Aerotech D10W	11.01	4:1	9:1	239.07	96.42	2.6	1.46	3.60	4.86	358
Apogee D10	11.01	5:1	9:1	240.49	96.27	2.6	1.46	3.60	4.86	356
Aerotech D15T	11.65	5:1	10:1	258.31	94.85	2.0	1.43	3.60	4.83	350
Aerotech F12	12.45	5:1	8:1	205.19	185.61	2.5	2.97	5.20	7.97	1053
Aerotech E15W	11.87	5:1	10:1	266.88	171.92	2.0	2.73	5.20	7.73	973
Aerotech E18W	12.11	6:1	11:1	283.10	184.09	1.9	2.23	5.40	7.43	949
Aerotech E20W	11.83	7:1	12:1	324.04	172.02	1.7	1.77	5.30	6.87	804
Aerotech D21T	10.98	7:1	11:1	317.13	110.41	1.7	1.02	4.10	4.92	381
Aerotech D24T	11.19	8:1	15:1	239.93	91.24	2.5	0.96	3.60	4.36	286
CTI 24E22-13A	12.09	8:1	11:1	281.03	131.47	2.5	1.15	4.60	5.55	498
Aerotech F24	12.30	8:1	15:1	374.65	212.16	1.6	2.13	5.90	7.83	1119
Aerotech E25T	10.81	8:1	16:1	462.44	135.23	1.3	0.98	4.70	5.48	508
CTI 26E31-15A	11.93	10:1	16:1	415.15	143.76	1.8	0.91	5.00	5.71	544
Aerotech E30T	11.63	12:1	17:1	478.84	215.05	1.2	1.27	5.90	6.97	942
Aerotech E28T	12.02	12:1	18:1	476.32	208.31	1.2	1.27	5.90	6.97	921
Estes E30T	11.61	12:1	18:1	487.42	180.09	1.3	1.07	5.50	6.37	737
Aerotech F39	12.22	13:1	21:1	563.66	254.25	1.1	1.36	6.40	7.56	1158
Aerotech F44W	11.79	15:1	23:1	639.68	242.40	1.4	1.03	6.20	7.03	969
Aerotech E50	11.45	19:1	20:1	538.06	251.75	1.2	0.89	6.40	7.09	998
CTI 25E75-17A	11.93	26:1	34:1	935.89	131.53	0.9	0.34	4.70	4.84	418

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.