Motor Guide Results
Here is your handy guide to the motors that might work with your rocket.
We found 76 motors that fit and appear to have enough thrust
(692 motors didn't fit, 43 motors failed safety checks).
117 motor had thrust curves available and 235 flight simulations were performed.
Browse the motors that did and didn't work right here or download the results as a spreadsheet.
The Rocket
Rocket Name: 

Mega Der BIG Red Max 
Owner: 
Louie Berlin 
Body Diameter: 
4.00in 
Dry Weight: 
3.00lb 
MMT Diameter: 
29.0mm 
MMT Length: 
36.00in 
C_{D}: 
0.75 
Motors That Work
These motors fit your rocket and appear to have enough thrust to lift it safely.
If thrust curves are available, a quick simulation has been run to give a rough idea
of the performance of your rocket on this motor.
We encourage you to run a more complete simulation with any motor you plan to use;
see the simulators page for more info.

Motor 
Weight 
Launch 
Velocity 
Accel 
Altitude 
Time 
Delay 

AeroTech F67 
3.18lb 
51ft/s 
112ft/s 
5.1G 
220ft 
4.0s 
3s 

Estes F50 
3.19lb 
48ft/s 
126ft/s 
4.5G 
308ft 
4.8s 
3s 

Cesaroni G88 
3.34lb 
51ft/s 
149ft/s 
6.8G 
348ft 
4.9s 
4s 

AeroTech G104 
3.30lb 
60ft/s 
153ft/s 
7.3G 
366ft 
4.9s 
4s 

AeroTech G74 
3.19lb 
51ft/s 
153ft/s 
5.4G 
369ft 
5.1s 
4s 

Cesaroni G80 
3.32lb 
50ft/s 
165ft/s 
5.7G 
416ft 
5.4s 
4s 

AeroTech G77 
3.27lb 
49ft/s 
178ft/s 
5.7G 
476ft 
5.8s 
4s 

AeroTech G72 
3.29lb 
49ft/s 
183ft/s 
6.0G 
496ft 
5.9s 
4s 

AeroTech G79 
3.35lb 
52ft/s 
180ft/s 
5.6G 
500ft 
5.9s 
4s 

Cesaroni G83 
3.32lb 
53ft/s 
182ft/s 
5.8G 
504ft 
5.9s 
5s 

Cesaroni G250 
3.31lb 
91ft/s 
223ft/s 
18.5G 
552ft 
5.7s 
5s 

AeroTech G76 
3.32lb 
64ft/s 
182ft/s 
9.2G 
567ft 
6.1s 
4s 

AeroTech G75 
3.29lb 
54ft/s 
200ft/s 
6.1G 
570ft 
6.2s 
5s 

AeroTech G64 
3.33lb 
56ft/s 
178ft/s 
6.3G 
580ft 
6.3s 
4s 

Cesaroni G126 
3.32lb 
65ft/s 
214ft/s 
9.8G 
582ft 
6.0s 
5s 

AeroTech G78 
3.28lb 
52ft/s 
205ft/s 
6.0G 
618ft 
6.4s 
5s 

Cesaroni G131 
3.44lb 
61ft/s 
225ft/s 
8.6G 
626ft 
6.2s 
5s 

AeroTech G125 
3.28lb 
64ft/s 
235ft/s 
9.3G 
654ft 
6.3s 
5s 

AeroTech G80 
3.28lb 
54ft/s 
214ft/s 
6.1G 
668ft 
6.6s 
5s 

Cesaroni G106 
3.41lb 
55ft/s 
238ft/s 
7.6G 
706ft 
6.7s 
5s 

KBA G135 
3.50lb 
60ft/s 
256ft/s 
9.0G 
740ft 
6.7s 
6s 

Cesaroni G54 
3.43lb 
56ft/s 
206ft/s 
6.9G 
852ft 
7.6s 
5s 

Cesaroni G118 
3.41lb 
62ft/s 
273ft/s 
9.3G 
856ft 
7.2s 
6s 

Cesaroni G125 
3.43lb 
67ft/s 
276ft/s 
9.6G 
857ft 
7.1s 
6s 

AeroTech H165 
3.44lb 
74ft/s 
290ft/s 
11.4G 
865ft 
7.0s 
6s 

Cesaroni H133 
3.42lb 
69ft/s 
283ft/s 
11.6G 
885ft 
7.2s 
6s 

Cesaroni H175 
3.54lb 
74ft/s 
299ft/s 
13.1G 
885ft 
7.1s 
6s 

Cesaroni H54 
3.46lb 
48ft/s 
212ft/s 
5.6G 
894ft 
8.0s 
4s 

Cesaroni H90 
3.36lb 
60ft/s 
265ft/s 
9.4G 
903ft 
7.4s 
6s 

Cesaroni H87 
3.45lb 
54ft/s 
262ft/s 
7.4G 
906ft 
7.6s 
6s 

RATT H70 
3.78lb 
58ft/s 
236ft/s 
7.1G 
910ft 
7.7s 
5s 

Cesaroni H163 
3.41lb 
73ft/s 
302ft/s 
13.3G 
911ft 
7.2s 
6s 

Cesaroni H410 
3.40lb 
122ft/s 
337ft/s 
33.2G 
914ft 
6.9s 
6s 

AeroTech G138 
3.33lb 
64ft/s 
310ft/s 
10.8G 
923ft 
7.3s 
6s 

AeroTech H128 
3.45lb 
71ft/s 
298ft/s 
10.8G 
933ft 
7.3s 
6s 

Cesaroni H123 
3.50lb 
61ft/s 
296ft/s 
7.9G 
949ft 
7.5s 
6s 

AeroTech H238 
3.43lb 
84ft/s 
317ft/s 
14.5G 
949ft 
7.2s 
6s 

AeroTech H115 
3.45lb 
58ft/s 
293ft/s 
7.0G 
972ft 
7.6s 
6s 

AeroTech H97 
3.61lb 
53ft/s 
284ft/s 
5.8G 
999ft 
7.9s 
6s 

Cesaroni H118 
3.51lb 
64ft/s 
301ft/s 
9.9G 
1,019ft 
7.7s 
6s 

Cesaroni H237 
3.65lb 
82ft/s 
369ft/s 
16.0G 
1,110ft 
7.7s 
7s 

AeroTech H220 
3.55lb 
89ft/s 
367ft/s 
18.4G 
1,124ft 
7.7s 
7s 

Cesaroni H151 
3.52lb 
75ft/s 
344ft/s 
12.0G 
1,139ft 
7.9s 
6s 

AeroTech H210 
3.54lb 
85ft/s 
372ft/s 
15.2G 
1,144ft 
7.8s 
7s 

KBA H130 
4.56lb 
63ft/s 
304ft/s 
9.8G 
1,162ft 
8.3s 
6s 

Cesaroni H135 
3.55lb 
68ft/s 
347ft/s 
9.5G 
1,195ft 
8.2s 
6s 

Cesaroni H170 
3.51lb 
80ft/s 
366ft/s 
14.2G 
1,196ft 
7.9s 
7s 

Cesaroni H160 
3.60lb 
69ft/s 
366ft/s 
10.6G 
1,198ft 
8.1s 
7s 

AeroTech H182 
3.46lb 
72ft/s 
382ft/s 
11.2G 
1,202ft 
8.0s 
7s 

AeroTech H180 
3.56lb 
81ft/s 
385ft/s 
15.1G 
1,240ft 
8.0s 
7s 

AeroTech H250 
3.56lb 
99ft/s 
409ft/s 
19.3G 
1,257ft 
8.0s 
7s 

AeroTech H135 
3.47lb 
67ft/s 
350ft/s 
9.0G 
1,282ft 
8.5s 
6s 

KBA H225 
3.70lb 
74ft/s 
415ft/s 
15.0G 
1,298ft 
8.2s 
7s 

AeroTech H169 
3.45lb 
86ft/s 
388ft/s 
14.2G 
1,305ft 
8.2s 
7s 

AeroTech H195 
3.43lb 
86ft/s 
416ft/s 
15.6G 
1,313ft 
8.1s 
7s 

Cesaroni H295 
3.75lb 
99ft/s 
441ft/s 
20.0G 
1,332ft 
8.1s 
7s 

Cesaroni H180 
3.69lb 
82ft/s 
410ft/s 
15.5G 
1,385ft 
8.4s 
7s 

Cesaroni H194 
3.63lb 
83ft/s 
418ft/s 
16.5G 
1,387ft 
8.4s 
7s 

Cesaroni H200 
3.60lb 
85ft/s 
424ft/s 
17.1G 
1,413ft 
8.4s 
7s 

Cesaroni H255 
3.51lb 
99ft/s 
470ft/s 
23.1G 
1,467ft 
8.3s 
7s 

Cesaroni H140 
3.61lb 
79ft/s 
397ft/s 
14.3G 
1,469ft 
8.7s 
7s 

Cesaroni H340 
3.86lb 
110ft/s 
489ft/s 
24.9G 
1,475ft 
8.4s 
7s 

Cesaroni H399 
3.65lb 
118ft/s 
508ft/s 
32.6G 
1,482ft 
8.3s 
8s 

Cesaroni H226 
3.79lb 
90ft/s 
471ft/s 
19.7G 
1,593ft 
8.7s 
7s 

Cesaroni H159 
3.76lb 
72ft/s 
437ft/s 
10.1G 
1,594ft 
9.1s 
7s 

AeroTech H268 
3.79lb 
97ft/s 
495ft/s 
18.5G 
1,601ft 
8.7s 
8s 

Cesaroni H233 
3.72lb 
91ft/s 
490ft/s 
19.5G 
1,630ft 
8.8s 
7s 

Cesaroni H255 
3.70lb 
103ft/s 
510ft/s 
24.1G 
1,651ft 
8.7s 
7s 

Cesaroni H160 
3.70lb 
91ft/s 
441ft/s 
18.2G 
1,669ft 
9.0s 
7s 

AeroTech I200 
3.79lb 
90ft/s 
476ft/s 
17.0G 
1,694ft 
9.0s 
7s 

Cesaroni I204 
3.77lb 
96ft/s 
502ft/s 
20.3G 
1,788ft 
9.1s 
7s 

AeroTech I205 
3.69lb 
84ft/s 
512ft/s 
21.1G 
1,796ft 
9.1s 
7s 

RATT I80 
4.22lb 
48ft/s 
348ft/s 
5.4G 
1,808ft 
10.7s 
6s 

Cesaroni I224 
3.82lb 
102ft/s 
545ft/s 
24.5G 
1,915ft 
9.3s 
8s 

Cesaroni I243 
3.88lb 
98ft/s 
544ft/s 
24.3G 
1,919ft 
9.3s 
8s 
D 
Estes G80 
3.28lb 
5:1 thrust/weight ratio (no data) 
Don't like the units?
Login to set your preferences.
Don't understand the results? See the motor guide help page.
Motors That Fail
These motors fit your rocket, but failed one safety check or another.
They may actually work, but you should use them only with caution.
We encourage you to run a more complete simulation to verify flight safety;
see the simulators page for more info.
G These simulations were run with a launch guide length of 8ft (rod, rail or tower).
If this is not correct, launch guide lengths can be specified for your saved rockets.
(The minimum velocity required is approximately 15m/s or 50ft/s.)
5 The 5:1 thrusttoweight ratio check is a useful rule of thumb, but it does break down for motors with unusual thrust curves.
For example, motors with a high initial thrust and a long tailoff may fail this test but still be safe for use.
A The minimum altitude check is used to ensure that the rocket flies high enough to ensure time for a safe recovery.
In addition, many barometric altimeters require a minimum altitude to detect liftoff.
(The minimum altitude is 10m or 33ft for an A motor and doubles for each impulse class).
Download the Results
The data is presented in a compact form in the tables above, broken down by motors
that worked and those that did not. If you would like to analyze the data further,
this section provides download links for files in a generic spreadsheet format
(commaseparated value, or CSV) that can be opened with almost any spreadsheet program.
You should download these files to your machine and then open them.
Normally, clicking the link will prompt you to do this.
However, if your browser insists on opening the file as plain text,
you can rightclick (controlclick on the Mac) on the link and
chose Save File As (or similar).
