Motor Guide Results
Here is your handy guide to the motors that might work with your rocket.
We found 74 motors that fit and appear to have enough thrust
(694 motors didn't fit, 23 motors failed safety checks).
95 motor had thrust curves available and 184 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: 

Freefall 29mm 
Owner: 
Jim Lane 
Body Diameter: 
4.00in 
Dry Weight: 
38.3oz 
MMT Diameter: 
29.0mm 
MMT Length: 
12.00in 
C_{D}: 
0.43 
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 F62 
42.1oz 
48ft/s 
116ft/s 
4.4G 
249ft 
4.3s 
3s 

AeroTech F42 
41.0oz 
48ft/s 
114ft/s 
5.0G 
272ft 
4.5s 
3s 

Cesaroni F59 
41.8oz 
50ft/s 
126ft/s 
5.1G 
281ft 
4.5s 
4s 

Cesaroni F120 
42.0oz 
74ft/s 
139ft/s 
11.3G 
286ft 
4.4s 
4s 

AeroTech F50 
41.3oz 
51ft/s 
149ft/s 
5.3G 
396ft 
5.3s 
4s 

AeroTech F52 
42.6oz 
52ft/s 
150ft/s 
5.7G 
417ft 
5.5s 
4s 
W 
Estes F50 
41.2oz 
54ft/s 
166ft/s 
5.9G 
480ft 
5.8s 
4s 

AeroTech G54 
43.1oz 
54ft/s 
166ft/s 
5.8G 
488ft 
5.9s 
4s 

Cesaroni G88 
43.7oz 
58ft/s 
190ft/s 
8.6G 
529ft 
5.9s 
5s 

AeroTech G104 
43.1oz 
68ft/s 
195ft/s 
9.2G 
554ft 
6.0s 
5s 

AeroTech G74 
41.4oz 
58ft/s 
198ft/s 
6.9G 
569ft 
6.2s 
5s 

AeroTech G53 
43.4oz 
54ft/s 
180ft/s 
6.1G 
593ft 
6.5s 
5s 

Cesaroni G80 
43.4oz 
55ft/s 
211ft/s 
7.2G 
633ft 
6.5s 
5s 
W 
Estes G40 
42.6oz 
48ft/s 
186ft/s 
5.2G 
670ft 
6.9s 
5s 

AeroTech G40 
42.6oz 
48ft/s 
186ft/s 
5.2G 
670ft 
6.9s 
5s 

AeroTech G77 
44.1oz 
52ft/s 
220ft/s 
6.5G 
691ft 
6.9s 
5s 

AeroTech G77 
42.6oz 
55ft/s 
230ft/s 
7.3G 
724ft 
6.9s 
6s 

Cesaroni G68 
43.8oz 
50ft/s 
223ft/s 
6.5G 
753ft 
7.1s 
5s 

AeroTech G79 
43.8oz 
58ft/s 
230ft/s 
7.1G 
755ft 
7.0s 
6s 

AeroTech G79 
42.7oz 
51ft/s 
224ft/s 
5.9G 
757ft 
7.2s 
5s 

Cesaroni G57 
43.4oz 
54ft/s 
213ft/s 
6.3G 
759ft 
7.2s 
5s 

Cesaroni G83 
43.4oz 
59ft/s 
234ft/s 
7.3G 
760ft 
7.0s 
6s 

Cesaroni G250 
43.3oz 
101ft/s 
278ft/s 
23.0G 
821ft 
6.9s 
6s 

AeroTech G76 
43.5oz 
71ft/s 
234ft/s 
11.5G 
848ft 
7.3s 
5s 

Cesaroni G126 
43.4oz 
75ft/s 
271ft/s 
12.2G 
868ft 
7.2s 
6s 

AeroTech G64 
43.6oz 
61ft/s 
230ft/s 
7.9G 
870ft 
7.5s 
5s 

AeroTech G75 
42.9oz 
59ft/s 
251ft/s 
7.4G 
899ft 
7.6s 
6s 

Cesaroni G131 
45.4oz 
70ft/s 
283ft/s 
10.8G 
927ft 
7.5s 
6s 

AeroTech G78 
42.7oz 
58ft/s 
263ft/s 
7.6G 
928ft 
7.6s 
6s 

AeroTech G125 
42.7oz 
70ft/s 
298ft/s 
11.8G 
975ft 
7.5s 
7s 

AeroTech G80 
42.8oz 
61ft/s 
275ft/s 
7.8G 
999ft 
7.9s 
6s 

Cesaroni G106 
44.9oz 
59ft/s 
302ft/s 
9.5G 
1,047ft 
8.0s 
7s 

KBA G82 
46.4oz 
52ft/s 
285ft/s 
6.8G 
1,065ft 
8.2s 
6s 

KBA G135 
46.3oz 
66ft/s 
320ft/s 
11.2G 
1,090ft 
8.0s 
7s 

AeroTech G75 
46.5oz 
49ft/s 
285ft/s 
5.2G 
1,132ft 
8.7s 
6s 

Cesaroni G125 
45.2oz 
73ft/s 
348ft/s 
11.9G 
1,259ft 
8.5s 
7s 

Cesaroni G118 
44.9oz 
68ft/s 
346ft/s 
11.5G 
1,260ft 
8.5s 
7s 

Cesaroni G54 
45.1oz 
64ft/s 
269ft/s 
8.6G 
1,260ft 
9.0s 
6s 

AeroTech H165 
45.4oz 
83ft/s 
363ft/s 
14.1G 
1,269ft 
8.4s 
7s 

Cesaroni H175 
47.0oz 
83ft/s 
373ft/s 
16.6G 
1,293ft 
8.4s 
7s 

Cesaroni H133 
45.0oz 
75ft/s 
357ft/s 
14.3G 
1,298ft 
8.6s 
7s 

Cesaroni H54 
45.7oz 
56ft/s 
278ft/s 
7.0G 
1,322ft 
9.3s 
6s 

Cesaroni H90 
44.0oz 
67ft/s 
340ft/s 
11.7G 
1,330ft 
8.8s 
7s 

Cesaroni H87 
45.5oz 
59ft/s 
336ft/s 
9.1G 
1,333ft 
9.0s 
7s 

Cesaroni H163 
44.9oz 
81ft/s 
379ft/s 
16.4G 
1,335ft 
8.6s 
7s 

Cesaroni H410 
44.7oz 
130ft/s 
416ft/s 
41.0G 
1,338ft 
8.3s 
8s 

AeroTech G138 
43.5oz 
70ft/s 
391ft/s 
13.6G 
1,359ft 
8.6s 
8s 

AeroTech H128 
45.6oz 
80ft/s 
375ft/s 
13.4G 
1,364ft 
8.7s 
7s 

AeroTech H238 
45.2oz 
93ft/s 
396ft/s 
17.9G 
1,386ft 
8.6s 
8s 

Cesaroni H123 
46.3oz 
67ft/s 
372ft/s 
9.8G 
1,387ft 
8.9s 
7s 

AeroTech H115 
45.5oz 
64ft/s 
373ft/s 
8.8G 
1,423ft 
9.0s 
7s 

AeroTech H97 
48.1oz 
59ft/s 
361ft/s 
7.2G 
1,456ft 
9.3s 
7s 

Cesaroni H118 
46.5oz 
72ft/s 
380ft/s 
12.1G 
1,484ft 
9.1s 
7s 

Cesaroni H237 
48.7oz 
95ft/s 
457ft/s 
20.1G 
1,607ft 
9.1s 
8s 

AeroTech H220 
47.1oz 
96ft/s 
456ft/s 
22.4G 
1,629ft 
9.1s 
8s 

KBA H130 
63.3oz 
69ft/s 
367ft/s 
11.5G 
1,633ft 
9.8s 
8s 

Cesaroni H151 
46.7oz 
83ft/s 
433ft/s 
14.7G 
1,653ft 
9.3s 
8s 

AeroTech H210 
47.0oz 
93ft/s 
463ft/s 
18.8G 
1,660ft 
9.2s 
8s 

Cesaroni H135 
47.2oz 
74ft/s 
439ft/s 
11.6G 
1,731ft 
9.6s 
8s 

Cesaroni H170 
46.5oz 
88ft/s 
459ft/s 
17.4G 
1,732ft 
9.4s 
8s 

Cesaroni H160 
47.9oz 
77ft/s 
459ft/s 
12.9G 
1,734ft 
9.6s 
8s 

AeroTech H182 
45.6oz 
80ft/s 
482ft/s 
14.0G 
1,746ft 
9.5s 
8s 

AeroTech H180 
47.2oz 
91ft/s 
482ft/s 
18.5G 
1,793ft 
9.5s 
8s 

AeroTech H250 
47.3oz 
107ft/s 
509ft/s 
23.6G 
1,818ft 
9.5s 
9s 

AeroTech H135 
45.8oz 
72ft/s 
445ft/s 
11.1G 
1,859ft 
10.0s 
8s 

Cesaroni H53 
48.4oz 
49ft/s 
343ft/s 
6.0G 
1,862ft 
11.0s 
7s 

KBA H225 
49.4oz 
81ft/s 
514ft/s 
18.5G 
1,874ft 
9.8s 
9s 

AeroTech H195 
45.2oz 
94ft/s 
524ft/s 
19.2G 
1,901ft 
9.6s 
8s 

Cesaroni H194 
48.3oz 
90ft/s 
523ft/s 
20.0G 
1,996ft 
9.9s 
9s 

Cesaroni H200 
48.0oz 
93ft/s 
531ft/s 
20.8G 
2,034ft 
10.0s 
9s 

Cesaroni H140 
48.1oz 
88ft/s 
500ft/s 
17.4G 
2,110ft 
10.3s 
8s 

Cesaroni H255 
46.5oz 
111ft/s 
587ft/s 
28.1G 
2,115ft 
9.9s 
9s 

AeroTech I205 
49.4oz 
96ft/s 
643ft/s 
25.5G 
2,559ft 
10.8s 
9s 
W,D 
Estes G80 
42.7oz 
7:1 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.
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).
