Motor Guide Results
Here is your handy guide to the motors that might work with your rocket.
We found 85 motors that fit and appear to have enough thrust
(706 motors didn't fit, 14 motors failed safety checks).
99 motor had thrust curves available and 220 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: 

Zephyr 
Owner: 
David Head 
Body Diameter: 
102.0mm 
Dry Weight: 
1,200g 
MMT Diameter: 
38.0mm 
MMT Length: 
350.0mm 
C_{D}: 
0.50 
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 

Loki G69 
1,440g 
15m/s 
59m/s 
5.9G 
192m 
6.5s 
5s 

Loki G70 
1,442g 
16m/s 
62m/s 
6.2G 
212m 
6.9s 
5s 

Loki G80 
1,455g 
16m/s 
65m/s 
6.9G 
217m 
6.8s 
5s 

AeroTech G339 
1,381g 
32m/s 
77m/s 
26.9G 
217m 
6.4s 
6s 

Loki G94 
1,440g 
17m/s 
69m/s 
8.3G 
229m 
6.9s 
5s 

Cesaroni G185 
1,388g 
22m/s 
84m/s 
14.0G 
254m 
7.0s 
6s 

Loki G66 
1,450g 
16m/s 
68m/s 
7.2G 
256m 
7.5s 
5s 

Cesaroni G115 
1,395g 
18m/s 
85m/s 
8.6G 
286m 
7.6s 
6s 

Loki H100 
1,535g 
17m/s 
101m/s 
8.5G 
410m 
8.9s 
7s 
W 
AeroTech H283 
1,447g 
28m/s 
126m/s 
22.6G 
423m 
8.5s 
8s 

AeroTech H148 
1,509g 
21m/s 
117m/s 
12.1G 
448m 
9.0s 
8s 

AeroTech H130 
1,437g 
25m/s 
115m/s 
17.4G 
453m 
8.9s 
7s 

AeroTech H669 
1,452g 
46m/s 
148m/s 
76.8G 
466m 
8.6s 
8s 

AeroTech H123 
1,475g 
18m/s 
113m/s 
9.3G 
489m 
9.5s 
7s 

AeroTech H100 
1,461g 
17m/s 
114m/s 
7.9G 
491m 
9.6s 
7s 

Loki H90 
1,535g 
18m/s 
109m/s 
8.7G 
499m 
9.8s 
7s 

AeroTech H219 
1,461g 
27m/s 
141m/s 
19.5G 
499m 
9.1s 
8s 

Loki H144 
1,536g 
24m/s 
124m/s 
15.5G 
499m 
9.3s 
8s 

Cesaroni H123 
1,497g 
16m/s 
127m/s 
8.9G 
500m 
9.6s 
8s 

Loki H125 
1,542g 
21m/s 
119m/s 
12.6G 
505m 
9.6s 
8s 

Cesaroni H143 
1,547g 
18m/s 
131m/s 
9.4G 
507m 
9.6s 
8s 

AeroTech H242 
1,464g 
24m/s 
141m/s 
15.5G 
524m 
9.4s 
8s 

Loki H160 
1,535g 
26m/s 
134m/s 
18.2G 
532m 
9.4s 
8s 

Cesaroni H400 
1,484g 
32m/s 
163m/s 
29.4G 
535m 
9.2s 
9s 

AeroTech H112 
1,579g 
15m/s 
116m/s 
6.1G 
554m 
10.5s 
7s 

Cesaroni H120 
1,495g 
18m/s 
134m/s 
9.1G 
560m 
10.0s 
8s 

Cesaroni H125 
1,493g 
17m/s 
140m/s 
9.1G 
572m 
10.1s 
8s 

Cesaroni H110 
1,525g 
16m/s 
132m/s 
7.1G 
573m 
10.3s 
8s 

Cesaroni H225 
1,393g 
26m/s 
169m/s 
17.9G 
588m 
9.6s 
8s 

Cesaroni H152 
1,498g 
20m/s 
148m/s 
13.5G 
592m 
10.0s 
8s 

AeroTech H178 
1,524g 
19m/s 
156m/s 
13.0G 
595m 
10.0s 
8s 

Cesaroni H100 
1,527g 
16m/s 
134m/s 
6.9G 
611m 
10.7s 
8s 

AeroTech H550 
1,516g 
41m/s 
197m/s 
43.0G 
627m 
9.5s 
9s 

AeroTech H550 
1,523g 
41m/s 
195m/s 
42.6G 
630m 
9.6s 
9s 

AeroTech H999 
1,531g 
52m/s 
207m/s 
106.3G 
635m 
9.5s 
9s 
W 
Cesaroni H565 
1,562g 
38m/s 
198m/s 
39.7G 
636m 
9.7s 
9s 

AeroTech I218 
1,572g 
26m/s 
168m/s 
17.6G 
646m 
10.1s 
9s 

AeroTech H170 
1,530g 
22m/s 
162m/s 
12.3G 
658m 
10.3s 
8s 

AeroTech I180 
1,585g 
30m/s 
156m/s 
22.3G 
661m 
10.2s 
8s 

AeroTech I161 
1,566g 
22m/s 
159m/s 
13.2G 
680m 
10.5s 
8s 

Cesaroni I180 
1,594g 
20m/s 
172m/s 
12.0G 
686m 
10.6s 
9s 

AeroTech I245 
1,565g 
31m/s 
179m/s 
25.9G 
696m 
10.2s 
9s 

AeroTech I357 
1,543g 
30m/s 
190m/s 
24.1G 
699m 
10.2s 
9s 

AeroTech I225 
1,686g 
22m/s 
176m/s 
15.3G 
702m 
10.5s 
9s 

AeroTech I140 
1,556g 
19m/s 
155m/s 
10.7G 
703m 
10.8s 
8s 

Cesaroni I566 
1,584g 
35m/s 
224m/s 
38.8G 
714m 
10.1s 
9s 

Cesaroni I212 
1,675g 
21m/s 
182m/s 
13.9G 
715m 
10.7s 
9s 

Cesaroni I800 
1,657g 
42m/s 
248m/s 
52.6G 
766m 
10.3s 
10s 

AeroTech I154 
1,692g 
18m/s 
154m/s 
9.1G 
770m 
11.6s 
8s 

Cesaroni I345 
1,595g 
29m/s 
218m/s 
24.0G 
770m 
10.5s 
9s 

AeroTech I1299 
1,622g 
58m/s 
260m/s 
95.2G 
773m 
10.1s 
10s 

Cesaroni I195 
1,617g 
22m/s 
189m/s 
13.9G 
782m 
11.0s 
9s 

AeroTech I285 
1,693g 
28m/s 
205m/s 
21.8G 
783m 
10.8s 
9s 

Cesaroni I170 
1,592g 
22m/s 
193m/s 
13.4G 
802m 
11.1s 
9s 

AeroTech I305 
1,781g 
28m/s 
207m/s 
22.5G 
804m 
10.8s 
9s 

Cesaroni I236 
1,600g 
25m/s 
204m/s 
18.8G 
805m 
10.9s 
9s 

Cesaroni I175 
1,638g 
21m/s 
188m/s 
10.8G 
809m 
11.3s 
9s 

AeroTech I300 
1,641g 
31m/s 
215m/s 
27.9G 
819m 
10.8s 
9s 

AeroTech I211 
1,655g 
26m/s 
195m/s 
18.8G 
824m 
11.0s 
9s 

Cesaroni I223 
1,694g 
22m/s 
205m/s 
14.3G 
825m 
11.1s 
9s 

AeroTech I195 
1,772g 
26m/s 
191m/s 
19.8G 
830m 
11.2s 
9s 

Loki I316 
1,740g 
31m/s 
219m/s 
28.4G 
860m 
11.0s 
10s 

Cesaroni I287 
1,805g 
25m/s 
227m/s 
17.7G 
880m 
11.3s 
10s 

Loki I405 
1,743g 
41m/s 
239m/s 
46.1G 
880m 
10.9s 
10s 

Loki I210 
1,740g 
28m/s 
205m/s 
24.9G 
906m 
11.4s 
9s 

Cesaroni I285 
1,706g 
27m/s 
234m/s 
20.1G 
921m 
11.4s 
10s 

Loki I377 
1,760g 
38m/s 
239m/s 
37.2G 
923m 
11.2s 
10s 

Loki I430 
1,740g 
31m/s 
261m/s 
30.2G 
924m 
11.2s 
10s 
W 
Loki I110 
1,789g 
19m/s 
171m/s 
14.1G 
929m 
12.3s 
8s 

Cesaroni I470 
1,695g 
33m/s 
275m/s 
32.5G 
934m 
11.1s 
10s 

AeroTech I366 
1,756g 
32m/s 
250m/s 
27.5G 
935m 
11.2s 
10s 

AeroTech I327 
1,828g 
30m/s 
246m/s 
23.1G 
937m 
11.4s 
10s 

Cesaroni I255 
1,716g 
25m/s 
230m/s 
17.8G 
937m 
11.5s 
10s 

AeroTech I364 
1,878g 
27m/s 
242m/s 
21.4G 
941m 
11.4s 
10s 

Cesaroni I303 
1,700g 
28m/s 
247m/s 
23.8G 
957m 
11.4s 
10s 

AeroTech I435 
1,718g 
40m/s 
274m/s 
43.9G 
966m 
11.1s 
10s 

Cesaroni I242 
1,750g 
24m/s 
234m/s 
15.7G 
985m 
11.9s 
9s 

AeroTech I284 
1,756g 
32m/s 
255m/s 
27.1G 
998m 
11.5s 
10s 

AeroTech I600 
1,802g 
39m/s 
303m/s 
45.5G 
1,025m 
11.3s 
10s 

AeroTech J350 
1,865g 
38m/s 
283m/s 
44.1G 
1,052m 
11.5s 
10s 

AeroTech J420 
1,850g 
32m/s 
283m/s 
29.9G 
1,054m 
11.7s 
10s 

AeroTech I59 
1,687g 
17m/s 
121m/s 
9.0G 
1,056m 
14.7s 
6s 

AeroTech J340 
1,777g 
35m/s 
279m/s 
33.5G 
1,061m 
11.6s 
9s 

Cesaroni J357 
1,801g 
31m/s 
284m/s 
28.2G 
1,077m 
11.8s 
10s 

AeroTech J500 
1,854g 
40m/s 
313m/s 
42.7G 
1,116m 
11.7s 
10s 
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 2m (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.)
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).
