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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 65 motors that fit and appear to have enough thrust (672 motors didn't fit, 54 motors failed safety checks). 119 motor had thrust curves available and 251 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:   Level 2 - 38mm
Owner: Mike Zapolski, Sr.
Body Diameter: 4.00in
Dry Weight: 4,169g
MMT Diameter: 38.0mm
MMT Length: 15.00in
CD: 0.54

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
warningsW AeroTech H283 4,416g 57ft/s 125ft/s 6.7G 281ft 4.5s 4s
OK AeroTech H130 4,406g 48ft/s 108ft/s 5.0G 286ft 4.7s 3s
OK AeroTech H669 4,421g 91ft/s 154ft/s 24.5G 367ft 4.9s 5s
OK AeroTech H219 4,430g 53ft/s 141ft/s 5.7G 374ft 5.2s 4s
OK Loki H160 4,504g 52ft/s 140ft/s 5.5G 417ft 5.6s 4s
OK Cesaroni H400 4,453g 66ft/s 169ft/s 9.2G 459ft 5.6s 5s
OK Cesaroni H225 4,362g 49ft/s 168ft/s 5.0G 504ft 6.1s 5s
OK AeroTech I218 4,541g 52ft/s 184ft/s 5.4G 626ft 6.8s 5s
OK AeroTech I180 4,554g 60ft/s 176ft/s 7.1G 657ft 6.9s 5s
OK AeroTech H550 4,492g 83ft/s 212ft/s 13.7G 682ft 6.6s 6s
OK AeroTech H550 4,485g 83ft/s 213ft/s 13.8G 687ft 6.7s 6s
warningsW Cesaroni H565 4,531g 81ft/s 216ft/s 13.7G 697ft 6.7s 6s
OK AeroTech H999 4,500g 111ft/s 225ft/s 35.4G 725ft 6.7s 6s
OK AeroTech I245 4,534g 63ft/s 207ft/s 8.3G 778ft 7.3s 6s
OK AeroTech I357 4,512g 60ft/s 213ft/s 7.6G 784ft 7.4s 6s
OK Cesaroni I566 4,553g 78ft/s 249ft/s 13.2G 896ft 7.6s 7s
OK Cesaroni I345 4,564g 60ft/s 250ft/s 7.7G 978ft 8.1s 7s
OK AeroTech I285 4,662g 60ft/s 246ft/s 7.2G 1,000ft 8.3s 7s
OK Cesaroni I236 4,569g 51ft/s 240ft/s 5.9G 1,001ft 8.5s 7s
OK AeroTech I211 4,624g 53ft/s 238ft/s 6.1G 1,055ft 8.7s 6s
OK AeroTech I195 4,741g 55ft/s 241ft/s 6.8G 1,084ft 8.8s 7s
OK Cesaroni I800 4,626g 93ft/s 283ft/s 19.1G 1,088ft 8.2s 8s
OK AeroTech I305 4,750g 62ft/s 259ft/s 7.8G 1,112ft 8.6s 7s
OK AeroTech I300 4,610g 63ft/s 261ft/s 9.3G 1,116ft 8.7s 7s
OK AeroTech I1299 4,591g 127ft/s 297ft/s 32.7G 1,152ft 8.3s 8s
OK Loki I316 4,709g 70ft/s 280ft/s 9.9G 1,264ft 9.1s 8s
OK Cesaroni I287 4,774g 53ft/s 285ft/s 6.5G 1,285ft 9.4s 8s
OK Loki I210 4,709g 61ft/s 267ft/s 8.6G 1,304ft 9.4s 7s
OK Cesaroni I285 4,675g 55ft/s 297ft/s 6.7G 1,401ft 9.8s 8s
OK Loki I405 4,712g 84ft/s 308ft/s 16.4G 1,404ft 9.4s 8s
OK Cesaroni I255 4,685g 54ft/s 294ft/s 5.9G 1,416ft 9.9s 8s
OK Loki I430 4,709g 68ft/s 327ft/s 10.5G 1,494ft 9.8s 9s
OK Loki I377 4,729g 77ft/s 315ft/s 13.2G 1,499ft 9.8s 8s
OK AMW I297 4,760g 57ft/s 314ft/s 7.0G 1,522ft 10.1s 8s
OK AeroTech I327 4,797g 61ft/s 319ft/s 8.2G 1,535ft 10.1s 8s
OK Cesaroni I242 4,719g 49ft/s 307ft/s 5.2G 1,541ft 10.5s 8s
OK AeroTech I366 4,725g 69ft/s 324ft/s 9.5G 1,549ft 10.0s 9s
OK Cesaroni I303 4,669g 58ft/s 317ft/s 8.0G 1,554ft 10.2s 8s
OK AeroTech I364 4,847g 62ft/s 321ft/s 7.9G 1,559ft 10.1s 8s
OK AeroTech I280 4,785g 56ft/s 319ft/s 6.2G 1,583ft 10.4s 8s
OK Cesaroni I470 4,664g 74ft/s 343ft/s 11.2G 1,600ft 10.0s 9s
OK Cesaroni I350 4,951g 61ft/s 346ft/s 7.2G 1,733ft 10.7s 9s
OK AeroTech I435 4,687g 83ft/s 356ft/s 15.4G 1,750ft 10.4s 9s
OK KBA I301 4,895g 59ft/s 344ft/s 7.5G 1,753ft 10.8s 9s
OK AeroTech I284 4,725g 68ft/s 345ft/s 9.5G 1,773ft 10.7s 9s
OK KBA I550 4,881g 76ft/s 384ft/s 13.4G 1,833ft 10.6s 10s
OK Cesaroni I216 4,770g 52ft/s 333ft/s 6.2G 1,906ft 11.5s 8s
OK AeroTech I500 4,745g 74ft/s 386ft/s 11.4G 1,960ft 11.0s 10s
OK Cesaroni J270 4,824g 52ft/s 362ft/s 5.5G 1,986ft 11.6s 9s
OK Cesaroni J335 4,796g 62ft/s 377ft/s 7.7G 2,009ft 11.4s 9s
OK Cesaroni J285 4,764g 58ft/s 367ft/s 7.0G 2,011ft 11.5s 9s
warningsW Cesaroni I540 4,767g 78ft/s 401ft/s 12.6G 2,019ft 11.1s 10s
OK AeroTech I350 4,785g 65ft/s 390ft/s 9.5G 2,026ft 11.3s 10s
OK Cesaroni J316 4,776g 61ft/s 372ft/s 8.3G 2,031ft 11.5s 9s
OK AeroTech J420 4,819g 71ft/s 390ft/s 10.8G 2,037ft 11.3s 10s
OK AeroTech I600 4,771g 90ft/s 403ft/s 16.5G 2,043ft 11.1s 10s
OK AeroTech J340 4,746g 70ft/s 384ft/s 11.9G 2,069ft 11.4s 9s
OK Cesaroni J357 4,770g 65ft/s 391ft/s 10.0G 2,085ft 11.5s 10s
OK AeroTech J350 4,834g 83ft/s 394ft/s 16.3G 2,086ft 11.3s 10s
OK KBA J740 4,893g 96ft/s 424ft/s 19.2G 2,113ft 11.1s 10s
OK Cesaroni J290 4,829g 57ft/s 383ft/s 7.3G 2,151ft 11.9s 10s
OK AeroTech J425 4,800g 63ft/s 412ft/s 8.7G 2,173ft 11.7s 10s
OK AeroTech J270 4,811g 56ft/s 386ft/s 6.6G 2,233ft 12.1s 10s
OK AeroTech J500 4,823g 83ft/s 441ft/s 15.7G 2,398ft 11.9s 11s
OK AeroTech J435 4,793g 79ft/s 462ft/s 13.7G 2,624ft 12.5s 11s

W Motor total weight unknown, lift-off Weight not accurate.

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.

  Motor Reason
failedA AeroTech G339 rocket doesn't reach a safe altitude (95ft)
failedG AeroTech G67 speed at end of launch guide too slow (23ft/s)
failedG Loki G69 speed at end of launch guide too slow (24ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (21ft/s)
failedG Loki G70 speed at end of launch guide too slow (26ft/s)
failedG Loki G94 speed at end of launch guide too slow (32ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (20ft/s)
failedG Loki G80 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (12ft/s)
failedG Cesaroni G185 speed at end of launch guide too slow (43ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (23ft/s)
failedG Loki G66 speed at end of launch guide too slow (28ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (21ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (21ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (15ft/s)
failedG Cesaroni G115 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (23ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (13ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (21ft/s)
failedG Loki H100 speed at end of launch guide too slow (33ft/s)
failedG AeroTech H148 speed at end of launch guide too slow (41ft/s)
failedG AeroTech H123 speed at end of launch guide too slow (34ft/s)
failedG AeroTech H100 speed at end of launch guide too slow (31ft/s)
failedG AeroTech H242 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni H123 speed at end of launch guide too slow (32ft/s)
failedG Loki H90 speed at end of launch guide too slow (32ft/s)
failedG Loki H144 speed at end of launch guide too slow (47ft/s)
failedG Loki H125 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni H143 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni H120 speed at end of launch guide too slow (34ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (26ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (29ft/s)
failedG Cesaroni H152 speed at end of launch guide too slow (39ft/s)
failedG AeroTech H178 speed at end of launch guide too slow (38ft/s)
failedG Cesaroni H125 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (29ft/s)
failedG AeroTech H170 speed at end of launch guide too slow (41ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (22ft/s)
failedG AeroTech I161 speed at end of launch guide too slow (43ft/s)
failedG AeroTech I140 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni I180 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni I212 speed at end of launch guide too slow (44ft/s)
failedG AeroTech I225 speed at end of launch guide too slow (46ft/s)
failedG Cesaroni I195 speed at end of launch guide too slow (46ft/s)
failedG AeroTech I154 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni I170 speed at end of launch guide too slow (44ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (14ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (16ft/s)
failedG Cesaroni I175 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni I223 speed at end of launch guide too slow (46ft/s)
failedG AeroTech I59 speed at end of launch guide too slow (36ft/s)
failedG Loki I110 speed at end of launch guide too slow (37ft/s)
failedG Cesaroni I125 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni J94 speed at end of launch guide too slow (32ft/s)

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.)

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 lift-off. (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 (comma-separated value, or CSV) that can be opened with almost any spreadsheet program.

CSV Excel   Download full details of the simulation runs with the various motors:
that worked, that failed, or all of them.
 
RockSim   Download the list of motors that fit your rocket into a batch for use with SMARTSim. (See the Simulators page for more info.)

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 right-click (control-click on the Mac) on the link and chose Save File As (or similar).

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