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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 57 motors that fit and appear to have enough thrust (693 motors didn't fit, 50 motors failed safety checks). 107 motor had thrust curves available and 231 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:   Der Fiber Max 38
Owner: Kevin Katz
Body Diameter: 4.00in
Dry Weight: 3,050g
MMT Diameter: 38.0mm
MMT Length: 14.00in
CD: 0.60

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 3,297g 58ft/s 174ft/s 9.4G 487ft 5.7s 5s
OK AeroTech H130 3,287g 50ft/s 157ft/s 7.0G 512ft 6.1s 4s
OK AeroTech H669 3,302g 92ft/s 209ft/s 33.2G 608ft 6.1s 6s
OK Loki H144 3,386g 49ft/s 179ft/s 6.5G 616ft 6.6s 5s
OK AeroTech H219 3,311g 53ft/s 199ft/s 8.0G 639ft 6.6s 5s
OK AeroTech H242 3,314g 48ft/s 199ft/s 6.3G 672ft 6.9s 5s
OK Loki H160 3,385g 54ft/s 197ft/s 7.7G 703ft 6.9s 5s
OK Cesaroni H400 3,334g 65ft/s 232ft/s 12.6G 754ft 6.9s 6s
OK Cesaroni H225 3,243g 50ft/s 236ft/s 7.1G 845ft 7.5s 6s
OK AeroTech I218 3,422g 54ft/s 254ft/s 7.5G 1,005ft 8.2s 7s
OK AeroTech I180 3,435g 61ft/s 244ft/s 9.8G 1,044ft 8.3s 6s
OK AeroTech H550 3,373g 82ft/s 287ft/s 18.6G 1,050ft 8.0s 7s
OK AeroTech H550 3,366g 82ft/s 289ft/s 18.7G 1,058ft 8.0s 7s
warningsW Cesaroni H565 3,412g 81ft/s 292ft/s 18.4G 1,070ft 8.0s 7s
OK AeroTech H999 3,381g 110ft/s 303ft/s 47.5G 1,097ft 8.0s 8s
OK AeroTech I245 3,415g 65ft/s 283ft/s 11.4G 1,195ft 8.7s 7s
OK AeroTech I357 3,393g 62ft/s 292ft/s 10.4G 1,206ft 8.7s 7s
OK Cesaroni I566 3,434g 78ft/s 336ft/s 17.6G 1,324ft 8.8s 8s
OK Cesaroni I345 3,445g 60ft/s 340ft/s 10.5G 1,444ft 9.4s 8s
OK AeroTech I285 3,543g 59ft/s 332ft/s 9.9G 1,469ft 9.6s 8s
OK Cesaroni I236 3,450g 51ft/s 327ft/s 8.2G 1,496ft 9.9s 8s
OK Cesaroni I800 3,507g 94ft/s 379ft/s 25.4G 1,541ft 9.4s 9s
OK AeroTech I211 3,505g 54ft/s 323ft/s 8.3G 1,558ft 10.0s 8s
OK AeroTech I195 3,622g 57ft/s 325ft/s 9.2G 1,582ft 10.1s 8s
OK AeroTech I305 3,631g 61ft/s 346ft/s 10.5G 1,590ft 9.9s 8s
OK AeroTech I1299 3,472g 127ft/s 396ft/s 43.7G 1,604ft 9.4s 9s
OK AeroTech I300 3,491g 63ft/s 351ft/s 12.6G 1,608ft 9.9s 8s
OK Loki I316 3,590g 69ft/s 372ft/s 13.3G 1,763ft 10.2s 9s
OK Cesaroni I287 3,655g 52ft/s 381ft/s 8.7G 1,807ft 10.6s 9s
OK Loki I210 3,590g 61ft/s 355ft/s 11.6G 1,835ft 10.6s 8s
OK Loki I405 3,593g 88ft/s 406ft/s 21.8G 1,904ft 10.4s 9s
OK Cesaroni I285 3,556g 57ft/s 397ft/s 9.1G 1,946ft 11.0s 9s
OK Cesaroni I255 3,566g 54ft/s 394ft/s 8.1G 1,971ft 11.1s 9s
OK Loki I377 3,610g 79ft/s 414ft/s 17.6G 2,017ft 10.8s 9s
OK Loki I430 3,590g 67ft/s 434ft/s 14.1G 2,019ft 10.8s 10s
OK AMW I297 3,641g 58ft/s 416ft/s 9.5G 2,066ft 11.1s 9s
OK AeroTech I327 3,678g 63ft/s 422ft/s 11.0G 2,066ft 11.1s 9s
OK AeroTech I366 3,606g 69ft/s 429ft/s 12.8G 2,079ft 11.0s 10s
OK AeroTech I364 3,728g 61ft/s 423ft/s 10.5G 2,089ft 11.1s 9s
OK Cesaroni I303 3,550g 59ft/s 421ft/s 10.9G 2,106ft 11.2s 9s
OK Cesaroni I242 3,600g 51ft/s 409ft/s 7.1G 2,118ft 11.5s 9s
OK Cesaroni I470 3,545g 73ft/s 456ft/s 15.0G 2,123ft 10.9s 10s
OK AeroTech I280 3,666g 55ft/s 424ft/s 8.4G 2,140ft 11.4s 9s
OK AeroTech I435 3,568g 85ft/s 469ft/s 20.6G 2,271ft 11.2s 10s
OK Cesaroni I350 3,832g 60ft/s 453ft/s 9.7G 2,272ft 11.6s 10s
OK AeroTech I284 3,606g 68ft/s 452ft/s 12.8G 2,317ft 11.5s 10s
OK AeroTech I500 3,626g 71ft/s 506ft/s 15.2G 2,484ft 11.7s 10s
OK AeroTech I600 3,652g 88ft/s 526ft/s 21.9G 2,551ft 11.7s 11s
OK AeroTech I350 3,666g 65ft/s 510ft/s 12.7G 2,565ft 12.0s 10s
OK AeroTech J420 3,700g 72ft/s 508ft/s 14.4G 2,568ft 12.0s 10s
OK Cesaroni J285 3,645g 57ft/s 480ft/s 9.3G 2,583ft 12.3s 10s
OK AeroTech J350 3,715g 84ft/s 511ft/s 21.6G 2,603ft 11.9s 10s
OK AeroTech J340 3,627g 70ft/s 501ft/s 15.9G 2,607ft 12.0s 10s
OK Cesaroni J357 3,651g 66ft/s 510ft/s 13.4G 2,631ft 12.2s 10s
OK AeroTech J425 3,681g 61ft/s 540ft/s 11.5G 2,714ft 12.3s 11s
OK AeroTech J270 3,692g 57ft/s 501ft/s 8.9G 2,808ft 12.8s 10s
OK AeroTech J500 3,704g 87ft/s 570ft/s 20.8G 2,898ft 12.4s 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 (175ft)
failedG AeroTech G67 speed at end of launch guide too slow (26ft/s)
failedG Loki G69 speed at end of launch guide too slow (27ft/s)
failedG AeroTech G61 speed at end of launch guide too slow (24ft/s)
failedG Loki G70 speed at end of launch guide too slow (29ft/s)
failedG Loki G94 speed at end of launch guide too slow (34ft/s)
failedG Cesaroni G69 speed at end of launch guide too slow (24ft/s)
failedG Loki G80 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni G46 speed at end of launch guide too slow (18ft/s)
failedG Cesaroni G185 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (24ft/s)
failedG Loki G66 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni G60 speed at end of launch guide too slow (25ft/s)
failedG AeroTech G69 speed at end of launch guide too slow (24ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (19ft/s)
failedG Cesaroni G115 speed at end of launch guide too slow (33ft/s)
failedG Cesaroni G78 speed at end of launch guide too slow (26ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (17ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (23ft/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 (43ft/s)
failedG AeroTech H123 speed at end of launch guide too slow (36ft/s)
failedG AeroTech H100 speed at end of launch guide too slow (32ft/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 (35ft/s)
failedG Loki H125 speed at end of launch guide too slow (44ft/s)
failedG Cesaroni H143 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni H120 speed at end of launch guide too slow (36ft/s)
failedG AeroTech H112 speed at end of launch guide too slow (29ft/s)
failedG Cesaroni H110 speed at end of launch guide too slow (31ft/s)
failedG Cesaroni H152 speed at end of launch guide too slow (41ft/s)
failedG AeroTech H178 speed at end of launch guide too slow (39ft/s)
failedG Cesaroni H125 speed at end of launch guide too slow (35ft/s)
failedG Cesaroni H100 speed at end of launch guide too slow (31ft/s)
failedG AeroTech H170 speed at end of launch guide too slow (42ft/s)
failedG AeroTech H45 speed at end of launch guide too slow (24ft/s)
failedG AeroTech I161 speed at end of launch guide too slow (45ft/s)
failedG AeroTech I140 speed at end of launch guide too slow (40ft/s)
failedG Cesaroni I180 speed at end of launch guide too slow (41ft/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 (45ft/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 (36ft/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 (17ft/s)
failedG Cesaroni I55 speed at end of launch guide too slow (19ft/s)
failedG Cesaroni I175 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni I223 speed at end of launch guide too slow (47ft/s)
failedG AeroTech I59 speed at end of launch guide too slow (37ft/s)
failedG Loki I110 speed at end of launch guide too slow (38ft/s)

G These simulations were run with a launch guide length of 6ft (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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