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Motor Guide Results

Here is your handy guide to the motors that might work with your rocket. We found 50 motors that fit and appear to have enough thrust (755 motors didn't fit, 6 motors failed safety checks). 56 motor had thrust curves available and 116 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:   X-Ray XL 38mm
Owner: Jim Lane
Body Diameter: 3.00in
Dry Weight: 42.5oz
MMT Diameter: 38.0mm
MMT Length: 8.50in
CD: 0.70

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
OK Loki G69 51.0oz 55ft/s 195ft/s 5.9G 661ft 6.8s 5s
OK AeroTech G61 49.3oz 49ft/s 193ft/s 4.9G 675ft 7.0s 5s
OK AeroTech G67 49.6oz 52ft/s 204ft/s 5.6G 681ft 7.0s 5s
OK Loki G70 51.0oz 55ft/s 206ft/s 6.2G 734ft 7.2s 5s
OK Loki G80 51.5oz 59ft/s 216ft/s 6.8G 753ft 7.1s 6s
OK AeroTech G339 48.9oz 117ft/s 254ft/s 26.8G 761ft 6.7s 6s
OK Loki G94 51.0oz 65ft/s 230ft/s 8.3G 799ft 7.2s 6s
OK Cesaroni G69 49.4oz 49ft/s 228ft/s 5.3G 845ft 7.7s 6s
OK Loki G66 51.3oz 60ft/s 228ft/s 7.1G 895ft 7.8s 6s
OK Cesaroni G185 49.1oz 80ft/s 277ft/s 14.1G 897ft 7.3s 7s
OK AeroTech G69 49.6oz 49ft/s 247ft/s 5.1G 930ft 8.0s 6s
OK Cesaroni G60 49.8oz 50ft/s 244ft/s 5.2G 952ft 8.1s 6s
OK Cesaroni G78 49.4oz 52ft/s 262ft/s 8.5G 1,006ft 8.2s 6s
OK Cesaroni G115 49.4oz 63ft/s 283ft/s 8.6G 1,012ft 8.0s 7s
OK Loki H100 54.3oz 62ft/s 340ft/s 8.6G 1,480ft 9.4s 7s
warningsW AeroTech H283 51.2oz 104ft/s 417ft/s 22.6G 1,550ft 9.1s 8s
OK AeroTech H148 53.4oz 77ft/s 393ft/s 12.1G 1,635ft 9.6s 8s
OK AeroTech H130 50.9oz 93ft/s 387ft/s 17.4G 1,658ft 9.5s 8s
OK AeroTech H669 51.4oz 161ft/s 488ft/s 76.5G 1,725ft 9.3s 9s
OK AeroTech H123 52.2oz 67ft/s 383ft/s 9.3G 1,786ft 10.2s 8s
OK AeroTech H100 51.7oz 60ft/s 389ft/s 8.0G 1,796ft 10.3s 8s
OK Loki H90 54.3oz 67ft/s 372ft/s 8.7G 1,815ft 10.4s 8s
OK Cesaroni H123 53.0oz 60ft/s 427ft/s 9.0G 1,832ft 10.3s 8s
OK Loki H144 54.4oz 89ft/s 418ft/s 15.5G 1,833ft 10.0s 8s
OK AeroTech H219 51.7oz 100ft/s 468ft/s 19.4G 1,849ft 9.8s 9s
OK Loki H125 54.6oz 77ft/s 403ft/s 12.5G 1,849ft 10.2s 8s
OK Cesaroni H143 54.7oz 63ft/s 439ft/s 9.6G 1,861ft 10.3s 9s
OK AeroTech H242 51.8oz 87ft/s 472ft/s 15.5G 1,938ft 10.1s 9s
OK Loki H160 54.3oz 95ft/s 452ft/s 18.1G 1,964ft 10.1s 9s
OK Cesaroni H400 52.5oz 115ft/s 541ft/s 29.5G 1,996ft 9.9s 9s
OK AeroTech H112 55.9oz 54ft/s 395ft/s 6.1G 2,023ft 11.2s 8s
OK Cesaroni H120 52.9oz 65ft/s 456ft/s 9.1G 2,064ft 10.8s 9s
OK Cesaroni H110 54.0oz 58ft/s 448ft/s 7.1G 2,109ft 11.1s 8s
OK Cesaroni H125 52.8oz 62ft/s 475ft/s 9.1G 2,113ft 10.9s 9s
OK Cesaroni H152 53.0oz 72ft/s 500ft/s 13.4G 2,199ft 10.8s 9s
OK Cesaroni H225 49.3oz 90ft/s 567ft/s 17.8G 2,206ft 10.5s 9s
OK AeroTech H178 53.9oz 73ft/s 526ft/s 13.2G 2,216ft 10.8s 9s
OK Cesaroni H100 54.0oz 59ft/s 459ft/s 6.9G 2,254ft 11.5s 9s
OK AeroTech H550 53.6oz 150ft/s 655ft/s 43.0G 2,373ft 10.4s 10s
OK AeroTech H550 53.9oz 149ft/s 647ft/s 42.6G 2,379ft 10.5s 10s
OK AeroTech H999 54.2oz 194ft/s 682ft/s 105.9G 2,407ft 10.4s 10s
OK AeroTech I218 55.6oz 93ft/s 566ft/s 17.6G 2,416ft 11.0s 9s
OK AeroTech H170 54.1oz 78ft/s 552ft/s 12.5G 2,459ft 11.2s 9s
OK AeroTech I180 56.1oz 104ft/s 530ft/s 22.3G 2,470ft 11.1s 9s
OK AeroTech I161 55.4oz 80ft/s 544ft/s 13.2G 2,541ft 11.4s 9s
OK AeroTech H45 55.4oz 48ft/s 372ft/s 4.5G 2,551ft 13.0s 7s
OK AeroTech I175 54.8oz 90ft/s 543ft/s 15.5G 2,593ft 11.6s 10s
OK AeroTech I245 55.4oz 109ft/s 609ft/s 25.9G 2,624ft 11.1s 10s
OK AeroTech I140 55.1oz 73ft/s 533ft/s 10.7G 2,624ft 11.7s 9s
OK AeroTech I357 54.6oz 108ft/s 640ft/s 24.0G 2,639ft 11.1s 10s

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
failedG Cesaroni G46 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G79 speed at end of launch guide too slow (47ft/s)
failedG Cesaroni G58 speed at end of launch guide too slow (41ft/s)
failedG Cesaroni G50 speed at end of launch guide too slow (38ft/s)
failedG AeroTech H73 speed at end of launch guide too slow (47ft/s)
failedG AeroTech I49 speed at end of launch guide too slow (36ft/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.)

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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