J270 Data (RockSim)
Accuracy of this data file:
| |
This File |
Certified |
± |
| Diameter |
38 mm |
38 mm |
= |
| Length |
384 mm |
384 mm |
= |
| Prop. Weight |
347 g |
347 g |
= |
| Total Weight |
687 g |
712 g |
−4% |
| Avg. Thrust |
273.1 N |
270.0 N |
+1% |
| Max. Thrust |
441.3 N |
427.6 N |
+3% |
| Total Impulse |
722.7 Ns |
648.5 Ns |
+11% |
| Burn Time |
2.6 s |
3.5 s |
−24% |
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Raw Data
<engine-database>
<engine-list>
<engine FDiv="10" FFix="1" FStep="-1." Isp="212.33" Itot="722.74595" Type="reloadable" auto-calc-cg="1" auto-calc-mass="1" avgThrust="249.222741" burn-time="2.9" cgDiv="10" cgFix="1" cgStep="-1." code="J270" delays="20,1000" dia="38." exitDia="0." initWt="686.8" len="384." mDiv="10" mFix="1" mStep="-1." massFrac="50.54" mfg="Ellis Mountain" peakThrust="441.3" propWt="347.1" tDiv="10" tFix="1" tStep="-1." throatDia="0.">
<comments>Corrected 2026-09-23; supersedes ThrustCurve.org simfile 5f4294d20002e900000003fa (user, RockSim).
Rise to 309 N moved to 0.05 s, matching the TC cert file for this motor.
</comments>
<data>
<eng-data cg="192." f="0" m="347.1" t="0"/>
<eng-data cg="192." f="308.91" m="343.391136" t="0.05"/>
<eng-data cg="192." f="419.24" m="334.648753" t="0.1"/>
<eng-data cg="192." f="441.3" m="324.316857" t="0.15"/>
<eng-data cg="192." f="397.17" m="314.249941" t="0.2"/>
<eng-data cg="192." f="375.11" m="295.7055" t="0.3"/>
<eng-data cg="192." f="353.04" m="290.46007" t="0.33"/>
<eng-data cg="192." f="330.98" m="98.28652" t="1.5"/>
<eng-data cg="192." f="286.85" m="38.943734" t="1.9"/>
<eng-data cg="192." f="165.49" m="28.08188" t="2"/>
<eng-data cg="192." f="110.33" m="21.458728" t="2.1"/>
<eng-data cg="192." f="66.19" m="4.503921" t="2.5"/>
<eng-data cg="192." f="22.07" m="1.324894" t="2.65"/>
<eng-data cg="192." f="0" m="0" t="2.9"/>
</data>
</engine>
</engine-list>
</engine-database>
You can also download the raw data points as a CSV file.
