K888-BM Data (RockSim)
Accuracy of this data file:
| |
This File |
Certified |
± |
| Diameter |
75 mm |
76 mm |
−1% |
| Length |
991 mm |
1,016 mm |
−2% |
| Prop. Weight |
2,100 g |
625 g |
+236% |
| Total Weight |
4,100 g |
4,173 g |
−2% |
| Avg. Thrust |
938.5 N |
896.0 N |
+5% |
| Max. Thrust |
1,365.0 N |
3,024.8 N |
−55% |
| Total Impulse |
2,451.8 Ns |
2,400.0 Ns |
+2% |
| Burn Time |
2.6 s |
2.7 s |
−2% |
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Raw Data
<engine-database>
<engine-list>
<engine FDiv="10" FFix="1" FStep="-1." Isp="119.38" Itot="2458.58" Type="hybrid" auto-calc-cg="1" auto-calc-mass="1" avgThrust="910.585" burn-time="2.7" cgDiv="10" cgFix="1" cgStep="-1." code="K888" delays="1000" dia="75." exitDia="0." initWt="4100." len="990.6" mDiv="10" mFix="1" mStep="-1." massFrac="51.22" mfg="Contrail" peakThrust="1365." propWt="2100." tDiv="10" tFix="1" tStep="-1." throatDia="0.">
<comments>Corrected 2026-09-23 from ThrustCurve.org simfile 5f4294d20002e9000000032f (user, RockSim).
Separated repeated timestamp(s): t=0 s (2 points moved to 0, 0.01 s). Each jump now takes at most 0.01 s instead of zero time; no thrust value changed.
Contrail Rockets Hybrid Rocket Motor (K888)
75mm-2000cc Hardware with Medium Injector Kit and Nozzle
Black Smoke Reload
Data Input By Tom R. Sanders of Contrail Rockets LLC.
</comments>
<data>
<eng-data cg="495.3" f="0." m="2100." t="0."/>
<eng-data cg="495.3" f="1365." m="2100." t="0.01"/>
<eng-data cg="495.3" f="1365." m="1517.04" t="0.5"/>
<eng-data cg="495.3" f="1069.77" m="954.045" t="1.04143"/>
<eng-data cg="495.3" f="434.109" m="19.0464" t="2.4972"/>
<eng-data cg="495.3" f="124.031" m="8.3699" t="2.54199"/>
<eng-data cg="495.3" f="0." m="0." t="2.7"/>
</data>
</engine>
</engine-list>
</engine-database>
You can also download the raw data points as a CSV file.
