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Showing results for tags 'hrss'.
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Hello everyone! Recently I've been messing around with HalfRSS mod (best decision ever!) and, of course, tried to recreate Flacon 9, both 1st and 2nd stage.I've found this sheethttps://docs.google.com/spreadsheets/d/1X9FUdHnowboCrjoWKpTM5OtLEqj26UWhF0UbEnON5_Q/edit?f=true&noheader=true&gid=18#gid=27 With pretty reasonable info about falcons parameters. I've scaled them down to be suitable, for HRSS, taking total delta-V as my base. Parameter | Falcon 9 | HRSS | Mine Total dV | 9380 | ~7200 | 7038 1st st dV | 3076 | ~2371 | 2369 2nd st dV | 6388 | ~4925 | 4669 With all this, i struggle to reach orbit. it seems that my 2nd stage has not nearly enough TWR to push craft to orbit. separation occurs somewhere between 40 - 50 km high (AP at 95-100km), and 2nd sdtage starts its burn right away. sadly no matter what pitch I set, 2nd stage doesn't even burn through half of its dV, until it falls back to atmosphere. What might be the reason for this? Is Falcon9 data I based inaccurate? or its HRRS fault (longer to reach AP in RSS than in HRSS?), or maybe my gravity turn is made badly? Cheers