Tim51
Well-Known Member
Hi All
This is probably a case of a bad rocketeer (i.e. me) blaming his software tools but I'm getting big discrepancies in predicted results from OpenRocket sims vs Thrust Curve. For example, Thrust Curve simulates my specs for a 57.4 mm diameter rocket with a dry weight of 737g reaching an impressive 3223m / 10,574ft on a CTI 644-J94 (38mm of course). The same rocket with the same motor on OR achieves not even half that - 1410m / 4626ft. I've double checked all relevant points of comparison, including finish, dry weight etc.
Otherwise there is nothing particularly unusual about my design - basically a Loc Vulcanite file, but with a VK 5:1 nosecone and slightly modified fins.
Can anyone suggest where I maybe going wrong, please..?
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UKRA #1895 L1
This is probably a case of a bad rocketeer (i.e. me) blaming his software tools but I'm getting big discrepancies in predicted results from OpenRocket sims vs Thrust Curve. For example, Thrust Curve simulates my specs for a 57.4 mm diameter rocket with a dry weight of 737g reaching an impressive 3223m / 10,574ft on a CTI 644-J94 (38mm of course). The same rocket with the same motor on OR achieves not even half that - 1410m / 4626ft. I've double checked all relevant points of comparison, including finish, dry weight etc.
Otherwise there is nothing particularly unusual about my design - basically a Loc Vulcanite file, but with a VK 5:1 nosecone and slightly modified fins.
Can anyone suggest where I maybe going wrong, please..?
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UKRA #1895 L1