I have both... one more time... I HAVE BOTH
I have RocSim 10 (paid version in other words) That's what I used to simulate my L1 cert rocket including the mods I made (LOC IV). The cert went fine. The sim max altitude was 5377.43' (1,639m). Actual altitude at apogee was 4,541' (1,384m) altitude from the AltusMetrum 3,0. The correct weight was entered (the rocket was weighed a lot times). The measured Cg was located with a string and I feel very confident about that. Weather wasn't "special". Winds were very low. No humidity to speak of. The rocket left the rail and appeared to track true (until we couldn't see it). I flew it on a Cesaroni I350SS. 836' (255m) seems like a lot of "error" to me. This was the first rocket that I've flown with electronics.
So now that we know that I have both pieces of software and that RocSim was off... make that could have been off... by 836' (255m), should I switch to Open Rocket?
To be fair I could have made an error setting up the simulation. Weight and Cg match actuals though. I used the LOC IV rkt file from LOC and only changed the weight and Cg and added the motor. 836' error (255m) 12. -15.5% difference. To me that's a big deal.
Since I'm not overly confident in RocSim I was thinking about switching to Open Rocket. The thing that's stopping me is physics is physics (or maybe fizzicks is fizzicks?). The equations used in both pieces of software are probably the same. Is there any benefit to changing? Or am I overlooking something that could have affected apogee by -15.5%?
I have RocSim 10 (paid version in other words) That's what I used to simulate my L1 cert rocket including the mods I made (LOC IV). The cert went fine. The sim max altitude was 5377.43' (1,639m). Actual altitude at apogee was 4,541' (1,384m) altitude from the AltusMetrum 3,0. The correct weight was entered (the rocket was weighed a lot times). The measured Cg was located with a string and I feel very confident about that. Weather wasn't "special". Winds were very low. No humidity to speak of. The rocket left the rail and appeared to track true (until we couldn't see it). I flew it on a Cesaroni I350SS. 836' (255m) seems like a lot of "error" to me. This was the first rocket that I've flown with electronics.
So now that we know that I have both pieces of software and that RocSim was off... make that could have been off... by 836' (255m), should I switch to Open Rocket?
To be fair I could have made an error setting up the simulation. Weight and Cg match actuals though. I used the LOC IV rkt file from LOC and only changed the weight and Cg and added the motor. 836' error (255m) 12. -15.5% difference. To me that's a big deal.
Since I'm not overly confident in RocSim I was thinking about switching to Open Rocket. The thing that's stopping me is physics is physics (or maybe fizzicks is fizzicks?). The equations used in both pieces of software are probably the same. Is there any benefit to changing? Or am I overlooking something that could have affected apogee by -15.5%?