dhkaiser
Well-Known Member
- Joined
- Nov 27, 2014
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Descent rate: OR vs Alt3
Flew a Wildman Drago on my L1 flight with a Top Flight Recovery 36" parachute. This rocket weights in at 33.9oz no motor(BRB900 in the nosecone, a Chute Release and Alt3. OpenRocket says a ground hit rate of 18.5 ft/s. The Alt3 says it was 13 ft/s. Looking at the TFR web page I NOW see they recommend a 30" for a 2 lb rocket (1.75-3lb).
So why is OR so far off?
I also have a Madcow DX3 SD waiting for it's first flight. 44.6oz with the BRB900, CR and Alt3. OR says 17 ft/s with a 48" Rocketman chute, or 22 ft/s on a 36" Rocketman. Now I'm not sure which to use.
Flew a Wildman Drago on my L1 flight with a Top Flight Recovery 36" parachute. This rocket weights in at 33.9oz no motor(BRB900 in the nosecone, a Chute Release and Alt3. OpenRocket says a ground hit rate of 18.5 ft/s. The Alt3 says it was 13 ft/s. Looking at the TFR web page I NOW see they recommend a 30" for a 2 lb rocket (1.75-3lb).
So why is OR so far off?
I also have a Madcow DX3 SD waiting for it's first flight. 44.6oz with the BRB900, CR and Alt3. OR says 17 ft/s with a 48" Rocketman chute, or 22 ft/s on a 36" Rocketman. Now I'm not sure which to use.
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