conical stability simulation in open rocket?

RKeller · Aug 30, 2014

ok, I'm messing with ideas and have some questions. I see there is an up cup rocket that is stable due to is geometry. can a similar geometry work but with a round nose instead of flat? I tried creating one in open rocket but the center of pressure is really forward. why?

Ravenex · Aug 30, 2014

Under design attributes are you using the Barrowman stability equations for calculation or the rocksim equations? The Barrowman are default but for this design the rocksim will be more appropriate.

For more information:
https://www.apogeerockets.com/downloads/Newsletter238.pdf

RKeller · Aug 30, 2014

can that be changed in open rocket?

Area66 · Aug 30, 2014

RKeller said:
ok, I'm messing with ideas and have some questions. I see there is an up cup rocket that is stable due to is geometry. can a similar geometry work but with a round nose instead of flat? I tried creating one in open rocket but the center of pressure is really forward. why?
View attachment 182887

send me you rkt file I will make a mod

Ravenex · Aug 30, 2014

I'm sorry I misread your post and thought you were in rocksim, that will teach me to pay more attention. Not sure about open rocket.

RKeller · Aug 30, 2014

Area66 said:
send me you rkt file I will make a mod

here is the file... what can you do to mod it?

View attachment round_nose_conical.ork

RKeller · Aug 30, 2014

Ravenex said:
I'm sorry I misread your post and thought you were in rocksim, that will teach me to pay more attention. Not sure about open rocket.

I figured, but thanks for the link. It was helpful.

Area66 · Aug 30, 2014

Your design will have a lot of drag in the AFT, I add a cone to simulate this drag , you don't add the cone to the real it's only use for trick Open Rocket

RKeller · Aug 30, 2014

hey that's a nifty trick. will the CP actually be behind the rocket?

conical stability simulation in open rocket?

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