cornyl
Well-Known Member
- Joined
- Jan 18, 2009
- Messages
- 331
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Hi All,
Is it possible for a standard rocket ( 3 fins,tube,nosecone) to be stable and not pass the swing test?
I'm working on some basic designs for PD and SD for Naram next week.
I built a clone design from plans that is not stable at all according the swing test.
Have you ever seen designs that rocsim or calculations or cardboard cutout say they are unstable and they do not swing test well but actually fly well.
The cp is about 3 calibers ahead of the cp. Which is reaally unstable. I do not want to add wieght to the nose of this model but to get this model stable I will have to make the fins much larger.
All the PD and SD plans I have seen have really small fins. I suspect these plans call for adding lots of nose wieght.
Thanks,
CornyL
Is it possible for a standard rocket ( 3 fins,tube,nosecone) to be stable and not pass the swing test?
I'm working on some basic designs for PD and SD for Naram next week.
I built a clone design from plans that is not stable at all according the swing test.
Have you ever seen designs that rocsim or calculations or cardboard cutout say they are unstable and they do not swing test well but actually fly well.
The cp is about 3 calibers ahead of the cp. Which is reaally unstable. I do not want to add wieght to the nose of this model but to get this model stable I will have to make the fins much larger.
All the PD and SD plans I have seen have really small fins. I suspect these plans call for adding lots of nose wieght.
Thanks,
CornyL