[AR] Re: mad cow rocketry Jayhawk
- From: Bill Claybaugh <wclaybaugh2@xxxxxxxxxx>
- To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
- Date: Mon, 1 Sep 2014 18:39:10 -0400
Bert:
The plastic vs. balsa nose cone should have no effect on Cp if they are the
same shape.
Just looking at the cartoon it is easy to predict that this design will be far
more stable if you loose the canards.
I recall that RocSim does calculate Cp from the nose.
Bill
Sent from my iPhone
On Sep 1, 2014, at 15:55, Bert Kimpe <bert.kimpe@xxxxxxxxx> wrote:
> A few years ago I bought a model rocket kit from apogee.
> Info:
> http://www.apogeerockets.com/Rocket_Kits/Skill_Level_3_Kits/Jay_Hawk_AQM-37A
>
> Usually I don't buy rocket components but I intend to upscale the design 2 or
> 3 times so it was convenient to have a almost ready made kit to start from.
>
> I was only wondering if anyone can confirm the centre of pressure in the
> drawing below.
> I have the rocksim design file but I have my doubts if the numbers are
> correct.
> Does rocksim calculate the distances from the tip of the nosecone or am I
> missing something here?
>
> The kit now changed from a balsa nose cone to a plastic one, so this might
> influence the CP.
>
> Does anybody have experience with this (old version of the) kit and what CP
> and CG did you use for launch?
>
>
> <mime-attachment.jpg>
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