[AR] Re: dynamic stability
- From: "Monroe L. King Jr." <monroe@xxxxxxxxxxxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Wed, 20 Aug 2014 16:27:01 -0700
There are no currently available programs (or popular for that matter)
like you speak of. Rocksim Pro is the only viable program I know of
unless you can name another that cost less than a grand.
TAOS is not popular and has a learning curve that's pretty steep.
So I have no Idea what you could be speaking about.
There is no question here about CP or flight dynamics. It's about
solving a very real problem of software available to solve a very real
problem. A way to get certification for a real flight.
Monroe
> -------- Original Message --------
> Subject: [AR] Re: dynamic stability
> From: "Troy Prideaux" <GEORDI@xxxxxxxxxxxxxxxx>
> Date: Wed, August 20, 2014 3:31 pm
> To: <arocket@xxxxxxxxxxxxx>
>
>
> As I understand it, most of the currently available popular software programs
> will provide you with it - how accurate they are for high mach numbers is
> anyone's guess. I think it's primary about the shift in the cp over various
> mach numbers and the software programs will generally tell you (for most
> conventional rockets) that the cp will move forward with increasing mach
> numbers which is generally the opposite to conventional fixed wing aircraft.
> This cp shift has apparently caught many HPR flyers out who were pushing the
> limits of acceleration and velocity flight profiles by transitioning from a
> stable configuration to unstable even though the cg generally shifts forward
> for typical solid propelled rockets.
>
> Troy.
>
> >-----Original Message-----
> >From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
> >Behalf Of Carl Tedesco
> >Sent: Thursday, 21 August 2014 7:46 AM
> >To: arocket@xxxxxxxxxxxxx
> >Subject: [AR] dynamic stability
> >
> >I am starting the process for getting a class 3 waiver for a rocket
> >launch. Most of the FAA required documentation looks straight forward.
> >One piece of information they require is "The dynamic stability
> >characteristics for the entire flight profile." A static stability
> >analysis is straight-forward, but I have never done a dynamic stability
> >analysis.
> >
> >How have folks on this list addressed this requirement? Is this software
> >driven analysis or just hand-calculations? Does anyone have an analysis
> >they could share? If software analysis is the norm, can anyone point me
> >to affordable software?
> >
> >--- Carl
> >
> >--
> >Carl Tedesco
> >Flometrics, Inc.
> >5900 Sea Lion Place, Suite 150
> >Carlsbad, CA 92010
> >tel: 760-476-2770 ext. 515
> >fax: 760-476-2763
> >ctedesco@xxxxxxxxxxxxxx
> >www.flometrics.com
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