[AR] Re: dynamic stability
- From: "Monroe L. King Jr." <monroe@xxxxxxxxxxxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Wed, 20 Aug 2014 17:10:58 -0700
Unless something has changed I'm unaware of. I'm pretty sure
Openrocket is not acceptable. I'd love to hear otherwise though.
Monroe
> -------- Original Message --------
> Subject: [AR] Re: dynamic stability
> From: "Troy Prideaux" <GEORDI@xxxxxxxxxxxxxxxx>
> Date: Wed, August 20, 2014 4:51 pm
> To: <arocket@xxxxxxxxxxxxx>
>
>
> Openrocket generates the graphs. Whether it's accepted or not I don't know.
>
> Troy
>
>
> >-----Original Message-----
> >From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
> >Behalf Of Monroe L. King Jr.
> >Sent: Thursday, 21 August 2014 9:27 AM
> >To: arocket@xxxxxxxxxxxxx
> >Subject: [AR] Re: dynamic stability
> >
> >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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