I have RSPro and we are regularly submitting 100k+ projects. RSPro does poor job of estimating drag, there are other tools useful for estimating drag. Is this a single stage of multistage airframe? K Ken Biba Novarum Managing Director and CTO +14155775496 > On Aug 21, 2014, at 10:28 AM, Carl Tedesco <ctedesco@xxxxxxxxxxxxxx> wrote: > > Thanks Richard, but this is for a liquid bi-propellant rocket, which I don't > believe Tripoli allows. > > This is for the university rocket project I mentor --- SDSU. I just looked > into Rocksim Pro and it is $1000 which is more than we can afford. Do any > Arocketeers have Rocksim Pro and would be willing to help out a University > team. > > --- Carl > >> On 8/20/2014 6:30 PM, Richard Hagensick wrote: >> If you belong to Tripoli Rocketry they have a Class 3 committee that will do >> the analysis for you and provide you with the paperwork you need to file >> your permit. They use Rocksim Pro. I submitted mine to the FAA for a 150K >> launch at BALLS this year. >> >> Richard Hagensick >> >> -----Original Message----- >> From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On >> Behalf Of Monroe L. King Jr. >> Sent: Wednesday, August 20, 2014 7:44 PM >> To: arocket@xxxxxxxxxxxxx >> Subject: [AR] Re: dynamic stability >> >> I don't think Flowmetrics flies under a TRA waiver for starters. The one >> launch I observed was an atlas vernier modification LOX and Hydrocarbon at >> FAR >> >> As I understand it Class 3 is "P" and above and you can bet they want a >> FULL 3 Sigma 6 degree of freedom analysis. >> >> AT a TRA event such as BALLS if you within a certain amount of their >> standing waiver for altitude you might get some benefit. But they are still >> going to require 3 sigma analysis (although you might get some help with it) >> and they in-turn are going to hand that to the FAA. >> >> Last I remember it's 14 points they look at during the analysis I have a >> list here somewhere. >> >> Monroe >> >>> -------- Original Message -------- >>> Subject: [AR] Re: dynamic stability >>> From: Carl Tedesco <ctedesco@xxxxxxxxxxxxxx> >>> Date: Wed, August 20, 2014 5:24 pm >>> To: arocket@xxxxxxxxxxxxx >>> >>> >>> That is what I wondered. From an aerospace engineering point of view, >>> dynamic stability looks to see how a rocket will respond when a >>> disturbance is imparted on it. CP/CG rules determine static stability, >>> albeit still important. So, the Tripoli example you mention suggests >>> that they just want to know how the CP and CG change throughout the >>> entire flight? >>> >>> Monroe, do they require they require 3-sigma or dispersion analysis? >>> Below is an excerpt of what I was emailed (looks like it was cut & >>> pasted from the FAA website). >>> >>> (a) Class 2---High-Power Rockets. When a Class 2---High-Power Rocket >>> requires a certificate of waiver or authorization, the person planning >>> the operation must provide the information below on each type of >>> rocket to the FAA at least 45 days before the proposed operation. The >>> FAA may request additional information if necessary to ensure the >>> proposed operations can be safely conducted. The information shall >>> include for each type of Class 2 rocket expected to be flown: >>> (1) Estimated number of rockets, >>> (2) Type of propulsion (liquid or solid), fuel(s) and oxidizer(s), >>> (3) Description of the launcher(s) planned to be used, including any >>> airborne platform(s), >>> (4) Description of recovery system, >>> (5) Highest altitude, above ground level, expected to be reached, >>> (6) Launch site latitude, longitude, and elevation, and >>> (7) Any additional safety procedures that will be followed. >>> (b) Class 3---Advanced High-Power Rockets. When a Class 3---Advanced >>> High-Power Rocket requires a certificate of waiver or authorization >>> the person planning the operation must provide the information below >>> for each type of rocket to the FAA at least 45 days before the >>> proposed operation. The FAA may request additional information if >>> necessary to ensure the proposed operations can be safely conducted. >>> The information shall include for each type of Class 3 rocket expected to >>> be flown: >>> (1) The information requirements of paragraph (a) of this section, >>> (2) Maximum possible range, >>> (3) The dynamic stability characteristics for the entire flight >>> profile, >>> (4) A description of all major rocket systems, including structural, >>> pneumatic, propellant, propulsion, ignition, electrical, avionics, >>> recovery, wind-weighting, flight control, and tracking, >>> (5) A description of other support equipment necessary for a safe >>> operation, >>> (6) The planned flight profile and sequence of events, >>> (7) All nominal impact areas, including those for any spent motors and >>> other discarded hardware, within three standard deviations of the mean >>> impact point, >>> (8) Launch commit criteria, >>> (9) Countdown procedures, and >>> (10) Mishap procedures. >>> >>> --- 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 > >