Rogers Aeroscience seeking LDRS Mach Madness fliers

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2008 Archived News by Rogers Aeroscience
Thursday, July 10, 2008
WORLD WIDE WEB — Rogers Aeroscience is looking for rocketeers who will be competing in the Tripoli Mach Challenge contest at LDRS who would be interested in running the RASAero aerodynamic prediction and flight simulation software to design their rockets, predict their performance, and provide us with flight data from their max Mach attempts from the contest. A Beta test version of the RASAero software will be provided, and additional technical support at your request, to help you increase your rocket max Mach number for the contest. The RASAero software features very accurate transonic, supersonic, and hypersonic drag coefficient predictions based on the geometry of the rocket body and fins. Design trades such as trading increased nose cone L/D (for lower wave drag) with increased nose cone weight, supersonic stability for minimizing fin size, fin sweep trades based on fin wave drag and fin supersonic CNalpha; can all be accomplished using RASAero's aerodynamic prediction and flight simulation capabilities. The RASAero fin airfoil selection includes eight different airfoils, five of which are optimized for supersonic (and hypersonic) Mach numbers. If you're interested respond to This email address is being protected from spam bots, you need Javascript enabled to view it . Our only requests are for accurate geometry data for your rocket, an accurate pre-launch weight, and access to your flight data. Reader comments: #1 Re: Rogers Aeroscience seeking LDRS Mach Madness fliers Most excellent. It will be very interesting to see what kind of agreement the new software will have at these wild and woolly speeds. What many of us are using is good, even very good up to mach, but the data and methodology is what about 50 years old? High time for a face lift. denverdoc on 07-11-2008 03:12 AM #2 Re: Rogers Aeroscience seeking LDRS Mach Madness fliers Yea! I'm still using Alt4, and the rest of the Rogers Aeroscience package. I had emailed Chuck about rumors of an update to a Windows based program a couple of years ago. Any idea when this will be released, and how much it will cost? Sono_6 on 07-11-2008 07:11 AM #3 Re: Rogers Aeroscience seeking LDRS Mach Madness fliers Quote: Yea! I'm still using Alt4, and the rest of the Rogers Aeroscience package. I had emailed Chuck about rumors of an update to a Windows based program a couple of years ago. Any idea when this will be released, and how much it will cost? Not sure if this answers your question but when I contacted Chuck he sent me a beta version of his software and it loaded right onto a HP DV9500T laptop with 4 gig of memory and running a 64 bit version of Windows Vista Ultimate. Andrew agrippo on 07-13-2008 05:56 AM #4 Re: Rogers Aeroscience seeking LDRS Mach Madness fliers I'm using this beta and I cannot find a way to model multi-stage rockets - I may be overlooking something. It is my understanding that a lot of the rockets for Mach Madness are staged. Is there a trick to making this software model a multistage rocket? UncleVanya on 07-16-2008 09:54 AM #5 Re: Rogers Aeroscience seeking LDRS Mach Madness fliers Quote: I'm using this beta and I cannot find a way to model multi-stage rockets - I may be overlooking something. It is my understanding that a lot of the rockets for Mach Madness are staged. Is there a trick to making this software model a multistage rocket? Use the "Jerry" option? 8 print "DO YOU WISH TO RUN ALT2 (SINGLE/BOOSTER STAGE) VERSION " 9 input "OR JERRY (UPPER STAGE) VERSION? (ALT2=1 JERRY=2) ";rrr At least this was the code from ALT 2 and ALT3. Not sure about ALT4 because despite my several "licenses" I have not been given a copy of ALT4 by "Rogers Aeroscience". I sure would appreciate two. Jerry Just Jerry on 07-16-2008 10:36 AM #6 Re: Rogers Aeroscience seeking LDRS Mach Madness fliers Quote: Use the "Jerry" option? 8 print "DO YOU WISH TO RUN ALT2 (SINGLE/BOOSTER STAGE) VERSION " 9 input "OR JERRY (UPPER STAGE) VERSION? (ALT2=1 JERRY=2) ";rrr Jerry I'm dense. What do you mean? I was thinking that one way to fake this would be to create a motor profile that gets the upper stage up to the speed and altitude (that the whole rocket simulation shows for the first stage motor) and then has the rest of the real motor profile for stage 2 built into it - but that would involve a lot of trial and error. UncleVanya on 07-16-2008 10:42 AM #7 Re: Rogers Aeroscience seeking LDRS Mach Madness fliers Quote: I'm dense. What do you mean? I was thinking that one way to fake this would be to create a motor profile that gets the upper stage up to the speed and altitude (that the whole rocket simulation shows for the first stage motor) and then has the rest of the real motor profile for stage 2 built into it - but that would involve a lot of trial and error. If ALT4 doesn't work, maybe you could use a copy of ALT2 which definitely does. ALT4 has prettier graphs. Jerry Just Jerry on 07-16-2008 10:53 AM #8 Re: Rogers Aeroscience seeking LDRS Mach Madness fliers I believe UV has access only to the new Beta version. Anyone out there with other ideas? denverdoc on 07-16-2008 02:06 PM #9 Re: Rogers Aeroscience seeking LDRS Mach Madness fliers Quote: Currently the RASAero software accepts geometry for single stage rockets with a single set of fins. I had assumed JI's ref to ALT2 and ALT4 meant something else. What does that stand for? UncleVanya on 07-16-2008 02:10 PM #10 Re: Rogers Aeroscience seeking LDRS Mach Madness fliers Prior (DOS) versions of the Rogers aeroscience program. edit Actually just the flight simulation portion of the suite. I was just running it. You should see what it says my Mongoose 54 should do on a Loki L1400 Sono_6 on 07-16-2008 02:16 PM Comments 1-10 of 19 shown. Click here to read comments 11 through 19. Registered users can add comments and discuss this article. To participate, please login or register.