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#141
10-05-2005, 10:27 PM
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Let's see... I said famous, not infamous... Describe this rocket... Is this one that goes nowhere very fast, makes a lot of noise but says nothing truly memorable, produces a lot of smoke and flash, but gives no lasting performance?  Sort of like the Estes Maxi Brute Pershing?
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635 
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#142
10-05-2005, 10:28 PM
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Quote:
At least the Pershing is good looking. Courtney could be the poster child for body odor.
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Bill Eichelberger NAR 79563 http://wallyum.blogspot.com/ I miss being SAM 0058 Build floor: Centuri Mini Dactyl Estes - Low Boom SST Semroc - Marauder, Shrike, SST Shuttle In paint: Canaroc Starfighter Scorpion Estes F-22 Air Superiority Fighter, Multi-Roc, Solar Sailer II Semroc Cyber III Ready to fly: Estes - Solar Sailer II Semroc - Earmark, Groonie Der V 1/2
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#143
10-05-2005, 10:33 PM
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Quote:
I'll give it that. It does look like a rocket...
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635
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#144
10-06-2005, 12:53 AM
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Revised Plan -- CSL Murray
Some slight mods here, mostly to beef up the two passage pipes. I also needed to adjust the two side wings a little to get some additional stability which was lost when I added the stiffeners. Third mod was to increase the length of the top/bottom motor housings by one inch. This allows more passageway opening between the tubes, and a 3" contact area.
I was a little nervous about the use of ST-5 tubing by themselves for those passage tubes, but I really didn't want to increase them to ST-7. Too large, and the gap between them is part of the styling effect... Anyway, RS updates as follows: Max Alt.....740' Deployment V.....8.33 fps Weight.....4.16 oz empty Stability margin.....1.33, with two C6-5s loaded Length.....37.75" Flight Speed reached at 28.5"
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635
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#145
11-21-2005, 10:06 PM
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New Plan -- Privateer
Futuristic interstellar pirate raider...
Use only the C6-5 motor for this model, and it will require a 48" launch rod... 680' altitude, deployment-V is a very soft 2.1 FPS... Enjoy!
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635
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#146
11-23-2005, 09:22 PM
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New Plan -- Cherokee J6
OK, all you Cherokee-D, Double-D, Triple-D, and anything related, fans...
This version is NOT intended for the feint-of-heart (or feint-of-wallet) types. It is also not intended for general release as a PDF anytime soon. I really need some of you HPR folks to evaluate the construction of this one, keeping in mind that none of the body components actually exist in the wild (only as a RockSim file for now). The nose cone, couplers and rings, and body tubes have no current manufacturer, but that doesn't mean it can't be done. The version presented in this file is a true 4X upscale of the BT-55 CDD, and is more of an academic exercise than anything else. My suspicions are that the airframe is rather weak and probably would not withstand the stress of one flight. However, those of you with real-world experience in HPR construction can study the parts and tell me what I might want to improve upon. Important note: I have not included any recovery devices in the booster stage, meaning that as shown, the booster free-falls, which may be from a considerable altitude. I am considering a slight lengthening of the booster body to accomodate a small drogue parachute, but this version does not include one. Here's some text specs: Motors -- (6) Aerotech Reloadable J-135W with no ejection charges. Electronics -- One altimeter for the parachute deployment, one accelerometer for the sustainer ignition. Length -- 124.5" Diameter -- 5.3" Weight -- 202 oz Fin Span -- 24" Deployment V -- 22.5 FPS <--- Not really bad for a rocket this size! Max Altitude -- 14,700' The rocket as shown here also requires a 12' (144") launch tower to ensure flight stability. It will take nearly every inch of this tower to reach the correct flight velocity! It's your turn, now. I just had to get this one out of my system. 
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635 Last edited by CPMcGraw : 11-23-2005 at 09:25 PM. Reason: Motors...
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#147
11-24-2005, 05:29 PM
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Off the bat Craig I say it's doable, but you're right. It'd be expen$ive! Not to create more work for you
 , but if you design a 3X Cherokee you can use 4" LOC tubing and the 4" Ace nose cone. That's within my budget and I'd build one of those.
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Quando Omni Flunkus Moritati
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#148
11-24-2005, 10:26 PM
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Quote:
I thought I had, but I'll go back and look through my files. Sounds like another simulation to run...
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635
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#149
11-24-2005, 11:03 PM
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Updated 4X CDD
All,
I've gone through the 4X version and basically redesigned it from end-to-end. One of the things I really wanted to simplify was the motor configuration. Six reloadable motors gives me a lot of power to work with, but it also multiplies the failure chances by a higher margin than I feel comfortable with. This revision reduces the ignition risks back to two motors -- both "L-330" reloadables. Again, the booster is a simple ground-fired motor, and the sustainer is air-started by an accelerometer. The booster still does not have an adaquate recovery device built in yet, so that is one area I need to address. The nose cone for this version was changed from a hollow plastic to a hollowed hard maple cone with a 3/8" thick shell. A solid maple cone is too heavy. Hollowing out the center might prove to be a challenge, but I think this could be turned on a large lathe more quickly than trying to get a polystyrene cone fabricated... One additional note about the weight. The listed weight does not take into consideration what the final finish might add to the total. If we're talking about a simple filler-primer-paint style of finish, the weight shouldn't be that much. But a glassed finish might change these numbers considerably. The upside of a glass finish is that it would strengthen the outer tube a little and possibly give it more resilience against a rough landing. The booster body tube was again lengthened to 18" to accomodate the motor, and this also gives much more room for the addition of a parachute compartment and an altimeter deployment system via a side compartment. Alternately, using a delay charge on the motor and having that pressurize the compartment would eliminate the additional weight of the electronics. Isn't that a strange turn of design -- having a booster motor with a delay charge, and no delay or charge on the sustainer? RockSim gives me some really interesting flight data... The booster continues upward beyond the separation point to an altitude of over one mile before arcing over. Sustainer apogee occurs before the booster reaches the ground (in tumble mode). Altitude -- 16,300' (over three miles)... Time to apogee -- 33 seconds... Motors -- (2) Ellis Mountain L-330W reloadables... Stability margin with motors -- 2... Empty weight -- 140.5 oz (or 8.75 lbs)... Weight with motors -- 310 oz (or 19.375 lbs)... Deployment V -- 1.31 FPS <--- Remarkable deployment velocity; very safe condition! Flight V reached at 109", so it still needs that 12' launch tower. It's travelling at 51 FPS when it exits the tower 0.5 seconds after ignition. If the 2D flight profile is any indicator, this is a relatively slow liftoff, but with 8-second burn times on these motors, the launch ought to be spectacular. Once again, I would appreciate comments on this beast. I'm trying to learn about HPR construction, so anything you guys with experience can offer will be taken to heart!
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Craig McGraw BARCLONE Rocketry -- http://barclone.rocketshoppe.com BARCLONE Blogsite -- http://barclone.wordpress.com BARCLONE Forum -- BARCLONE Forum BARs helping BARs SAM 0044 AMA 352635
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#150
11-25-2005, 08:50 AM
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Quote:
If you made a 4" version already I missed it. I like the newer config with two EM L330's sweeeeeeeeet!
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