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  #51  
Old 08-19-2015, 10:02 AM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
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Location: Claremont, CA "The intellectual capitol of the world."-WSJ
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Default Mixed subject photos

Here are some photos from the olden days.

A photo of Charles E. Rogers, Korey Kline and Jerry Irvine I would guess is from around 1984. The rocket on the pad is a multiple gravity gradient boom stability rocket. Some of you might feel it resembles a Satellite 62SL. Apparently both Korey and I have experienced abundant food since. The t-shirt seems to involve Canada and supersonics.

A photo of my Aerobee 350 scale model lifting off at a NAR sanctioned regional meet in Sunnyvale, CA hosted by BAYNAR (Doug Frost, Tom Shula, Jim Gracey). I can be seen on the left with my Enerjet t-shirt on. Squatting in the middle is Trip Barber who was a judge for the flight. To the right is Roger Johnson who is credited for inspiring Chris Pearson in naming LDRS after a meet-up at Smoke Creek, an amateur launch organized by Rocket Research Institute (RRI) (Chuck Piper, Ray Goodson RIP). The model used BT-70 upper and thickened BT-60 lower and was always flown active two stage with both stages recovering by chute. This one was probably a Crown (Mark Mayhle) E45-4 to an Estes (Vern Estes, Ed Brown) D12-5, using USR (Jerry Irvine) AIR-3 recommended "Discontinous Staging"-tm.

I believe it was that very launch where I also flew a 2 stage E6-0 to E6-8 to 1992 meters (6534 feet) for an F altitude world record. This would be shortly after the E6 was NAR certified. 1978?

A photo of Jerry Irvine with Built-Up which was also a kit plan in CRm. It is an 8 inch diameter foam disc, wood stringer and paper covering rocket about 8 feet tall. It weighs next to nothing. It flies on a single (Randy Sobczak and John Krell) Plasmajet G60-3. It had numerous successful flights and recovered by 8 foot plastic parachute. I have a Composite Dynamics (John Davis) t-shirt on. That's because I also flew it with CD G62-6 motors. About 1982.

This is my Centuri Saturn V with a dual cluster D mount in the rear. I believe the LCO is John Erickson (RIP). This configuration as well as three cluster D were made possible by a mount that went just outside the recessed mount of the Centuri kit. The optional plastic fins are used to assure stability. The escape tower is replaced with a previously damaged cone for flight, and after some flight damage it often became a Skylab with a chunk of BT-70. About 1970. Interestingly almost all of my Mighty D CATOs were in one of the many Saturn V's I had. I am pretty sure Mary Roberts at Estes got tired of my repeated defective motor submissions. While they consistently only blew up my coveted Centuri Saturn V's they replaced them with Estes product. Those went to the more active kids at rocket club.

Catching of rockets was not only encouraged, but is fun! In the 1970 photo Eric Ferm, Jerry Irvine, Vince Palmire. I caught the lower part and Eric caught the upper part of the Saturn V.

Jerry

cite:
http://v-serv.com/usr/genesis.htm
http://forums.rocketshoppe.com/showthread.php?t=14918
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Last edited by Jerry Irvine : 08-21-2015 at 10:09 AM.
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  #52  
Old 08-19-2015, 02:36 PM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
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Default

So many of the posters at the various sites boldly admit they are mainly into MR (LPR) (under a pound) and LMR (MPR) (under 3.3 lb) so they can fly at their local fields.

Another category of rocket that can do that is Big Dumb Rockets (BDR) HPR. My reference sample was the Built-Up shown in the recent message. In addition to that I consider the El Lubbo and its scaled up brothers to be BDR class rockets so you can fly low end HPR in local fields. 125g or a 240H is FAA exempt. Even a J in a bigger rocket doesn't go very high, but is very impressive to spectators indeed. FAA waivers are free. However a rocket that is both under 3.3 lb and 125g propellant is FAA exempt LMR.

Jerry

http://v-serv.com/usr/kits/el_lubbo3.htm

http://v-serv.com/usr/kits/mega-roc.htm

http://v-serv.com/usr/kits/BBR.htm

http://v-serv.com/usr/kits/fatso.htm

cite:
http://v-serv.com/FAA/BDR/index.htm

Last edited by Jerry Irvine : 08-20-2015 at 08:49 AM.
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  #53  
Old 08-20-2015, 09:05 AM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
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Location: Claremont, CA "The intellectual capitol of the world."-WSJ
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Default

One of the subjects of my posts replied regarding my signature link as follows:

Off topic, I read your article about the economy. You are absolutely right-on. Given that we survive the dictator's reign of terror, I pray that the 2016 election results in our having a president who actually loves America, abides by the United States Constitution, and tries to help our citizens pursue happiness.

To which I responded:

Thanks for your supportive comments on my fiscal commentary. The current administration actually uses economic levers for malicious purposes. A crisis is a terrible thing to waste, and apparently to loose, with traditional economic policies.

Jerry

The attached image is from a rocket demonstration at Our Lady of the Assumption Catholic school. On the left is Andy Alexis and announcing is Clay Smith. Andy went into State wildlife resource control and Clay owns a cabinet shop serving tract homes. Not shown is Ted Robinson who worked for OLA and also the City of Claremont and arranged that day's demonstration in 1970. See message #1 for more related photos.

Everything involving Clay seemed to be lime green, Rockets, launch pads, even his RX-2.

The Tall Tail Ten rocket shown is made from 2 BT-70 to 2 BT-60 to 2 BT-55. It separates above the BT-70 and recovers in two pieces.
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Last edited by Jerry Irvine : 08-20-2015 at 01:24 PM.
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  #54  
Old 08-20-2015, 10:07 AM
AstronMike AstronMike is offline
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Default Neat stuff, Jerry

Thanks for posting all of this way cool 'oldie' stuff here! Reminds me of the mid-70's to mid-80's flair of things.....

It's funny how MPR nowadays is pretty much defined as 'HPR minus', since it's mainly heavier walled BT's and such. Really liked making do with lighter stuff 30 years ago...even the so-called flimsy 3" diameter gift-wrap rolls would hold up fine with a *little* necessary reinforcement.

Or, using BT101's and 80's a lot. Had a rocket using a 101 lower section adapting to 2x80 upper section. Adapter shroud was, of all things, a quart KFC foam cup! Fit perfectly too. That rocket, topped with the venerable PNC-80K, was flyable on an F25 or such up to reasonable G's. Great parasite glider carrier as well.
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  #55  
Old 08-20-2015, 12:02 PM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
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Default

Quote:
Originally Posted by AstronMike
Or, using BT101's and 80's a lot. Had a rocket using a 101 lower section adapting to 2x80 upper section.

http://v-serv.com/usr/kits/stiletto.htm

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  #56  
Old 08-20-2015, 09:33 PM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
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Location: Claremont, CA "The intellectual capitol of the world."-WSJ
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Default Mixed times

USR FNC-60 6.25" x 24" parabolic fiberglass nose cone. First made about 1982 and several molds later we are reproducing them again in 2015.

USR SU 160G, RL 29mm 120 2G, RL 38mm 120 1G. 1992.

Test site. 2014. It's a Weather Underground site and has site wide wifi.

Test site sign. Fair warning!

"Son, your ego is writing checks your body can't cash." - Top Gun. Not these guys. If we say launch your car we mean it!

Jerry

cite:
http://www.wunderground.com/persona...rd?ID=KCACANTI2
http://www.imdb.com/name/nm0410190/?ref_=fn_al_nm_1
http://v-serv.com/usr/fx-topgun.htm
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Last edited by Jerry Irvine : 08-21-2015 at 12:29 PM.
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  #57  
Old 08-21-2015, 12:50 PM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
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Join Date: Jan 2008
Location: Claremont, CA "The intellectual capitol of the world."-WSJ
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Default And the hits keep coming

Do any rocket scientists detect any CG issues here?

3 motors on top, then 2 motors out back, then four motors out back, twice.

A BAR knows more than a Mythbuster.

Just Jerry

Actual, real JATO cite (23KS11000):
http://www.astronautix.com/lvs/jato.htm
http://www.astronautix.com/mfrs/aerojet.htm
http://www.astronautix.com/engines/23k11000.htm

Gross mass: 500 kg (1,100 lb).
Unfuelled mass: 200 kg (440 lb).
Height: 1.90 m (6.20 ft).
Diameter: 0.52 m (1.70 ft).
Thrust: 49.00 kN (11,015 lbf).
Burn time: 23 s

700# pro. 12.4" x 74.4" motor. Hmmm. I have made bigger.

I think we can agree the thrust to weight ratio of a 1964 Impala with 11,000 lb thrust for 23 seconds is near transonic.
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Last edited by Jerry Irvine : 08-22-2015 at 10:29 AM.
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  #58  
Old 04-05-2017, 11:00 AM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
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Default

I know this thread was very popular, so I am bumping it a bit.

http://v-serv.com/usr/kits/2650.htm

http://v-serv.com/usr/prototype/acesquid.htm

Jerry
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  #59  
Old 04-05-2017, 11:40 AM
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astronwolf astronwolf is offline
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Default

This is a great thread. It should be moved out of "Free For All" to the Rocket History section.
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  #60  
Old 04-05-2017, 01:46 PM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
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Default

I agree.
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