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Genesis of LMR & HPR.
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I will mention that those reloads Jerry has been talking about are really quite impressive. I've flown about 5 of the H motors (H180 and H240). What is equally impressive is how over-engineered Aerotech reloads are. It would take a bit of time to explain the differences here, but trust me...Jerry's reloads come with nothing more than a nozzle, some grains and a liner and it still works! The key is in the design of the aft closure. This is a very simple system. Now my only complaint. I lost my closures to a failed motor retention system. Sob. -Ted Proseus 7-00 |
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From: dwright@universal.dca.net (Darren Wright) Subject: Kudos to Jerry Irvine Newsgroups: rec.models.rockets Date: 7 Apr 2001 18:58:41 -0400 I flew some of Jerry's motors in the past, but never his Reloads. Today I flew an H360 Buttkicker load for the 29/180 casing. His closures fit the Dr. Rocket casings better than the Dr Rocket closures. Assembly is 1/2 the time of an Aerotech load. Really simple and nicely built. The load was a wee bit underpowered and a little longer burn, but still a magnificent H motor. 38mm anyone? Ha....I'll be flying more of these! -Darren |
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From: badbill@gamma494.com Newsgroups: rec.models.rockets Subject: Re: Kudos to Jerry Irvine Date: Sun, 08 Apr 2001 00:53:33 GMT I hate to, but I have to agree or I'd be lying. I have launched the Whitestar reloads ( they were NOT underpowered :-) and they are simple and work perfectly. I am now making my own grains & AT liners for the USR end closures. Simple & elegant. elegant? Bill Davenport AMA 28141 |
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From: "Justin Gleiter" Newsgroups: rec.models.rockets Subject: Re: Kudos to Jerry Irvine Date: Sun, 08 Apr 2001 01:03:18 GMT I got a chance to fly a couple of the H480 loads last weekend. Nice design, but it could use a couple improvments in the reload kits. ... but still, the BK propellant is very nice stuff. Clean and powerful with a nice flame. I'm waiting for [dealer] to get in the 960 n/s J1200 BK. That would fly well in a 7 pound rocket, ya think? I have another H480 ready to go in my Lil' Nuke tomorrow for a speedy flight. Justin Gleiter TRA# 2898 L3 http://astro.temple.edu/~jgleiter |
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Let's see if I have this straight. You use USR closures (forward and aft) and their reload and an [Aerotech or ISP or Dr. Rocket] case? - Kurt Kesler 7-00 |
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Yeah that's right. You better believe when I saw that forward closure design and showed it around NOBODY thought it would work. There is NO delay liner and NO delay o-ring. Darn things work though. I've seen about a dozen of them total and they all worked fine. If they were certified [again] , etc. I think they would be very popular. -Ted Proseus 7-00 |
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Yes, I did see more failures [1991-3] than the current level from Aerotech as well, for whatever reason. And just for clarity, I should point out that my comments are just based on my own, somewhat limited, experiences with motors from both companies, and that I was generally pleased with both the quality and the level of service from either company. Also the Firestarters are the coolest motors of all time IMHO. [in my humble opinion] - Ray Dunakin 7-00 |
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Hey Jerry, how's it going? All the motors you sold us worked GREAT! Had a great time. - Jeff Jacob 7-00 |
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Hello Mr. Jerry Irvine, it's Dave of Maryland Tripoli now called Maryland/Delaware Rocketry Association. I have launched some of your motors and think they are real cool. Joe May and myself invite you to come to one of our launches. We will pick up the cost of the plane ticket. Hope you bring a steamer trunk of goodies. Here on the east coast you have quite a following. Keep the pointy end up and the fiery end down! Have fun. - Dave Bullis 6-00 U.S. Rockets Whitestar-tm powering Joe's 65 pound L750 rocket. |
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Subject: Re: The 54/2560 needs another load too! Yeah you should see his Stardust / Firestarter reloads!!!!! -Darren Wright 8-00 |
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Today was the annual rocket launch that caps my student's study of the Cold War and the Space Race. The students left for the dry lake at 6:00 AM and we were set up and flying by 7:30. Parents came along as drives and observers/caterers/loan officers/drivers. There were two Vaughn Brothers Extreme 24s and an Extreme 29. The Extreme 29 was powered by one of Jerry Irvine's G280-10s. Holy Cow.... do those buggers move. I thought G125s were hot. G280s are hotter than 40 yards of hell. They actually scream. Another G280 was used in a LOC Little Nuke. I'd like to plug LOC. The Lil Nuke is an outstanding rocket. Easy to build, streamer recovered and it flies like a home-sick angel. - R J Talley 2003 |
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Jerry, those motors were out-freaken-standing. You now have a wannabe repeat customer. Everyone out there who saw them loved them. Kudos sir! - R J Talley 2003 |
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My experiences:
H240 Fast load in a 29/240 case - Fast and very predictable. No visible effects. H69 Whitestar in a 29/180 case - Average, but overrated. Nozzles must be reused for three flights and there was noticable performance decrease on successive flights. I could not get a good vertical flight in my PML Io. In both cases the delay elements are just supposed to be friction fit. My success rate with this method was 33%. After I started using O rings in the well before inserting the delay, my success rate went to 100%. - Kevin 2003 |
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A G3 migh be the optimal sustain motor with a rocket with a total weght of about 5 Oz., but you would probably want some sort of guidance anyway. Something like a G8 with a 15 second burn time might be useful and practical. - Alan Jones 2003 |
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Recertify the USR K125-FS just to scare the general public! - Jerry 2003 |
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You called these K200's, they tested as a K85 with a 17 second burn. I used a couple, cool motors. - Tom Binford 2003 |
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Sure I do! I flew a USR F100 a couple of months ago. Outrageous motor! I have a couple of G120's in my storage too. Don't know if I have the guts to fly them though! :-) - Bruce Kirchner 2003 |
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...the range of motor types was nice and the firestarters were awesome. - Ray Dunakin 2003 |
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I have to confess though, if Jerry ever got his SU motors into mass production and distribution, at his current prices he'd kick their butts hands down. I have also seen and used a total of 10 of his AP motors and not one CATOed though I think the delay went long on two of them. Most recently, I launched (witnessed actually) two of his G280 motors both of which were loaded into Lil Nukes and both of which screamed off the launch pad louder, meaner and faster than anything I'd seen launched in two decades of rocketry. I would and will, fly his motors again. So far my experience has been pretty good. Daniel Franklin has used his motors and again, IIRC, he has had a CATO or two but he wants to buy and fly more of them and he trusts them enough to use in his Cineroc models. R. J. Talley, Teacher/James Madison Fellow 2003 |
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