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Home / Archives / Back to the future: Kosdon TRM motors to make return
Back to the future: Kosdon TRM motors to make return Print E-mail PDF
2009 Archived News by Planet News   
Tuesday, May 26, 2009

WORLD WIDE WEB — In an early morning communication which was reposted to other hobby rocketry mailing lists with permission, Paul Holmes, chairman of the Tripoli Rocketry Association's motor testing committee announced that Tripoli has reinstated Dr. Franklin Kosdon as a Tripoli Certified Motor Manufacturer.

Basing the decision on the recent court decision that removed ammonium perchlorate composite propellant (APCP) from the list of federally restricted low explosives, the announcement stated that manufacturers of APCP rocket fuel no longer need a low explosives manufacturing permit issued by the federal Bureau of Alcohol, Tobacco, Firearms and Explosives.

"Due to the recent court decision being upheld on the status of APCP and manufacturers no longer needing Low Explosives Manufacturing Permit (LEMP) licensing, Mr. Kosdon, again meets the minimum requirements to be considered a manufacturer in the eyes of this office," Holmes stated in the recirculated posting. "To that end, I submitted a motion to the TRA BOD for his reinstatement which passed as of 20 May 2009."

Plans call for Kosdon and Holmes to exchange a list of motors he will be offering for sale in the near future, with the ultimate plan being to re-release his entire motor line from 2001. The list will be compared against his previous certified motor list, and once confirmed, motors from the list will be allowed to be sold and flown by Tripoli members immediately. Within one year, Kosdon must submit the listed motors for recertification testing, comparing the output to the original test data.  Failure to resubmit the motors from the list for testing could result in the decertification of those motors.

"This action is deemed appropriate due to the excellent past history of these motors and periodic monitoring of his research work over the last eight years to insure he has maintained consistent standards," Holmes said in the posting. "In addition, once the agreed list is posted by this office, any past stores of these motors WILL be allowed to be flown." Holmes went on to clarify that no legacy Kosdon motors are to be flown until TMT makes an announcement.

Dr. Kosdon is considered a propulsion pioneer of today's high-power rocket motors.  A Massachusetts Institute of Technology alumni, Dr. Kosdon's work was lauded in the October 25, 1961 issue of MIT's "The Tech" student newspaper, in an article announcing Dr. Kosdon and Harvard student Ronald Winston's winning a $1000 award offered by the MIT Rocket Research Society.  The pair won an award for submitting a research paper they wrote together called "Experimental Development of an Isocyanate Solid Propellant," describing a safe propellant formula for amateur rocket use.

Dr. Kosdon's Tripoli membership was suspended in March of 2002 for several claims, including breaking an agreement not to sell motors at TRA launch sites until he became "legal," the result of the then federal necessity of an LEMP, and various applications of California state law.  This suspension took place after Dr. Kosdon had announced his candidacy for the TRA board but before the election. Dr. Kosdon addressed these claims at length in his response.

With the federal burden of licensing removed, Dr. Kosdon's reinstatement by Tripoli will allow the popular Kosdon motors to once again roar at launch sites across the country. And, while the question of a federal LEMP seems to have been answered, it remains to be seen whether other NFPA requirements will be demanded.


Reader comments:
#1 Re: Article: Back to the future: Kosdon TRM motors to make return
This is just about the greatest news ever! While other motor manufacturers have come a long way and now offer just about any flavor you'e ever want, Kosdon motors are still loud, aggressive, and cool! Can't wait to begin burning the loads again!

-Eric-
ECayemberg on 05-26-2009 02:58 PM
#2 Re: Article: Back to the future: Kosdon TRM motors to make return
I guess its just a matter of time before every APCP wannabe fly-by-night five finger discount manufacturer gets back in the garage/basement/outhouse APCP biz too huh? This is indeed great news!


Instead of "back to the future" this should have been labled "back to the good bad old daze"

how about some 10mm warp-9 A end burner motors?


I guess the TRA forgot about NFPA 1125......

terry dean
shockwaveriderz on 05-26-2009 03:23 PM
#3 Re: Article: Back to the future: Kosdon TRM motors to make return
Get some 54mm M motors going...
New Ocean on 05-26-2009 03:36 PM
#4 Re: Article: Back to the future: Kosdon TRM motors to make return
It was my impression that manufacturers still have to have DOT EX numbers regardless of explosive permit requirements. This is a non-trivial requirement and as such, the "fly-by-night" people will still have to be very serious about their investment into motor making.

-Aaron
heada on 05-26-2009 03:44 PM
#5 Re: Article: Back to the future: Kosdon TRM motors to make return
Aaron,

Frank has the DOT numbers; but you are correct.
ECayemberg on 05-26-2009 03:59 PM
#6 Re: Article: Back to the future: Kosdon TRM motors to make return
Quote:
It was my impression that manufacturers still have to have DOT EX numbers regardless of explosive permit requirements.
That, and any motor employing an included ejection charge still necessitates a LEMP, right?

Doug

.
plano_doug on 05-26-2009 04:26 PM
#7 Re: Article: Back to the future: Kosdon TRM motors to make return
It would be trivial to not include an ejection charge and put that back onto the user. See most AT 54mm motors and above as well as all plugged motors. I do believe that you are correct though. If a black powder ejection charge is included, a LEMP may still be required.

-Aaron
heada on 05-26-2009 04:31 PM
#8 Re: Article: Back to the future: Kosdon TRM motors to make return
Having purchased several Kosdon motors years ago from a few different sources, I can say with certainty that not a single one contained a trace of BP. Delays, rings, etc. yes. The Kosdon by Aerotech J520 Fast that I flew this weekend did contain BP however.

I would agree that it would be nice for the BP to be included; but I would guess that you will not see any BP included with any of the loads, intended to be plugged or used for ejection.

-Eric-
ECayemberg on 05-26-2009 04:45 PM
#9 Re: Article: Back to the future: Kosdon TRM motors to make return
Quote:
It would be trivial to not include an ejection charge and put that back onto the user.
Agreed.

It's ironic that HPR users will have little problem with this since most of them are accustomed to dealing with ejection charge issues anyway, but if this were imposed on LPR users, they would probably be more affected, especially the SU customers who ordinarily never even touch it. I imagine many of the LPR reload users would find adding their own BP a PITA. (And there is an issue of whether user-supplied BP [versus kit supplied BP> is legal to use without a LEUP.)

Anyway, single use motor makers, such as RoadRunner for example, must maintain a LEMP even if the propellant doesn't require it.

Doug

.
plano_doug on 05-26-2009 04:49 PM
#10 Re: Article: Back to the future: Kosdon TRM motors to make return
Whats going happen to Kosdon by Aerotech reloads? Are we just out of luck?
rockets91 on 05-26-2009 05:26 PM
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