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The likihood of anybody being arested by a fire official for violation of the MOdel Rocketry NFPA code is zero to none. NObody in its 40 years history has ever been arrested or charged with a violation of the NFPA Model Rocketry fire code. Its highly unlikely that this would ever happen as...

small amounts is deceiving. The amount of Barium NItrate in a typical rocket motor is what? 15-30% by weight? The 2 G green motors have total propellant weights of 59 and 60 g respectively. do the math thats 6-18g of Barium Nitrate per motor. Thats more than enough to KILL or damge...

Gary, thank you for that informative information. You know full well, I don't work and even pretend to work for any of your competitors. I singled you out solely because this was an AT specific manufacturing post, no other reason. I'm glad to hear that you provide your end user adult...

respect and dignity is a two way street Fred: surely you wouldn't want a Vendor to be selling a potentially illegal or unsafe product to our rocketry community would you? I don't think questioning a vendor in a public forum that literally thousands of potential buyers frequent is being...

Use at your own risk and risk to others and the environment: https://www.jtbaker.com/msds/englishhtml/b0432.htm I am of the opinion that responsible motor manufacturers would not offer such engines that don't come with any warning labels as no tests by have been done by the manufacturers to...

Bill: I think OOP motors TT curves should be preserved at least for historical purposes. terry dean

The point I was trying to make was, that by 1969, the Estes Astron igniter had been the standard ignition media for at least 4-5 years; so if a kid was still using jetex fuse or any other fuse at that time, it would be quite unusual. And yes I am of course aware that the original odels...

anybody seen the teaser commercial for Cold Case on CBS I think? for this coming Sunday night? Its about the day man set foot on the moon in 1969 and it shows a group of kids launching a model rocket..... by lighting a fuse. terry dean

A comparison of the original Centuri/Estes "Super" C and this new Quest C reveals the following: Super C Quest C Peak thrust 21-22 16 (both rounded) Avg Thrust 4.76 3.45 Burn time 2.1 2.45...

SpartaChris: those actually are two pretty good reasons to require a L2 for TRA Research. Although a person could if they so desired make EX J motors all day long with only a LEUP and a FAA waiver sans any TRA membership. I don't really have a problem with the TAR requiring a...

I think it borders on the ridiculous to require a person to be a Level 2 to do Research Rocketry. What Does HPR have to do with Research Rocketry ifall you are only making is model rocket size Research/EX motors? If there some special set of skill sets that a person acquires simply bt...

flex wing model rocket gliders date to 1962 here in the US and at least 1966 in the old Soviet Union. they are essentially dead as a doornail. terry dean

do it closer up.. terry dean

https://www.starshipmodeler.com/events/ihobby_2008.htm terry dean

Well I was one of the two people (the other person, Patrick Harvey "Iceage" is deceased) that started the club, but no, I'm not currently a member of any club. NO, but the DEC launch will probably be at the great Sims farm site outside of Etown (an hour from Lousville) and they do...

The Bluesrocks NAR section #657 /TRA Prefecture #130 holds monthly HPR (Up to 6K K ) launches at ADC Park in Harrodsburg Ky which is within 2-4 hrs of of Louisville down I-64. www.bluesrocks.org terry dean

https://rocketdungeon.blogspot.com/2008/01/tube-fin-performance.html I would assume that both the stability and aerodynamics would be completely different for a rocket that utilizes tube fins to completely surround a body tube versus a rocket that uses 3 or 4 spaced tubes as fins.... I can't...

I personally would not "grind" 3F BP, but I would like to point out that for those of us that do make their own BP using the 3 ingredients, we ball mall the stuff all the time, which is similar to grinding I suppose, and it doesn't readily detonate. Consider adding some water if you do...

MIL-HDBK-762(MI) available on line (goggle for it about 32mb?) has some interesting data on ring tail rockets at supersonic speeds which are similar . hth terry dean

the only difference between 4F and 3F is that particle size determines burn rate: larger BP particles burn slower than smaller particles.. does this make any difference in the same amount of confined space.... probably only in the rate at which the bp gas is created but we are talking...