pros and cons list for Pro38 and Aerotech engines.

I would not.

I would rather hear it from CAR and have it be on the NAR/TRA certified list by reference and let Gary sit and spin.

far

Pro38 do 62.5g reloads and 64.5g in the classic range giving a slight thrust variation

ProX - Pro

They great!! easy to assemble and use. Adjustabe delay They are AVAILABLE here in the UK. Similar hardware price to Pre-fire AT no fidley washer to acccidently bin when cleaning the case :-( Very little case cleanup (though plenty of pad cleanup after launching SS reloads all day)

I like to see white thunder reloads in the Pro38 and 54 range to

Prox - Con Only one on a really my personal opinion is that the end closure on the pro54 range is well over prices for what is in essence a turned peice of ally

AT - Pro The cases make nice shelf ornament (well mine do now!)

AT - Con No longer any reaching the UK. The assembly method compared to CTI now looks dated and fidely What reloads did make it into the country post fire where hiked up in price. They left it so long with out any motors over here that a good proportion of flyers now have flown nothing but CTI and will continue to do so, it's only those of us who've been flying a while that have any AT hardware.

CTI Motors are here to (i hope) stay in the UK they will have such a market share that i can't believe we will realisticly ever see AT HPR reloads over here again.

There only chance is to try and get some SU or 24/29mm stuff here as there is currently no expectation of these from CTI and they'd better hurry if Congrieve start shipping there USR motors soon then they will have that market share cornered.

I'd like to see AT back if only to get a chance to fly some of my 29mm rockets and give my cases a dusting but i won't hold my breath.

Damian

-- Damian Burrin UKRA 1159 Level 2 RSO EARS 1115

email snipped-for-privacy@ntlworld.com email snipped-for-privacy@ukrocketry.com

THERE ARE NO RULES IN CALVINBALL! -- Calvin

It no longer matters how "it started out". It is in NFPA codes now and is law so every flight at a NAR or a TRA launch with every Dr. Rocket case is an alleged direct violation of state law.

Jerry

"Everything's gotta have rules, rules, rules!"

- Calvin

It only specifically allows AT cases in the certification documents. NOT Dr. Rocket cases.

Thousands of flights have technicallly allegedly violated state laws for years. Who is being booted for that? Gary? Kane? Clark?

Jerry

"I never give them hell. I just tell the truth, and they think it is hell."

- Harry S. Truman

Seems a little weird to make that part of a "safety" code intended to be given force of law by reference... the fire marshal shouldn't need to care if I void the warranty.

If there is a cato, the hazard potential of the incident depends on things like the mechanical nature of the failure and the position of personnel and other facilities... (It's good if the flaming chunks of propellant don't land in the lemonade stand, and fire-code-based "safety rules" should address such issues in a manner independent of which brand of casing it was).

-dave w

In a snap ring style case certain lengths are not needed to make seals. The seal in an AT style case is from the compression of the closures to the liner. In a snap ring motor the seal is made from the compression between the bulkhead/nozzle to the wall of the casing. It is harder to get the exact right length of liner so that the o ring provide seal, yet not be over compressed and not have enough threading in the case. In a snap ring style motor there is a 1/4"ish lip on each end (nozzle/bulkhead) for the liner to slide over. It is also my opinion that snap ring style motors are MUCH EASIER to assemble than a AT motor. I have head that DPS made a threaded closure that provided seal like a snap ring style case would.

Hmmm... yet another former supplier, now lost?

Very interesting. Sounds like the best of both worlds.

-dave w

Only the Brand A cases are used. You still need Cesaroni forward and rear closures. Cesaroni also makes the cases too if you don't already have access to Brand A 75mm and 98mm cases.

Brian Elfert

I'm sure plenty of NAR members have fired Aerotech reloads in Dr. Rocket cases. Dr Rocket cases are licensed from Aerotech and are indentical in every way except color and laser etching.

The Tripoli BOD voted to allow this mixing and matching of hardware and reloads some time ago. I have no idea how this affects NAR.

Brian Elfert

Granted. But the evolution of a law/code/regulation can provide a good insight into the WHY of its' existence. :-)

That it was

Damian, check with Pete, but he gave me the impression that we wouldn't he getting any more 64.5g reloads.

Pro 54

Motor ejection at the K level Infinitely adjustable delays

A Canadian company which stands behind everything they make. I believe that might be a pro.

Read any one of the AT cert documents. They say the AT hardware and "No sustitutions allowed."

Bob

AMW & CT announced that they would use interchangable hardware for some sizes motors.

Wonder how that going. Anthony can you hear me????

Phil

Some of the snap ring casings thicker walls. The thicker wall makes it less likely that the casing will burst if over pressurized. ANother advantage for EX is that the nozzles are usually graphite which, will last much longer than the AT nozzles.

Phil Stein

Phil Stein