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  #11  
Old 04-18-2020, 10:06 AM
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Quote:
Originally Posted by Initiator001
I know far more about that whole product line at AeroTech than I care to remember.

...And now, another episode of "Bob's wacky history of model rocketry products".

When the model rocketry line of RMS products was developed at AeroTech in early 1992, the RMS-18 motor casing was just going to have a 'D' performance load for it. This became the D13 load.

(On another tangent, when the RMS-18 load was determined to be a 'D13', Dan Meyer took a picture of the RMS-18 casing and faxed it to then-NAR President Pat Miller with a note that basically said, "Be afraid. Be very afraid.")

So the D13 would be the load for the RMS-18 casing and that was that.

I couldn't leave it alone.

"What's the largest impulse load we can fit in the case," I asked?
Quickly followed up with, "Can we put smaller loads in the case?"

That got some people thinking.

TBC...


Can you do it as itís own thread? It belongs in History...
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  #12  
Old 04-18-2020, 11:49 AM
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Quote:
Originally Posted by BEC
Oh....I have a feeling Iím going to enjoy this story....


Me too; so please tell us, Initiator. Sadly, I didn't know about reloads and didn't discover this cute little motor case until much later, I'd burn a bunch of C's in one now. I burn a lot of D's in the pair that I have. My Interceptor loves 'em (and D21's too).
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  #13  
Old 04-20-2020, 08:41 PM
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...Continued


So, the staff started looking at other motor sizes that could work in the RMS-18 casing.

It was determined that the largest reload that could fit in a RMS-18 casing and still have an useful delay time was an E27 with a -4 second delay. It would be a 'wimpy' E motor, only around 22-23 Newtons total impulse.

A 'C' motor and a 'B' motor looked possible. An 'A' motor would require too small of a nozzle throat for an igniter to fit through.

As more thinking was put into the idea of these smaller reloads an idea suddenly came clear.

We could make B6 and C6 motors and compete with Estes three motor packages.
Suddenly, the idea took off.

Now, the customer would still have to buy the RMS-18 casing for $40 but just the idea of providing these smaller reloads at a comparable price to the same Estes motor was too good an idea to pass up.

Plus, we could give Barry Tunick (Estes GM) another headache.

The plan was to use White Lightning (W) propellant but to get the correct performance for the B6 we had to use Blue Thunder (T).

The C6 motors would be White Lightning along with a longer burn C4 motor. Blue Thunder would be used to create a C12 motor.

Originally, only White Lightning was going to be used for all the reload kits regardless of casing size but as we worked more on the different RMS-18 reloads, other propellants became incorporated in the RMS-24 and RMS-29 casings.

Gary and Scott Pearce spent a lot of time testing and refining the reloads for all the casings.
In order to match the Estes SRP price and make enough profit there would be only one motor nozzle in the reload kit. The consumer would use the one nozzle three times.

On top of this we were trying to get ready for the 1992 Los Angeles RCHTA Show which was only a few months away.

Fortunately, everything came together in time for the Show.
I was really pleased to have so many new SKUs (Stock Keeping Units) to offer the hobby distributors.
Hobby distributors didn't have the time to learn all the details of every product line they sold so usually it was, "I will take one case of each item."

That was an awful lot of reloads.

AeroTech was able to make all the reloads on order and ship them out pretty quick.

Now we waited for the reorders.

TBC...
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  #14  
Old 04-20-2020, 09:12 PM
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Quote:
Originally Posted by Initiator001
Plus, we could give Barry Tunick (Estes GM) another headache.

Oh, yeah!


.
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  #15  
Old 04-20-2020, 10:55 PM
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I think most if not all on this forum would approve wholeheartedly of any outside actions to aggravate/antagonize/irritate/agitate/annoy Tunick.
Would still like to get that E27T 18mm load back.
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Last edited by ghrocketman : 05-20-2020 at 05:18 PM.
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  #16  
Old 04-21-2020, 05:47 AM
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Quote:
Originally Posted by Initiator001
...Continued

Now we waited for the reorders.

TBC...


The problem with that case is it is gateway, after I got it and used it a few times, the proportion of 24/40, then 29/40-120 flights skyrocketed compared to a-b-c flights, so all smaller rockets got left behind for a while.
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  #17  
Old 04-25-2020, 04:00 PM
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I know you don't go over to that other forum, but you may be interested at what just turned up: https://www.rocketryforum.com/threa...ms-kits.159086/
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  #18  
Old 04-25-2020, 04:08 PM
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Jerry Irvine Jerry Irvine is offline
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Why can't I just make a couple thousand 18mm reloads? Can I get a NAR input port?
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  #19  
Old 04-25-2020, 04:20 PM
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Quote:
Originally Posted by BEC
I know you don't go over to that other forum, but you may be interested at what just turned up: https://www.rocketryforum.com/threa...ms-kits.159086/

Defetive product should be returned to the manufacturer for refund of the purchase price.

"Migrate out" Fizzicks is phun. Chemistry sucks.
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  #20  
Old 04-25-2020, 05:17 PM
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One could make A and B loads with the minimal 18mm nozzle with low Kn propellants. I have those. Not clear why you would want to.

Jerry
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