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Old 02-26-2011, 09:05 PM
Initiator001 Initiator001 is offline
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Default Estes Pro Series History

There have been serveral threads lately which have mentioned the Estes Pro Series kits from the 1990s.

I thought it would be of interest to those who read this forum to provide some history about these rocket kits.

Please note that this is just 'MY' take on the history of these products. I apologise in advance for any errors, mistakes, omissions. Current/former Estes employees are welcome to post any information they have on this subject.

The Damon Company had purchased Estes Industries in 1969 and Centuri Engineering in 1970. This was at the height of the 'Space Race' with the Apollo moon landings. As public interest in the American space program declined, so did interest in model rocketry.

Centuri had a large model rocket division known as Enerjet. Enerjet motors used composite propellant to send hobby rockets higher then most rocketeers had ever seen. The Enerjet motors were expensive for their time, labor intensive to make and with the decline of the hobby, sales dropped.

The Enejet line was gone by 1976 with the remaining parts and components shipped to the Estes plant in Penrose, Colorado. There, Mike Dorffler and Ed Brown experimented with making composite motors using the leftover Enerjet materials but no production motors resulted from their efforts.

Estes was manufaturing large model rocket kits under the Maxi-Brute label but the last of those (Saturn V) was discontinued in 1986.

That appeared to be the end of Estes and their production of large model rocket kits but they were about to get a wake-up call...

(To be continued)
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Old 02-26-2011, 09:29 PM
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In 1988, a new model rocket company named Enertek (TEK not JET) was announced at the 1988 HIAA Show. Enertek displayed a line of larger model rocket kits using E through G motors. Enertek was run by several well known rocketry people including Lee Piester (Founder of Centuri Engineering).

The response of the hobby distributors was overwhelming. Enertek would garner about $5M in orders from distributors at this show. The Estes folks were a bit shocked and called a meeting of the dormant Model Rocket Manufacturers Association. In this meeting, the Estes staff tried to get support from the other model rocket manufactures to have Enertek products banned. Their efforts failed.

As it was, Enertek failed for other reasons but Estes took away the knowledge that there was a market for larger model rockets.

The rights to the Enertek product line was purchsed and incorporated in AeroTech. AeroTech was able to bring to market larger rockets promised by Enertek and begin shipping product in January 1990.

Possibly in response to the Enertek 'threat' Estes released some larger model rocket kits in 1989 including the Super Big Bertha and S.W.A.T.

The Damon Company decided to sell Estes in 1989 and the company sold for $40M+. A new General Manager named Robert Buroker took over running Estes.

The 1990 Estes catalog announced a new large kit named the Optima and designed by Mike Dorffler. Still, the maximum motor for this kit was the D12.

The 1990s dawned with a revitalized model rocket industry.

(To be continued)
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Old 02-26-2011, 09:43 PM
Initiator001 Initiator001 is offline
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1990 would become an important year in the history of model rocketry.

Estes was under new ownership/management.

MRC had revamped their model rocket product line with Concept II (Developed by Bill Stine).

North Coast Rocketry had their 'catalog' and increasing product line.

AeroTech was shipping kits and motors.

(I'm leaving out the HPR side of things).

It was at this point that I take the credit/blame for Estes' interest in larger rockets and motors.

It's June, 1990 and at my place I am busy constructing two of each of the AeroTech kits to take to NARAM 32 outside of Dallas, Texas. One of each kit for display, another to fly at the manufacturer's demo during the meet.

I'll be attending NARAM so I want some new rockets to fun fly.

I had picked up one of the new Estes Optima kits to build but I decided it just couldn't be stock. I decided it should LOOK like a stock Optima kit but really be something different.

I decided to construct it so it could handle a small 'H' motor, if I wanted to go with that powerful a motor. Otherwise, I would fly it on 29mm 'F' & 'G' motors.

By the time I finished the Optima, the only original kit parts were the nose cone, decals and the forward balsa strakes/fins. All other components had been replace with AeroTech kit parts and the fins cut out of plywood and mounted 'through-the-wall' to the motor mount Fin-Lok rings. I spent quite a bit of time on the finishing as I wanted it to look like a display model.

I packed up my Optima and headed off to NARAM 32 which was the first week in August, 1990.

(To be continued)
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Old 02-26-2011, 09:47 PM
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Dallas, Texas. August, 1990.

Hot, humid (rain!?) and hungry fire ants.

The manufaturer's demo was scheduled for later in the week. It turned out to be an excellent demo as there were many manufacturers demonstrating products (Rocket golf, anyone?)

Mary Roberts was there representing Estes and flying their new kits. Also, the new General Manager of Estes, Bob Buroker, was in attendance.

AeroTech demo flew all their kits as did MRC, North Coast and others.

After AeroTech was done flying, the Mantis pad and Interlock controller remained in the launch area.

As Mary announced each of the new Estes kit and described it's features before launch, I loaded up my Optima on the Mantis pad. It would be powered by a White Lightning F25-6W motor. This was a time when high-power flying had not yet become part of a NARAM and even 'F' and 'G' motors were considered quite impressive.

I had worked it out with the RSO & LSO that after Mary had the Estes Optima launched, I would signal them to launch MY Optima.

As Mary worked through the 'A', 'B' & 'C' motor powered kits, she finally reached the Optima. A countdown was given and the Estes Optima launched...
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Old 02-26-2011, 09:48 PM
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As the D12-3 powered Estes Optima soared into the sky, I signaled the RSO to launch MY Optima.

After a countdown, the F25 in my Optima roared to life and sent the rocket racing into the sky, higher than the one Mary had launched.

Several folks were startled by the noise of the F25. They had been expecting another D12 powered flight.

Both Optimas deployed their parachutes and had normal landings.
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Old 02-26-2011, 09:50 PM
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Later, after the 'dueling' Optima flights, I was told that Buroker had commented to Mary that Estes should have composite rocket motors and kits (Or words to that effect).

From this grew an effort by Estes to create a line of composite motors and kits.

At least, that's MY story.

(To be continued)
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Old 02-26-2011, 09:33 PM
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Bob-

Interest piqued with just your intro post, and I felt I knew a decent amount of this already.

Just one quick question (but not to divert your thread) do you know when the last of the Centuri operations ceased in Phoenix and were transferred to Penrose? I know you have some intimate knowledge of the Centuri history with your past association with Lee Piester and the Enertek effort, so thought you might know when the 'Centuri transfer to Penrose' came to be.

My impression from ordering from both companies in the mid to latter 70s is that it may have occurred in phases, but was not sure when shipments of Centuri orders began to originate out of Penrose.

Feel free to reply in a different thread to keep this thread 'clean' if you like.

Thanks,

Earl
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