Friday 30 September 2016

Estes Maxi Alpha, 1978



Although the Estes Maxi Alpha first appeared in Estes' 1977 catalogue, we only discovered it a year later. Having originally found out about the existence of Estes in 1976, we had nonetheless been unable to obtain the 1977 catalogue in Switzerland. This made the contents of the 1978 Estes catalogue even more unpredictable and exciting to us, once our mail ordered copies finally arrived.

Next to the Der Big Red Max Deluxe Model Rocketry Outfit with its gloriously unique Big Foot launch pad, it was also the spectacular upscale appearance of the Maxi Alpha on page 46 of the catalogue that captivated me deeply. So I ordered the kit for the then pricey sum of $ 9.50 and built (deficiently) and flew it that summer. The recovery of the rocket by means of a 60 cm parachute always looked spectacular.

The above photo, taken in front of my childhood home in Nürensdorf, Switzerland, seems to be the only record of my Maxi Alpha during its existence.

Wednesday 28 September 2016

Rocket Fleet, 1986





Part of my active fleet, photographed on the occasion of our morning to afternoon launch at Allmend Frauenfeld, Switzerland, on Saturday, April 26, 1986. It was a beautiful, clear day with only low wind and a temperature of 20 degrees Celsius. Incidentally, this was also the day the Chernobyl nuclear disaster took place.

Lower photo shows, from left: the black Vehicle 31 (featuring self adhesive Mylar foil on payload section), the white and black Vehicle 39 A Enigma, (flown for the first time during this launch), and the black Vehicle 28 A (with white fin and nose cone), a rocket built specifically to fly with Flight Systems E and F black powder motors. The flights of Vehicle 28 A revealed stability deficiencies which subsequently led to a redesign.

Next are the two prototypes of Vehicle 30; #8230 B is on top and #8230 A at bottom. I was about to lose the latter that day. Then the silver/black/red Vehicle 44 Rhea, a payload carrier built from CMR components. To the right of Vehicle 44 are my Estes Bandit (repaired from its previous motor failure) and my trusty Centuri Starfire. Then, the newly completed silver/white/black Vehicle 48 A Heracles (bottom) and the red/white Vehicle 36 B sport model, built from Centuri parts (top).

This is followed by the silver/white/black Vehicle 22 B payload model with its high aspect-ratio fins, my Centuri Excalibur 2, and my Estes Titan II ICBM. The line-up is completed by Vehicle 33, a delta-wing boost glider loosely inspired by Estes' legendary Astron Skydart. Vehicle 33 was scratch-built in 1981, using Flight Systems and Estes components.

In addition to all of these rockets, the top photo also shows one of my Estes Astron Alphas (far right), frequently used to open a launch and determine the wind conditions.

Photography by Martin Kyburz.

[Entry amended October 17, 2016.]

Friday 9 September 2016

Swiss Model Rocket Competition, 1980



Following my participation in the 6th Swiss Modellraketen-Flugtag model rocket competition in 1978, I had originally intended to partake again in September of 1979. I built a rocket designed for the altitude event, called Vehicle 2. Although I really liked that rocket, I ultimately didn't enter it, for reasons that are no longer clear to me now. The second time I thus participated in the Modellraketen-Flugtag was on the occasion of the competition's 8th edition, in September of 1980.

As usual, the competition was organized by the Technorama science museum in Winterthur, Switzerland, and held at Allmend Frauenfeld military training grounds. After having built rockets for the altitude category in 1978 and 1979, I now tried my hand at the considerably less striking egg-lofting competition. In the course of the summer of 1980, I thus built Vehicle 21 (shown above) from various CMR parts, including CMR's ENC 77 egg capsule, something of a secret weapon at the time.

All rockets of the egg-loft competition had to complete two flights using Estes C6-5 motors, both flights having to carry the same egg as high as possible and subsequently land it intact. Most rockets entered were finished rather crudely and utilized off-the-shelf Estes or Centuri parts, including heavy plastic parachutes. Astonishingly, I therefore was the only contestant with a rocket built from what for Switzerland, at that time, amounted to highly advanced competition components.

Nonetheless, this young teenager was surprised (and considerably proud, of course) when my first flight turned out to be the highest of the field. Unfortunately, the Mylar parachute was damaged upon ejection, and the rocket returned to the ground with considerable speed and only minimal braking. As it impacted, competitors and spectators alike all laughed, and I could hear how they universally predicted a smashed egg. But CMR's fantastic egg capsule had worked, and I was able to present a pristine egg to the judges and thus qualify for the second flight. It goes without saying that I suddenly received incredulous and grumpy looks from my fellow competitors.

The impact forces had been absorbed by the blown plastic of the egg capsule, however, and it had cracked along almost half of its length. Next to repairing the parachute, I thus had to perform an emergency fix with electrical tape, which made the rocket heavier and compromised its aerodynamics. Accordingly, my second flight came in some 22 meters lower than the first, which cost me what would likely have been a first place overall. Then again, I still came in second, which was fantastic at any rate, especially given the circumstances.

My participation in this contest also resulted in the very first time I ever read my name in a magazine, when the March 1981 issue of the Model Rocketeer printed a brief report titled "Eight Swiss Nationals".

As was the case when I first participated in 1978, there were again people who blatantly disregarded the contest rules; in this case the rule that the person entering the rocket also had to be the one who actually built it. There was at least one entrant I personally knew who had zero model rocket experience and yet entered a rocket built by a third party with considerable expertise. When the person in question won the altitude competition in this manner, I felt truly disappointed. I didn't bother to report it this time around, but I decided to refrain from ever participating again. I would be perfectly happy just flying rockets with my friends.

Wednesday 7 September 2016

Vehicle 31




Vehicle 31, at the time one of my most advanced model rockets, seen on my metal theodolite launcher. I built Vehicle 31 in 1982, using CMR components; it measured 770 mm in length and 29.5 mm in diameter and was specifically designed for Flight Systems Inc. E and F black powder motors. It further featured a payload section with a length of 230 mm, plywood fins, and a Mylar parachute.

The photo was taken at Allmend Frauenfeld, Switzerland, on April 26, 1986. Vehicle 31 was flown extensively that day on various FSI motors. It was a very graceful and stable design, and it survived the launch in very good condition, if my contemporary notes are to believed.

Photography by Martin Kyburz.

Tuesday 6 September 2016

1970s Model Rocketry, Part 4



Launching a scratch-built, still somewhat crude boost glider from my Centuri Power Tower launch pad in northeast Switzerland, in July of 1978. Once again, the 38 years that have elapsed in the meantime have unfortunately caused me to forget the name and specifics of this design, other than the fact that the propulsion section was designed for 18 mm motors.

I am also no longer certain whether this boost glider managed to fly successfully, although I built a vaguely similar (but improved) model two years later, in order to enter it for the 8th Swiss Modellraketen-Flugtag model rocket competition. That later design performed quite satisfactorily.

Photography by Hans Hofer.

Monday 5 September 2016

Vehicle 75



Maiden flight of Vehicle 75, powered by an Aerotech E15-7W 24 mm composite motor, northeast Switzerland, July 30, 1999. The rocket was launched from an Aerotech Mantis launch pad and carried a custom 9 volt piezo sonic locator with a diameter of 31.5 mm. It was a delightfully flawless and high flight.

Vehicle 75 is purely a sport model; it measures 670 mm in length and 42 mm in diameter, weighing 124 grams. The airframe was constructed with Estes components, and it utilizes plywood through-the-wall fins. Vehicle 75 is designed to fly with D to F motors and is recovered with a nylon parachute.

Bottom photo shows Vehicle 75 in Zurich, Switzerland, in May of 2016.

Sunday 4 September 2016

High Power Research Magazine, Fall 1984



Front cover, sample page, and back cover of High Power Research Magazine, issue of fall 1984. High Power Research Magazine was printed in black and white (save for the coloured paper used for the cover pages), and it had a distinct underground fanzine feel. It was based in Cuba/OH, edited by Mike Nelson, and featured a number of individuals who were or became key figures of modern high power rocketry.

I received this particular issue as a gift from Vulcan Systems Inc., a composite motor manufacturer with whom I was corresponding at the time. For us living in Switzerland, any such publications were treasure throves of previously unknown and highly inspiring information on advanced rocketry.

This 24-page issue of High Power Research Magazine contained high power rocketry news, numerous intriguing ads by emerging rocketry companies, kit and motor reviews, coverage of a launch at Lucerne Dry Lake, further launch reports, reader's letters, and - of course - a detailed feature on Vulcan Systems Inc.

Of note, among many other things in the magazine, is a photo of a younger Gary Rosenfield of Aerotech, during the Lucerne Dry Lake launch (centre image, photo top left).

High Power Research Magazine covers and pages © by High Power Research Magazine, Cuba/OH, 1984.

Thursday 1 September 2016

Eagle Aerospace Systems Inc. Catalogue, Mid 1980s



Sample pages from an eight-page high performance rocketry brochure by Eagle Aerospace Systems Inc., published in the mid 1980s. Sharing the provenance, down to the zip code, with the previously featured Astro Dynamics Corporation, Eagle Aerospace Systems Inc. similarly hailed from Everett/WA and also catered primarily to parties interested in serious, high-powered rocket applications. There were many other obvious parallels between the two companies.

According to this brochure, Eagle Aerospace Systems Inc. offered both rockets and propulsion, and it was particularly the description of their motors that set the company apart from most others of the period. The high power Eagle Dual Thrust Motors operated in two phases ("two motors in one"); a boost phase provided maximum acceleration, while a second, longer burning sustainer phase was designed to provide the rocket with a steady momentum. The propulsion means mentioned in the brochure range from 24 mm G40 motors to "professional Aquila System motors for use by science and industry".

Eagle Aerospace Systems Inc. also offered three series of rockets with payload compartments: Series I consisted of rockets using 24 to 29 mm motors. Series II was designed for "advanced sounding rocket activities". The Aquila System consisted of a complete sounding rocket system "specifically made or scientific and industrial applications".

The Eagle 150 and Eagle 175 rockets were powered by G motors and recovered by streamer. Eagle 200, Eagle 250, and Eagle 300 were intended for the aforementioned Dual Thrust motors and recovered via parachute.

Eagle Aerospace Systems Inc. also provided parts and supplies, such as glass/epoxy sheet stock, epoxy adhesives, a digital electronic timer, body tubes, nose cones, and other components.

Eagle Aerospace Systems Inc. brochure pages © by Eagle Aerospace Systems Inc., Everett/WA.