The Lego Legacy

Lego is Brian Liggett (our Prefect) and my (Greg Davis) Level 3 project. It started in December of 1996 and has been an ongoing project since then (primarily because shortly after the launch below it had a structural failure in a fin and blew apart). The original Lego flew several times on single K-1100 motors, once with the first pair of K-550 motors air-starting, and once with the K-1100 boosting, 2 K-550's air-starting at 1 second delay and the second set of K-550's air-starting 3 seconds later. That was when the structural fin failure occurred in a fin that had been repaired from a rough 'chute assisted landing. We have just completed the reconstruction of Lego II. The idea, and hence the name Lego, was to build a modular rocket with multiple boosters and the ability to fly it in several different configurations. Here's what we came up with:

Click on the above Photgraph for more shots of Lego and Lego II
or click here for pictures of its construction. 

Construction:
Body - LOC 7.5 in. tubing re-inforced with two layers of 6 oz. fiberglass and three coats of fiberglass resin.
Fins - Custom cut G10 - LOC
Nosecone - Molded Styrene - LOC
Recovery - Alt S-25 Altimeter w/Black Sky Timer Backup
Dual Parachute Recovery

Specifications:

Configuration 1

Calculated Altitude: 6634 feet
Calculated Speed: 723 feet/second

Configuration 2 (shown above)

Calculated Altitude: 4679 feet
Calculated Speed: 544feet/second

Configuration 3

Calculated Altitude: 6845 feet
Calculated Top Speed: 758 feet/second

Configuration 4

Calculated Altitude: 5201 feet
Calculated Top Speed: 596 feet/second

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