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Shuttle Model Details

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Flight Plan

FAI Model Details

Flight Computer information and ET Electronics
SRB Attachment & Timer
Thumbnails above show drawings on this page. Scroll down page to see them.

The Information on this page is about the 1/72 Shuttle Boilerplate which first flew in October 1998, comprising a new ET/SRB set started in August, and using a modified orbiter which first flew in 1984. The drawings on this page show the flight plan and most details of how the model works.

Note that more Details are to be found in the Information and Pictures sections.

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SRB Sep sequence on 3rd flight of Oct 24, 1998 (1998 boilerplate model flight #7). Video shot by Greg Warren, conversion to Mpeg by Doug Pratt. Animated GIF shown here does not reflect quality of the video or Mpeg, much was lost in converting the screenshot frames. Click here to go to a movies page to download

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The Flight Computer is designed, built, and programmed by Jay Marsh. It is a modified version of the Flight Computer used by Jay and Tom Campbell for their FAI Scale 1/66 Saturn-IB models at the 1998 World Championships in Romania. The heart of it is the use of two "Basic Stamp" Microcontrollers produced by Parallax, Inc. which share programming duties. The Programming has two phases, prelaunch mode where it checks for errors and beeps out a code to indicate status, and flight mode once liftoff is detected by the liftoff switch and comfirmed by the thrust switch being pressed for 1 full second. When burnout is detected by the thrust switch (engine slides back from spring pressure), the F.C. controls the servo in the intertank to sep the SRB's. The F.C. then waits for the Orbiter to be sepped by R/C, 1 second after Orbiter sep the F.C. fires the primary ejection charge. If the primary fails the back-up charge is also fired.

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Note that more details are to be found in the Information and Pictures sections.

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