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Old 12-19-2013, 12:40 PM
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GregGleason GregGleason is offline
U.S. Manned Space Program Buff
 
Join Date: Mar 2009
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The first pic is a drawing showing a cutaway view of the SRB.

The second pic is a cross-section of the propellant grain. The star pattern (called finocyl) increases the burn area surface from the standard hole in the center.

The last pic is the SRB thrust curves for STS-107 (last flight of shuttle Columbia). You can see the obvious drop off of thrust during Max-Q.

Greg
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