A .4% scale stainless steel model of the current space shuttle orbiter/external tank configuration is shown in proximity to two Liquid Fly Back Boosters (LFBBs). The LFBB concept is being studied as a replacement for the existing space shuttle solid rocket boosters (SRBs). The LFBB is designed to be a completely reusable liquid-fueled booster that will return to the launch site, using an autonomous landing system, after separation from the orbiter and external tank. The current shuttle SRBs have to be recovered from the ocean and then refurbished for later use. The initial proposal for the LFBBs include two options: "dual" boosters - two separate winged boosters; and "catamaran" boosters - a dual fuselage connected by a common wing. This photo shows the "dual" option LFBB. Wind tunnels tests of the LFBB shuttle configuration are underway at NASA Langley.
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