Raisbeck Engineering last week said it received a full FAA supplemental type certificate (STC) for its ZR LITE Performance Improvement System on the Learjet Model 31 series airplanes. The drag-reduction system essentially employs contoured flaps to improve the type's aerodynamics, allowing block fuel savings of from 7% to 12%, higher cruising altitudes and increased Mach cruise speeds. Main elements of the Raisbeck ZR LITE include new wing trailing edge flaps segments and additional flap chord. The company says its new modification is similar to its ZR LITE performance package for the Lear 35/36 series, which has been in service since October 2004.
This is a companion discussion topic for the original entry at https://www.avweb.com/news/raisbeck-secures-faa-stc-for-learjet-31-mods