Overall Savings Compared to Steel Duct is Estimated to be About 30%

Grumman XF6F-3 Hellcat, BuNo 02982, first flown 30 July 1942, suffers engine failure of Pratt & Whitney R-2800-10 on test flight out of Bethpage, New York, Grumman test pilot Bob Hall dead-sticks into a farmer's field on Long Island, survives unpowered landing but airframe heavily damaged. - 17th August 1942