cost of proposed final modifications necessary to make the aircraft mission-ready. Among the NASA aircraft that he flew were the F-111, F-14, F-8 Digital Fly-By-Wire and Supercritical Wing, YF-12A, the oblique wing AD-1, Controlled Deep Stall Sailplane, sub-scale F-15 remotely piloted spin research vehicle and the X-24B lifting body. Among the pressure suits in which he flew are the US MC-4, US A/P22S-6, US S-1000, US 1030/1034, UK pressure jerkin with Taylor helmet, the Russian KK0-15, the US copy of the UK pressure jerkin with P-mask. Enevoldson said that he had never intended to specialize in high altitude testing, but over a long career he has probably accumulated more diverse experience there than anyone. He has flown above 50,000 feet in 14 different types of jet aircraft, one turboprop (record altitude), one reciprocating engine (5000 feet above record altitude), one sailplane (record altitude), and one rocket aircraft (glide flights). He also held several time-to-climb records in the F104 (3, 6, 9, 12, 15, 20, 25 km — which have since been broken). He may also hold the record for longest time between record flights — 48 years. Perlan Project While working in Germany with the DLR he developed the meteorological basis for the Perlan Project. The theory, briefly, posits that the coincidence of the stratospheric polar night jet and the polar jet stream, when occurring over a mountain barrier, creates the necessary conditions for the amplification of standing mountain waves through the tropopause, in accordance with the Eliassen-Palm theorem. Enevoldson initiated a search for funding for the project. When balloonist and adventurer Steve Fossett heard about it from his friend Barron Hilton, Fossett enthusiastically joined the project as its sponsor. Using NASA and USAF full pressure suits Fossett and Enevoldson set the world sailplane absolute altitude record of , flying from El Calafate in the south of Argentine Patagonia, above the Andes mountains in the wind field of the stratospheric polar night jet. Enevoldson was chosen to be the pilot for the Perlan II follow-up project aircraft. References Ryan, Bertha M. (2010) "Soaring Beyond the Clouds: Einar Enevoldson Reaches for 100,000 Feet" Soaring Society of America , 9780615402253 1932 births 2021 deaths People from Seattle United States Air Force officers American test pilots Recipients of the Distinguished Flying Cross (United States) Flight altitude record holders Glider flight record holders American glider pilots American aviation record holders