The correct answer is the McDonnell XH-20 “Little Henry”. The diminutive XH-20 “Little Henry” was developed by a team led by Marvin Marks in close co-operation between the Helicopter and Propulsion Division of McDonnell and the AAF/USAF Rotor Wing Branch, Propeller Laboratory and Rotary Wing Unit, Aircraft Projects Section, Wright-Patterson AFB. At the time of its inception, the XH-20 was unique in being powered by two McDonnell-developed 18.42cm ramjet units weighing only 4.5kg each, mounted at the tips of the two-blade rotor and fed from tanks beside the pilot. The fuel, originally propane but later gasoline (motor car petrol), was boosted through a feed line to a delivery valve on the rotor head. From there centrifugal force took over to convey the fuel through the blades to the tip-mounted ramjets.
The correct answer was submitted by jeaton1, intruder38 and gatormark91. The standings: jeaton1 is first with 6 correct, skybolt2003 and intruder38 are tied for second with 4 correct, and wayne baker are third with 3 correct… Question #7 will post shortly and thanks to all who participate!
Brian [C):-)]