Rear shot of Hungerford Rocket from Hemmings Blog. Four of the five nozzles were props- the builder compared them to the dummy stacks on ocean liners- although they had planned to increase the power until the unit could fly over traffic.
From this page (with a couple amazing scanned in photos):
“David Smith of Elmira is making a documentary film about “Elmira’s Hungerford brothers, Daniel and Floyd, pioneer aviators, inventors, and eccentrics of the first order. In 1929 they built a rocket-powered car which they named ‘Shirley Lois, Moon Girl’ after Daniel’s young daughter. For several years, they staged exhibitions with the car at county fairs and air shows in the vain hope of attracting investors. By the 1940’s they had given up on the project. “
From this anecdote site:
“”In 1929, Daniel, Floyd, and William Hungerford stripped a 1921 Chevrolet down to its fram and converted it into a “Hungerford,” the world’s first commercially made rocket car. The Hungerford was actually a hybrid: it kept the original Chevy engine for low-speed travel, but when the car hit 50 mph, the driver flipped a switch and the gasoline-powered, forced-air rocket engine roared to life. The Hungerford looked like a hot dog on wheels, except the rear end tapered to a point and had five rocket nozzles (four of which were fake). Safety wasnot an issue: the Hungerfords gave their cars sophisticated braking systems, and built the bodies out of linoleum and cardboard, so passengers could kick their way out of the wreckage in the event of an accident…The Hungerford Rocket was doomed from the start: it got only two miles per gallon, had a disappointing top speed of 70 mph, and left a 20-foot-long flame as it traveled… The Hungerford brothers went out of business in 1939.”