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Bell Aerosystems began development of a rocket pack which it called the "Bell Rocket Belt" or "man-rocket" for the US Army in the mid 1950s. [1] It was demonstrated in 1961 but 5 gallons of hydrogen peroxide fuel needed for 21 seconds of flight time did not impress the army.
The bell-shaped or contour nozzle is probably the most commonly used shaped rocket engine nozzle. It has a high angle expansion section (20 to 50 degrees) right behind the nozzle throat; this is followed by a gradual reversal of nozzle contour slope so that at the nozzle exit the divergence angle is small, usually less than a 10 degree half angle.
Wendell Moore developed the Bell rocket belt, utilizing peroxide monopropellant rocket engines. While the rocket belt failed to be commercially developed, the rocket technology proved invaluable in future Bell programs. Bell's crowning achievement in the realm of rocketry was the Agena rocket engine. The Agena was a 12,000 lbf bi-propellant ...
Astrogeologist Gene Shoemaker wearing a Bell Rocket Belt while training astronauts In 1960, the Bell Rocketbelt was presented to the public. The jet of gas was provided by a hydrogen peroxide –powered rocket, but the jet could also be powered by a turbojet engine, a ducted fan, or other kinds of rockets powered by solid fuel, liquid fuel or ...
1961 Bell Rocket Belt, personal VTVL rocket belt demonstrated. [3] VTVL rocket concepts were studied by Philip Bono of Douglas Aircraft Co. in the 1960s. [4] Apollo Lunar Module was a 1960s two-stage VTVL vehicle for landing and taking off from the Moon. Australia's Defence Science and Technology Group successfully launched the Hoveroc rocket ...
One lasting impact of the Silverbird project is the "regenerative cooling–regenerative engine" design, in which fuel or oxidizer is run in tubes around the engine bell to cool the bell and pressurize the fluid. The concept had been known for a long time, but Sänger's team made important work towards its practical use.
This section through an ED nozzle clearly shows the pintle. In this example the outer wall appears similar to the internal contour of a bell nozzle. It appears much like a standard bell nozzle, but at the throat is a 'centrebody' or 'pintle' which deflects the flow toward the walls. The exhaust gas flows past this in a more outward direction ...
Comparison between the design of a bell-nozzle rocket (left) and an aerospike rocket (right) Instead of firing the exhaust out of a small hole in the middle of a bell, an aerospike engine avoids this random distribution by firing along the outside edge of a wedge-shaped protrusion, the "spike", which serves the same function as a traditional ...