First rocket engine “breadboard” using flight functional relationship. Hot bleed bootstrap principle was demonstrated.

The design requirements were a thrust of 250,000 pounds, a specific impulse (I sp) of 840 seconds, and a reactor power level of 5,000 megawatts. The Phoebus-1 series was intended …

May 17, 2000 · The delivered Specific Impulse (I sp) of the propellant is simply the Total Impulse divided by the propellant weight or mass. Thus, the units for Specific Impulse are pound …

Feb 24, 2014 · Phoebus 1A operated for 10.5 minutes at 1100 MW before unexpected loss of propellant and leading to an engine breakdown. Phoebus 1B ran for 30 minutes in February of …

Of the 51 RTG s and 38 nuclear reactors launched on rockets, there have been 11 malfunctions of the satellites. All of the malfunctions were due to a problem with the vehicle or human error …

May 13, 2021 · Two different rocket engines have different values of specific impulse. The engine with the higher value of specific impulse is more efficient because it produces more thrust for …

While less important than the specific impulse, it is an important measure in launch vehicle design, as a low specific impulse implies that bigger tanks will be required to store the …

Jun 11, 2025 · In this section, we will explore advanced topics related to Specific Impulse, including optimization techniques, comparison of Specific Impulse across different propulsion …

Dec 4, 2025 · WAGGON-UND MASCHINENBAU PHOEBUS B1 Aircraft Manufacturer: WAGGON-UND MASCHINENBAU Model: PHOEBUS B1 Details on the WAGGON-UND …

An equivalent measure, the net impulse per weight unit of propellant expelled, is called specific Impulse, and this is one of the most important figures that describes a rocket's performance.