Noun
ppts pl (plural only)
Abbreviation of percentage points.
Advantages and disadvantages PPTs are very robust due to their inherently simple design (relative to other electric spacecraft propulsion techniques), and draw very little electrical power relative to other comparable thrusters. Source: Internet
As an electric propulsion system, PPTs benefit from reduced fuel consumption compared to traditional chemical rockets, reducing launch mass and therefore launch costs, as well as high specific impulse improving performance. Source: Internet
Due to this lower thermal velocity, chemical propulsion units become exponentially less effective at higher vehicle velocities, necessitating the use of electric spacecraft propulsion such as PPTs. Source: Internet
PPTs have much higher exhaust velocities than chemical propulsion engines, but have a much smaller fuel flow rate. Source: Internet