What is the approximate upper limit for the exhaust speed for electric propulsio
ID: 159932 • Letter: W
Question
What is the approximate upper limit for the exhaust speed for electric propulsion?
50 km/s
1000 km/s
200 km/s
10 km/s
Why are gases like Argon and Xenon used in electric propulsion? (more than one answer may be correct)
The heavier mass provides more momentum.
They do not tend to react with the thruster walls.
They are inexepensive to purchase.
The elements are easy to create a plasma from.
The heavier mass provides more momentum.
They do not tend to react with the thruster walls.
They are inexepensive to purchase.
The elements are easy to create a plasma from.
Explanation / Answer
The upper limit can be approximately 10 km/sec. If we take values more accurately it is approximately 8.04 km/sec . In electrothermal propulsion. We use an arc that has an energy density of lightining bolt in heat and velocity ranges to 10 kmpersec approximately
2) because argon and xenon are inert gases and denser so they dont react with the thruster walls. They also provide good momentum.
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