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i have seen a lot of different ideas about propulsion here. it seems like many of them would have great benefits, in different areas. is it possible to combine different engines within a launch vehicle? pulse propulsion to me seems great for short acceleration bursts, while ion drives, if im getting this right, are good for maintaining a long distance speed with low fuel usage.
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To restate this in more basic terms:
Due to material strength limitations, there exists an inverse relationship between Isp and thrust.
Therefore, it makes sense to use a high-thrust, low Isp drive for some phases of a flight, and a low-thrust, high Isp drive for other phases of the flight.
This makes perfect sense, as long as the thrust-to-weight and dead mass issues can be made to behave.
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thanks, thats what i was getting at
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