Discussion
Compared with an oleo strut, a solid spring-steel leg has
Answer: C
Correct answer: Lower efficiency and a tendency to bounce
A spring stores energy elastically and gives it back, so very little is removed from the aircraft - efficiency is around 50 per cent against an oleo's 80.
The energy returned is what produces the bounce, the leg pushing the aircraft back into the air after touchdown. The compensations are simplicity, low cost and almost no maintenance, which is why spring legs are common on light aircraft; they are not weightless, and they certainly do store energy, which is precisely the difficulty.
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