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"If you have a four-bladed rotor, first step is to stop it, then group the blades, then retracting the rotor in a special room... Well it's quite complicated, that's right!"To fold a rotor is common practice on helicopters. To do this at a speed of about200 km/h, when the wing generates sufficient lift may be another thing ... andlowering the rotor probably is a mechanical adventure. There were several projects,which circumvented this problem, simply by folding the rotor backwards, withoutretracting. One example was the BAC NGTE, a 1-11 derivative IIRC. But not eventhis principle was tested in reality.
"If you have a four-bladed rotor, first step is to stop it, then group the blades, then retracting the rotor in a special room... Well it's quite complicated, that's right!"
To fold a rotor is common practice on helicopters. To do this at a speed of about
200 km/h, when the wing generates sufficient lift may be another thing ... and
lowering the rotor probably is a mechanical adventure. There were several projects,
which circumvented this problem, simply by folding the rotor backwards, without
retracting. One example was the BAC NGTE, a 1-11 derivative IIRC. But not even
this principle was tested in reality.
