free wheel units
KH4/3b1 recently had a hard landing at a station in the N.T,the pilot said that he was in powered flight at approx 80 feet when erpm screamed out the top and seemed to start to settle . The exprienced pilot upon realizing the rrpm needle was decaying , he was settling /overpitching even with full erpm entered auto contacting the ground with a force that collapsed both skids ,luckily not hurt at all .
The engineers where quoted to say ,sounds like the free wheeling unit has let go, and used to happen all the time at vrd .
Can anyone confirm that this has happened to them in the past .