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Kevin,
I had a prop overspeed at takeoff on my O-320 in March 2006. A "freeze" plug had come loose from the crankshaft and I lost oil pressure to the prop. I have heard of this happening in many other 320 & 360's. The overspeed was not comfortable at about 3,500 RPM's with the prop tips supersonic. I just throttled back, turned around and landed. Now after a 2 compression tests a borescope and 2 oil analysis's, I am convinced that no major damage was done.
If my prop had gone to feather, there is no doubt, I would have crashed.
Lorn
From: Kevin Kossi <kevin@airforcemechanical.com>
Does anyone have any experience with the use of pressure reservoirs to place a Prop. in full feathering mode when you have an engine failure or loss of oil pressure?
I am thinking about purchasing a Hartzell for my Legacy but that model is not offered with counter weights or a full feathering option.
I heard that one can install a pressure tank to store oil pressure, kind of like a well tank. The tanks has a bladder or piston and spring to store the energy that you can use to feather the prop when all else fails by opening a valve.
Thanks
Kevin Kossi
New York
Legacy 70%
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Lorn H. 'Feathers' Olsen, MAA, DynaComm, Corp.
248-345-0500, mailto:lorn@dynacomm.ws
LNC2, O-320-D1F, 1,200 hrs, N31161, Y47, SE Michigan
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