Chris,
I would think that propellors act similarly to a gyroscope, though with a
wood core, the mass would not be so great. Sudden flicks in direction could
produce a counteracting force, which might stress the hub components. Just
a thought.
A lightning strike to a composite prop seems, to me, to be a
stretch..............
Jim Nichols
Tullahoma, TN USA
----- Original Message -----
From: "Chris Barker" <ftog@xxxxxxxxxxxxxx>
To: "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Thursday, October 04, 2012 11:52 PM
Subject: Re: [OM] IMG: More Airport Activity
> Jim
>
> It is composite, but with a wooden core. The failure occurred near the
> counterweights at the hub, and they haven't found the bolt, I gather. The
> story that someone has concocted (I hear) is that the propellor suffered a
> lightning strike sometime in the past and the failure was a (distant)
> result.
>
> But, perhaps coincidentally, we have stopped flick manoeuvres in
> aerobatics. Another story goes that the manufacturer, Grob, was upset to
> find that we were performing these manoeuvres during aerobatic sequences:
> they cause a fair bit of stress to the airframe and perhaps to the
> propellor.
>
> Aeros will be a little less dynamic from now on . . .
>
> Chris
>
> On 5 Oct 2012, at 05:42, "Jim Nichols" <jhnichols@xxxxxxxxxxxxx> wrote:
>
>> Was that a composite blade that was shed? I read about a similar
>> incident
>> over here, but don't recall the aircraft type.
>
> --
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