dave
Joined: 22 Sep 2006
Posts: 1382
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 Posted: Thu Jan 11, 2007 3:25 pm Post subject: : Over-torqued GSC Prop - prop failure - deadsticking |
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Noel,
Are you saying the GSC Wood blades have a aluminum collar on the root ?
I posted some pics earlier of a "departed " GSC wood blade here
http://www.cfisher.com/gsc/
I personally had a GSC blade that was over 10 years old last year that had
started to delaminate . I should try to find those pics and post them for
you to see. I was flying with it and had no issues but I called up GSC and
got 3 more just in case.
Now that being said, I will tell you that I think GSC has a die that they
insert the root end into and injects a urethane into it that forms the root
end . Same goes for the urethane leading edge.
Also, I rec'd some info a week ago that a IVO had departed inflight
recently. I will hopefully get some more info on it. But apparently all
that was left of the one blade was the steel torsion bar inside the blade
that flew apart. It was a IVO Ultralight prop and not a Medium IVO.
So I guess it good to know that deadsticking is a Very Good thing to
practice as a blade departure will not only rattle you are it explodes with
what seems like a sonic boom and your windshield blows out , doors blow
open, dash falls onto lap and engine tears apart your cowl and firewall as
the 4130 engine mount self destructs and the engine hangs by the fuel lines
and rad hoses ( except Jabs, lycoming and continentals ) I guess those
water cooled engines do have a benefit that has not been discussed ? 
Here is a dead stick of a Kitfox
http://www.youtube.com/watch?v=bm1iqcn8nFM
No one is immune from a prop failure. NO ONE !!
Also - I recommend that all planes have a safety cable that secures the
engine to the airframe. Mine is 1/8 cable attached to 2 places on engine
as and through firewall and around a few different fuselage tubes. If you
engine departs, well your C- G calculations will be useless and most likely
your elevator as well .
Dave
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