Today's Message Index:
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1. 10:32 AM - Re: Uncaged bearing - the dreaded "tink-tink" sound (Ducati SS)
2. 12:41 PM - Re: Prop Strike (Larlaeb)
3. 02:02 PM - Ad in Trada A Plane (alienwes)
4. 05:04 PM - Fw: warp drive prop strike today (Malcolm Brubaker)
5. 06:43 PM - Re: Prop Strike (Brad Nation)
6. 11:20 PM - Custom Built Kolb Mark III Trailer. MAKE OFFER (lownslow)
Message 1
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Subject: | Re: Uncaged bearing - the dreaded "tink-tink" sound |
This type of failure occurs with metal retainers as well and often leads to a top
end melt down. Certainly there are numerous potential causes for most mechanical
failures but I believe one of the leading causes for this type of bearing
failure is rust. I remember one engine in particular ware the retainer was broken,
ground and mutilated almost beyond recognition. Customer brought the sled
in with a melted piston, piston melted because PTO seal was leaking, PTO seal
leaked because crank wobbled, crank wobbled because bearing failed, when I
examined what was left of the bearing I found rust. That engine was by no means
the only one I found corrosion in. 2 strokes are rather difficult to adequately
protect the lower end during storage. First unlike a 4 stroke a 2 stroke
draws raw fuel into the crankcase on shut down when we kill spark but the engine
spins down drawing fuel thru the idle circuit. especially bad if the fuel
contains ethanol. Oil Poured in the spark plug hole will not necessarily find
its way to the crank bearings and almost certainly will not reach the lower
rod bearing. Fogging is an option but I don't like the stress on the engine as
fogging oil forces a stall. Also on a 2 stroke if the piston is any ware near
the top of its stroke at rest there will be a direct route for moist air to
enter the crankcase thru the open intake port. This was a particularly frustrating
aspect of being a snowmobile mechanic as almost no one would bother to properly
store their machines. The failure occurs so long after the machine is put
back in service that it is almost impossible to convince the customer of the
true cause.
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Message 2
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This must be the season for it. One of the exhaust spring hooks broke and the
pieces of it went through my prop the other day. Safety wire on the spring held
so only the pieces of the hook made the hit. A couple of flat places in
the nickle leading edge were the only damage and I was able to re-shape those
pretty well as directed on the Warp Drive website. I am replacing all the hooks
on the front connection. The rear hooks look ok but all the front ones are
corroded pretty badly.I think this is because the exhaust joint faces that direction
and any exhaust leaking around it would hit those and accelerate the
corrosion process. See attached pics of the good and that broken. Anyway it's
something that might be worth checking. I know I'll pay more attention to that
area from now on.
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Message 3
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Subject: | Ad in Trada A Plane |
I saw a kolb Xtra with a 912 in Trade A Plane. It had a 912 Rotax and was N numbered.
The price was $14,500.
It has already sold, but has anyone else seen them sell for this price?
Here is the broker who sold it
http://jacksaircraft.com/aircraft/
N2515F
Does anyone personally know this plane?
Wes
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Wesley Elliott
Sport Pilot-PPC
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Message 4
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Subject: | Fw: warp drive prop strike today |
=0A-=0A=0Athis happened on take off the pliers were sat on top of the jab
2200 mk3 extra,- and found in the grass. the runway is 100 ft wide. -
the other- prop-- is not as bad but both blades are still junk.- he
flew for 20 minutes like this and did not know he had a problem till the p
ost flight inspection .=0A=0A=0A=0A=0A=0ASent from Yahoo Mail on Android
Message 5
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Ouch, that hurt!
Your lucky to be in one pice.
YellowBird 1
Brad Nation
N952DK
M3Xtra
Message 6
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Subject: | Custom Built Kolb Mark III Trailer. MAKE OFFER |
I have a great custom made trailer for a Mark III but other Kolbs would also work.
Nice wind blast shield perfect for protecting the aircraft at more rapid highway
speeds. Single Person On-load and Off-load using installed hand crank winch.
Tailwheel rides the center track shown in the photos and stops in a detent.
Main tires lock in wells held by ramps. Includes 3 new spare tires. Tires
on the trailer are in great shape. Weight in the 500 to 700 # range, very sturdy
and very stable on the road. Length 21', overall length from the tongue to
the rear of the trailer. The length of the deck itself is 18'. 3' width at the
nose. No reasonable offer refused
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