Kolb-List Digest Archive

Sat 07/12/14


Total Messages Posted: 6



Today's Message Index:
----------------------
 
     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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    Time: 10:32:18 AM PST US
    Subject: Re: Uncaged bearing - the dreaded "tink-tink" sound
    From: "Ducati SS" <hiwingflyer6219@yahoo.com>
    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. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=426531#426531


    Message 2


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    Time: 12:41:12 PM PST US
    Subject: Re: Prop Strike
    From: "Larlaeb" <larlaeb@gmail.com>
    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. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=426533#426533 Attachments: http://forums.matronics.com//files/photo_32_134.jpg http://forums.matronics.com//files/photo_33_647.jpg


    Message 3


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    Time: 02:02:15 PM PST US
    Subject: Ad in Trada A Plane
    From: "alienwes" <elliott.wesley@yahoo.com>
    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 -------- Wesley Elliott Sport Pilot-PPC Read this topic online here: http://forums.matronics.com/viewtopic.php?p=426534#426534


    Message 4


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    Time: 05:04:38 PM PST US
    From: Malcolm Brubaker <brubakermal@yahoo.com>
    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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    Time: 06:43:14 PM PST US
    Subject: Re: Prop Strike
    From: Brad Nation <nationcap@comcast.net>
    Ouch, that hurt! Your lucky to be in one pice. YellowBird 1 Brad Nation N952DK M3Xtra


    Message 6


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    Time: 11:20:55 PM PST US
    Subject: Custom Built Kolb Mark III Trailer. MAKE OFFER
    From: "lownslow" <mnmcouillard@yahoo.com>
    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 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=426561#426561 Attachments: http://forums.matronics.com//files/img_3635_172.jpg http://forums.matronics.com//files/img_3635_839.jpg




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