Cracked engine mounting
03-28-2014, 08:17 AM
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Cracked engine mounting
I have a OS95AX with a front mounting point cracked. Is there a way to fix that? or will this need a new case?
Last edited by yak86; 03-28-2014 at 08:21 AM.
03-28-2014, 09:35 AM
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No need to replace the case if it is just the mounting hole that is cracked.
Get a piece of 3.16th ali bar about 1/4 inch wide and drill two holes in it the same distance apart as the engine mount holes.
Now use bolts that are 3/16th longer if required and fit the engine with the bar above so as to clamp the mount to the bearer.
Get a piece of 3.16th ali bar about 1/4 inch wide and drill two holes in it the same distance apart as the engine mount holes.
Now use bolts that are 3/16th longer if required and fit the engine with the bar above so as to clamp the mount to the bearer.
Anyway it's a good idea, and will work. Some trainer type airplanes use that method of mounting engines. The strip of bar stock will spread the load over the remaining area of the engine mounting lip.
03-28-2014, 08:38 PM
#7
A new case for a .95AX is a 109 bucks so a little effort at alternative repairs may be called for. Another method I have used in past successfully if you do not want to be limited to pinch type engine mounts is to fabricate two light gage steel sheets in the shape of the mounting lug, Measure and pre drill the two holes then bond the steel sheets one on top and one on the bottom of the mount lug with JB Weld
After cure clean the holes with a drill of the pressed out JB. This works well depending upon how much of a lug is missing around the bolt hole.
John
After cure clean the holes with a drill of the pressed out JB. This works well depending upon how much of a lug is missing around the bolt hole.
John
03-29-2014, 07:29 AM
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I know some guys that would try CA.... serious.... stop laughing, use Duncker's idea. There are some MK brand and other's that use the clamp method for the whole engine.
03-29-2014, 06:03 PM
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Not for a mounting lug, but I bought a second-hand ST 2300 that had the carb CA'd in - the guy must have lost the drawbar and nut. Couldn't get it out for months of use. Eventually the fuel ate the CA away and it came loose.
Wow,
Jim
Wow,
Jim
