TheAv8r Posted November 4, 2021 Report Posted November 4, 2021 18 minutes ago, HRM said: I agree and apparently Anthony @carusoam was prescient about the morbidity of it. There is a triangular sticker, not unlike the old 'Mooney Bird Decal' with what looks to be a blue and red rectangular banner most likely with the model designation which was lost in the heat. I'm going with early 1960s Cessna 150 yoke, final answer. 1 Quote
carusoam Posted November 5, 2021 Report Posted November 5, 2021 15 hours ago, HRM said: I am wondering if the disks can be 'reconditioned'. I wondered that at the time these were replaced, which was about 8 years ago. These have had time to expand, if they even do so, since they are no longer under compression. The difference in landing was noticeable with the new ones. So the question is, if you pulled yours off (no small feat!) and then let them relax in a rubber restorative bath, would the process buy more time? Alternatively, jack up the plane to take the weight off, spray the pucks with 'a rubber restorative' and see what happens. When these were on my E they had reached their serviceable limit. Time, temperature, and pressure… Cause rubber to flow…. Very slowly. as it flows… the molecules get extended, then move past one another… You could get it to flow back by heating and squeezing… But, even then… the intermolecular entanglements won’t be the same as before… the entanglements are what causes the rubbery nature… The entanglements are getting lost over time… refreshing them would take melting and remolding…. If that is possible. They may have been reaction molded… mixed as a liquid, put in the mold, before the chemical reaction is completed… aka RIM… reaction injection molding… The proof… take the pressure off, put them in a warm location, wait… if they return completely… they have great memory… if they stay flat… they have lost their memory… There is probably a specific % of memory that is allowed to be lost to be considered AW… that’s what we are checking in a relatively crude/inexpensive way… Certainly, putting it in a bowl of solvent would be interesting… Getting back to the original shape is one thing… But… you want the original polymeric properties they had when new… Swollen donuts could be made to fit the space… Expect that they will feel softer as well… Unfortunately, they would no longer be the same part number with the extra “processing”… It would be a better gamble to go with the new foreign donuts… PP thoughts only, not a polymeric rubber guy… Best regards, -a- Quote
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