On 4/23/2012 7:12 AM, Sid Wood wrote: > I used Delrin pads between the engine mount and fire wall. These pads are > one-inch thick to move the engine forward one inch for CG balance. The pads > were cut from a scrap piece using a 2-inch hole saw.
Be aware with doing something like this, that polymers can creep when subjected to a constant strain (exacerbated by heat). Delrin (acetal homopolymer) is particularly creep resistant for a plastic, but it still will. I don't know how long you have been flying with this configuration, but if it hasn't been very long, I would keep a very close eye on the tightness of those bolts. The actual bolt won't loosen, but the thickness of the spacer may decrease over time. Obviously the lower mounts would show signs first. Just another thing to thoroughly check at annual, not that you don't already check the engine mount bolts :-) Not trying to scare anyone, or say it won't work... Just bringing to light a possible issue. I suggest that anyone using a spacer make them from aluminum or other metal. If you don't have access to a machine shop, or can't otherwise make them, I would be happy to cut some on the lathe. Matt -- ---------------------------------------- Matt Elder Orangeburg, SC
