--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2


> The slot is perfectly straight. No taper at all. If you stand a new or near
> new apex seal on end in the slot, the exposed end should not move more than
> (about) 3/16" total. New slot and new seal gives nearly no movement. The 3/16"
> would be end of life span.
>
> For aircraft use, new or nearly new is the way to go.
>
> You can take engines apart that have been running fine, and the apex seals
> are just about to fall out of the slots they are so short. The slots can wear
> into obvious "V" shapes, and the engine is still running fine. My wife's RX-3
> did that. I was just sitting at a stop sign one day and whack!! A seal came out
> of what was left of a big "V" slot and the rotor crushed it against the
> housing. There was no chrome left on the rotor housings. Big grooves in the
> irons.
> The only piece I could use was the crank.
> The whole thing was scrap.
>
> The rotors are made of cast steel. You can weld on them. I have TIGed holes
> shut and built up gouges and smoothed them off. Again not for aircraft but for
> a dune buggy or any non critical application, I see no reason for scrapping a
> piece I can fix quickly.
>
> I grew up during W.W.II and you were literally not allowed to throw anything
> away. So I don't (until recently).
>
> Lynn E. Hanover
>
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