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Hello Paul, I have been pondering the torsion bolts for a single rotor. I did buy a set of bolts and the idea was to just cut them down but this will change the tension or springiness of them at 29 ft/lb. They wont have as much spring in them . What have your followers or yourself done or recommend?
Would some combination of Belleville washers bring back a bit of spring ?

My other consideration is balancing of the moving parts. Can anybody tell me how to go about this on a single rotor. Should the rotor weight be included in the balancing and if so can a block of iron the same weight as the rotor just be bolted or strapped onto the shaft lobe for this balancing purpose or could the rotor itself be used. Should the balance of the rotor itself be checked too?

I am back from France but still a couple of hundred miles short of my shed while at work but my engineer tells me the new eshaft is done apart from cutting the keyways in. Should be all done by the time I get back to Shropshire in two weeks

Regards
Mark Dilner

You don't need the spring. Many rotaries were built with solid bolts.

Here is the balance data.

Paul Lamar

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