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I'm thinking we got the same guy!Was his name Dave? (there cant be many). I speak with him weekly.
And the reply isYou may well be right, I'll ask him. I think his engine was based on Kurt Schreckling design but with mods. I recall Inconel mentioned but can't recall which specific parts. He also had access to big boy machines through his employer at the time, but primarily is a home shop machinist kinda guy.
Then it was another of the members. I do recall the run times for some of the parts were, to me, astonishingly long! 24+hours, for not very big parts. But, they were not very big cutters, and running very fine stepovers too!And the reply is
- engine based on WREN design, not Schreckling, before WREN shut the door on plans & parts & design information
- the turbine vane wheel was solid Inconel, made with series of sinker EDM tools he made (on off hours work machine)
- no Sherline equipment, maybe it was one of the other guys. I think his home CNC is confined to EMCO mill