Quote:
Originally Posted by marki
Simon I had to walk away from it for a bit, it was driving me crazy. I have been working on methods to make the crank and think I have just about worked it out  . It will be made from EN16 (chrome moly steel) which is quite hard to machine and I will need a number of fixtures to support it as there will be a lot of pressure on the blank and cutting tool. The engine was designed by Eric Whittle and has 550 parts that need to be made (very small parts) I must be mad  . Here is a vid of the prototype running at 7500 RPM with a 12 inch prop.
http://www.youtube.com/watch?v=B-SNDErd1IM
Mark |
Ah yeah I thought it looked like a Whittle case. Have seen some very fine examples over the years in ME mag, I'm sure yours will be top notch too judging by the photo's.
I am not looking forward to machining a crank, have read so many horror stories.. from memory(dodgy) Steve Huck made about a dozen of them before he got a usable one!
Strangely, some people seem to be able to spit them out without drama
Anyway.. sorry to Neil for going OT
