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While walking to the shed I noticed a condensation trail, from an aircraft, behaving badly ... it was straight but now is is an S-shape : Then another "straight" contrail turned into an ellipse: Looks like large complex eddies in the atmosphere. BTW. The sky appears graded from L to R ...

Hello all, Just started this project and looking at the speed I work its going to tale some time. I was asked to detail my progress with pictures so here is the start of the job. The castings look like this : The first thing to do is to machine the castings to get the reference surfaces...

Hello all, Just some advice and tips from you before I go ahead and spend my " hard earned". I am starting to build a hit and miss engine from a kit of castings but still need material to complete the job. The issue is in the selection of steel for the crank shaft and conrod. My first...

Hello All, I have been out of circulation for a while but am ready to start an engine building project so I cleaned up the place (after machining a rather large block of " Delrin" (POM) and this is what the place looks like...

Hopefully I'll construct a small engine before my time is out but in the mean time I need to construct a smallish gear box (about 60:1 reduction) for an astronomy project. To this end I need to cut some spur gears with the following numbers of teeth: 149 (3 off), 37, 41 and 36 teeth. The last 3...

Hello All, My name is Jerry and I'm glad to be part of your community. My interests are in astronomy, science and things mechanical. My machining skills are very modest being limited to simple milling and drilling tasks, however I hope this improves as time goes by. One of my life's ambitions...