by Noisydad » 06 Nov 2013, 10:11 am
Bit hard to tell how much time I put in because I had to make the wooden patterns and the extra long 7/8th x 14 thread tap. Then I did a 4 test casts to find out where shrinkage occurred so as to work out where to put the pouring sprue and feed risers in the sand mould to stop it. I did parts for another and expect that will take about 2/3rds as much time and 3rd one would take less than half the time and so on as better ways of setting up and machining are thought of. Have had experience in prototype development before though that that was with cattle handling gear, front end loaders, loader implements etc.
There's still a few of Wile. E Coyote's ideas that I haven't tried yet.