compound marine engine

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vtsteam:
A lot of firsts for you here, Tom., must be really exciting to be doing this project. Especially together with your son! :thumbup:

doubleboost:
That well be a very nice engine
I would keep away from casting brass it can be nasty stuff (zink fumes) :jaw:
Bronze is a much better metal to melt
John

tom osselton:
I haven’t posted in a bit I've been getting my bike ready for sale.

Yes it is always nice to have my son helping mind you we have always had a good relationship more like friends.
Well I have been drilling and tapping holes (24 more to tap on the steam chests) using the drill press to keep the tap square. I have gone around looking for ¼” studs for the steam chests but they either had to be ordered in or came in batches of 100 for $178.00 so I made my own on the lathe using fine/coarse dies which did not take that long.

I have also made a fan shroud for my mill after having 2 motors go the way of the Dodo :Doh: pushing air into the cover. They both melted the rear brush into the cap making removal impossible unless you shear the tangs off as seen in the pic so I cut out two round shims for this motor to fit between the two that should solve this problem.

Adrian came over Sunday and we gave brass a try turned out to be a bit of a shite show but still was a test to see if my furnace would melt it I was wondering if my blower would push enough air.
I’m using sandbox sand so it isn’t the best we had trouble with the mold coming out clean as the patterns were made in haste I think that the sand was actually adhering to the paint but we used them anyways. We melted scrap plumbing and soon had a a6 crucible filled (sorry no pic’s) and went to skim it, well my skimmer was to big for the crucible lesson learned plan ahead but it poured nice although I will have to make a pouring tong instead of using the lifting tongs. All in all it went not that bad I just would have liked the molds to be better. (we only used ½ of the flask so no riser’s were used) :beer:

tom osselton:
I've got a bit further the drilling and tapping is finally done!

I was a little worried about getting the chests square so I tapped them on the mill by hand. I was thinking the other day about a ring that would fit on the drill chuck using the three adjustment spots to turn the chuck something like this:

It worked quite nice! :D
Thats as far as I have got this week I'm going to have to get some good casts done soon here is something I am experimenting with http://madmodder.net/index.php/topic,9962.0.html

I can machine the lower caps and do some more work on the pillars so I'm not stumped yet.
I haven't ordered the rings yet as I am going on holidays soon it wouldn't work out with the mail.

vtsteam:
Hmmm maybe I won't switch the drill press over to a keyless chuck, like I did the mill after all..... :thumbup:

The engine is looking really good, Tom.

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