building a new flame sucker

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arnoldb:
Looking good Jack :thumbup: - keep them coming!

:beer:, Arnold
PS - Happy New Year!

madjackghengis:
Thanks for the vote of confidence, Arnold, and a happy new year to all modelers :beer: may there be plenty of interesting projects to be done.
I didn't get as much done as I wanted yesterday, helped a friend get further on his 51 Harley project bike, and split some wood for him with my log splitter. Apparently I didn't get enough of the green stuff in the crank pin holes and on the pin, as it didn't lock up tight like it should, so I ended up with the crank in strange shapes when I cut out the piece of mainshaft between the crank cheeks. I filed them down flat, to a good finish, got out my locktite 680, super stud and bearing mount for obstinate studs and bearings, just barely got the crank cheeks properly aligned and in place before it started to set, but did get the crank straight, and then left it sit a while before carefully threading the crank supports on each mainshaft, and with a piece of flat steel stock between the cheeks, clamped to the bench, tapped the main bearings onto their tight fitting drill rod shafts, and getting them close enough to bolt the crank standards back on the cylinder, and then get the bearings fully in their bores, and the crank properly centered between the standards, while adjusting the bearings on their shafts till there was no pressure either way, and the crank spins freely. With the rod set up with the threaded end, I was able to use the gudeon screw in the piston, to screw the rod up into the big end with the ball bearing, and then align the wrist or gudeon pin parallel to the main shaft, and tighten the lock nut on the rod end.

This is assembled with the piston at about top dead center

Here's the rod close to bottom center, moving very smooth and no tight spots

and here's the rod at about half stroke, all the way through with smooth action, no discernable tight spots, and very good vacuum when held against my palm, and the crank flipped, it wants to be running very badly, and is in a bit of a hurry, I think. I just found a piece of spring steel from among a box of ex printer parts, which I think will work well as a valve, at least for now, and I found a gear I can use on one end of the crank, so maybe I can mount this cylinder assembly and work on a cam, operating lever, and valving, not to mention a worth while and interesting flywheel. Just placing it with the head on the counter, and flipping the crank pulls the piston back down to top dead center with a substantial pop and strong sense of vacuum. I'm hoping to have more to show in the next post. :beer: mad jack

NickG:
All sounds promising madjack, I like the design. :bow:

Nick

madjackghengis:
Hi all, I got a bit more done yesterday, took my dogs for a walk, tried to catch a picture of Gandalf, on his back with all four paws waving in the air, but the camera didn't take the picture until two seconds later and he was standing already. Buddy is over by the shop, ready to get to work sleeping.

Gandalf's the big red dog, Buddy's over by the shop door, getting ready for his afternoon nap

removed the mount plate to put in mount holes, now that I know how it fits the cylinder

centering the mount in the mill vise

center drilled, drilled and now tapping the mount plate

first side done, ready to flip

flipped over, centered, center drilled, drilled and tapped for #8-32

thinning a piece of stainless scrap for a flywheel, setting up for a hub

Almost done, just need to recess it for looks

cutting the recess to give the flywheel character

setting up to drill and tap the hub for a set screw

I found a Briggs & Stratton cam, tested it found it workable, and I'm cutting a hub to use it for a flywheel

with the hub formed, center drilled, drilled and reamed for the main shaft, facing off the tool marks on the cam gear

Holding the hub in the three jaw, facing off the second side

with the second side faced, finishing off the removal of the teeth, I think I will drill some holes in this to give it some character and maybe make it a bit lighter. Next comes the cam and valve gear, so I can set up the mount with no interferance with them. It's getting closer to putting fire in it. That's about it for this morning. mad jack

Bernd:
Lookin' real good so far MadJack.

I like your shop, nice and big. :thumbup:

I see you have no snow. Why's that? :scratch:

Bernd

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