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Sep 05, 2019, 07:22 AM
Latitudes vs Attitudes
Bob Gaito's Avatar
I love this build..I see that you use loctite for clamping things to be machined-it must take some time for the loctite to set..consider, I use thin CA glue..it sets immediately, loves metal and can be separated in less then an hour in an acetone bath.. just a thought..
Latest blog entry: Mark V Navy Seal SOC
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Sep 05, 2019, 08:08 AM
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tghsmith's Avatar
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loctite set much faster than you think,, the bearing retainer 603 (that will hold the crank together, plus pining) gives you less that a minute and then its a torch to get things apart if they are not correct!!! the reason why the gauges were made and things were done in two sessions.. this vid shows the same crank being made..
STUART MODELS TWIN LAUNCH STEAM ENGINE REBUILD - PART #11 (8 min 23 sec)
Last edited by tghsmith; Sep 05, 2019 at 08:45 AM.
Sep 10, 2019, 06:11 PM
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the crank looks more like a crank, lots of chips on the mill today,, the main bearing blocks and caps were drilled and fitted,, the entire base was milled to fit the crank..
Sep 12, 2019, 10:21 AM
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base frame has been bored and crank fitted.. now to start cleaning up the base castings
Sep 18, 2019, 08:32 PM
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started work on the connecting rods,, fun little turning project,, the stirrup straps and wedges will be interesting to make..
Sep 20, 2019, 07:35 AM
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milled the bearing halves for the strap and to fit the rods,, feeling much better about this method now,,
Oct 05, 2019, 07:15 AM
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milled the straps and made a fixture to bend them over,, annealed the straps before bending, once all finished they will get a heat treatment .. will have to mill and file the slots in rods next, and make the wedges,, the bearing and rod assemblies were test fitted to the crank/base unit all the clearances look great..
Nov 17, 2019, 09:31 AM
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spent a few weeks out of town on an unplanned trip,, did get a few hours back in the shop late this week,, connecting rod tops were machined and soldered to the bottoms,, needed to make some 1/8 inch spacers for the frame feet to solve an interference between the frame and connecting rod bottoms (some things just can't be scaled down enough) the entire bottom end is ready to be cleaned, finished,drilled and bolted together.. didn't have a camera on hand so pics will follow in a few days,, as the rest of the engine work is not as custom as the base and frames (plus many of the parts are started) hopefully progress will be a little faster.. did complete a modded handwheel to replace the small wheel on my mills Z axis,, it works great and gives much finer control..
Last edited by tghsmith; Nov 17, 2019 at 09:42 AM.
Nov 17, 2019, 10:10 AM
Latitudes vs Attitudes
Bob Gaito's Avatar
That layout fluid (Dykem) can be a little messy-for those small jobs, I have taken to use a magic marker with a nice square tip..scribes show up just as well and the applicator is very convenient. Is that what I see on the rods?

Quite amazing to see it coming together!
Latest blog entry: Mark V Navy Seal SOC
Nov 18, 2019, 04:23 PM
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the dykem might be a little messy but I have a bottle to use up.. had the entire bottom end set together this morning and all was turning over well.. doing a little more work on making sure the frame feet are all level in the same plane so nothing will bind when they get bolted to the base.. the con-rod pins will get drilled and tapped for the piston rods and a lock nut..
Nov 19, 2019, 08:42 AM
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tried something to get the frame feet perfectly level,, shims and bedding compounds were used to do this on the full size engine,, JB weld was added the the feet bottoms,, after curing with all clamped in the jig it was wet sanded down on a known flat surface.. as the frames sit on the base with the weight of the block all spins nice and freely,, not to mark, drill and bolt..
Nov 19, 2019, 12:36 PM
Recreational Engineer
Tom Harper's Avatar
Is that the USS Olympia in the background?
Nov 19, 2019, 01:25 PM
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USS Raleigh,, C8
Nov 19, 2019, 08:14 PM
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legs bolted to base, all turning nicely, time to remove the ST mount tabs from the block (point of no return) got news that I have a steam pitched prop on the way..
Last edited by tghsmith; Nov 20, 2019 at 03:12 PM.
Nov 22, 2019, 01:57 PM
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back on the lathe for a bit,, turned the cylinder tops and bottoms,, still have to machine the overlap sections, but getting close to getting the block and frame together..


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