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Old 01-22-2009, 01:35 AM   #1
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Default MY Seadog

Hi All,

I am in the process of powering up a model tug. To do that I am building a "Seadog" as sold by Scratchdog Motors and as featured in Model Engine builder.

1" bore and stroke 4 cycle of a distinctively "Westbury" style.

The engine will be built for RC, and I would like to finish her out in traditional early 1900's flare....bling if you must.

I intend to put a forward/reverse transmission and a centrifical clutch for operation.

There are some changes from the original, some for "use and abuse" sake and some because as the president ( small p ) of my own engine manufacturing company, I get to choose the "Bling"

This is my first IC engine.....but not my first engine....if you know what I mean.

So here's where we are:


Boring and facing the crankcase


Timing case started

Timing case on the block

Setting up to make custom bolts

Filing rest set up for Hex heads on bolts

Hex Heads complete...about 2 minutes per bolt.


boring the timing gear cobore

boring the cam gear cobore

first operation on timing gear cover casting.






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Old 01-22-2009, 01:39 AM   #2
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Second op on cover

Cam gear in place on locating button and positioned for proper mesh.

Camshaft bore boring fixture with cover in place ready for mounting on the faceplate


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Old 01-22-2009, 01:41 AM   #3
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Default Re: MY Seadog

Dave,
That's looking great! How long did it take you to get to this point?


Kevin

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Old 01-22-2009, 01:48 AM   #4
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Helping hands.....thanks little girl!

Locating the fixture off the locating button.....next put the cover back on and

Cover bored for outboard bearing and timing cover housing spigot.

Cam tunnel bored.....cover removed first.
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Old 01-22-2009, 01:50 AM   #5
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back crank case cover removed showing 1/4" shaft going thru three ball bearings in three parts.

The cam boring job was a Saturday morning. I would say I have about 30 hours into it so far...with fixtures and such.

There will be a good bit of casting clean up for good looks, but that won't be so bad

The hole where it all happens.....
Dave
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Old 01-22-2009, 02:08 AM   #6
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The tumbler transmission

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Old 01-22-2009, 02:22 AM   #7
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Blingspiration

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Old 01-22-2009, 03:05 AM   #8
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Uh Oh ! Another gotta-watch-it-come-to-life.

Thanks Steamer for taking the time to show us your work.

earl...
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Old 01-22-2009, 03:24 AM   #9
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Default Re: MY Seadog

Steamer;
Thanks for the education - I'm the noob around here - there wasn't a photo here I didn't learn something from! Question - the second photo shows what I initially assumed was the equivalent of a milling plate attached to the faceplate; but then I noticed the holes are thru drilled but not threaded. Can you explain the use of this plate? Why are the holes not tapped?

Later photo's show non-drilled plates (fixtures?) used to attach castings to the faceplate - those appear to be methods of jigging that allow later removal from the faceplate and secondary machining operations to be performed without part removal from the jig. Correct?

All this curiosity stems from sitting around waiting for a back ordered copy of "Workholding in the Lathe" by Tubal Cain to arrive.....

Thanks
Garry

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Old 01-22-2009, 03:27 AM   #10
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Default Re: MY Seadog

Dave,

That's really nice work you are doing.

Some of your mounting techniques are inspirational.

I reckon its going to be one really special engine and tug boat.

Best Regards
Bob



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