Borderer Cast iron scratch build

Hi Chaps,

The beginning of a new engine built from stock no casting

Of the Borderer design with 5/8 bore 5/8 stroke majority built from cast iron

Reversing gear too!

Pictures of parts as I make them !

Edit Jo: Please post the bits of your engine as you make them not only the copyrighted drawing.

Plans

Edit Jo: Full drawing sheet removed due to copyright infringement.

No problem Jo,

Here’s the crankshaft sorted

Gone for more traditional counter weights, Nice and true and spot on dimensions

That's a nicely executed crankshaft. Well done!

Cheers!

Here’s the cylinder blank in cast iron

A fair bit of machining to do on this stock !

One side’s channel machined

Here’s the cylinder blank ready to bore

I’ve got to wait on drills and reamers to do the next step!

Here’s the bed plate in Cast iron, Just in checking the crankshaft clearance I have noticed the same too close tolerance between the crank webs and the inside of the bed, not a big problem to create clearance but what I’ll do is lay the crankshaft tight so to speak and then only relieve what’s needed, maybe 0.5mm per d end would work

I’m not going to raise the crankshaft line as I had previously done on the Gun metal Borderer I’m nearly finished on …..

Here’s the crankshaft being laid … All went well just a little adjustment on the middle bearing block height wise to get a smooth running shaft

Hopefully the drills and reamers arrive soon to make the bores

Here’s a little more done ✅

One con rod / big end made and fitted

I went with bright mild steel no plating, I think this engine will be a shelf Queen not fitted to a boat so I figured keeping everything oiled will be fine and look authentic,

There are a few bits to make from bronze which I’ll do soon after the cylinder block is done

You continue to make good progress Ricky 

I know it's an early question - but what kind of finish do you have in mind - painted or ?

Per   

Hi Cheers


Yes it’s coming on well !

I think for this one a natural finish on the steel parts , I may nickel plate the brass/bronze then have a black lagging cover across the cylinders…. Probably no paint bar the red ring on the flywheel

Here’s the bottom end pretty much done ✅

I made 3 silver steel oil cups , rod and bearing and the collums

Temptation was there to take a picture with the cylinder perched on top !!

Not put a lot of time in today but here’s the flywheel sized up true and ready to paint

It was a Stuart models one so a little smaller but should pass !