Steam Launch Borkum by neptune - Krick - 1/12 scale - with steam engine built from Stuart Turner castings

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neptune
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Steam Launch Borkum by neptune - Krick - 1/12 scale - with steam engine built from Stuart Turner castings

Post by neptune » Mon Nov 06, 2017 9:22 am

I would like to re post this build log on SOS forum, I started building this kit and engine a couple of years ago and I am still working on it, hope you enjoy.



G'day all,  I am building a Steam launch kit made by Krick, it is the Borkum 1/12 scale, it has an ABS hull, and all the rest is wood so I hope it is OK in this section of the build logs.


I am installing a steam engine, it is built from a Stuart Turner casting set along with various brass bar and brass and steel rod,
 I have all ways wanted to build one of these and I must say that if any model engineers look at this log please understand it is my first and probably only attempt at this.

on approximately the second page of this log I start building the launch.

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  This shows what comes in the casting set.

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This is how I set up to machine the Standard, the main upright piece that holds and guides the con rod, the piston and also the pot that goes on top.
  the dowell was a really tight fit and with the use of the live centre suported the standard.

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machining the feet of the standard,          (  I can hear all the real machinists screaming in agony )

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  machining the seat of the standard

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The sole plate and box bed as supplied

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This  is called the sole plate and is shown after machining and the holes have been drilled and tapped
and also the seats for the bearings have been filed.

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Checking the bearings against hte seat.

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neptune
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Re: Steam Launch Borkum by neptune - Krick - 1/12 scale - with steam engine built from Stuart Turner castings

Post by neptune » Mon Nov 06, 2017 9:30 am

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The pot or clynder as supplied, next to it are the brass for the piston and the steel for the eccentric sheave


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The pot after boring and maching.
 

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The pot after milling the start of the steam channels.
  also shows the drilling and tapping, in the background you can see the lid.

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In the process of turning the piston, mostly they just had three oil rings turned, but some had a larger groove
in which was embedded a cord soaked in graphite. The piston will be cut off where the wide channel is.

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checking for fit

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This is after the steam ways have been drilled and the piston finished and fitted to its rod.

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the piston, rod and small end after maching and fitting to-gether.

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Re: Steam Launch Borkum by neptune - Krick - 1/12 scale - with steam engine built from Stuart Turner castings

Post by neptune » Mon Nov 06, 2017 9:34 am

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 the fly wheel as supplied.

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Just finished machining the Wheel.

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neptune
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Re: Steam Launch Borkum by neptune - Krick - 1/12 scale - with steam engine built from Stuart Turner castings

Post by neptune » Mon Nov 06, 2017 9:37 am

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Next up is the crankshaft, they give you a piece of steel bar that has to be cut in two for
making the sides, I cut it in two and soft soldered them to-gether for drilling the holes foe the shafts
to go through.
 the pic shows the bar marked out for drilling.

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they give you one length of steel rod to cut the shafts out of,
 So I cut the small shaft first and turned the ends down to size,
Then what is left goes through the larger holes in one length and is set in place,
they give you two options, either Silver solder or lock tite,
I chose to use Loctite and as an added precaution drilled through the bar and shaft and fixed a brass pin through
 you can see it in the pics.
24 hours later after the loctite has set I cut the middle piece out leaving the crankshaft as per the pic.

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Re: Steam Launch Borkum by neptune - Krick - 1/12 scale - with steam engine built from Stuart Turner castings

Post by neptune » Mon Nov 06, 2017 9:51 am

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These first three pics show the material provided for the big end and the small end


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Boring out for the Eccentric Sheave.


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This shows the Eccentric sheave strap and the big end bearings after machining


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another view


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crank shaft with big end bolted on


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 another view


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  and bolted in place through the bearings and onto the sole plate and box bed with the machined standard in the background.

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Re: Steam Launch Borkum by neptune - Krick - 1/12 scale - with steam engine built from Stuart Turner castings

Post by Aussie048 » Mon Nov 06, 2017 11:35 am

Hi John

You do amazing work and also share it. I will be watching this closely.

Cheers
Geoff
Aussie048

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Current Build Link:-
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HMS Triton Section Poseidon section

On Hold Builds:-
Santa Maria
Norfolk Sloop Delxue

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neptune
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Re: Steam Launch Borkum by neptune - Krick - 1/12 scale - with steam engine built from Stuart Turner castings

Post by neptune » Sat Nov 11, 2017 7:39 am

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  Turning the valve adjusting rod, a follower rest would have been handy, but I had to make do with drilling the end and using the live centre.
 

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  Tapping the valve slide adjusting plate, its just a mall plate thats sits in the valve adjusting assembly.
 

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This piece of brass was approx 1/2 inch long, I have drilled and tapped it 5ba, you can see it after machining in the next pic.


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  the finished valve rod, it has been threaded 5ba on each end, and the connecting link above after machining.

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How they will be connected together


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The enginge bolted to-gether temporarily to make sure everything fits
 
        Still have a ways to go yet, thanks for looking,
 

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Re: Steam Launch Borkum by neptune - Krick - 1/12 scale - with steam engine built from Stuart Turner castings

Post by neptune » Sat Nov 11, 2017 7:47 am

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A drawing showing the exploded view of the engine


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The top and bottom cylinder covers, the one on the left is the bottom cover showing the underneath, these were turned from a piece of cast iron approx 1 1/2 inches long and just over the finished dia size.


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Shows the bottom cover, this one has a longer length and it has a hole drilled and threaded for the valve gland nut which is sitting next to it, which was turned out of brass, in the bottom of the cover there has been drilled a small hole for the con rod to go through, when assembled packing is inserted into hole surrounding the rod and then the screw is tightened to compress the packing material to help keep in the steam.


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shows the nut in place.
 


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close up of the top of the standard


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shows the rod going through with the piston attached


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Top cover sitting in place
 


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overall view

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Re: Steam Launch Borkum by neptune - Krick - 1/12 scale - with steam engine built from Stuart Turner castings

Post by neptune » Sat Nov 11, 2017 7:58 am

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This shows the internal workings of the Valve Chest


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Shows the rod in place and the plate above waiting to be put in place


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The valve plate in position


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The plate pushed up showing the lower opening


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The plate in the down position showing the upper opening,


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 shows the eccentric strap and rod just held in position, luckily at the moment everything seems to move Ok, fingers crossed.

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Re: Steam Launch Borkum by neptune - Krick - 1/12 scale - with steam engine built from Stuart Turner castings

Post by neptune » Sat Nov 11, 2017 8:07 am

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I have now received my Krick kit of the Borkum Steam Launch, see attached Photo,


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  The box as delivered.
 


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These pics how the laser cut parts, they are very cleanly cut and the ply looks very good quality


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another view


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This and the next pic show the parts removed from the sheets, they just droped out.


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They in clude the parts to make a stand


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  The pack of strip wood which looks very good.

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