(F) The 2009 Snowflake Challenge -- Gn15 Crane

Caption competitions, competitions run by The Management (ahem) or just a challenge you'd like to set your fellow 'boxers, this is where to put them!

If anyone finds a challengney type thread elsewhere can you PM me the number and I'll carefully copy it over into this forum.

If anyone's wondering why I've done this ... wait and see! :-)

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gfadvance
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Postby gfadvance » Mon Feb 01, 2010 7:33 pm

Not finished but getting closer with the paint job ...... struggling a bit to find a really flat varnish so if anybodys got any ideas grateful if you would let me know. One detail shot, scuse the funny angle

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And a couple of standard shots

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I may actually make the deadline - which would be a first for me!
Gordon F

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Postby gfadvance » Wed Feb 03, 2010 3:56 pm

Decided to re-paint crane, so here are the final shots of the completed project, a bit too rusty and I have muddied the colours a bit by overworking but the fun is going out of this one ... so time to stop

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So now I intend to sit back and watch the rest of completed projects roll in.
Gordon F

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PeterH
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Postby PeterH » Fri Feb 05, 2010 7:24 am

Every steam crane needs an engine:-

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and from the operator's end, looking towards where the crane itself will be:-

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Across the top shaft are dog clutch (with handle to operate), brake drum (with foot pedal), winding drum, big gear, then the other side. The handle in the middle controls the valve-gear.

Again, thanks to DCRfan for prototype steam winch photos; this is a log hauler in a museum:-

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The operator controls have been painted red, and are on the left because the operator stands beside the hauler. On my model I have reengineered it for an operator on the platform between the winch and the boiler.

As I get towards the pointy end there is more detail, and my modelling speed slows. I thought before this that small steam engines like these were much simpler than standard locomotive engines, and was disconcerted to find they have the same plumbing. It needed some selective compression to fit into the required width (the cylinders & rods are 'extensions'). I fitted representations of the eccentrics, but luckily the valve gear itself is pretty much hidden by the winding drums...
Peter

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Adrian
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Postby Adrian » Sat Feb 06, 2010 5:05 am

Just an update on my (slow) progress......

First the jib....I decided that it needed one of those thingymajigs that tells the operator how much they can lift at different angles.

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The plate was just a piece of plasticard while the pointer is fashoned from brass bar shaped with a 'Dremel' type tool fitted with a cutting disk. The pointer is held in position with a Peco track pin.
To check if the indicator was actually working I lowered the jib and.........

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While the angle pointer did the right thing ... Ooooops :oops: ... The jib lifting chain caught on the top edge of the cabin ... this is not a good thing :!:

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However a few bits of ply provided a channel for the chain to flow though and allowed the jib to lower further.
(Thinks to self ... must really produce drawings of these things to avoid this sort of Ooopsical :oops: )

The hook is made from a small brass screw eye and a lead fishing weight, with the usual paint & graphite treatment.


Well ... could not find a suitable screw eye so I had to use the 'brass carving' method to produce my own hook.

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Although I did use a commercial block and pully that has been sitting in the spares box for more years than I can remember.
I had to have a pully on the hook otherwise it could twist around and it would be impossible to hook onto anything.

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With a fishing weight these item glued together made the hook.
Unfortunately it was while drilling the weight I pressed a little too hard on the pliers and then had to spend sometime filling up the gouges that I had produced.

The next major job is to build the PCB with the DCC/motor interface ... why do I do this to myself :?:

Cheers
Adrian Hoad
I might be daft but not stupid.

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Postby PeterH » Tue Feb 09, 2010 8:40 am

I've been wondering what kind of crane will head my menagerie of wagons:-

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A bridge crane, used to repair bridges (not to make them obviously). This crane arrangement is called a scotch derrick: the vertical post rotates, often pulled by ropes by hand. Bridge cranes are long and skinny and are saved from toppling off by not needing to rotate very far.

Here is a link to a bridge crane doing what it does:
http://www.worldofstock.com/closeups/VIN1042.php

Now, a quick slap of paint & I'm done.
Peter

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gfadvance
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Postby gfadvance » Wed Feb 17, 2010 11:40 am

One shot just to document final completion, now including the stabilisers!

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Gordon F

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Postby PeterH » Thu Feb 18, 2010 8:18 am

Well, the boys at Huia foundary wanted to finish the new crane before the weekend, so they wouldn't miss friday night drinks, or the game on saturday. The crane has gone up the tramline for some urgent repairs at Stoney Creek bridge

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but will be back for the makers photos on saturday.
Peter

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Postby Little Andi. » Thu Feb 18, 2010 9:55 pm

And here too is my declaration of intent and documentation of completion.

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............. The Gn15 crane;- "AMS - N°3"


Gentlemen...........all the very best of luck.
KBO .......................... Andi.

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Postby Will Vale » Fri Feb 19, 2010 2:44 am

In the interests of encouraging the less-than-finished, here's my very much less than finished crane. It told me quietly that when it grows up it wants to be like all the proper cranes in this thread.

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Bonus points if you can figure out what the engine and hydraulic pump are from.

Will

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Postby joe gilmartin » Fri Dec 21, 2012 10:41 pm

Hey Guys
I still have till Feb 18 ......Right?

It's some kinda time warp ("let's do the time warp again ... first you move to the right ...)

Well Maybe a Mayan ... Harmonic Convergence Thing.

But ... I'm almost done with my Crane

A couple pics before paint (she's just stuck together for pics)

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AHHHHH...... wouldn't o won anyway ....It's Gnine

just takes me a little longer

Cheers
JH Gilmartin

Sole owner/operator
Moskito Coast Transfer Line

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joe gilmartin
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Postby joe gilmartin » Sun Dec 30, 2012 4:53 pm

I need some help!

I've primed her up and temp rigged the boom; my question now is what color to paint it?

My paint tends to be faded, rusty, washed-out and well used , but I have no clue as to what to start with.

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You can see by the missing axle box she'll be on a rip track
Suggestions please!

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JH Gilmartin



Sole owner/operator

Moskito Coast Transfer Line


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