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 Live Diesel-Mechanical 1/12th scale

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dewintondave




Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyTue Apr 01, 2014 4:40 am

Sekim wrote:
Did you consider cone clutches where you have used dogs and have you any detail pics of the dog clutches you could share?  I have a chum with a working “Smiths of Rodley” model steam crane and this uses cone clutches for all the main actions/winches etc.  They engage, drive and disengage cleanly and with your gate gearbox should work a treat.  Perhaps a thought for your next engine!
 
Hi Mike,
 
No I didn't consider cone clutches.  I'm using two-dog dog clutches.  These gears aren't for changing on the move.  The flywheel has a tapered clutch.

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09573e
 
I'm looking forward to moving on from the gearing now, and getting onto the other things like the rods and the bodywork, and perhaps new frames.
 
Best wishes,
Dave.
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptySat Apr 05, 2014 7:07 am

I've had to extend the frames forwards 10 mm.  The front of the carburettor was directly inline with the front buffer beam.  The engine couldn't go back any further...
 
The chassis with one side frame off for lengthening.
Live Diesel-Mechanical 1/12th scale - Page 3 DSC00318_s
 

Now the frame is 10 mm longer.
Live Diesel-Mechanical 1/12th scale - Page 3 DSC00324_s

 
The new graceful proportions.
Live Diesel-Mechanical 1/12th scale - Page 3 DSC09586_s
 
Best wishes,
Dave
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k&nwlr



Location : Alsace, France

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptySun Apr 06, 2014 1:19 pm

Can´t wait to see the finished product!
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptySun Apr 13, 2014 6:53 am

The rear suspension is far too bouncy.  Some things are good being bouncy but not this loco. 



As a trial I had used a gauge 1 inside frame type suspension, it doesn't look the best on this application. 

Here we are, I'm making horn plates for a new suspension arrangement on both axles.

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09596_s

Best wishes,
Dave.
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptySun Apr 20, 2014 7:10 am

Milling the axle box slots out of the first frame side.

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09598_s


Here's the new horn plates in position on one of the frames.

Front
Live Diesel-Mechanical 1/12th scale - Page 3 DSC09603_s

Back
Live Diesel-Mechanical 1/12th scale - Page 3 DSC09604_s

My project this week is to make some axle boxes.

Best wishes,
Dave.
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https://www.youtube.com/user/dewintondave
dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyWed Apr 23, 2014 4:57 am

Here are two new axle boxes.  I shall think about the springing and the keeper plate before I start on the other frame.

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09607_s

Best wishes,
Dave.
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptySat Apr 26, 2014 4:36 am

I had to use coil springs as I couldn't fit leaf springs in. 

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09613_s


Live Diesel-Mechanical 1/12th scale - Page 3 DSC09615_s

Now I have to do it all over again for the second frame.

Dave.
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Tacbob



Location : Harz, Germany

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyTue Apr 29, 2014 6:44 pm

That's just great Dave. Is the lever arrangement the final one or just for testing? Do you have an overflow outlet in your main transmission box to let the engine oil out? The idea with the horn plates is really interesting. How many leeway is there between the axle block and the horn plates? I'll keep watching Smile

_________________
Lorenz
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Saint-Oblas

Saint-Oblas

Location : Lyon, France

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyWed Apr 30, 2014 3:38 am

What a wonderful piece of mechanics! I am amazed! Are you a clock builder?
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyWed Apr 30, 2014 7:00 am

Tacbob wrote:
That's just great Dave. Is the lever arrangement the final one or just for testing? Do you have an overflow outlet in your main transmission box to let the engine oil out? The idea with the horn plates is really interesting. How many leeway is there between the axle block and the horn plates? I'll keep watching Smile

Thank you Lorenz.  The lever is still temporary, I think I will connect it to a lever inside the cab.  I need to get the chassis rolling first. 
No overflow yet.
The axle boxes are quite a close fit in the horn plates, but have about 0.25 mm endways movement.

Saint-Oblas wrote:
What a wonderful piece of mechanics! I am amazed! Are you a clock builder?

Thank you.  No I'm not, these are quite chunky mechanics!   Smile 

Best wishes,
Dave.
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptySat May 17, 2014 9:10 am

Finally the chassis is rolling again...  I had to modify the clutch actuator shaft to allow full travel on the front axle boxes (the wheel flanges were contacting it) that took three days after I had worked out what to do!  I've switched the fasteners to mushroom headed screws, I think they look better.

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09619s

I need to make slightly longer axles now as the axle boxes stand out further than previous bushes.

There are a lot of no longer used holes in the chassis that need filling...

Best wishes,
Dave.
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyWed May 21, 2014 9:50 am

Well, I've managed to fill four holes with some more screws.

Here's a cover for the lower gears, I imagined that line-side vegetation would get caught and crunched up by the large 1st gear.

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09620

The cover fitted.

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09621

Looking down on the cover, we could fill it with oil too.

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09622

Best wishes,
Dave.
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GWhizz

GWhizz

Location : Charente, France

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyFri May 23, 2014 6:34 pm

Awesome engineering - can't wait to see the videos of it running bounce

_________________
Brian
Brian
also blogging at
www.frenchgardenrailways.com
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptySun Jun 01, 2014 3:10 am

GWhizz wrote:
Awesome engineering - can't wait to see the videos of it running bounce

Thank you!  Well, we are one step closer.

Here's the footplate, all one piece, lots of sawing and filing.

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09626_s

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09628_s

It weighs in at 3.4 Kg (7 lb 7 oz) now.

Best wishes,
Dave.
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dtsteam

dtsteam

Location : Preston, England

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptySun Jun 01, 2014 12:32 pm


  1. Your workmanship is absolutely pin-sharp and a joy to see. It will be one of those models which would be a shame to paint.
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyMon Jun 02, 2014 7:27 am

dtsteam wrote:

  1. Your workmanship is absolutely pin-sharp and a joy to see. It will be one of those models which would be a shame to paint.


Thank you!  They never work as well after painting either.

I had a big shock when the cab was mocked-up in card today, it's enormous!

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09635_s

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09636_s

Best wishes,
Dave.
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Tacbob



Location : Harz, Germany

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyWed Jun 04, 2014 10:39 am

Hi Dave,
A real beauty. I wish I'm that far. Can you guess what pressure your clutch is working with? What servo have you planned to use?

_________________
Lorenz
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyThu Jun 05, 2014 7:13 am

Tacbob wrote:
Hi Dave,
A real beauty. I wish I'm that far. Can you guess what pressure your clutch is working with? What servo have you planned to use?

Thank you Lorenz.  I've just been pressing down on the kitchen scales, I'd say I was using a force of 5 to 6 N on the lever, the lever magnifies the force by about 3.5:1  So perhaps 18 N or 1.8 Kg in total.  I'm planning on keeping the loco fully manual with perhaps all the controls on the rear of the cab.

Best wishes,
Dave,
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Tacbob



Location : Harz, Germany

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyThu Jun 05, 2014 7:30 am

Hi Dave,
Many thx for your reply and your measurements. Do you have a loop track?

_________________
Lorenz
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyThu Jun 05, 2014 9:34 am

Tacbob wrote:
Hi Dave,
Many thx for your reply and your measurements. Do you have a loop track?

Hi Lorenz, yes, it's a simple loop.

Best wishes,
Dave.
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyMon Jun 30, 2014 7:03 am

Slow progress recently.  Ended up cutting out the cab pieces by hand after wasting time and money on a scroll saw.  Then spent a week waiting for a metre of 1/8" brass half round beading to arrive; to edge the window openings and doorways.  The metre length wasn't quite enough, but the front and both sides are done.  I've got some more on order for the rear sheet.  It's quite an enjoyable process soft-soldering the beading.  The most important part is annealing it first, otherwise it is far too stiff.

I need to have the superstructure finalised so that I can progress the exhaust, fuel tank, and controls.

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09764_s

Best wishes,
Dave.
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptySat Jul 12, 2014 6:40 am

Here we are.  The cab is well on the way to completion.  Soon it will be time to start on the bonnet.

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09781_c

Best wishes,
Dave.
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k&nwlr



Location : Alsace, France

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptySat Jul 12, 2014 6:23 pm

A joy to behold. Hope we see it in action soon.
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dewintondave

dewintondave

Location : New Zealand

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyWed Jul 30, 2014 8:54 am

Here we are, I've bent up the bonnet in the wood vice.  I like the end-on view, it's got that menacing look of the truck in "Duel" (I could put some battered old engine nameplates along the buffer beam of victims, lol).

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09805_s

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09806_s

Live Diesel-Mechanical 1/12th scale - Page 3 DSC09828_s

Best wishes,
Dave,
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Tacbob



Location : Harz, Germany

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyWed Jul 30, 2014 8:32 pm

Just fantastic. You got a nice work shop.
Will you have space for the fuel tank in the loco?
How many castor oil do you add?

_________________
Lorenz
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Saint-Oblas

Saint-Oblas

Location : Lyon, France

Live Diesel-Mechanical 1/12th scale - Page 3 Empty
PostSubject: Re: Live Diesel-Mechanical 1/12th scale   Live Diesel-Mechanical 1/12th scale - Page 3 EmptyThu Jul 31, 2014 5:40 am

Really a nice piece of craftmanship! I assume you have a well-equiped shop, and sure you know how to use it!

I see that you too have difficulties in getting raw material. In France it is quite the same and I have sometimes been waiting months before being able to get some very common material, but I do not want to purchase 6m if I only need 20cm! I have sometimes to beg from craftman shops that are become rarer and rarer!
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