Live Diesel-Mechanical 1/12th scale

Can you give the reference for the centrifugal fan, please? I may have the use of one in one of my projects.

Thanks,

Saint-Oblas wrote:

Can you give the reference for the centrifugal fan, please? I may have the use of one in one of my projects.

Thanks,

Search in eBay for:
60mm x 28mm 6028s 2 Wire 12v DC Brushless Blower Cooling Cooler Fan

Best wishes,
David.

I found this one:

http://www.ebay.fr/itm/60mm-x-28mm-6028s-2-Wire-12v-DC-Brushless-Blower-Cooling-Cooler-Fan-/261436732666?pt=LH_DefaultDomain_0&hash=item3cded7f4fa

but you wrote about one from Germany which looks made from aluminium. I do not think this one match.

Saint-Oblas wrote:

I found this one:

http://www.ebay.fr/itm/60mm-x-28mm-6028s-2-Wire-12v-DC-Brushless-Blower-Cooling-Cooler-Fan-/261436732666?pt=LH_DefaultDomain_0&hash=item3cded7f4fa

but you wrote about one from Germany which looks made from aluminium. I do not think this one match.

I am using the one shown in your link.  It's the steel mounting bracket that you can see.

The one from Germany is a 50mm x 15mm normal axial type.

Best wishes,
David.

Thanks for your answer. It may be interesting since I plan to use the same engine (but unfortunately without pull-start).

Hi Dave,

Sharp looking loco on the last pic.
Why did you decide not to use the centrifugal fan?

Tacbob wrote:

Sharp looking loco on the last pic.
Why did you decide not to use the centrifugal fan?

Thank you Lorenz, I like the twin fan look.

I am using the centrifugal fan, hoping it'll draw in cooler air from that side vent.

I thought that the axial fan would be drawing hotter air from the silencer box.

Best wishes,
David.

Hi Dave,

Ah, see. I guess it'll be a good cooling system with 3 fans. Hope you are able to test it soon.

Here's a higher view of the centrifugal blower fan.  It's held on to the silencer by a steel bracket, I followed the outline of the blower.



Phew! The new loco can still pass LGB stock in the sidings with normal track spacing.  I'm about to reinstate the sidings on my line.  1/12th scale meets 1/22nd scale. The LGB open trucks look OK behind the loco. I know it's a bit sinful...



Best wishes,
Dave.

The mine waggonet:



would fit perfectly to your loc.

It's only a small issue, but I accidentally blew the 2.5V bulb in the headlamp by applying 6V to it.  When I went to replace it, the new bulb was a good 1mm longer.  It turns out that the original bulb was malformed and too short.  I based the whole headlamp around that bulb, so I had to make an extender cap to fit over the rear cover.  I've shifted to using 5.4 V bulbs from eBay now...



I've got a neat PWM controller from eBay to dim the headlight.  I've been unsoldering the potentiometer from the PCB to remote mount it behind the headlight, I need the PCB to be horizontal.


Best wishes,
Dave.

belle réalisation et prudente

tram47 wrote:

belle réalisation et prudente  

Merci beaucoup!

I noticed some coarser mesh at my local DIY store.  I spray painted it the loco colour, I couldn't spray the finer mesh, I'm sure it would have all clogged up.  This mesh was quite loose, I'm fairly sure it's zinc.  It looks great now, and is much more rigid after painting.

I think Lorenz will like it more





Best wishes,
Dave.

It looks very much like this:

Saint-Oblas wrote:

It looks very much like this:

S-O that is so ugly

---

Finally, I have something to show.  The cooling arrangements have been wired-up and connected.






As soon as the bonnet is fully slid onto the loco the blue micro switch powers-up all the electrics.  The electrical connector provides power for the loco mounted blower.  There's 4 AA cells in the battery holder.  The toy-like smooth exterior has been preserved with no through bonnet fixings for all the bits and pieces.



Best wishes,
Dave.

Hi Dave,

Still a beauty. What do you control with the poti on the bonnet top? The fan speed?

Tacbob wrote:

Hi Dave,

Still a beauty. What do you control with the poti on the bonnet top? The fan speed?

Hi Lorenz, its the on/off and dimmer switch for the headlight.  It looks really good dimmed, like the NZR locos running in daytime.  The fans run full speed.  Interestingly the alkaline dry cells cannot provide enough energy, and the fans slow when the light is turned on.  But, with my eneloop batteries installed the headlight makes no difference and the fans run faster too!

Best wishes,
Dave.

Hi Dave,

Will you hide the switch underneath a fake cyclone air cleaner?


Electrics and electronics are always a kind of mystical .

I was asking myself the same question about hiding the switch button.

Tacbob wrote:

Hi Dave,

Will you hide the switch underneath a fake cyclone air cleaner?

Bearcastle wrote:

I was asking myself the same question about hiding the switch button.

It isn't a priority at the moment chaps.  I'm looking forward to getting the big diesel roaring again, and then onto painting.

Best wishes,
Dave.

I wish I already would be as far as you are.

Here's une petite video of the bonnet / hood in operation.  The two small fans on the front take about 50 seconds to reach top speed.



Best wishes,
Dave.

HI Dave,

Nice sound. Almost like a real diesel electric. I really like youre main switch solution.

Tacbob wrote:

Nice sound. Almost like a real diesel electric. I really like youre main switch solution.

Thank you Lorenz.

I don't want to have to remove the cooling hood when topping up the fuel so I've mounted an extension filler pipe on the right hand side behind the buffer beam.





Some people ask if I have any drawings, well here's a circuit diagram I drew to work out the electrics.  I didn't use the switch in the blower wiring in the end.



Best wishes,
Dave.

Hi Dave,

Will you still make a cap for the filler?

Tacbob wrote:

Will you still make a cap for the filler?

Here you are Lorenz, a chunky filler cap.





Best wishes,
Dave.