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| Posted: Mon Dec 18th, 2017 01:03 am |
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1st Post |
| Posted: Mon Dec 18th, 2017 01:22 am |
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2nd Post |
Alain Feypel
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Here my latest creation and also the one that took the most time.
I thought it was one year ago I began with this one,
but it is already 2 years now.
Most won't even know that this loco really existed.
Only 5 were built.
Information about this great locomotive can be found here:
http://www.gearedsteam.com/davenport/duplex/duplex.htm
When I first saw the picture, I thought I got to have one like this,
but nobody makes one in HO, in fact it does not exist as model at all.
So I had to build one myself, because you don't see one often or never.
Biggest problem was the driveline.
I didn't want to have a driveshaft running under the frame, like on the PFM Vulcan Duplex.
PFM made a nice loco, but for that price the driveshaft under the loco is unacceptable for ME.
It is not a Climax nor Heisler nor any geared steam locomotive which has a driveshaft under the frame,
so NO DRIVESHAFT under the frame.
Well, not an easy task getting adequate sized drivers, trucks to fit them in. and cylinders,
not to mention the idler crank has to spin faster than the drivers.
So I killed a few locos to build the drive.
I used 2 Meyer Idler gearboxes.
In first place I made my own out of brass but they failed horribly.
So Rivarossi offered the gearboxes.
This beauty is made out of parts of:
Bachmann Shay ... (Bunker and all the parts on the Boiler)
Bachmann Climax ... (Cab)
Rivarossi Meyer ... (Gearboxes, water hatches, cylinders, rods which were modified)
Rivarossi 3rd gen. Heisler ... (trucks, drivers and front light, coal bin 2 of them glued together)
PSC Shay ... (Air tank)
Boiler is a piece of copper piping.
Frame, parts of the trucks, some piping and grab Irons are brass.
The rest of the needed parts come from the scrap box.
I had to redo the motormount 3 times,
because one was too weak, the other too long, and the third was OK.
Oh yes, I know, measure twice cut once, that does not always work for me.
All the brass parts were painted with 2K-Urethane RAL 9005 paint (except grab rails)
the rest was done with Testors gloss black and then everything coated with Dullcoat,
followed with some weathering protected with another coat of dull clear.
The model is NOT an exact prototype copy because of technical reasons,
the locomotive would have been too long to fit everything to it.
Pictures will follow.
Alain
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| Posted: Mon Dec 18th, 2017 01:28 am |
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3rd Post |
Kitbash0n30
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That 6 axle Shay sure is something you're not going to see on every Walmart shelf!
There's so much really cool stuff on 'Geared Steam' ...
____________________
See y'all later, Forrest.
Screw the rivets, I'm building for atmosphere
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| Posted: Mon Dec 18th, 2017 02:25 am |
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4th Post |
Alain Feypel
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Here as promised the pictures of the Davenport geared duplex build.
(description in previous post)
Here the trucks I first intended to use, but with smaller drivers.
AWFUL!
I needed to get something better.
This was the beginning of trial and error, but it began to get good.
Here you see very good, the "magic".
1 wormgear drives the counterweight crank, the other the drivers.
Basically 1 1/2 Heisler-truck.
1st and 2nd gen. Heislers had metal wormgears,
which drove the wheels twice as fast as 3rd and 4th gen models.
So I have a gearing of 2:1, exactly what I needed.
The crank sits in a Heisler truck cut in half.
You will also notice the coupler box comes from a Climax.
I made some of brass afterwards. because the couplers were way too low like this.
After I found out that my idler gearboxes had a flaw and were binding,
I modified those from Rivarossi to fit my trucks.
The counterweight from a 45-Ton switcher was dumped,
and replaced with a slice of brass.
The brass frame.
The ashpan is hollowed out to fit the decoder later.
This was to give me some motivation.
The trucks with some brass as cover for the gears.
The boiler.
I first made one out of 3 pieces of copper piping (right)
but I had to take the one on the left, to fit over the idler gearbox.
The taper on the right one was better.
... so I used the one that would fit, and filled some solder over the area where needed.
Test-fit!? Yes it fits.
Next step please.
Drilling the holes for some domes and other parts.
Adding the bands, to be precise soldering them.
Now we are getting somewhere.
Some more motivation.
It looks like a steamer.
Comparing to the 6-axle Shay.
And here before painting.
Steampunk?
The painted parts (except the ones in the box).
Also important to me was, that it had to be maintenance-friendly,
so 95% of the parts are held with screws.
Parts glued:
air tank, ladders, pipe to the steam dome, boiler cover, sand boxes, bell and generator.
And finally:
 
The windows in the cab look like painted black,
but it is just the black tape inside the cab.
Lights aren't installed yet.
I also filled the bunker with pieces of lead,
also some lead is glued inside the cab roof, and in the front portion of the boiler.
Side note:
Some things had to be adapted to make it a running Davenport.
Resulting in, that some parts are NOT like in the patent drawings,
like the steam piping, or else the trucks could not pivot enough.
The video:
https://www.youtube.com/watch?v=JJ9znQBKNTs
It also runs as good in the other direction.
Alain
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| Posted: Mon Dec 18th, 2017 03:32 am |
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5th Post |
slateworks
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WOW!
____________________
Doug
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| Posted: Mon Dec 18th, 2017 05:32 am |
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6th Post |
Steven B
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| Location: | Virginia USA |
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Alain,
You are a true craftsman. 
It is a joy to watch the progress on your creations.
Thanks for sharing.
I hope to get back to work on projects soon.
The creative juices of others really makes my fingers itch to cut, slice and dice.
____________________
Steven B.
Humboldt & Toiyabe Rwy
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| Posted: Mon Dec 18th, 2017 05:53 am |
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7th Post |
W C Greene
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This thread is very impressive as are the locomotives.
This lets me remember the art of Mr. Bill Schopp.
That gent did the same type of "mingling and fixing" as Alain.
Schopp used available brass locos for his jobs,
remember that a brass PFM Shay or Climax, etc.
was priced around $50 to $70 then (1960's).
I am sure some of you guys remember Mr. Schopp, I know Herbie does!
Woodie
____________________
It doesn't matter if you win or lose, its' how you rig the game.
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| Posted: Mon Dec 18th, 2017 08:14 am |
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8th Post |
B&O GLENNWOOD
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Its good to see you sharing your work here.
I hope to see much more.
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| Posted: Tue Dec 19th, 2017 01:06 am |
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9th Post |
ebtnut
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I might note that there is, in fact, an HO model of a duplex.
PFM imported a Vulcan duplex back in the late '60s in brass.
Haven't seen one in quite a while, but they are around.
Google PFM Duplex.
But great work on bashing up this model!
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| Posted: Tue Dec 19th, 2017 03:13 am |
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10th Post |
Alain Feypel
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Hi ebtnut,
Yes I knew about the Vulcan, but unfortunately it isn't geared.
That is what makes the Davenport so interesting,
the look of a duplex, with the fast turning crank of a Climax,
sort of a hybrid.
The trucks from the Vulcan would also have been a good choice for my build,
but too expensive and hard to get here.
Alain
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