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Chavez Junction
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 Posted: Thu Dec 3rd, 2015 11:34 pm
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Salada
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Thanks John - you may see yourself referred to in a later post ! (I think it is you anyway).

Never having built any 'weeny-gauge' before I decided to build a trial switch before tackling the actual Chavez ROW.

As a trial I opted for 9' switch rails with a departure angle of 28:1 onto a 34" rad curve. The DRG used a 23:1 angle for their 9' switches but I wanted to try out a K27 on it. Other than that I adopted DRG prototype dimensions where possible.

The "Bernd-O-Herb" style rail bender worked a treat after a few attempts, a great tool :






Next came the common crossing (frog) :





Then the outer stock rail & the straight closure rail, after which came the inner stock rail :





Setting the 'Heel Spread' to a 28:1 departure ratio :





OK, a bit of wiring & time to raise steam.  D&RGW No 453 proudly runs onto the trial switch after crossing Death Canyon :





Over the departure road - these K27's are so low slung that the cylinder drain cock rodding almost touches the rail-head :



 

Chavez Division super-power !! :





Both K's successfully negotiated the new switch - which is more than can be said for Mr Bachmann's stuff - see next post.


Regards,              Michael

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 Posted: Fri Dec 4th, 2015 01:29 pm
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Shoulders
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Hi Michael

Love the locos and nice point work though the finished article would be nice to see with out a loco running on top of it.

I would say don't worry about your point work, I bet it is perfectly fine. The reason I say this is that all my chivers kits (what ever wheels they use), Romford wheels and Gibson wheels run through my diamond crossing perfectly fine, the Bachmann stuff just falls off. Think its the crap profile on the wheel flange, very rounded, after fiddling with the track slightly (making it sloppier)they ran ok.

Keep up the great work



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 Posted: Fri Dec 4th, 2015 02:00 pm
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Herb Kephart
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I feel that you have overlooked something in your search for a tree in the forest.  Post #37 pix #5 and 6 show the answer to your space problem. You can probably find a modeler with more space to take the K's off your hands.

Herb



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 Posted: Fri Dec 4th, 2015 03:39 pm
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Salada
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G'day Herb  (Oops, wrong accent)  Howdy Partner',

I guess you refer to the extra narrow, narrow gauge - a top secret project. No, you can't have 'em !. Stick to your overhead 'lecky wire "railway".

Daniel :  Ah, obviously the voice of experience !- you are correct, next post will refer to Bachmann wheel standard problems or back-to-back irregularities or some other problem. I haven't found the exact trouble yet but I'll look at their tyre profile following your comment.  And 'Yes', an experimental easing of track dimensions/tolerances has improved the B's fail-rate. Thanks. 

Regards,           Michael

Last edited on Fri Dec 4th, 2015 03:42 pm by Salada

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 Posted: Sat Dec 5th, 2015 09:03 am
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Si.
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Hi Michael.

Nifty switch soldering Sir Salad !

" Chavez Division super-power !! "

HOLY COW !

Blue & Brown, straight into the A.C socket...
...that musta been a double-headed through-EXPRESS !!

Cheers.

Si.

:moose:



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 Posted: Sat Dec 5th, 2015 10:08 am
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Shoulders
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Probably need 240v Si with the weight of the things. lol..:bg::P

Dan



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 Posted: Sat Dec 5th, 2015 04:27 pm
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jtrain
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Hi Michael, that looks like some fine progress!  When does the bench work go up?

Hand laying track is very much an art form (one which I haven't perfected yet)  but based on results seen here on freerails and in person on some layouts, hand laid track really does look quite nice when finished.  It just takes  A LOT of patience... and some swear words.


Keep us all posted, it looks like the layout is coming along nicely.  Certainly a unique idea to lay track first and then build the bench work to suit.

--James:thumb:



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 Posted: Mon Dec 7th, 2015 07:59 pm
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Salada
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Si:
just wait until you really will see a double-headed K27's freight rumble through the Junction ! (that IS the plan). Maybe with a rear 2-8-0 helper onto the "high line" ?!?!.

Dan:
thanks for the Bachmann wheelset comments - spot on, as you will see below.

James:
Hello there !. Yup, it's being built backwards - for various reasons to be explained later. First some of the more complex track "panels" & multiple switch arrangements (exactly as the 1:1 prototype does), then some baseboard decisions & finally the benchwork ! Then drop the pre-assembled & pre-tested track 'modules' into place; probably also pre-ballasted. I used to be the Marx Brothers script-writer !.


                                            xxxxxx-----xxxxx


My decision to test out a trial 'experimental' switch largely based on D&RGW prototype drawings & dimensions, rather than rush straight in to building the actual Junction, paid off well.

As seen above, the 2 K's performed spotlessly but the Bachmann Consolidated failed every time. Eventually traced to faulty brake rigging, as below :





If you look carefully below the cabside No. 27 a trailing brakeshoe is below the railhead. To be fair to Mr B. this is a 2nd hand loco bought supposedly "as new" but all the brake rigging is faulty - impossible to attach it to the correct trailing mounting points (as though the rodding has shrunk in length ??). Now booked for an 'Intermediate Heavy' slot in the Shop. I MUST fix that road-name somehow !.

The Bachmann cars achieved a 60-70% fail rate, often 'splitting' the switch toes, as below :





This was mostly caused by the Bachmann wheelsets fouling the switch rail heel, where the switch rail meets the closure rail (marked 'Heel' on the drawing), as below :







The Bachmann wheels ride up onto the straight thru closure rail rather than taking the diverting track. Annoying seeing as the 2 K's didn't fail once.

Following Dan's suggestion I examined the Bachmann tyre profile - put simply it's RUBBISH, nothing like the correct profile. Increasing the heel spread has now mostly cured the problem though has slightly spoilt the switch' prototype appearance.

Finally, how to do the job properly ! :






More next time & thanks Dan,

Regards,   Michael  


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 Posted: Mon Dec 7th, 2015 09:29 pm
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Shoulders
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Hi Michael

Great test rig for trials and errors, especially with them big bad boy K-Classes.

Could make one suggestion: Get rid of that hell joint, theres no point in it in these scales as the rail will flex enough with out any stress, plus it will prevent wheel derailments and you won't have any electrical problems. just make the switch blade one piece up to the vee crossing rail brake and just slit the top slightly to make it look like a rail joint at the hell and use exactoscale E4XX FP01 4mm sclae fishplates (they should work and look right with this gauge track) to stick onto the side of the rails to make it look like a rail joint.

Cheers Dan



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 Posted: Mon Dec 7th, 2015 09:32 pm
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Shoulders
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Sorry got a question:

Where did you get the track bender from? could you please pm me..

Kind regards Dan



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