|
|
Post by Kez on Jan 25, 2024 18:33:02 GMT -5
Yes, the center axles of the SD40-2 and Tunnel motors have flangeless wheels on them, for intended reliable running on 195mm radius track.
|
|
|
|
Post by ztrack on Jan 25, 2024 20:21:56 GMT -5
Check out the video we did. It will answer a few questions.
|
|
|
|
Post by Rob Albritton on Jan 25, 2024 22:48:29 GMT -5
Do these locomotives have flangeless centre axles ? Yes. The initial production had flanged wheels. They suffered from poor performance. We switched to flangeless center wheels and performance became close perfect. What is the minimum radius they will go round - 195 or 220 mm ? Thanks for any help. 195mm radius recommended minimum. |
|
|
|
Post by ednadolski on Jan 27, 2024 21:41:01 GMT -5
Do these locomotives have flangeless centre axles ? Yes. The initial production had flanged wheels. They suffered from poor performance. We switched to flangeless center wheels and performance became close perfect. Could regular flanged wheels be installed, for use on layouts with sufficient curves? (Say, 12" or more radius)
Ed
|
|
|
|
Post by BAZman on Jan 28, 2024 12:59:11 GMT -5
What’s the point of doing it? From side, you see the “same” wheel (less the flange, course). You won’t see it unless you are looking at on a shelf layout 5” away.
First you have to get a truck to get the geared axle.
Electrical pick is the ‘same’
|
|
|
|
Post by ednadolski on Jan 29, 2024 0:26:30 GMT -5
What’s the point of doing it? More tractive power? (I am presuming, really it would need to be tested. Perhaps the difference is negligible anyway.)
Visually, it would probably only matter for close-up pics (or to the $6M man's bionic eye) 
Ed
|
|
|
|
Post by BAZman on Jan 30, 2024 18:07:53 GMT -5
Not really. All three axles are mounted to a horizontal "bearing" (hole in pickup strip). The axle is shear (not pointed) so rides straight through the pickup strip. The holes are slightly larger but perceivable. This is purposeful in maintaining traction, overall. If the holes were precise, there could be random stalling due to 'crowning'. This occurs when the middle axle lifts up between the outer axles when going over track that is not straight flat, like rail joints, points and frogs, etc. so even without a flange, it could still provide traction. However, there is no gear linkage to turn it. While a 3-axle design, it is only 2-axle driven.
|
|
|
|
Post by cwrr on Feb 1, 2024 7:37:38 GMT -5
It's February 1st, let's see the next SD40-2 release!
Wooooo!
|
|
|
|
Post by Tiest van Gool on Feb 1, 2024 10:02:01 GMT -5
I just received my Union Pacific and Santa Fe units and they are the most detailed locos I have ever seen. Absolutely stunning; cant wait to see the SD70AC units and hope they are of the same level. Thanks a ton AZL for my new trains! Tiest
|
|
|
|
Post by sjl on Feb 1, 2024 10:19:04 GMT -5
It's February 1st, let's see the next SD40-2 release! Wooooo! Already posted on azldirect.com ...  [joking] |
|
|
|
Post by Scott on Feb 1, 2024 15:58:11 GMT -5
Sjl, eh, … Couldya please post the link?
Mid-afternoon, EST—Not seeing “already posted” on ZtrackCenter. (We know that AZLDirect redirects to ZtrackCenter.)
|
|
|
|
Post by Rob Albritton on Feb 1, 2024 17:41:29 GMT -5
Delays are due to a Senior Management conference and bocci ball contest.
|
|
|
|
Post by Scott on Feb 1, 2024 17:46:19 GMT -5
Delays are due to a Senior Management conference and bocci ball contest. Bocci ball can be a great stress-reliever. Will the results be posted? If so, when please? |
|
|
|
Post by cwrr on Feb 1, 2024 18:08:30 GMT -5
Delays are due to a Senior Management conference and bocci ball contest. *facepalm* Ugh, your killing me, Smalls!  |
|
|
|
Post by sjl on Feb 2, 2024 8:52:30 GMT -5
Delays are due to a Senior Management conference and bocci ball contest. You see what he did there? I think there was a clue... |
|
[joking]
