33' 2 bay offset hopper

Interior detailing on the sides and what heap shield / end panels do you want?

Poll ended at Thu Aug 06, 2015 7:44 pm

Very important
2
12%
Doesn't matter
4
24%
flat ends
3
18%
curved ends
1
6%
angled ends
2
12%
notched curved
2
12%
notched angled
3
18%
 
Total votes : 17

Re: 33' 2 bay offset hopper

Postby Tom Dempsey » Tue Jun 06, 2017 12:13 pm

You guys miss my point, which is, we should build all TT Scale axle sets to a standard, that is the problem with the FV wheelsets, the axle length was picked at random. This is why NEM and NMRA exist, the standards. You can't blame FV, the fellow who originally placed the custom order has admitted on this forum that he just picked a number that seemed right. I would have held FV off for an hour or so and looked up the standard. I'm sure there have been comments to FV and that may be why this manufacturer isn't making any more or responding to questions/requests. Just sayin'
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Re: 33' 2 bay offset hopper

Postby Tom Dempsey » Tue Jun 06, 2017 12:20 pm

The FV axles will work fine, just a little too loose. They weren't made to standard, that was admitted on this forum by the fellow who made the original order, so it's not FV's fault. We all need to think about NEM/NMRA standards when building stuff, interoperability is the reason they exist. I'm sure FV has received feedback about the axle not fitting trucks correctly, could be why they don't reply to questions about this product any more. If we're going to bearings Richard, bronze or delrin, not nylon, please.
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Re: 33' 2 bay offset hopper

Postby Zs12 » Wed Jun 07, 2017 4:35 pm

The shorter FVM axles are correct because the wheels are much thinner than per NEM! FVM wheels are 1.8 mm wide, NEM 311 in contrast says 2.4 mm (min.!) and NMRA S4.2 2.0 mm. I think, wheels with NMRA RP25 code 79 dimensions would be a good compromise. Isn't it? NEM 310 and 311 are taking the NMRA standards into account.
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Re: 33' 2 bay offset hopper

Postby j p » Thu Jun 08, 2017 3:51 am

Zs12 wrote:The shorter FVM axles are correct because the wheels are much thinner than per NEM! FVM wheels are 1.8 mm wide, NEM 311 in contrast says 2.4 mm (min.!) and NMRA S4.2 2.0 mm. I think, wheels with NMRA RP25 code 79 dimensions would be a good compromise. Isn't it? NEM 310 and 311 are taking the NMRA standards into account.


Correction:
NEM 311 says 2.3 mm min. and allows for 2.0 mm if the grooves in the frogs are built for it - to avoid sinking of the wheel on the frog.
(if I understand it correctly)
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Re: 33' 2 bay offset hopper

Postby AstroGoat760 » Sun Jun 11, 2017 2:29 am

What size screws should be used to attach the trucks to the hopper car frame?
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Re: 33' 2 bay offset hopper

Postby ctxmf74 » Mon Jun 12, 2017 1:01 am

"The shorter FVM axles are correct because the wheels are much thinner than per NEM!"

Axle length and wheel thickness are two separate issues. Axle length along with axle end shape affects the fit in the truck sideframes, wheel width mostly affects the way a wheel will operate thru a given turnout( along with visual appearance)....DaveB
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Re: 33' 2 bay offset hopper

Postby Zs12 » Fri Jun 16, 2017 6:40 am

ctxmf74 wrote:Axle length and wheel thickness are two separate issues.

Theoretically, but the standard width between the truck sideframes and thus the axle length are obviously off-scale because of the too wide NEM wheels.
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Re: 33' 2 bay offset hopper

Postby ctxmf74 » Sat Jun 17, 2017 1:33 pm

"the standard width between the truck sideframes and thus the axle length are obviously off-scale because of the too wide NEM wheels."

Toy train trucks usually deal with the too wide wheel issue by leaving off the prototype's bearing castings on the inside of the truck frames, so scale width wheels leave a wider gap between the wheels and the side frames. The axle length has to fit the truck design no matter how wide the wheels are so wider wheels would have a smaller wheel face/side frame gap than narrower wheels would have. Even the common scales like HO or N are not standardized on manufacturer's axle lengths and truck sideframe spacing, it would be a lot simpler for modelers if they were.....DaveB
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Re: TiTan TT Trucks

Postby Richard-B » Sat Jun 17, 2017 5:45 pm

All: The re-stock shipment from TiTan TT arrived... National B-1 and Andrews trucks have been packaged... and all current orders have been put into USPS.

That said; the modest back-stock of loose GCR 33" wheelsets has been exhausted... and more orders will require harvesting wheel sets from jewel-boxed GCR cars. The price increase reflects this.

There are a couple of directions we are following for an ongoing supply of 33" wheels on 18.5mm axles...
Stay tuned... but this could take time.
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Re: 33' 2 bay offset hopper

Postby TiTan downunder » Mon Jun 19, 2017 7:24 am

>> What size screws should be used to attach the trucks to the hopper car frame? <<

Sorry, but, I don't know if there is a screw that will fit. They were designed to use the push in pins supplied.

Being an old N scaler I figured the pins were the way to go, as it saved a lot of hassles trying to find screws to fit and the pin system has worked well for N scale for many decades.

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