Quote from: jpstrainyard on May 16, 2010, 08:47:40 PM
JP of Acton MA USA writes,

Hi GTBob,

I have a Willaims FP45 loco, with 6 wheel trucks. The 2 outer-most and 2 center axles are flanged and driven by the motors. The 2 inner-most axles are equipped with non flanged, non geared plastic wheels. I do run O27 and O31 tracks, but don't run switches, just loops. My FP45 will easily navigate both radius curves, without derailing, but there is noticeable overhang, but nothing serious.

Sincerely: JP

JP----this is EXACTLY the info I was trying to gather.  Your comment has answered my question.  Thank you very much.

Regards,

GTBob

MB425---I don't have a 17" diesel loco to see if it will work OK on the 027 curve.  Needless to say, I don't want to buy one only to find out it don't work on the curve.

Joe S.--Will look forward to your calculations--Hopefully they'll help.

Much thanks to both of you for your input. 

Actually, I was hoping someone out there in model trainland had already tried running a 17" Williams diesel over two pieces of 027 curve and would be able to comment on how the loco performed.   Anyone??

Cheers,

GTB

I know a 17" loco (ex. Williams SD90, etc.) will not work on a Lionel o27 switch due to overhang of loco body hitting relay housing.  But, taking the switch out of the picture, will a SD90 navigate successfully on just o27 curved track???  I'm talking 2 pieces of curved o27 track making a 90 degree turn.  

Comments please..  Thanks..

GTBob