I found a Mogul that mechanically matches the Bachmann On30 Mogul if it were used as a locomotive in 55n3. The On30 mogul scaled down to a "modern" Baldwin narrow gauge mogul in 55n3 but the Baldwins didn't have 44" drivers. Brooks built the Colorado and Northwestern a mogul with the same mechanical dimensions with 44" drivers.
(http://www.55n3.org/image/mogul_match.jpg)
What is 55n3:
http://www.55n3.org/ (http://www.55n3.org/)
Harold
44" drivers would be plausible for a model of the East Broad Top's 2 "big" moguls, nos. 5 and 9. Number 9 was originally built for the Coeur d'Alene Railway and Navigation Co., and was successful enough to where the EBT ordered their 2nd #5 as a copy. Those moguls had 48" drivers--a bit larger than what these would scale out to, but it'd still be pretty darned close. (Besides, after a few shoppings, the driver diameter would be reduced due to re-turning the drivers on the wheel lathe. I have seen drivers that were reduced 4" from their original driver diameter.)
Later,
K
The On30 Mogul could be used many locos. The problem is finding plans or side photos. It is close to the EBT 2-6-2.
Harold
mink-
Kevin is right that the 44' drivers should work fine, although losing 4" on the wheel lathe sounds like a lot. Please note that many (most?) model drivers tend to be a little on the small side due to the conflicting needs for oversize flanges, which push the wheels apart, and keeping the overall wheelbase close to scale.
-- D
Could be made into a EBT Mogul with 48" drivers, HO 22mm are the right size.
(http://www.febt.org/Images/Events/2007re01c.jpg)
Brian Budeit's model of 2-6-0 2nd #5
Harold