· Premium Member
If you're doing the Mt. Washington cog, there is no transition ... the equipment is all cog, all the time. Jeff Damerst at www.shawmutcarshops.com has built a few MWCR cog engines, generally wheel powered tenders pushing the loco model .... the cog in this case would be strictly decorative. A couple of traction tires on the tender and you might have enough to shove one car up a steep grade.... but I doubt you'd be modelling Jacob's ladder!