Dunalastair (3.5 Gauge)

Overview
Dunalastair was an early 3.5 gauge locomotive first discussed in Model Engineer magazine in 1901. It is a 4-4-0 tender locomotive based upon John F. McIntosh's design for the Caledonian Railway; the 721 class.

Publication
The construction series for the Dunalastair locomotive by E L Pearce commenced in Model Engineer in 1901, volume 4, issue, 42, page 57.

Specifications
The 3.5 gauge model had a boiler pressure of 50 PSI in and an estimated tractive effort (at 80% full pressure) of 6 2/3 lbs, which made it unlikely to be able to pull passengers.