The article caused open debate in the pages of the journal, mostly based on the perceived flaw of not utilising coupling rods.
22.
The original coupling rods differed from the usual in being three separate rods, thereby doing away with four knuckle joints and pins.
23.
The connecting and coupling rods were fitted with floating bronze bushes and were made of special chrome-nickel alloy steel of fluted section.
24.
The original coupling rods differed from the usual in the provision of three independent rods, thereby doing away with four knuckle joints and pins.
25.
New crank webs were fitted, which enabled solid bushed connecting and coupling rods to be fitted in place of the original split brass type.
26.
The connecting rods of the inside engine were not connected directly to the crank pins, but to projections on the coupling rods which actuated the rack gear.
27.
This carried a sliding crankpin journal for the centre axle, and bearings for the long coupling rods to the unevenly-spaced pairs of drivers ahead and behind.
28.
The coupling rod between those axles was'triangular', with an additional bearing mounted on its top edge, taking the thrust of the jackshaft drive rod.
29.
Note that this is the only suitable attachment point on any of the drive wheels that is not fouled by the passage of the coupling rod or the connecting rod.
30.
Some locomotives improved adhesion for heavier loads by coupling pairs of driving wheels, however there was a tendency for the wrought iron coupling rods to break especially at speed.
