OK, first cab ride, was in the Cranford Yard 0-8-0 switch engine of the Central Railroad of New Jersey, summer of 1946. I was STUNNED, to say the least, at 4 years old!
Now; "favorite memories in the cab of a steam locomotive", the list is way too long, however here are two:
1) Cab of SP 4449, westbound out of Del Rio, Texas, on the New Orleans Worlds Fair Daylight return trip, when the large retaining pin that holds the engine to tender drawbars in place, fell out at about 45 MPH. The engine thus separated from the tender, the whole trailing train went into emergency, and hearing the lord bank, I looked out the small access window on the back wall of the all-weather cab, and watched the tender slowly disappear in the distance. My mind went into slow-motion, I looked forward, shout off the oil firing valve, looked back again and thought, "No way! That thing NEVER disappears like that!!!!", looked back forward, turned off the train-line steam supply, then all the noise stopped, as we just coasted along. Engineer McCormack, finally got her stopped by using the power reverse, and a small bit of throttle. We jumped off and put pieces of ballast under the wheels, while we surveyed the situation and made planes to "put her back together again".
It took us three hours and fifty minutes, and we were on the move again, and never delay any Souther Pacific trains. Not necessarily a "favorite memory", but one I will NEVER, EVER forget!
2) Cab of UP 844, westbound on the UP's Overland Route, just east of Cheyenne, and the beginning of Archer Hill. We encountered a red block, as the 10,000+ ton freight train ahead of us had stalled, due to one of their diesels off line from ground relay trips, & lock-out. After receiving permission from The Sidney Sub Dispatcher, we swung out the front coupler, and nosed up to the last car of the stalled freight. The FRED was removed, and we coupled into the stalled train. Using the radio, my Engineer instructed the Engineer on the stalled train, when to start pulling and releasing the train brakes, as we sat with 844 trying to push from the rear. Stalling a steam locomotive is no big deal, unlike a diesel unit, so we simply sat their, with steam in the cylinders, until the brakes began releasing, and ever so slowly 844 began to move forward, pushing in the slack, as the diesels on the front of the train began to move also. We finally got up to about 20 MPH, all the while at full throttle! Sadly, we had to stop before the summit of the grade, because the Engineer and Conductor of the freight were going dead on the hours of service law, and once the new crew was aboard, we had to start the whole train, again! Finally made about 15 MPH, until the summit was cleared, and we stopped again, in order to cut off 844 from the rear, re-install the freight's FRED, and we then headed on down the west side of Archer Hill, and into Cheyenne.