Allegheny's Recent Activity
Allegheny liked Hunslet589's post in the thread GWR 111 "The Great Bear" and Surrounding Controversies.
In order to judge if something is a success or otherwise you need to be clear on the purpose for which it was built. To my mind, you have to remember that GJC was first and forward interested in boilers. This was the area that he first...Oct 26, 2021 at 4:05 PM
Allegheny liked Jimc's post in the thread GWR 111 "The Great Bear" and Surrounding Controversies.
Not convinced... [ATTACH]Oct 26, 2021 at 9:55 AM
Allegheny replied to the thread GWR 111 "The Great Bear" and Surrounding Controversies.
Should it have been rebuilt as a 2-8-2?:) Oops! Sorry - wrong thread.Oct 26, 2021 at 8:49 AM
Allegheny liked Jimc's post in the thread Current and Proposed New-Builds.
An uninformed guess is that it would be worth investigating marine engines to see if they found advantages from that sort of thing. With sustained use at a steady speed my suspicion is they would be the best case for valve timing interaction.Oct 23, 2021 at 8:43 AM
Allegheny liked 30854's post in the thread Current and Proposed New-Builds.
Ireland's loading gauge was only ever a wee bit more generous, side to side, but overall, comparable to the UK height wise. The only carriages ever built to take advantage of the width were the Park Royal laminated body stock (1950s). Loco...Oct 22, 2021 at 6:19 PM
Allegheny replied to the thread Current and Proposed New-Builds.
I remember reading elsewhere on this forum that the limitation of the four cylinder compound with inside LPs was the wide spacing of the inside connecting rods and limited space available for the main bearings. Hence the change to three cylinders...Oct 22, 2021 at 3:09 PM