Nick,
herewith a description of the guns carried by the WWI Train Ferries:
"................Port For’d and Stab’d Aft guns
Vickers 3” 12pdr 12 cwt QF HA Mk Vlll
Stab’d for’d and Port Aft guns
Vickers 3” 12 Pdr 12 cwt QF Pl*
Though all four guns were the same, the difference was in the mounts, the Mk Vlll being for anti-aircraft work and the Pl* for surface work, the difference being in the angle of elevation, the Mk Vlll mount weighing 2.10 tons had an angle of elevation from -10° to +90°and the Pl* mount, weighting 1.233 tons, from -10° to + 30°.
The guns were first designed by Armstrongs in 1893 and put into service in 1894. They went through many modifications and were still in use during the WW2 on minor war vessels, minesweepers and trawlers.
Gun Weight: 0.6 tons
Gun Length: 123.6 ins
Bore Length: 120.0 ins
Rate of Fire: 15 rounds per minute
Muzzle velocity: 2235 ft/sec
Range @ 40° elevation: 11,750 yards with 12.9 lb High Explosive shell
AA Range @ 70° elevation: 19,000 feet
Elevation: Manually operated by wheel
Train: Manually operated by gun layer's body weight against a training bar in the case of the Mk.Vlll but the * against the PI mount, may indicate it was trained by wheel.
I don't think they were ever used in anger, and were only on board until the armistice when the three ships became Merchant Ships practically overnight!"
The above detailed description comes from an ex Merchant Seaman who has studied these vessels for many years and has a profound knowledge of them. He also plied the Harwich to Zeebrugge Ferry route from where he retrieved his library of information.
I was very fortunate to meet his acquaintance via my own build blog of Train Ferry No3, and it was just by chance that he looked-in.
He (Tony) has granted permission for me to publish this information on your web page and is available to give advice should you need it.
He also enclosed two images of the UNCOVERED guns, which I will attempt to upload later.
Isn't it a massive coincidence that TWO builds are concurrent of TF3, and both in 1:72 scale as well. Our build was originally going to be HMS DAFFODIL in 1944, but the WWI version was less fragile looking at the loading ramp area ...............
Kind regards,
Sandy. (Yarpie).