Canadian Built 3.7" Heavy Anti-Aircraft Gun

[Steve Guthrie]

Hi there

I've been studying photos of this gun as a preamble to building a model. Doug Knight's fine profile of the gun published recently by Service Publications has a number of useful shots but I also recently got access to a number of photos taken here at Canadian General Electric who built the carriages and did final assembly. There appears to be a number of variations of the mobile carriage, in particular the wheel arrangement. On the original British version, the two back wheels were hoisted clear of the ground using wheel and chain arrangement. It was then changed to a simple block and tackle device. Finally, it appears that the system was changed again and the back wheels were detached and rolled out of the way, like the front ones. This version also had a gun crutch added. Any ideas if these were Canadian changes only or did the British (and Australian) built guns have the same features.