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Modeller Build Logs

Ram OP

By Paul Roberts
Started: Oct 16, 2003
Updated: Apr 12, 2006

OK Here goes, my first BLOG. We'll all get to see how far I get and maybe it will encourage me to keep up my build pace.

As the title says, this will eventually be a Ram OP, which was the artillery observation post version of the Ram Cruiser tank. Over 80 of these were made in 1943 by Montreal Locomotive and they were built on the last version of the Ram Mk II chassis. This had all the mods introduced over the 2 year production run of the Ram tank.

While the gun tank versions of the Ram never saw combat service in that role, the OP was widely used by the self propelled artillery regiments attached to Canada's armoured divisions and army groups. With the removal of the main gun (a plain tube was welded on the outside to maintain appearances) and turret basket there was enough room inside for a crew of 6 which included the observers and operators for two No.19 radio sets. With the extra room and crew the OPs were highly prized by their regiments and further OPs were created on gun tank chassis at REME (RCEME?) depots in the UK. Like its cousin, the Sherman, the Ram was well suited to conversion to other uses and the OP was a perfect example of such a conversion.

Introduction Chapter 1 - Oh, the Choices, the Choices! Chapter 2 - Other Bits Needed... Chapter 3 - The Real Thing! Chapter 4 - The Hull Underway. Chapter 5 - Upper Hull Shape Chapter 6 - Lower Hull Chapter 7 - Turret Surgery Chapter 8 - Turret Surgery Chapter 9 - Differential Housing Detailing Chapter 10 - Hull Chapter 11 - Hull Stern Chapter 12 - Forward Hull Contours Chapter 13 - Back to the Drawing Board... Chapter 14 - Drawing Board Part 2 Chapter 15 - Hull Casting Chapter 17 - Hull Casting #2 Chapter 18 - Back in the saddle Chapter 19 - Turret Chapter 20 - Turrret sides - close up Chapter 21 - Ram Master Ready for Moulding
[Discussion]

Chapter 4 - The Hull Underway.Oct 21, 2003
Here is a closer shot of the hull. The plastic card around the rear of the hull is the start of work needed to widen the rear hull by .030" on each side.

The grey circle is the epoxy putty that I used to fillin the existing turret ring location prior to moving it back about 0.170". I'll also have to make a new engine deck from scratch to fit it in.

The lighter coloured area around the turret ring is where I had to mill the top of the hull down by about 0.050". A mill is a great thing for this work, let me tell you!

Finally the big blob at the left front is where I am filling in the auxilliary MG turret and will add the ball MG mount.

I'll add a chapter when I have more progress on the hull reshaping and you will be able to see what I mean about the hull profile radii being too small. It makes the corners too tight. The Ram definitely had a softer, more rounded look than the Resicast hull.


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