"David" high-velocity anti-tank gun

[Tony Williams]

Originally Posted by rob love

Looking at the thread on BOCN that you linked to, I see there still exists an original round for this gun. I am not sure that we even have a round for it.

Could you imagine trying to identify something like that in the days before the internet?

There are some paper data files available on the dimensions of 20+mm calibre cartridge cases, the best known being one by Bob Hawkinson in the USA. Even that doesn't include this round though - too rare. So yes, I have to admit that the internet is marvellously useful to those of us with obscure hobbies!

Do your sources say anything about the muzzle velocity achieved with different weights and types of projectile?

[rob love]

I have nothing on them. I guess Doug Knight would be the guy to get a hold of. I am guessing he got his information from Archives Canada.

Not sure if we have any information in the museum's library. It's a different building than the one I work in, so I don't have much to do with that stuff.

Perhaps if somebody has Doug's booklet on the 2 pounder in Cdn service, they could relate what information is in there.

[Tony Williams]

Originally Posted by rob love

Perhaps if somebody has Doug's booklet on the 2 pounder in Cdn service, they could relate what information is in there.

I would be grateful if they could.

Can anyone help?

[Ed Storey]

$10.00Can plus postage will get anyone the book from Service Publications.

https://servicepub.com/product/the-2...nadian-service

[tankbarrell]

http://www.bookworldws.co.uk/pounder...ce-p-4094.html

Other booksellers are available! It's worth getting.

[Colin Alford]

Gents,

If you are interested in an in-depth read of war-time documents pertaining to this gun see this link:

http://heritage.canadiana.ca/view/oo...2/1613?r=0&s=1

There are 3 files pertaining to it's development and trials:

55/2100/P2 - Proj No 2 - 2 pr David H.V. Gun - starts at image 1613 (above link) and ends image 1896.

55/2100/P2/2 starts at image 1898 and ends at 2144.

55/2100/P2/3 starts at image 2149 and ends at 2294.

The documents in these files are placed in reverse chronological order so the reader may wish to start at image 1896, work backwards to 1613, skip to 2144, work backwards to 1898 etc.

Happy reading!

Colin

[rob love]

Holy smokes Colin....lots of information there.

[Tony Williams]

Originally Posted by tankbarrell

http://www.bookworldws.co.uk/pounder...ce-p-4094.html

Other booksellers are available! It's worth getting.

Thanks, that one has arrived, along with Roger Lucy's book Secret Weapons of the Canadian Army (which has rather more info).

[rob love]

I pulled the 2 pr off the golf course a week or two back, repaired both tires and gave it a quick coat of paint before it moves over to the main museum. I thought I would put some photos on here. I could not find the EX number. The carriage number does not match the documents Colin showed and I didn't spot a breech ring number. The number may well be on the breech end of the barrel, covered by the stuck breech block, so it will remain a mystery for now. Note it has the groove and keyway for the littlejohn attachment (I believe).

I had a look earlier in the week.....as can be seen it is raining now with possibly some snow flurries today, so the details did not come out that well.