Henry Harris

Cosmoline is an American product used for preserving firearms and military components in the USA.

What is the official name of the thick/dark grease that was used for preserving stored British military components?

Some pics of the tank from yesterday. 

A couple of pre-digital pics when I first got it.

I have an early 1937 Matchless G3 that appears to have been used for some sort of military service.

Frame number 1501, Engine number 37/G3-2021.

Re-registered 3rd January 1946.

Is it possible to find the history of this machine?

Cornucopia Enterprises supply new G3 fork spindles......     http://www.cornucopia-enterprises.de/amcg80.html#Fork

1918 Dodge Model 30 for sale.......

https://www.gavinmcguire.co.uk/car-sales/details.asp?Category=Veteran-and-Edwardian-Cars&Make=Dodge-Brothers&Model=Model-30&StockID=13684

Admiralty threads are used in a few places on 1922/39 Austin 7hp cars. I suspect they were common on most Longbridge products into the '60's. Tracy tools are well regarded by the Austin 7 community. 

23 hours ago, SimonBrown said:

Well its looking like some enforced leisure time is coming...so...its time to think about dusting off the torpedo motor restoration.

I put things on hold for a while as life and work got in the way. Its quite reassuring to know I will have something to keep me busy if needed.

One nagging issue has been kicking around for a while. Some of the inlet manifold threads are fine, some are less so.

When undoing them some of the plating peeled off, and being nickel (I think its nickel) it galled up the threads badly, leaving some a bit rough you could say.

Here's what they should look like:

And here are what a few look like:

Sub-optimum, that one. 

The thread is 1 5/8" Whitworth fine - 20tpi. A rare thread if there was one. Finding a die nut has proved difficult - I set up an Ebay alert to see if anyone offered one for sale...not a sniff...there was/is one in Australia and I might just have to bite down and buy it if a local one cannot be sourced.

Tracy Tools in Torquay can supply "Admiralty" taps and dies up to 2" dia. HSS or carbon steel.  https://www.tracytools.com/taps-and-dies/whitform-taps-dies?page=5