Thread size Odd ball-ium

[Petrol & Powder]

Lucas is the Prince of Darkness

The Lucas motto: Get home before dark

[BigEyeBob]

Model enginreers thread comes in 32tpi and 40tpi .I use it fairly often for fine adjustment thread spindles and the like .The thread in an English made micrometer is 40tpi .IIRC Parke Hale had thier own thread for thier cleaning rods and jags 37 1/2 threads per inch , they refused to change to the standard that the other companies used on thier rods and jags ,needless to say that PH products are not that popular these days.

Then there is the BA thread series.

[NoZombies]

I understand they drink their beer worm over there, seems Lucas made refrigerators also.

In the 70's they tried branching out and made a vacuum cleaner as well. Only thing Lucas ever made that didn't suck.

[uscra112]

I once counted six different thread standards on one brand new 1967 BSA. Or maybe it was seven.

[big bore 99]

As a retired tool and die maker,45yrs., I did a lot of prototypes many for the welding industries. You can do almost an unlimited combination of diameters and threads per inch.

[Petrol & Powder]

..........You can do almost an unlimited combination of diameters and threads per inch.

And the British have proven this,... repeatedly

[Herb in Pa]

Then there's the classic British car smell.....leather and burnt wiring...……..

[indian joe]

Some of the stupid english ideas had a reason behind them
When I was a kid our vehicle registration had a very hefty engine tax component that was figured by multiplying cylinder bore diameter x number of cylinders - that kept english makers (even jaguar) locked into smaller bore longer stroke motor design way past the time they knew better - a short stroke yankee engine of similar displacement could cost near twice as much to register -
none of which explains why they put these machines together inside out and back to front
old mechanic mate of mine (long gone) used to say it wasnt the foxes and rabbits the poms sent to Australia to annoy us - no mate it was austins and bedfords!

[Pressman]

Ask any P-51 engine mechanic about the trials of bolts and fasteners on the RR Merlin engines, and the way the English manuals were written explaining what fastener and wrench size to use.
It's no wonder Packard got involved in the manufacture of the engine and made it work.