speedometer speed

[Vancevr]

I am rebuilding my speedometer on my car and was wondering is the speed in mph or kph or neither.

[Charles Levien]

I am rebuilding my speedometer on my car and was wondering is the speed in mph or kph or neither.

It really doesn’t matter — when you can’t hear anything above the wind you’re doing 60.
Comments will follow I’m sure.

[Dave Wortley]

For a ‘29 chummy the original speedo is a Smiths PA in mph.

[Howard Wright]

Hi All

Some export cars had a kph speedo.  At least my 1930 RK had when it was exported.

Cheers

Howard


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[Alan]

It’s easy to tell. If you are doing 80 it’s in kilometres.

[Bob Culver]

I recall as a small boy playmates being very impressed by the 80 mph speedo on my Dads RP!
Incidentally the speedo later proved conservative, reading lower than various "moderns" compared with, so I suspect the top speed on true level no wind of 50 mph was accurate. On a regular 60 mile trip I used to acheive point to point times favourably comparable with my father in his 1952 Hillman but keeping to 50 mph indicated.

[AustinWood]

A friend at University had a Hillman. Bendix brakes - SCARY!!

[Martin Prior]

My RP regularly clocks 85mph. This must be under-reading quite badly, as the 140,000 mile run into Hereford only takes about seven minutes, so I must actually be doing more that 1,200,000 mph.

[David Stepney]

My RP regularly clocks 85mph.  This must be under-reading quite badly, as the 140,000 mile run into Hereford only takes about seven minutes, so I must actually be doing more that 1,200,000 mph.

Or about 1/60th of the speed of light! Mind you, speedometer readings are all purely relative anyway.

Where's my coat........?

[Ivor Hawkins]

My Magmo speedometer gently swings between 35 and 45 mph most of the time but it feels close to the speed of light sometimes...