Series Land Rovers, Options
There were several types of freewheeling hubs fitted to Land Rovers through the fifties sixties and seventies. One of the most common was the Warn Lock-O-Matic freewheeling hubs.
- Product brochure. Four page brochure from November, 1969 showing various models, types, vehicles, and prices.
- Product brochure. An undated four page brochure from the early 1970's showing various models, types, vehicles, and prices.
- Warn Hub parts diagram and listing, page one, [Oct. 1960]
- Warn Hub parts diagram and listing, page two [Oct. 1960]
James Howard attempts a fuel mileage comparison with and without hubs locked up:
In order to fulfill an assignment in my Statistical Design of Experiments
class, I investigated this very point on my old Series III 88. I decided to
get fuel every day on my way to work, and randomly selected which days I
would lock the hubs for, and which days I would unlock them. I planned to
get 15 observations of each for a total of 30. Unfortunately we had a big
snowstorm one week which shut off access to work for 7 days, so I was only
able to get 13 locked and 10 unlocked measurements.
I got 13.7 +/- 0.8 Miles per US gallon with locked hubs, and 14.8 +/- 1.0
mpg for unlocked hubs. In other words, I could not tell the difference. My
notes for the next experiment (which I never got around to doing) stated
that if I wanted +/- 0.5 mpg resolution, I would need 74 observations, or a
more accurate way of measuring fuel consumption .
Making these measurements was a pain in the hiney. I had to start the Rover
in the morning, and drive 300 ft up the street to the Mobil station. I had
to use the same pump every time, so if someone else was there, I had to
wait. I then pumped a little less than 2 gallons into my tank, and
consulted my log to see whether to lock or unlock the hubs or not. Despite
using the same pump each time, there was a lot of variability in how full I
got the fuel tank each time. I then drove 11 miles to work, and then 11
miles back. I was not allowed to deviate from my route, which made it hard
to stop at the grocery store on the way home. After doing this for over a
month, I was sick of it.
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