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Sorry Nismoid I Wasn't Finished

The Dan

By The Dan,
in Engines & Forced Induction

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The Dan Grand Master

The Dan

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I just wanted to touch on that horsepower thing the other guy was talking about.....I was doing a little thinking about the horse, the rope and the weight etc. Does the weight of the rope enter into the equation and could the 1.8hp horse actually be using a lighter rope and therefore 'generous dyno'???

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The Dan Grand Master

The Dan

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What if you stuffed said rope down horses spark plug hole. Would that up the c/r enough to make one horse a two horsepower horse.

wtf Noel! The rope is going to reduce the cc capacity of the chamber, in turn, reducing it's volumetric gallop ratio

robincooper Enthusiast

robincooper

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I just wanted to touch on that horsepower thing the other guy was talking about.....I was doing a little thinking about the horse, the rope and the weight etc. Does the weight of the rope enter into the equation and could the 1.8hp horse actually be using a lighter rope and therefore 'generous dyno'???

Did you like the explanation of the history of the word boost. I thought it was pretty good.

As far as a generous dyno goes the weight of the rope is a constant. Dynos have to use the same grade rope. There will be some differences in the weight between the rope, the two main rope manufacturers of the day sourced their twine from different sides of the country, and there was some density difference, but this was so small that the weight difference is negligible compared to the weight of the mass.

That is not to say that generous dyno's didn't exist, because they did. When the horse did a "pull" on the dyno there was a person who had to count the revolutions of the sheave in a 30 second period if this guy got the count wrong by a rev or two that could put out the actual HP reading, Wetheringtons Horse Dyno Service was notorious for this as they used to employ the cheapest dyno operators who usually had trouble counting, giving a false reading.

Edited by robincooper
The Dan Grand Master

The Dan

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Did you like the explanation of the history of the word boost. I thought it was pretty good.

As far as a generous dyno goes the weight of the rope is a constant. Dynos have to use the same grade rope. There will be some differences in the weight between the rope, the two main rope manufacturers of the day sourced their twine from different sides of the country, and there was some density difference, but this was so small that the weight difference is negligible compared to the weight of the mass.

That is not to say that generous dyno's didn't exist, because they did. When the horse did a "pull" on the dyno there was a person who had to count the revolutions of the sheave in a 30 second period if this guy got the count wrong by a rev or two that could put out the actual HP reading, Wetheringtons Horse Dyno Service was notorious for this as they used to employ the cheapest dyno operators who usually had trouble counting, giving a false reading.

Were they located in Perth?

robincooper Enthusiast

robincooper

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Who? Wetheringtons? The first Wetheringtons was a mobile service that went around to all the goldfields in Victoria so the miners could have their horses dynoed before they bought/sold a horse. The guy who had the mobile service, Arthur Wetherington later set up a workshop in Bendigo which was a great success. The business model was then franchised out to different people and I believe for a short while there was a Wetheringtons franchise in Perth.

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