Horsepower to Weight Ratios

[novanutcase]

I was wondering if anyone can tell me how many pounds will 1 horsepower move and how that relates to the weight of our cars versus the horses we put under the hood!

Thanks!

John

[68sixspeed]

1hp= the work or power needed to lift 550 lbs vertically 1ft in one second. This was what was established years ago as the work one horse could do in a minute.

1hp can move almost anything, with enough gear ratio or reduction.-- if you've ever winched a car/truck you've moved it with only a few hp max. Now what happens when the winch isn't strong enough?- you use a snatch block to double the linear pull, but it takes twice the distance.

Correct me if I'm wrong, but I think what you are getting at is how much hp does it take to get to a given speed in a given distance? For that, the old Moroso slide charts is a great tool for what-ifs. I use to have the formula for doing it yourself handy, but I can't find it right now- perhaps someone else can post it, but basically it related hp to weight and a constant to achieve a given mph in the 1/4 mile.

Some homework-- http://www.edmunds.com/ownership/tec...5/article.html

[Damn True]

1 hp is also 746.7 watts (Watt was also the guy who came up with the term "horsepower" and the "watts" link)

also

1 hp is 2545 BTU

and

1 hp is 26.8 Million joules

and

[Fuelie Fan]

BTUs and joules are units of energy, not power. I think you also misplaced a decimal.

1hp = 2544.4 BTU/hr
1hp = 2.68 million joules/hr