land-speed
[Top] [All Lists]

Re: Topic....gear ratio

To: "Glenn Ridlen" <glennr7@hotmail.com>, <James.Tone@AES.com>,
Subject: Re: Topic....gear ratio
From: "Chris Harris" <yesford@clear.net.nz>
Date: Wed, 23 Feb 2005 10:08:53 +1300
High there Glen,

One way to help understand this deal is that horsepower is a function of 
torque.
The formula goes like this:

HP = Torque X RPM divided by 5252.

Put another way, where the torque and horsepower curves cross is always at 
5252 RPM.

Chris Harris.............NZed


> OK here is something I am fuzzy on. I know roughly what the torque and HP 
> curves of my motor look like. How do I use that info to choose a gear 
> ratio. I have been told that my motor is not going to pull beyond the max 
> torque. That makes sense to me since what one needs to overcime is the 
> resistance, primarily wind, which is a force. Torque is force so when the 
> two match, that is as fast as you are going to go. On the other hand I 
> have always heard that in drag racing torque is proportional to elapsed 
> time and speed is an indication of HP. So do I gear for max torque or 
> HP????
> 
> Glenn






<Prev in Thread] Current Thread [Next in Thread>