Oct-04-2012 05:21 PM
Nov-14-2012 05:37 PM
Nov-14-2012 04:26 PM
DanTheRVMan wrote:Cloud Dancer wrote:
I probably know more about the horsepower formula than most people here.
HP= torque x rpm/5252
It is a very simple formula
exactly what is so difficult to understand :h
increase torque you increase HP
increase rpm you increase HP
Yet you continue to infer that only torque is important. :h
That makes no sense.
Nov-14-2012 04:13 PM
tres perros wrote:A Ford V10 chassis will pull your Jeep over the Rockies without a problem. You may not do it a 55+ MPH on the higher grades but you'll make it. The problem you'll run into with a modern gas chassis is the 5k lbs. tow limit. No safe way around it. If you think you will need to break thru the 5K limit then go with a diesel which will take you up to 10K lbs. Above 10K you’re looking at the Super C class.
Hello folks
I have been looking for a used class A leaning towards a diesel as I plan on towing a Jeep and travel west coast, rockies
Evidentially I am told that the newer V10 fords have very similar torque range ( a model change with an extra valve)
So Id love to hear some opinions regarding this, including if maintenance/warranty contracts are any cheaper...
Thanks ahead of time! This is a great forum and has been very helpful
Keith
Nov-14-2012 03:37 PM
Nov-14-2012 03:26 PM
Nov-14-2012 03:08 PM
Cloud Dancer wrote:
I probably know more about the horsepower formula than most people here.
Nov-14-2012 02:55 PM
Cloud Dancer wrote:427435 wrote:
Actually, Cloud Dancer, to calculate hp you need 3 things---------force, distance, and time.
Remember that even a small gas engine (10 hp?) can move a big load uphill if it has enough gear reduction------------it might take a day or two, but it will get uphill.
I forgive you. You don't know me.
I probably know more about the horsepower formula than most people here.
And, with all due respect, the little engine doing all that heavy lifting by using some serious gear reduction might be cute, but it's irrelevant.
I look for ways to assist a real person attempting to select a motorhome, and suitable engine for it,......first.
Then, I try to have fun with you guys.
I think the OP was satisfied some time back.
BTW I think people should read what Gale Banks has to say about WHY the bigger diesel engines have to "made for torque". He explains it better than we have time to do (or could).
Nov-14-2012 01:10 PM
427435 wrote:With 72 to 1 gear reduction, almost anything is possible. My old 900 lb, 8hp, tractor would pull 4000 pounds across level ground, and that is not rolling weight.
Actually, Cloud Dancer, to calculate hp you need 3 things---------force, distance, and time.
Remember that even a small gas engine (10 hp?) can move a big load uphill if it has enough gear reduction------------it might take a day or two, but it will get uphill.
Nov-14-2012 01:09 PM
427435 wrote:
Actually, Cloud Dancer, to calculate hp you need 3 things---------force, distance, and time.
Remember that even a small gas engine (10 hp?) can move a big load uphill if it has enough gear reduction------------it might take a day or two, but it will get uphill.
Nov-14-2012 12:56 PM
Nov-14-2012 10:34 AM
Cloud Dancer wrote:
It's silly to say that torque is not power. If you can say that torque can be a very powerful utility, is that OK? If I apply a cheater pipe to my wrench for the purpose of unscrewing a nut, is that not power? I know it's not horsepower(book definition), unless you use a horse that delivers 745 watts of power to turn the wrench, but it's power alright.
Horsepower is an invention which was inspired by an engine which was running, and was producing torque. Mr. Watt derived the horsepower formula, for several reasons, and it has become a standard in many applications,....including for advertising the power of enignes, by manufacturers.
IMO the confusion comes when we try to describe the torque which is produced by an engine that's running. Most people believe you have to take the torque AND the RPM, and inject it into the "textbook" horsepower formula in order to do the calculations that describe amount of work done, OR expected.
Yet, it can be shown that JUST the torque value of an engine, at any given RPM, can be used to calculate amount of work. All you have to do is know that work is equal to force multiplied by distance. Using the torque and rpm of the engine in your motorhome, you can calculate the propulsion force, and then solve for "work". You don't need the horsepower formula for this.
This shows me that just the torque produced by an engine is a power that can do a lot of work.
It's only when you need to do calculations with require horsepower as the standard, that you need to use the horsepower formula.
Personally, whenever I go to select a diesel engine for a motorhome, or earth-moving equipment, I don't even bother asking for the horsepower graph. All I want to see is the torque curve.
Nov-14-2012 09:39 AM
Nov-14-2012 08:51 AM
Tinyandthegang wrote:
Becauce horse power is a calculation of work being done, horse power determines how fast you can climb a hill and torque determines what gear you will need.
Nov-14-2012 08:05 AM
Nov-14-2012 07:28 AM