![]() |
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
|
#2
|
|||
|
|||
![]()
In article ,
"Kyle Boatright" wrote: "Alan Baker" wrote in message ... In article .com, wrote: A by-product of that lack of education is how Americans view 'horsepower,' typically insisting that 50hp (at 5000rpm) is EXACTLY THE SAME as 50hp (at 1000rpm). Indeed, most will whip out their calculator and 'prove' they are identical :-) But as the Wright brothers discovered more than a hundred years ago, horsepower is not a factor in the equation of flight. With powered flight, the factor we must concern ourselves with most is thrust. Working back through the equation, for a given propeller efficiency & rpm we will eventually arrive at a given quanta of torque which then may be converted into units of 'horsepower,' should we wish to do so, although it serves no useful purpose. But when we DO use 'horsepower' we must be careful to never use it in isolation, always identifing the rotational speed at which that 'horsepower' is being produced. Absolutely and utterly wrong. It is *torque* which must always be associated with the rotational speed at which it is being produced. -- Alan Baker Alan, You do understand that if you know the HP at a given rpm, you can easily calculate torque. KB Yes. But if you know torque without knowing RPM, you can't tell what performance you can get out of an engine, but if you know horsepower, you do know what performance you can get. -- Alan Baker Vancouver, British Columbia "If you raise the ceiling 4 feet, move the fireplace from that wall to that wall, you'll still only get the full stereophonic effect if you sit in the bottom of that cupboard." |
Thread Tools | |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Newbie Qs on stalls and spins | Ramapriya | Piloting | 72 | November 23rd 04 04:05 AM |
Homebuilt Aircraft Frequently Asked Questions (FAQ) | Ron Wanttaja | Home Built | 0 | October 2nd 03 03:07 AM |
automotive parts on airplane engines | Wallace Berry | Home Built | 15 | September 28th 03 02:55 AM |
Homebuilt Aircraft Frequently Asked Questions (FAQ) | Ron Wanttaja | Home Built | 4 | August 7th 03 05:12 AM |
Homebuilt Aircraft Frequently-Asked Questions (FAQ) | Ron Wanttaja | Home Built | 0 | July 4th 03 04:50 PM |