Accelleration

[esa5444]

Specialized to the point of uselessness...

I agree. These are cars that run on liquid high explosive, have an unacceptable high incidence of engines blowing up, and are able to sustain 8000 horsepower (or whatever) for roughly 3 seconds, after which they are able to sustain 0 horsepower until rebuilt. They might as well just strap a rocket on the back of these things.

An average human can produce maybe 1/6 to 1/5 of a horsepower indefinitely. But if you load someone up full of steroids and go-pills and make them run up stairs so hard that they literally die from the effort, you might get a human to put out 5 horsepower. The way I see it, if regular cars are the former, these drag racers are more of the latter. I mean I like noise and smoke as much as everyone else, but these cars are more entertainment than they are technical feats.

[Aglifter]

"550 foot-pounds per second" is still F/T, right? If so, you shouldn't need the steroids, or to push until your dead, but you will need a fairly big person, in good condition, to hit 5 h.p... Depends how long you want your 5(550 ft#/s) for...

[esa5444]

"550 foot-pounds per second" is still F/T, right? If so, you shouldn't need the steroids, or to push until your dead, but you will need a fairly big person, in good condition, to hit 5 h.p... Depends how long you want your 5(550 ft#/s) for...

Well, let's see. 250 lbs person. Running up stairs at a velocity s.t. he is ascending at 5 feet per second

Thats 250*5 = 1250 ft-lbs per second. That's what about 2 horsepower?

[blackeagle603]

I mean I like noise and smoke as much as everyone else, but these cars are more entertainment than they are technical feats.

Welllllll, there's probably value in the sense that HALT testing has value in breaking things fast and finding ultimate performance/failure points by exceeding operating stresses. I think that relates to Chris's earlier comments about it having benefits.

Correlating the heirarchy of failure from the accelerated failures back to the failures in actual operating environment can be tricky but still an interesting and often useful science project. At least in my area of work... YMMV.

[Aglifter]

Or, 450# 7.5' (ignoring body mass), in .5s - makes you a bad ass, but not a juicer... And, unless I did something really wrong, you produce a little over 12 hp.

To produce 5hp, at ~6' tall, I think you would only have to snatch ~183#, which is very easy.

[Aglifter]

100' was pretty common in strongman... A Gauntlet might end up 300' overall... I don't know if there was a single event that was 300'... Maybe some of the pulls, but those are, to an extent, about tricks. (They still suck, but compared to a 700# sled, a 26K# truck is cake, or impossible, depending on the surface - a slight grade, and physics means even a pick-up will just roll down the hill w. you tied to one end... Not that I would have ever been in such a position, screaming at a younger brother, busy laughing his ass off, to hit the &%( brakes, and what would happen to him once I get out of my harness...)

There was some crazy one which involved doing several laps w. farmer's walk implements.

Yokes were 800-1000#s, but I can't remember the usual times - normally about the same as a farmer's walk, I believe. The yoke number should be a bit more impressive - it was always easier, in a way, than farmer's walk. FW was all about trying to keep your hands closed, and avoiding destroying your knee in the turn, when they still made strongmen turn w. one - I believe they moved away from that - highly demanding, but not exciting to the audience.

[esa5444]

Or, 450# 7.5' (ignoring body mass), in .5s - makes you a bad ass, but not a juicer... And, unless I did something really wrong, you produce a little over 12 hp.

To produce 5hp, at ~6' tall, I think you would only have to snatch ~183#, which is very easy.

I will point out that in my original post I clearly defined an average person. Unless you are Samoan, 450 lbs and 7 foot 5 inches is a bit outside of average. By average I meant 5'8, 150 lbs, girly man or manly girl (depends how you average gender).

[Aglifter]

Matter of perspective - 6'4" and 320 was average among my friends and associates - 5'8" and 250, got you, affectionately, referred to as "runt" or "dang lightweight"

[Aglifter]

I was referring to a particular 240# freak I knew who was 6' and 240 who could clean and jerk that - there were a number of champion lifters in his family.

[Greg]

Or, 450# 7.5' (ignoring body mass), in .5s - makes you a bad ass, but not a juicer... And, unless I did something really wrong, you produce a little over 12 hp.

To produce 5hp, at ~6' tall, I think you would only have to snatch ~183#, which is very easy.

I will point out that in my original post I clearly defined an average person. Unless you are Samoan, 450 lbs and 7 foot 5 inches is a bit outside of average. By average I meant 5'8, 150 lbs, girly man or manly girl (depends how you average gender).

Actually he's talking about moving a 450lb weight 7.5 feet, PLUS his bodyweight. Standard strongman stuff.

Huh. What kind of friction are we talking here, because moving twice that on a pallet jack even up a slight incline, really isn't that hard. 'Man-who-sits-in-a-chair-for-a-living' me can and does do that (servers gotta get moved, they have a lifecycle you know) on a fairly regular basis.