How much BHP from a push bike.

dont know if you can convert watts to bhp, but i can generate 700 watts (not for that long!). For a 30 mins sustained i can put out 300 watts.

Measured with a power meter....
 
Adam W said:
dont know if you can convert watts to bhp, but i can generate 700 watts (not for that long!). For a 30 mins sustained i can put out 300 watts.

Measured with a power meter....
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740watts is 1hp, so you can nearly get 1 horsepower lol.

i never look at the watts thing on the bikes at the gym, will look next time.
 
This was using somones £1500 pound powertap hub on my race bike. The gym bikes are pretty inaccurate, the exercise bike in the gym reckons i can get 900 watts out. Not very likely!
 
IIRC I think nokinidea did this for a laugh on powerstations rollers. Havent got a clue what they got though.
 
A professional rider can generate more torque than an FZR1000 EXUP acording to an old issue of performance bike.

I would think that was at "at one point" during the test.
 
whatleytom said:
Right, me and a friend were thinking about this the other day.

Hypothetically, how many bhp/lb ft. of torque do you think it would be possible to generate on a push bike? on a rolling road.

i think a fit person would maybe generate 1 and a bit maybe two horsepower?

what to you guys think?
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Try playing tug of war with a horse and find out, after your face has been smacked into the mud.
 
So, ive just been down the gym, i went on the cross trainer, and although the measurement maxed out at 300 watts, i felt i was giving at least 450-500 watts. and about 150-200 sustained for about 15 mins. didnt try the bike but on the top level i think i could get at least 1 horsepower for a limited time.
 
Bear said:
IIRC I think nokinidea did this for a laugh on powerstations rollers. Havent got a clue what they got though.
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you are correct, I remember having this convo with them.

I believe they said the managed to get just over 1 bhp. But as others have said no idea on the accuracy of this,
 
whatleytom said:
yeh but who has actually measured the horses, plus given the right conditions people can go a lot faster than horses.
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James Watt.

Plus as he was very paranoid of his measurements and numbers being contradicted by rival scientists and his ideas ridiculed and never taking of, he grossly underestimated the power of the horses he was testing just in case a rival scientist came along with stronger horse to prove his machines/inventions 'inferior' to the horses (which people loved) Adam Hart Davies that me that.

good explanation here too:

Torque & Horsepower

The word horsepower as it relates to machines, was defined by James Watt, the inventor of the steam engine in about 1775. Watt learned that “a strong horse could lift a weight 150 pounds to a height of 220 feet in 1 minute”. Work is defined as moving weight over a distance.

So the amount of work the horse could do was 150 x 220 = 33,000 foot pounds. And it could do this in one minute, which is the rate at which it could do the work. Divide this figure by 60 (60 secs=1min.)— one horsepower is also expressed as 550 foot pounds in one second. These are just different ways of saying what’s actually the same thing.

Here is another way horsepower could be directly measured. Say you have a horse hitched to a plow. In the hitch is a spring scale. The horse pulls the plow one foot every second and you see 550 pounds on the scale. That would be one horsepower.

http://64.233.183.104/search?q=cach...or+of+bhp&hl=en&ct=clnk&cd=3&client=firefox-a
 
Torque is measured in lb/sq inch right, so maybe get a man and a horse together, couple each with a 1"x1" metal bar, then get them to push as hard as they can against a sensor ?

Or would that be rubbish :p :o
 
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