Electric vs. nitro, watts/horsepower.

[Serum]

if i recall correct, 1 hp is lifting 70 kg 1 meter high, 1 meter far in 1 second. now thanks to our metric distortion.. grab a calculator.. :P

[Nick]

I read that about 4-5 times but still didn't understand Serum. :D

Intresting thread, a good read, thanks.

[BrianG]

In simpler terms (maybe); horsepower is how fast you can lift 70kg up 1 meter high.

If you have 1HP, you can do it in 1 second.
If you have 2HP, you can lift 70kg up 1M in 1/2 second.
Or, if you have 2HP, you can lift 140kg up 1M in 1 second.
Or, if you have 2HP, you can lift 70kg up 2M in 1 second.

And so on.

Although, saying you have to move "up" seems to take gravity into consideration...

[JOHNNYMAXXIMA]

Does anyone know if XRC has dynoed CEN's 7.7 engine? I believe they (CEN)clame 5hp for that engine. That is a huge engine but still seems like a lot a power.

[BrianG]

Don't know, but any Nitro motor will put out that HP for a small rpm range. Above and below that range, the HP will be substantially less - especially at the low range where you need it most.

Originally Posted by JOHNNYMAXXIMA

Does anyone know if XRC has dynoed CEN's 7.7 engine? I believe they (CEN)clame 5hp for that engine. That is a huge engine but still seems like a lot a power.

If I remember correctly it was like 1.56 hp and .59oz. of torque. Definitely NOT 5hp.

[crazyjr]

Originally Posted by pb4ugo

Nothing theoretical about it (except some manufacturer's claims).
1hp=33000ft.lbs/min

The ability to do work over time.

Sorry, i wasn't clear on what i said. On 1 to 1 dyno's, the rpm and torque are the only things actualy measured, Hosepower is calcutated in the computer. The theoretical part comes in with how the car is setup, you can have a camaro that makes 300 hp on a dyno but with the proper setup can show more power at the track than it showed in the dyno room.

[squeeforever]

Originally Posted by crazyjr

Sorry, i wasn't clear on what i said. On 1 to 1 dyno's, the rpm and torque are the only things actualy measured, Hosepower is calcutated in the computer. The theoretical part comes in with how the car is setup, you can have a camaro that makes 300 hp on a dyno but with the proper setup can show more power at the track than it showed in the dyno room.

Such as airflow.

[coolhandcountry]

Originally Posted by crazyjr

Sorry, i wasn't clear on what i said. On 1 to 1 dyno's, the rpm and torque are the only things actualy measured, Hosepower is calcutated in the computer. The theoretical part comes in with how the car is setup, you can have a camaro that makes 300 hp on a dyno but with the proper setup can show more power at the track than it showed in the dyno room.

The dyno registers how long it takes to produce the rpm with a certain resistance.

[Serum]

I looked it up, 1 hp is moving a mass of 75kg 1 meter per second UP (1m/s is 3.6km/h is 2.25mph)

Not sure who originally said it.. I think it was Carol Shelby, but..

"Horsepower sells cars, torque wins races."

Bigger number, in a unit almost everyone has heard of, is going to sell more.

[crazyjr]

Originally Posted by Bolt_Crank

Not sure who originally said it.. I think it was Carol Shelby, but..

"Horsepower sells cars, torque wins races."

Bigger number, in a unit almost everyone has heard of, is going to sell more.

Jack Roush has been known to say that to