Electric vs. nitro, watts/horsepower.

[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...