~10 hp is needed to do 60 mph,and ~32 hp to do 100 mph

Now Rohan, show us your two points on any single curve on that chart! The numbers I am referring to and have always referred to are quoted from you:

"it is commonly quoted that ~10 hp is needed to do 60 mph,and ~32 hp to do 100 mph."

Use a french curve to honor the shapes of the example curves if you want. So where does the 10 hp land, eh Rohan? It does not fit the curves. No. So where do the numbers come from? Citation and basis for numbers?

But this is beside the point as you were trying to reconcile the: "it is commonly quoted that ~10 hp is needed to do 60 mph, and ~32 hp to do 100 mph." with the general equations for power to overcome aero drag which is adequately explained in the Phil Irving Tuning for Speed. Furthermore, Phil Irving points out the example numbers (manifested in the curve that Ken was so kind to post) to begin to calculate total power required factoring in aero drag power as well as such things as rolling resistance and maybe more.

The "commonly quoted that ~10 hp is needed to do 60 mph, and ~32 hp to do 100 mph" numbers are not the aero drag numbers; this had been a source of this confusion on the part of Rohan. That is why I suggested reading up on what Phil Irving , Tuning for Speed presented. The rest has been a Rohan subterfuge to save face.

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"it is commonly quoted that ~10 hp is needed to do 60 mph,and ~32 hp to do 100 mph."

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Postby Rohan » Sun Aug 28, 2016 9:25 pm
In case you folks didn't notice, we moved on and covered a fair bit of ground there.

So, shrapnel john, is 30 bhp for 100 mph correct, or not - yes or no ?

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"it is commonly quoted that ~10 hp is needed to do 60 mph,and ~32 hp to do 100 mph."

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acotrel said:

Better luck, next time. Rohan is not easily caught out. He is usually THEORETICALLY correct, so concentrate on his area of weakness - he has never DONE anything so has little experience of using a bike in anger.

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Rohan said:

freefly103 said:

110mph in third? Where's Rohan? ;-)

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My stock standard 850 with 22t sprocket (and no belt drive obviously) would nudge 100mph,
if you revved the zinger out of it in 3rd before clicking into 4th.

Thats what the mph chart in the manual says it will do, btw. (do note that 22t sprocket)

I wouldn't like to do that to it too often though, and the last few mph only come reluctantly.
The specs says the power drops away after the std cam gets beyond 6500, and I'd believe it...
If you waited long enough it might get to 100 - or leave engine bits all along the road...
Without even exceeding redline (7000).

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