where do you enter the size of the thickness of the square?

"Philippe Vessaire" wrote in message
...
Morgans wrote:


"Philippe Vessaire" wrote

A square wood beam,
aera= a*a
diam=15*a

You find the power with this formula:
P=0.0532 * (diam/450)^5 * (rpm/1000)^3
with diam in mm
rpm in revolution / mn
or
diam=((P/0.0532) * 10^9 * 450^5 / rpm^3 ))^0.2
a=diam/15

If you want check 180hp @ 3800rpm
diam = 1026mm a = 68.4mm

Is the area in the formula the cross sectional area, side of the beam
area, surface area, or what? More information is needed, please.

the beam is diam*a*a.
for the exemple, a square 68 x 68 length 1026.

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Philippe Vessaire ҿӬ