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X section is 1/15 diameter ( length of bar), yes the spreadsheet does all the calc's in mm, told me to make a bar 1350x90mm.
The spreadsheet itself is copywrite so if you don't want to spend the $125.00 you'll have to decipher the formulae yourself
The 5 and 3 in that formulae are power of. It did not copy through properly when I posted it.
I got the program for the prop design and aircraft performance calculations, this wood bar dyno is more of a curio as I needed a load on the engine for when I start it so thought I may as well have a load that gives a calculated result.
Andrew
On 02/10/2010, at 2:27 AM, Ernest Christley <echristley@att.net> wrote:
Andrew Martin wrote:
Power in HP = 0.0532 (diameter/450)5 (RPM/1000)3
Can we assume that diameter is measured in mm?
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