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#51
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Propeller walk
"Marty" wrote in message news Charles Momsen wrote: 214/18 = 12. I did the calculation in radians and then forgot to divide inches by 12 then 5280, I did just 5280. Good work on checking the math errors, this is the 2nd one I've done here in recent times. At 18 mph the angle of attack argument begins to hold water. Freakin 'lecrical engineers, always thinking of omega. Cheers Martin They're even worse doing mechanical problems. |
#52
posted to alt.sailing.asa
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Propeller walk
"Marty" wrote in message news Wilbur Hubbard wrote: "Marty" wrote in message ... Edgar wrote: "Wilbur Hubbard" wrote in message anews.com... So you're talking about pitch of the prop as inches per revolution and not pitch as angle of the prop shaft? That's going off on a tangent as those talking about pitch angle in this thread are talking about the angle of the prop shaft from the horizontal or at least that's the impression I got. Wilbur Hubbard You are confused then. Propeller pitch is the distance a prop would screw itself forward in one revolution if there was no slip. I noticed from your earlier post that your 'bluewater yacht' has an outboard on the stern. ROFL I thought it odd also Edgar. Every mariner worth his salt knows that propeller pitch refers to the distance the prop would travel through the water under ideal conditions, usually expressed in inches per revolution, the use of degrees is only for academic purposes as the angle of the blade is not uniform from hub to tip in normal applications. Shaft angle should be rather self explanatory. Cheers Martin See definition 8 please: 2pitch vb 1 : to erect and fix firmly in place ~ a tent 2 : throw, fling 3 : to deliver a baseball to a batter 4 : to toss (as coins) toward a mark 5 : to set at a particular level ~ the voice low 6 : to fall headlong 7 : to have the front end (as of a ship) alternately plunge and rise 8 : to incline downward : slope Now I know you're being obtuse! Cheers Martin At least he's not "a-cute"! |
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