It's made for 30-35 sec courses with sharp turns at both ends. Speeds are typically 60-65 mph @7000-7400 RPM, with 1:1 gear ratio, at the end of a...
It's made for 30-35 sec courses with sharp turns at both ends. Speeds are typically 60-65 mph @7000-7400 RPM with 1:1 gear ratio at the end of a...
The outboard world speed record is about 177mph with an Evinrude V8 on a Karelsen cabover hydro in 1989. The problem was to keep the boat on the...
Interesting. Except: (1) with through hub exhaust there is no exhaust deposit on the low pressure blade side, and (2) the thinner the blade the...
Every point on every blade of one side (take the high pressure side, e.g.), traces out the same helicoidal surface with pitch pp as the propeller...
Here are the only correct definitions of pitch and camber: In thin wing theory camber is specified on the mean camber surface, which generates...
I'll try to take a look when I find time, but I'm not interested in large angles of attack (stall).
Schaproder Bodden, Hiddensee.
With motor raised high enough on the transom that prop rake trims the boat; very little motor trim is now needed for 47.6 mph.
Lake LBJ, Texas. 47.6 mph @6450 RPM, prop is a much-modified OMC 13x22 Raker.
You obviously have no knowledge of mathematics, hydrodynamics, or propellers. In short, you have no idea what you think you're talking about. End...
To understand progressive pitch you don't need the curve, only the slope along the arc. We don't use curves from existing props so best fit is...
Gonzo, you need to visit a prop shop. No pitch gauge made today measures pitch, meaning pitch from LE to TE. They only measure pitch along a small...
I don't know where all the confusion comes from. What Wagner ref. do you mean? I add that I have no interest in unsteady flows at large attack...
-Prop shops hammer blades and cut blade area in the search for more speed or acceleration, or both. 'Or not' refers to measuring a blade straight...
Hydrodynamics is the continuum statement of Newton's second law. This is not like a model. Circulation is conserved. Circulation cannot end in...
We have found that outboard castings, including racing props, whether heated and beaten or not, generally do not have a systematic camber in the...
Wrong, high performance means good engineering at fixed horsepower, as in any APBA or UIM racing class. Or with a bass boat, e.g., with a motor of...
Supercavitating props are of no interest for high performance: the lift coefficient would be too low and the drag due to the cavity too high....
You clearly do not understand a helix or a helicoid. No curve has 'camber'. Why do you respond with total nonsense? Nothing better to do?