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Timeline for Loading exerted by propeller blade

Current License: CC BY-SA 4.0

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Dec 9 at 13:41 comment added floyd123 Hi all, thanks for your replies. The "loading" the paper refers too is the loading exerted by a blade on the air. It is essentially the pressure force, which is normal to the blade surface. The observer is in the propeller plane to the right of the propeller. The observer location matters because the R vector is defined from a blade element to the observer.
Dec 8 at 18:54 comment added sophit The paper is behind a paywall so I cannot access it. But as the title of the paper clearly states, it addresses the noise of a contra rotating propeller so that the term "loading" might be related to noise loading rather than aerodynamic loading.
Dec 8 at 18:29 comment added Ralph J Why does the location of the observer matter? Is the observer in-plane with the disc, or at some distance in front of or behind the plane of the spinning blades?
Dec 8 at 18:28 comment added John K If it's a turboprop propeller it's a bit simpler. If it's a piston engine, you end up with a myriad of loadings beyond aerodynamic and centrifugal, the power pulse and inertial reaction every 180 deg on a 4cyl engine, made more complex by resonant flex of the blades in response to those pulses. A metal prop is a big tuning fork. It's a mess.
Dec 8 at 15:38 history asked floyd123 CC BY-SA 4.0