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Her står det meste man trenger å vite om propeller som står i fri eller låses i revers:

https://www.yachtingmonthly.com/gear/folding-and-feathering-propeller-test-29807

Noe av det viktigste de konkluderer med er:

Sitat

What’s the difference between a bucket and a fixed, three-bladed propeller? Not much, if you want to slow your boat down by at least half a knot when you are sailing. That’s the conclusion of our fixed, folding and feathering propeller test – the most detailed ever conducted as far as we are aware. A fixed three-bladed prop, locked in gear, exerts as much drag as hanging a bucket over the stern.

Sitat

In the graph above, you can see that at 5 knots, a fixed three-blade prop with its shaft locked creates almost half as much drag as the entire hull. The drag can be halved by allowing the prop to spin, but the gearbox may suffer. By contrast, the drag of a feathering prop is negligible, and the drag of a folding prop is too small to plot on a graph of this scale.

Fysikken med faste propeller er egentlig logisk: En propell som "spinner med" vannstrømmen som passerer gir mindre motstand enn en som står fastlåst og lager en barriere for vannet som vil forbi.

Her står det meste man trenger å vite om propeller som står i fri eller låses i revers:

https://www.yachtingmonthly.com/gear/folding-and-feathering-propeller-test-29807

Noe av det viktigste de konkluderer med er:'

Sitat

What’s the difference between a bucket and a fixed, three-bladed propeller? Not much, if you want to slow your boat down by at least half a knot when you are sailing. That’s the conclusion of our fixed, folding and feathering propeller test – the most detailed ever conducted as far as we are aware. A fixed three-bladed prop, locked in gear, exerts as much drag as hanging a bucket over the stern.

Sitat

In the graph above, you can see that at 5 knots, a fixed three-blade prop with its shaft locked creates almost half as much drag as the entire hull. The drag can be halved by allowing the prop to spin, but the gearbox may suffer. By contrast, the drag of a feathering prop is negligible, and the drag of a folding prop is too small to plot on a graph of this scale.

Fysikken med faste propeller er egentlig logisk: En propell som "spinner med" vannstrømmen som passerer gir mindre motstand enn en som står fastlåst og lager en barriere for vannet som vil forbi.

Her står det meste man trenger å vite om propeller som står i fri eller låses i revers:

https://www.yachtingmonthly.com/gear/folding-and-feathering-propeller-test-29807

Noe av det viktigste de konkluderer med er:

Sitat

In the graph above, you can see that at 5 knots, a fixed three-blade prop with its shaft locked creates almost half as much drag as the entire hull. The drag can be halved by allowing the prop to spin, but the gearbox may suffer. By contrast, the drag of a feathering prop is negligible, and the drag of a folding prop is too small to plot on a graph of this scale.

Fysikken med faste propeller er egentlig logisk: En propell som "spinner med" vannstrømmen som passerer gir mindre motstand enn en som står fastlåst og lager en barriere for vannet som vil forbi.

Her står det meste man trenger å vite om propeller som står i fri eller låses i revers:

https://www.yachtingmonthly.com/gear/folding-and-feathering-propeller-test-29807

Noe av det viktigste de konkluderer med er:

Sitat

In the graph above, you can see that at 5 knots, a fixed three-blade prop with its shaft locked creates almost half as much drag as the entire hull. The drag can be halved by allowing the prop to spin, but the gearbox may suffer. By contrast, the drag of a feathering prop is negligible, and the drag of a folding prop is too small to plot on a graph of this scale.

Fysikken med faste propeller er egentlig logisk: En propell som "spinner med" vannstrømmen som passerer gir mindre motstand enn en som står fastlåst og lager en barriere for vannet.

Her står det meste man trenger å vite om propeller som står i fri eller låses i revers:

https://www.yachtingmonthly.com/gear/folding-and-feathering-propeller-test-29807

Noe av det viktigste de konkluderer med er:

Sitat

In the graph above, you can see that at 5 knots, a fixed three-blade prop with its shaft locked creates almost half as much drag as the entire hull. The drag can be halved by allowing the prop to spin, but the gearbox may suffer. By contrast, the drag of a feathering prop is negligible, and the drag of a folding prop is too small to plot on a graph of this scale.