[EricJ2190]

Suction side or Forward side of the blade (the surface facing the bow).

[madtrade]

Slip is the difference between actual and theoretical travel of the propeller blades through water. A property matched propeller should move forward through the water at 80% to 90% of the theoretical pitch. [links]

[Goldstein]

Common for planning and combination hulls, Aft Rake provides increased top-end speed while assisting in trimming the bow upward for less wetted surface and drag. here

[suckless]

A right handed prop blade fits comfortably in the right hand with the right thumb on the blade. here

[HZPyR8eVk]

When moving forward, tends to push the stern to the left. more

[Bitpoulsy]

It is quite rare for a boat to come in hugging the left hand side as in the second illustration above. Once the initial turn has been made (1), backing down (2) pulls the stern to port achieving a better angle for an exit. It might take a few back and forths to get there but the end result (3) is quite easily attained.

[kpoirier]

Left-hand propellers are primarily used on twin engine boats to cancel the steering torque that results if both propellers spin in the same direction. Left handed propellers are sometimes used on lobster fishing boats where the wheelhouse is aft and starboard. Kicking to starboard while reversing makes docking easier for these boats. We have also seen left handed props on the occasional sailboat. more

[hatice23]

Any sharp turn is a challenge for our boat, particularly serious is a sharp turn to port. On an occasion where we wanted to get into a slip to port in a narrow channel with a current coming towards us, we opted for a 270 degree right turn again using her prop walk.

[Hiroe]

Those who say "you should never turn a prop forwards," will typically argue that: more

[CoinOfLuck]

One of aviation’s old wives’ tales is that you’ll wreck your vacuum pump if you move the prop backward. Fortunately, that’s not true. While most vacuum pumps are unidirectional—they either turn clockwise or counterclockwise in service based on the direction of rotation of the accessory shaft on the engine (and have CC or CW as a suffice to their model number)—it takes more than a few turns in the wrong direction to cause damage.

[links]

[mestar]

In any case, the issues of concern are primarily:

[ashley01]

The Australian Civil Aviation Safety Authority (CASA) states that: here

[Yahtee]

22.5 * 448 = 10kW, or approximately 13hp. more

[JonCage]

Now consider the opposite, that we move the prop control full forward. This has the effect of flattening the blades to a fine pitch. If we go far enough they form a slow rotating disc, with a lot of surface area exposed to the oncoming wind, creating lots of parasite drag. (just like the palm of your hand.) [links]

[robertsfran]

The answer is two-fold. A small amount of energy goes to parasitic drag losses in the propeller, but the vast bulk of it goes to the engine pumping and friction losses.

[GeorgeH]

Let’s take the engine out of the equation to simplify things. In fact, let’s take the prop out too, and consider a very elementary comparison – the old “hand out the window” example. here