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Old 19-10-2016, 06:53   #1
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Rudder Drive: Superb Electric Drive Innovation - Hanse 315

Look at this Hanse 315 video! (A new propulsion system by Torqeedo)
My feeling while watching: "I want this!"
https://www.hanseyachts.com/de/boote...o-galerie.html

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Old 19-10-2016, 07:21   #2
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Re: Rudder Drive: Superb Electric Drive Innovation - Hanse 315

That is quite impressive,....good sales pitch.

Lets see if this link below will get you more directly to the video on just the 'rudder drive'


https://www.hanseyachts.com/de/boote...o-galerie.html
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Old 19-10-2016, 07:29   #3
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Re: Rudder Drive: Superb Electric Drive Innovation - Hanse 315

Youtube:
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Old 19-10-2016, 07:32   #4
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Re: Rudder Drive: Superb Electric Drive Innovation - Hanse 315

Should have known that it would appear on youtube very quickly,...thanks for the link.

Not quite enough power or range for my needs, but who knows whats coming with better and better battery stowage capabilities...
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Old 19-10-2016, 11:35   #5
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Re: Rudder Drive: Superb Electric Drive Innovation - Hanse 315

Power and range and other electric propulsion issues aside...

This should handle very similar a Gemini where the rudders and outboard/outdrive steer together. It does take a little getting used to but will give you nearly as much control as twin engines once you figure it out.

The trick to remember is when you are making way thru the water, the rudders control the turn. If you are moving slow the directional prop thrust controls the turn.
- Ie: if you are going forward at 4kts and put the rudder hard to port, you will start turning to port. If you put the motor in reverse, you will continue to turn hard to port until you slow enough that the prop thrust is greater than the steering effect of the rudder at which point the rotation of the boat will reverse even though the helm is left untouched. If you want to continue to rotate the boat in the same direction, you have to watch and when the rotation of the boat stops (rudder turning force and prop thrust turning force are balanced), you quickly put the helm hard over the opposite way.

Once you are used to it, it becomes natural but at first I would forget and while trying to make a tight turn to the right, I would start turning right only to turn back to the left by cranking the helm over too soon.
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Old 20-10-2016, 19:24   #6
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Re: Rudder Drive: Superb Electric Drive Innovation - Hanse 315

I think this is fantastic, if it is properly marketed and at a reasonable price I can see it becoming quite popular.

I would really love something like this in addition to my diesel main engine. Great for maneuvering, possibly better than a bow thruster in many situations, and also a completely redundant propulsion system.

It seems pretty simple in concept, though I am sure the details take some working out. Maintenance should be pretty simple, as long as the rear seal is Ok. No gearbox issues, no alignment issues, no saildrive boot issues.

I really hope it catches on, and I can see a market for this concept for bigger boats as an alternative to fitting a bowthruster.

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Old 21-10-2016, 06:05   #7
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Re: Rudder Drive: Superb Electric Drive Innovation - Hanse 315

I once had a Louisiane 37 catamaran powered with a 9.9 hi-thrust 4cy outboard engine. I could hook up lines between the rudder arms and he outboard when docking or close-in powering, so the engine steered with the helm. Really greatly improved maneuverability.
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