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PostPosted: Mon Sep 12, 2011 7:09 pm 
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Ahhh,.. Gotcha. You may wish to visit the "music on board" thread. :wink:
http://www.hobiecat.com/forums/viewtopic.php?f=71&t=37672&hilit=music

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PostPosted: Mon Sep 12, 2011 7:11 pm 
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Location: Vancouver Island, Canada
snjsanders

Would you please do yourself, and any others in this Community who own the Evolve or E2, a huge favor?

Send email as an owner to add a point that I consider crucial for the future development for this product.

It is as simple as heck to design a folding prop for their motors. This would allow you the least amount of drag without having to remove the motor (which in high winds can also add to your boat's stability as an extra keel down where it counts [sail drive concept])

I've tried to do all I can to make this happen. Even if it is offered as an option, at a reasonable price would be well worth it to get the best performance out of your boat.

Best Regards
Trinomite

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PostPosted: Mon Sep 12, 2011 7:26 pm 
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Location: Jupiter, Florida
Trinomite wrote:
It is as simple as heck to design a folding prop for their motors. This would allow you the least amount of drag without having to remove the motor (which in high winds can also add to your boat's stability as an extra keel down where it counts [sail drive concept])
Trinomite


I am definitely not an expert on folding props but by placing the aligning rod into the e2 motor you hide the blade behind the motor as well as keeping it from spinning. That should solve allot of the blade drag problem.

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PostPosted: Mon Sep 12, 2011 7:56 pm 
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No worries, you don't need to be an expert in Marine engineering to understand this idea:

http://www.flexofold.com/2-blade-racing-propeller/

The Engineers at Torqeedo are, and know exactly what this concept means.

Yes the model I`ve posted is used on large Racing offshore yachts, yet the concept remains the same. Bronze is not needed in this config. The ability of the Manufacturer to produce the same idea in plastic is more important. The more owners that demand this, the sooner it will happen.

Not the end of the world, friend, as I`m sure it will work either one way or the other. Yet after sailing for more than 30 years, I think I have a `fair`idea on how things work below the Water Line.

Thanks for your response, m8
Fred

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PostPosted: Mon Sep 12, 2011 8:25 pm 
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The idea of `hiding`the blade is a cheap compromise, imo.

The water flow around your drive causes a `Venturi`. That `speeded up`water flow hits the blades of the prop and even though they are not spinning, will cause loss of momentum due to drag.
There is a reason why a folding prop has been found to be the most efficient means to simply allow water to flow to your stern unencumbered...
It causes you the least amount of turbulence and drag.

However, if you are happy with your set up, pls disregard these posts.

Best Regards, and many best wishes for hours of fun on the waters

Fred

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PostPosted: Mon Sep 12, 2011 8:34 pm 
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[color=#40FF80]As for if the e2 motor is worth it, I would say it depends. For me I have found myself offshore 7 miles trying to get back against a 2-3 knot current and a headwind, one two many times. I normally fish alone and having the e2 motor in the fwd well combined with me pedaling the mirage drive in the rear is a no brainer. I also love the way the e2 motor is seamlessly integrated into TI. It stows easily in the fwd hatch and is takes less than a minute to put in place to use.[/quote[/color]]

Steve

Thanks for this information. I look forward to seeing the complete write up.

So far, have you faced any problems stowing the Mirage Drive or installing the motor while you are out in the water?


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PostPosted: Mon Sep 12, 2011 8:49 pm 
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Location: Vancouver Island, Canada
Funny how time resets itself.

I'm about to put a bid in for an Hobie 18 and 21.

Why?

Cause I can to get back to what made me an avid fan of Hobie products in the first place.

No bullsheit, just pure speed. If you feck up you snort sea water.

I still like that about the Hobies, they are not as forgiving as most would like to believe. You mess up, you pay!

Yah the AI/TI is prolly the least amount of concern you will have due to making this as user friendly as can be, yet these boats will not make you a better sailor. It will only make it seem to be that way....as long as the boat is fun, who cares!

Works for me. 8)

Be well
Fred

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PostPosted: Mon Sep 12, 2011 11:54 pm 
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Posts: 2416
Location: Escondido
snjsanders wrote:
Typically, I was running about 3 knots at ~130 watts. Once I have the chance to test it out under more ideal conditions I will do a complete writeup.
Here's some old info to use as reference. It will be interesting to compare the speed/power on the TI with the eVolve 2.

Image

Although the numbers won't necessarily match, I suspect the relationship between speed, power consumption and range will be very similar and should apply to any auxiliary power source. There are a couple of things that stand out:

1. There is a huge control over range with careful power management. Getting that extra 1/2 knot can come at a high price.

2. Easy pedaling along with your alternate power source can give a significant boost in speed or range, depending on what is needed most.

IMO, one of the best features about the eVolve is the information display on the throttle console. Using its built-in GPS, it provides speed (kts, kph or mph), power consumption, distance remaining and/or battery time remaining. This info is continually updated so changing weather conditions and tides are accounted for. This is great information to help you get back without running out of power or wasting time.

For what it's worth, I understand Hobie provided much of the technology relating to the propulsive efficiency, software development and materials improvement for the eVolve system. I don't know whether or how much of this carries over to the rest of the Torqeedo line. 8)


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