Toroidal propellers: gas burn reduction potential?
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spring fever
Well-Known Member
Amazing read!!
InterMechanico
Well-Known Member
Hey does anyone want to go halfers on a sharrow prop for my boat??
InterMechanico
Well-Known Member
All kidding aside, the efficiency gains make it a very tempting upgrade. If only it was closer to 3k usd ....
Rain City
Crew Member
If they sold them for half of that, they'd easily sell 3x as many. And then they'd have more people hooked on the efficiency who won't buy anything else.
I actually just had a great idea. You could get a couple regular fishing buds to buy you one, in exchange for one season of free trips. Win win win.
These were talked about in a thread last year.
I will consider a set of these when they are readily available and there's some sort of local support (if that ever happens)
There's a handful of barriers for me to forking out a small fortune for these:
-If I'm spending 15k on a set I want to be sure I've got the fit right. Don't see how you could be that with the sharrow setup. I always trial a couple different prop setups with new power, otherwise how do you know it's the right fit?
- the only comparison test to be found online is with a underpowered 32' 14000lb cat with twin 300 yams. That thing is a dog. I suspect that comparison is setup by sharrow to showcase the best possible improvements. Would be nice to have some real reviews that aren't paid for by the manufacturer.. Maybe they've just started shipping these and that's the reason there aren't handful of YouTube vids with different boats done by guys that actually paid for the product.... I dono but makes me wonder.
-debris getting stuck in the loops. Don't know if this would be the case or not but we ain't in the gulf.
- I'd be worried they might be target for thieves.
If they were 30% more efficient in our application they would pay for themselves eventually. Would still take 2-3 years.
I think it would make more sense on a new build if it allows you to power a boat with a set of 150s instead of a set of 225s. On a big build it might let you comfortably stick with twins instead of triples. Now that's an interesting thought. Then you save immediately, pack less weight, and possibly see better fuel efficiency?
How about twin 300s with sharrows vs twin 425 conventional? Now that makes a bunch of sense if it works. Then your saving yourself coin off the bat. Interesting.
I will consider a set of these when they are readily available and there's some sort of local support (if that ever happens)
There's a handful of barriers for me to forking out a small fortune for these:
-If I'm spending 15k on a set I want to be sure I've got the fit right. Don't see how you could be that with the sharrow setup. I always trial a couple different prop setups with new power, otherwise how do you know it's the right fit?
- the only comparison test to be found online is with a underpowered 32' 14000lb cat with twin 300 yams. That thing is a dog. I suspect that comparison is setup by sharrow to showcase the best possible improvements. Would be nice to have some real reviews that aren't paid for by the manufacturer.. Maybe they've just started shipping these and that's the reason there aren't handful of YouTube vids with different boats done by guys that actually paid for the product.... I dono but makes me wonder.
-debris getting stuck in the loops. Don't know if this would be the case or not but we ain't in the gulf.
- I'd be worried they might be target for thieves.
If they were 30% more efficient in our application they would pay for themselves eventually. Would still take 2-3 years.
I think it would make more sense on a new build if it allows you to power a boat with a set of 150s instead of a set of 225s. On a big build it might let you comfortably stick with twins instead of triples. Now that's an interesting thought. Then you save immediately, pack less weight, and possibly see better fuel efficiency?
How about twin 300s with sharrows vs twin 425 conventional? Now that makes a bunch of sense if it works. Then your saving yourself coin off the bat. Interesting.
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Rain City
Crew Member
In my dreams, I planned on putting two 350 dual prop Suzukis on my podded Commander. The only reason for considering the dual prop was for the increased performance without having to jump way up in power. If these gave me 30% more efficiency I could potentially run twin merc 300s instead. It would be a game changer in that scenario. To basically reiterate what you just said.
gunnerlove
Well-Known Member
New technology becomes cheaper over time. And once patents expire there is usually a substantial dip.
Gear'n'beer!
Well-Known Member
I spoke with the director of sales with sharrow at IMTS. He threw out a number of $1500 for a prop for my boat.....15" 19p
That seems reasonable. Grossly different than what's posted.
ship happens
Well-Known Member
That seems like a fair price. Is it a rubex hub type?
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Gear'n'beer!
Well-Known Member
That’s a good question. I don’t recall if it was rubex
bryce
Crew Member
For that price I’d definitely give them a try
spring fever
Well-Known Member
Do you know if it is still 150 hp and up?? 1500 is much more reasonable than posted.
wolf
Well-Known Member
Thats a TON of money for a weeknd guy you would never see the savings compared to a $1,500 set up
This is an interesting development. Might have something to do with the huge price drop being reported.
www.boatingmag.com
For me the value is increased range. That's a hard thing to buy.
Sharrow Marine, Yamaha Marine Precision Propellers Announce Global Distribution and Manufacturing Supply Agreement | Boating Mag
Sharrow Propellers will be available for owners of Yamaha outboards as well as Yamaha powered boats. Learn how this new and efficient propeller design, distributed by Yamaha, may be of benefit to you.
www.boatingmag.com
For me the value is increased range. That's a hard thing to buy.
InterMechanico
Well-Known Member
I would definitely try it for 1500. SFBC special pricing!
tannerc
Well-Known Member
Agreed, I’m fuel efficient already but if I can increase range that dramatically, it’s worth an investment at the new rumoured price.This is an interesting development. Might have something to do with the huge price drop being reported.
Sharrow Marine, Yamaha Marine Precision Propellers Announce Global Distribution and Manufacturing Supply Agreement | Boating Mag
Sharrow Propellers will be available for owners of Yamaha outboards as well as Yamaha powered boats. Learn how this new and efficient propeller design, distributed by Yamaha, may be of benefit to you.
For me the value is increased range. That's a hard thing to buy.
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