Sharrow Props - Range & Efficiency
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- เผยแพร่เมื่อ 29 พ.ย. 2022
- BoatTEST has been reviewing the Sharrow props from the day they were introduced to the boating public, and over the years we have found that these props are more fuel efficient in the mid RPM range in every application we have tested.
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![ป่ะป๊าเลอา ชื่อ ??? [ดูคลิปเต็มหน้าช่อง] #Short | PANG ORNHIRA](http://i.ytimg.com/vi/ssxX0VkJCTo/mqdefault.jpg)
Don’t worry guys !
Once China clones one and mass produce them, we will all have one. 😂
Hunter's on his way over now. He'll just mention "nuclear sub tech" and they'll fire up their slave labor in no time.
For everybody crying on the price: It's a rather big and juicy chunk of stainless which probably runs at least half a day on a 5 axis CNC mill. For a 15" one 5k seems rather reasonable and if you don't bottom it out it gonna pay off rather quickly depending how much refueling is going on.
Also really nice and informative video you guys put out there. Much appreciated!
How would this prop do for pulling power, such as popping a couple of heavy slalom skiers out of the water?
@@deanbunnell4155 Since you have more "grip" then with a normal one it would do good i guess. I can't give you numbers but from my research, if i had any kind of boat with an engine i'd get one :| (this conment is not sponsored by the conpany making the props))
Nice invention and a whopping 179% fuel efficiency increase on a speed boat is huge but man, $5000 buys you a LOT of gas.
That price is just ridiculous.
I have a twin engine boat worth around $100k. $10k for two props is crazy money and over 10x the cost of a good stainless prop.
Maybe someday the technology will trickle down. I’d pay $1k per prop max.
I'm with you on the 1000 dollars , don't know how they justify 5K for a prop
Wow, a dramatic increase in efficiency! Now if they get the price under control, I think this will become the new standard? We’ll have to see???
I know two guys--right now, retrofitting for their boats. Their thinking is they will pay for themselves due to their heavy use.
Good test. I’d be curious to throw a 4 blade in the mix and see how they all perform.
The increased range is the "big deal" for boats. If your range is normally 200 miles and this prop instantly gives you 300 miles, that's a "game changer". Your other option is adding auxiliary tanks or bladders. $5000 starts looking more reasonable when you're factoring "range" into your POV.
I think $5000 is on the low end. I looked into these things it was closer to $7500 EACH so for my boat it was $15k.
@@uncommonsense9395 They're supposed to be so good maybe you can just use one. 😉
nothing about 5000 is reasonable for something that cant ever touch the bottom.
When you "don't know" how "air quotes" work. They aren't to "accent" a "word" in a "sentence"
@@SmashGhost he's that guy - th-cam.com/video/4DqoQq1zME8/w-d-xo.html
The results are great but those props cost nearly $5000 USD. $5K for a prop! You can buy a lot of fuel for $5K.
22:00 Something's wrong with the math. 23.8 MPH is not 66.9 KPH. Should be 38.3 KPH only.
If they could manufacture these at a vastly reduced cost, they’d be onto something. 5 grand for one prop is insanity. You’d have to spend caboodles of time on the water for this to finally be a financial gain.
I look forward to seeing a test of the Sharrow props on a mid size v hull cruiser or day boat with twin Bravo III, or similar counter rotating drives. Also interested to know how they might impact the performance/ functionality of boats equipped with joystick control systems.
New subscriber here! 😃👏🏻👏🏻👏🏻
I'd be great if Sharrow made props for ALL outboard motor HP ranges!
Curious to see if there's any improvement with sailboats and motorsailors, being small diesel engines. Also curious to see if they would work with a counter rotating dual prop lower units.
All props would benefit from this. The physics tells us.
Why wouldn't they work with counter-rotating props. I'm sure they make left and right hand wheels as they are and for more expensive vessels
i really liked these until i saw the price... you can buy a lot of gas for $5000
But that doesn't extend your range. This does.
If the 10% down they want when ordering was the full price, I would have bought one today!
@@jakeringer3153 exactly! That’s how much I thought they were originally and would have order immediately
@@Bubbles99718 you know what does extend your range? A fucking Jerry can!!!
@@charlieodom9107 lol
SaltWater Sportsman tested a World Cat 320DC with 4 POB and twin F300s. They recorded 24.2mph at 3500rpm with fuel burn of 1.49mpg - almost exactly what WorldCat lists for the 325DC with 2 POB, half tank of fuel and no gear (24.2mph at 1.5mpg).
Seems very odd that you recorded 1.1mpg in stock trim given the above.
Also your kph value for SWS II doesn't match the mph value, which doesn't encourage confidence in the accuracy of your figures.
What about a test on a displacement or semi-displacement hull like a fishing boat?
No who would own such a boat? SPEEEEEED is where its at
Doubt it would make much good with the slower rotation speed they generally got?
I see a lot of comments about the price being the biggest negative. The first VCR Top Loader were $12-1400.00 in the late 70's. That was for rich people not in my neighborhood. This is the marketing strategy of all things as they figure out how to better mass produce cutting costs the price usually starts dropping. Helps pay for the R&D. I need a surface prop 26+ or close to it which I don't see any of these on but the numbers sure look good. Might compare the slip factor of your current setup.
Ahoy
I would like to see if Sharrow prop technology can show same improvements for impellar applications (jet-drive).
They've been trying to get jet drive efficiency up for years and I don't see there being any way to implement this because the whole hoop of the propeller is there to make it act like a jet drives ducted housing
jets are just really bad on fuel any way you cut it... unless you are talking about huge planing ferries
I wonder if they make oars? Then I could go 16% further with each stroke
It sounds to me like you're good with your stroking right now
If it seems to good to be true it usually is. Seems to me if they were really that much better than every other conventional prop they'd be selling enough volume to be able to offer them at a reasonable price.
They've been designing and developing them for years, but mass production is just getting started.
@@TexanUSMC8089 It always amazes me how people that invent something want to make all their R&D money back on the first batch of customers instead of taking the no profit tax deduction until all the investors are paid off. I realize they have to eat too but they should just drive they’re clunkers until the majority of the bills are paid then when they start showing a profit then go out and buy their Escalade
Well these issues are explored in business math where there is several factors including risks of patent infringement litigation costs and impact on the market share saturates impacting company sales value ( liquidation versus transition to new product lines to maintain company value in light of levarage of manufacturing asset utilization )
.
I am sure somone else can say all this more expertly and I am aware of several other tactics used when it comes to manufacturing equipment assets .
Would like to see this test done on the Aquila 36 sport with the hydrofoil setup.
Will the same improvements be awable with semi displacement shaft drive hulls?
Great propellers horrible price, surprising they are still in business
😂😂😂
For the people driving a $100,000 boat I'm sure a $5,000 prop isn't a big deal. But I'm sure it is for those people in a little aluminum boat. The prop would be worth more then the boat!
I have a 100,000 dollar boat and I’m not spending 10,000 on props don’t care how efficient they are.
@@boatlover2296 Got to sit down and figure out how much you could save in fuel. Cost me close to $800 every time I fill the tank. I'll sit down and see how long it would take for the prop to pay for it's self. I go fishing often. personally I would rather buy a FLIR unit but who knows.
@@boatlover2296 I have a 500k boat and I wouldn't do it either. Makes more sense to run a 9.9hp high thrust kicker (or 25hp for current/wind) and trawl around at displacement speeds. You get like 7mpg with a kicker running displacement speed.
What is the fuel burn with standard props on the cat at the slower speed of the gimmick prop?
Any application here for large inboard motors (stern, V, and/or pod drive) on, say, 50 or 60 foot motor yachts? There is a market where the price would be far less of an issue and the added range would be well worth it.
How do these props affect bow or stern lift?
Brilliant & Amazing! Is it available thru your Agents in Australia or Papua New Guinea? Thank you for sharing this video. Greetings from Madang & Sepik Provinces, Papua New Guinea.
Cruise liners and container ships would love this! Massive fuel savings for them. Probably in housands of dollars per trip around the world.
Just said that on another comment, actually. I work on container ships, ferries, etc., and they'll usually burn several thousand gallons of diesel a day (now, some of that is going to power gen, but most goes to the propulsion still). If you provided these shipping companies with an option that would save them, say, a quarter of their fuel budget, they'd sell their left arm to get their hands on it.
Love to see a 60' POD drive sports cruiser get a pair.
I've been wondering about these props on the following
Counter-Rotating shafts
and
Large yachts say 70' and above?
How do you market a product to the general Public to be most profitable?
Not $5k for sure !
Cost 2X more then a 9.9 Honda kicker outboard.
Greg said in August 2020 that cast propellers would be delivered in early 2021, and that they're $2000 instead of the machined one at $5000. did that happen, or, change of plans?
I wonder how these would do on a long range trawler like a Nordhavn?
I would still like to see it compare it to a series of advanced alloy props. Test it against and Enertia Eco and a Revolution 4 for example.
I like the prop though and I still think it would beat them on some aspects.
Now try the test with a planing fin and the standard prop. I bet the gap narrows like crazy as its clearly just able to keep the bow down at planing speeds.
How do these handle prop strikes In sharrow water
Do they make props for my Cessna? Seems like getting on plane at a lower RPM is the biggest difference, just like getting in the air.
These are INSANE gains, wow!!
one more metric that is overlooked is that Sharrow propellers should be quieter. Im not sure if these new designs can scale up but the shipping industry is looking for quieter propellers to protect wildlife as ocean lanes get noisier. Some have resorted to drilling small holes at the tip of the propellers to reduce cavitation and noise.
Would this be good for inbound outboard ?
Something went wrong when calculating the KPH for the SWS II props, think it should read 38.1 kph
Yeah...Idk how they can justify that price. Most boats running them would likely be multiple engine setups so 10-30k just for props. Then I doubt anyone is qualified to work on them yet so tons of downtime waiting for factory repairs when that happens. I think a more realistic price would be around $1500. They're trying to recoup all of their R&D money in the first year it seems.
It's just like anything else, first couple years, the price is super high so they can recoup costs, pay back investors and lenders and contribute to more R&D. Wait 3-4 years and I'm betting that 4500-5000 price tag comes down, at least somewhat, into the 1500-1800 range.
What do you mean "realistic" price? They're selling them so fast they're struggling to pump 'em out.
That suggests their price is realistic... as in they can realistically sell them.
@@darthkek1953 ...or their production capacity is low
They seem to be mostly aiming right at commercial sport fishing captains at this point. These are the people most obviously likely to recoup the expense in a reasonable timeframe.
is there a Duo-Sharrow-Prop for Volvo Penta?
No props for an inboard out board leg with counter rotating screws?
What are these props like in high x dimension applications? I'd love to see a test with a high performance hull.
Basically the only people who would justify spending the exorbitant amount of money for one, yet they still haven't shown any data on them. Makes me think they perform terribly at higher speeds.
Any chance they make Sharrow props for 15-20hp Mercury/Tohatsu/Suzuki engines?
I was thinking about 3D printing replacement props for my peddled kayak. Gives me some ideas......
What is the cost difference in the props and how fast is the payback
Have any of these props been used on Electric motors?? To see how the Stats are.
Questions 4U guys .
What about performance Mercury 400 / 450 r for greater WOT .
And for stern drives pushing in excess of 850 hp .
Xcellent Test . Diligent & Concise
5k a piece!!!............ouch!!!
Question--their website says for engines 150 hp and up. I have a 115--are they saying they don't even recommend one for my boat?
I am still running Twin OX66 225 yammies. As everyone knows they are thirsty engines. Show me a test with that setup and you would get my money. Repowers are $40k and if these boost the efficiency of the older engines it's by far a better way to go dollar for dollar.
Yamaha F300s don't come with props. Too many different boats they go on, the end user or dealer puts the right prop on for the boat. Also you can change numbers with different props, conventional props. Tests like these are advertisements to wow people that don't know any better. I was surprised the difference of just different brands of props when I do prop testing.
Factory figures for the 325DC with F300s, 2POB, 1/2 tank of fuel and no gear are 24.2mph at 1.5mpg - which would substantially outperform the Sharrow props as tested.
Doesn't pass the sniff test.
Hmmm, I wonder if a prop like this would work in a trolling motor? I’m on that 90% of the time, so extending battery life is key - even if there was such a prop, it would be much cheaper than 3-lithium trolling motor batteries that will run well over 3k.
wow. running the engine under load the whole time at 25% less rpm is a whole other factor. so much easier on the engine over time. those engines are working their butts off if they're burning over 20 gallons per mile.
I still want to see how one of these custom would do on a long range trawler that’s meant for slower rpm and hull speeds… can it make an efficient long range trawler even more efficient?!
Geezus. Those Sharrow props really deliver fuel economy.
Are you telling me no significance in performance whilest at equal rpms? Aka both at 3k or both at 4k? I would assume the sharrow performs better in a mud bog or weeds as it appears weedless designed to shoot a stream through center while kicking the weeds away on outside bubble but i guess weed need high speed underwater filming even at a test facility aka bathtub water loop
Would this be advantageous for an irrigation well impeller?
Pumps use completely different impeller designs, most are centrifugal
Any idea when Sharrow will start manufacturing props for inboard cruisers?
I'm sorry we don't know this info yet.
And one of their original products was airplane propellers, I wonder why the idea was dropped besides certification issues.
@@vitordelima it wasn’t MIT picked up where he left off and is researching that currently
Why are they not sold as OEM if they are that much better? There has to be a disadvantage?
Running the engine at 1,000 fewer RPM also means lower maintenance costs. I'd like to see that factored into the equation.
I believe you already did a review of these props a few years ago...
yes and we will continue testing and showing different applications. We are champions of the prop because it works and it's the first time in 100+ years that the propeller has been finally re-designed. What is not to like?
@@BoatTEST The price
@@ATStone They didn't want to reply to that did they
Maybe I'm missing something but wouldn't you go slower and farther if you just ran the original props at 3000 rpm?
Well if this data is to be believed, then yes you are missing something: MPG takes en enormpous hit if you fall of plane, as can be seen in the diagrams.l This props greatest strength (again, according to this videos data) is to run at a lower rpm put still keep the boat on plane.
Here's an inverse question: If these are so helpful in marine propulsion,
Is there a comparable improved propeller for Wind Generators?
40 years ago I saw some research that the giant airplane propeller was the Worst option for wind mills, yet here we are.
what about on a 70 Yamaha
I really like the part where they explain the theory why this prop is more efficient
Simple physics really. Less cavitation on the downdraft skeg make for better fuel economy. Although the coasting speed is reduced since the thermal efficiency is reduced due to that same downdraft pitch around the skeg ring top plate. If you can smooth the skeg ring top plate it would result in a better top speed depending on the temperature of the water your running in.
@@askikr79 You sound like a new AI bot trying to write a comment. None of that made sense.
This technology interests me.
Merc or Yamaha needs to buy them out and price these props more mainstream
I’d like to see it on an arnison drive
The cost of that prop buys a lot of fuel, several years worth for me.
Wouldn’t the best test be running at the same rpm? I have Volvo DPH drives in back of D4 225 hp engines, my best cruising rpm is at 2800, I make 22 knots while burning 16 gum. That’s on a 16,500 # 32 foot boat.
If you really want to make a significant comparaison at least one of the variable has to be the constant, in this kind of test SPEED has to be the constant. Plus or minus 1000 rpm makes a big difference in consumption and a relatively small difference in term of speed. Else this is just infomercial!
Would sure make a huge difference on my 36ft displacement cat but can't justify the cost.
wait till you hit a rock with your $5,000 prop. and now with that beast on there you likely have a bent prop shaft too. so much for savings.
Hmmmm very interesting
Lots of variables here. It obviously comes down to how an owner uses their boat. I’ve looked at these but the cost doesn’t seem worth it to me. Maybe an offshore charter fishing boat would benefit in the long run but recreational boaters would require many years to recoup the cost of these things. Besides, if gas prices are a concern you shouldn’t buy a boat.
How about inboard diesel semi-displacement downeast/cruisers in at 30' loa?
If these were remotely worth the money you would see them everywhere.
Compare against a variable pitch prop
Interesting but certainly expensive enough for making a comparison on a familiar vessel and seeing if it's worth it. Surely the Sharrow people will let you try them out for a week or so for testing them before the purchase...
Might be cheaper to scan one and CNC it. What a rip...
Mercury Enertia ECO for best performance/price.
Are you guys comparing fuel efficiency when the Sharrow prop has the boat on the plane and the standard prop doesn’t?! That will give you a huge difference in fuel economy. It is impressive that the Sharrow prop gets the boat on the plane faster but gotta compare apples with apples. On the graph that explains the huge difference in fuel efficiency in the low to mid range RPM
They're interesting, but until they do some tests and show their impact on inboard (as they claim to have done) drives, I'm not really interested in outboards. What can it do for a Princess V50 or Flemming 65?
Whats the difference between an outboard and an inboard? Nothing of note really I think compared to its the drive system itself, of which inboard got a bunch availible... Shafts, outdrive, pod drive, surface drives etc... So in my estimation its better to specify that as the variable rather than inboard/outboard.
@@GoldenCroc It could be the prop's RPM with the outboard being higher than the inboard (of any type).
@@kfeltenberger They are generally about the same, for the same size and type of boat. Inboards use gearing just as outboards do.
Catamaran + hydrofoil + sharrow propeller= 60% fuel saving ?
order one now, get it in 3 or 4 years, maybe
A Sharrow add showed. I went to comment and learned comments weren't available. Hmmmm! As a machinist, I know this prop is way too expensive.
Yamaha or Mercury should buy this company, but perhaps they’re both just waiting for the patent to expire to design their own similar prop.
You made a mistake in your conversion 23.8 MPH ≠ 66.9 KPH it's so that is 38.3 KPH.
Fun fact, Sharrow can probably make some extra money suing MIT for copying its design for drones.
I want to see what these do on the new Mercury 600 big boy.
Throw some huge versions of these on container ships and cost of shipping will come way down
The economics of it are it's biggest advantage and it's biggest downfall, sure it saves fuel but it is also quite expensive. A parana prop might make better sense due to it having replaceable blades.
I don't see these going in a CAT like a MTI or Doug Right. For the price, you have to be on the water a lot to justify the price.
Even at idle, they see a 24% increase in efficiently? How is that even possible?
I am not sure but the gear is in forward and throttle in idle and check the speed the boat moves
The data is there and real. The efficiency is a win. HOWEVER, at $5000 per a prop... it's cheaper to just install a 9.9Hp kicker. The fuel savings of using that a lot (1gph at WOT and displacements speeds) will get you like 5-7mpg. That increase in mpg is equivalent to 100-300% improvement is fuel economy.
They need to set their price to no more than 50% more than a "normal" prop and they'd kill the entire boating prop industry as EVERYONE would buy it.
Paying $10,000 for two of these for my dual engine boat is just stupid. It's like buying a Rivian truck for $100k just so I can save money on fuel with a $35k truck... Actually it's a LOT worse...
Test at the same rpm to be fair.
They sell 5x more if they make it more reasonable! Max $2500 would be doable ! Hope someone else starts selling n that's when the price comes DOWN!