The Sharrow Propeller™ EXPLAINED

think about inventions and what they've done to to the world and a lot of things come to mind light bulbs and and such and it changed the world and then we've got inventions that change Industries um you know microwave ovens and smart talks and uh we look at our propeller industry we've got the modern propeller invented in 1833 uh John patch in in the harbor in the yard Nova Scotia go Canada and it was a man propeller great by hand it was a prop shaft and he went across the harbor and started an industry that hasn't changed dramatically in almost a lot of years and we've got a new invention there's shower propeller and we've got the inventor here today to talk to us and we're the Leading Edge of of the industry the front front line if you will and I've got a lot to learn so it's my pleasure to say the difference and learn all about his invention and his company and his progress thanks [Applause] thank you for that introduction Brian and thank you all for having me uh when Brian called me and asked me if I would be interested in coming and speaking to all of you uh I immediately said yes and so it was important for me to have an opportunity to tell you a little bit about the background of a Cheryl Marine at uh at our technology and also give you a little bit of insight into how the propeller works and um and what it does differently than a standard prop so this was filmed at the University of Michigan's hydrodynamic facility and what you're about to see is uh one mid or it's one second of time that is slowed down to one minute and you're going to notice that there are very pronounced vortices in the standard propeller and you can see that there is virtually no tip vorticino standard tip vortices for the share of propeller another thing to pay attention to is these propellers are the exact same diameter they're the exact same pitch and they're the exact same blade area and they're both rotating at the exact same RPM and they're all going through the water at the exact same speed meters per second and you will notice that the Cheryl prop is bringing in more dye it is sucking in more fluid than the standard propeller normal propellers look at the water in front of the propeller our propellers look at the water in front of the propeller and we also look at the part of the water on the sides so as we're going through the water we're not just vacuuming in that the water from the front kicking out of the back we're sucking in everything like a black hole and then funneling everything through the back so you can clearly see the tip four to see on the standard Propel there's an arrow there and there is no traditional tip for to see with the Cheryl prop this leads to a dramatic reduction in sound like I said earlier people think that all the noise is coming from the outboard but a lot of it is coming from the tip vortices and the propeller itself and when people try our props for the first time one of the things that everybody remarks on is wow it's so quiet if we were on a boat together with one of our props and we were going 30 miles an hour I could talk to you like this and we could have a conversation without elevating our voice and that I think is one of the greatest benefits for the recreational industry it cause it makes it safer because you can hear what's going on and it reduces fatigue on the boat and I'm going to show you a clip of our props on a triple uh you know Contender triple Yamaha 300 on a contender 35 St going 40 miles an hour The Sound Reduction of our props is dramatic [Music] foreign it's actually the tip vortices [Music] so whenever we engage a customer they after they are done asking questions about how it was invented they want to know more about why it does what it does and what what is really different between a standard prop and ours we've talked about the tip or disease and tip or to see cavitation another attribute of our prop is it just doesn't slip like a standard prop because it has it holds that water in it doesn't let go of the water very easily the water ends up being kicked out the back and not slipping off the tips the way a standard prop would so we move about forward further with every rotation than a standard prop does with equivalent pitch we call our actual pitch our true Advance as a way to try to educate customers as to what the difference is between our props and standard props most people think that the props slip around 10 percent or somewhere in that range 10 to 15 the actual slip the difference between the pitch on the box and how how far forward that prop actually goes with a standard prop versus ours is uh is much more dramatic and we're going to show some some examples of that and how our prop helps with not slipping in the spot where people do operate their boats in the mid-range the standard propeller is slipping 61 58 73 we hit our maximum Advance rate as soon as we get up on out of out of the hole in our plane you can see that our Advance rate um hits for this particular situation around 81 percent of our pitch we're we're hitting that right out of the hole as soon as you're up I'm playing going 25 miles an hour and what that looks like in terms of a speed versus RPM graph is it's you can see here you ever notice we all talk about getting out of the hole this is a graphical representation of the hole this is what the red line that you see is what we see in every boat that we've that we've ever tested and we've tested hundreds and hundreds of boats at this point we see this all the time you're either on plane or you're not with a standard prop and if you're not on plane you're going around like up to 10 miles an hour and then you try to get out of the hole and then you finally get out of the hole and when you're out of the hole you're going around 4 000 RPMs you're going 30 35 miles an hour you have to maintain that in order to stay out of the hole otherwise you fall right back into it each one of our propellers has more than double the amount of vertical Force generated in standard propeller so if you have a triple rig you're it's like there's a piano worth of weight pushing up the stern of the boat so when our props push the boat out of the water instead of going Bow high and climbing out of the hole the whole boat just kind of raises up like it's on an elevator and you can see here represent represented every 500 RPMs getting another five miles an hour standard propeller between two 2500 RPMs and 3000 RPMs gained one mile an hour for this application uh we were asked to just show up with 17-inch pitch props that's it one set and put them on this boat and see what it could do with this fisherman to really test what our out of the box props could do that were not optimized we have a series we designed for Yamaha 22 different pitches and it's hot swappable with their saltwater Series 2 Series so Yamaha asked us to come out to Seattle and spend some time with somebody who they knew very well one of their Pro fishermen who was very happy with his vote and very very happy with the performance of the of the Yamaha propellers that he had and uh the goal of this experiment was to see if this guy has a some something that he considers to be a well-tuned rig that he uses you know you choose through ten thousand you know or twenty thousand dollars worth of fuel a year he fishes every day that he can he's fishing in three continents um and this is what we saw at his crew cruising condition we're saving him twenty percent in fuel at 30 miles an hour and at our if you compare our the miles per gallon here to RPM we're on top all the way up until 4 500 RPMs and then this is an example of what that means for him in terms of range and with with our props he's going to be going 71 miles further on a tank of gas um at a specific RPM and at 4 000 RPMs with our props where they start to line up in terms of C's versus RPM we're going to get to this station the same amount of time but with our props you can go 4 000 RPMs instead of 4 500 you can go 4 000 RPMs and he can get to his destination uh two hours and 58 minutes faster exact same RPM but because we're going so much faster he's going to get there a lot faster and save 30 of fuel while he's doing it so our customers are now the it's there's a learning experience when you get a share of property put it on a lot of people just automatically boom they go to 4 200 because that's where they drive their boat and they notice they're going a lot faster there but then they start to learn oh I can back down I can go 3 200 RPMs I can go 3 300 RPMs and go the same speed that I was going before at 4 000 RPMs so the ride is quieter smoother less vibration and saving 30 of fuel while we're doing it and this is an example of the propeller efficiency of our props versus the standard ones it took 4 500 RPMs to get this big heavy this is a big heavy boat and it took 4 500 RPMs to get them out of plane and up out of the hole we do that a thousand RPMs lower and then here's another example of Advance rate in inches where we see and these are the numbers you see again and again and again at 3 500 and 4 000 2500 3000 RPMs we see numbers like 56 195. and here again you see that belly you see that red line that that hole that that Tom Nelson has to climb out of every single time he's on that boat he has two operating conditions on plane or not we've created a new operating condition I call it second gear before you've got first gear and third you're on planar not now voters have a whole new operating range they can run their boats at 25 miles an hour in rough sea conditions with following seas and say I'm playing and track better the fact that we don't slip in addition to the fact that we don't have to vortices gives us unmatched efficiency greater range Superior fuel economy increased load capacities faster speeds sometimes we see very commonly 10 miles an hour which is double the amount of speed in the mid-range RPMs almost all the time we see like 50 60 80 90 110 faster doesn't matter what Hall it is if it's a 50-foot catamaran or a small little uh you know single outboard or a 65 foot yacht it we see this incredible ability for our technology to push a boat forward and not slip

Channel: Sharrow Marine

Views: 56,520

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Id: QNCbnntCU2k

Length: 11min 28sec (688 seconds)

Published: Tue Nov 29 2022