The price of a certificated fixed pitch metal prop is staggering. However, as you do this, you should increase your RPMs by approximately 200 for each 1″ reduction in pitch (until the maximum RPM rating is reached). If you are interested in thrust, you will want the longest prop with less pitch. However, some factors can affect this rate of distance. The difference in takeoff performance is more dramatic when a constant-speed (variable pitch) prop is compared to a fixed-pitch prop. This is generated by making the propeller spin as fast as possible (not exceeding tip Mach), with a maximum blade pitch where the blade does not stall. To determine whether a prop is too long, you can easily compute the tip speed at maximum rpm. Recap: Increased Pitch = Speed Increased Prop length = Thrust. Add power and RPM rises until it hits the governor setting, then the governor starts to coarsen pitch to load up the engine, to keep the RPM at the setting. If you are interested in thrust, you will want the longest prop with less pitch. Larger diameter than standard if available too. A 14 x 21 prop would move 21 inches with each revolution, and so is doing more work – and moving faster – than the 19-pitch prop at the same RPM. If he lowers his pitch by two inches using the same 3 blade prop hell gain 300-400 RPMs which in theory should increae speed at the top end of WOT as well as help coming out of the hole a little quicker. What you gain there is sacrificed in top speed, though. At what point does the throttle control RPM on a constant speed prop?. A prop that has a low pitch will create more power. If he lowers his pitch by two inches using the same 3 blade prop hell gain 300-400 RPMs which in theory should increae speed at the top end of WOT as well as help coming out of the hole a little quicker. Getting too large will over heat the motor and may make it difficult to get sufficient pitch speed. Practical experience, and I have seen some published curves for specific props, indicate about square, that is 5x5 for pylon and 16x16 for f5B. The reason why is a lower pitch makes the engine reach maximum rpm at slower speed. The pitch of a prop is how many inches the plane will move forward per rotation. The extreme is a 5cm prop with blades at 90 degrees, in theory infinite pitch speed, but just stirs the air. If you need more speed, a higher pitch is the way to go. Lower pitch will cause your engine to reach maximum rpm at slower speeds. 21 Pitch Prop vs 19 Pitch Prop: A Complete Boat Prop Guide. If the size of the prop is limited, a 4-blade prop may allow for a more efficient pitch. If the size of the prop is limited, a 4-blade prop may allow for a more efficient pitch. It comes at a cost: top speed. A high pitch prop will move the plane forward even at low speeds, but the engine will have to work harder to get it going, so a lower pitch prop will give you better acceleration when starting out. A stainless steel prop will increase the speed of your boat. What pitch prop gives more speed? Essentially, the higher the pitch, the greater is the speed in a slower acceleration. The shorter the pitch, the faster we move forward (acceleration) and the engine can increase rpm more easily. Recap: Increased Pitch = Speed. Increasing prop pitch will make the boat go faster (provided the engine has enough power to keep the RPMs in the optimum operating range. 9 where D = diameter in inches R = engine rpm V t = propeller tip speed in feet per second For an 80-inch prop turning 2700 rpm, the tip speed is: V t = 80 x 2700 / 229. To see the potential impact on top speed, enter your current values for Max RPMs, Gear Ratio, Pitch and Prop Slip in the Boat Prop Calculator tool. A simple explanation of prop pitch indicates that a 21-pitch prop if turning in a thick substance, will push your boat forward 21 inches for every revolution of the blades. With a prop designed for high load/low speed, maybe an 11 pitch is OK because they will drive slippage to a relatively low number. The additional lift and speed supplied by the high pitch prop (when is not stalled) costs additional torque (HP) that the engine has to provide. The pitch is defined as the “theoretical distance” the prop will move through the water in one revolution, or turn. Larger diameter props offer the potential for higher speeds if the engine has the torque to push through the increased water resistance. Increased Prop length = Thrust. 38 is the speed in miles per hour. If you use a propeller with too high a pitch, though, the motor simply won’t have enough horsepower to turn it adequately, so the revolutions per minute will drop. As long as throttle is below the level that will speed the prop up above redline (or whatever the governor setting is), RPM will vary directly with throttle, like a fixed pitch prop engine. Apr 22, 2012. So a propeller of a given size will offer maximum thrust when its RPM gives a blade tip speed of around Mach 0. 7 prop because it is like using lower gears in a car. Outside of that range you’ll only find racing type hulls or tricked out motors. 7 prop would ultimately push more air which could be defined as more thrust. Here is the formula: V t = D x R / 229. Does decreasing prop pitch increase thrust??. Never ASSume that the dealer has provided the optimum prop. Cupped blades are usually considered to be 1 of pitch up on flat blades. Custom User Title. Lowering the pitch will increase rpm and vice versa. The relationship between power ( P) and speed and torque is P = T ω, so this means that for the same T we get more power out of the prop when it spins at a faster ω. A prop with too much pitch may deliver more top speed because the prop moves further forward with each rotation, but acceleration may be poor, and the boat will struggle to get on plane. the waters surface, progressive-pitch props are used in virtually all outboard applications. 9 where D = diameter in inches R = engine rpm V t = propeller tip. The pitch is the measurement that has a more direct impact on you. Best Propeller for Pontoon Boat 2021. Does not look like an issue with your numbers. Does YOUR Boat Have The Right Propeller?! (+ How To Check!). 19 Pitch Prop: Which Do You Need?. Conversely, a 19-pitch propeller would move your boat forward 19 inches. 5” pitch propeller our speed is 26 knots at 4000 rpm, with the 20” pitch prop, our speed was 28 knots while with the 21. The Perfect Pitch: A Guide to Choosing the Right Prop …. 17 Pitch prop VS 19 Pitch propwhich will troll slower>17 Pitch prop VS 19 Pitch propwhich will troll slower. On April 22, Gregory Santos threw the fastest and second-fastest pitches recorded by a White Sox pitcher, 102. Larger diameter props offer the potential for higher speeds if the engine has the torque to push through the increased water resistance. The diameter is dictated by the tip clearance to hull. At what point does the throttle control RPM on a constant. Which way does a propeller spin single engine?. A higher pitch will give you more top-end speed. Rob Manfred refuses to give Bryce Harper more time with pitch. The material of your pitch prop can also impact its performance. Composite boat props offer good performance, are durable, and inexpensive. A higher pitched prop allows the boat to move faster by travelling a farther distance with each rotation. A stainless steel prop will give your boat better fuel economy, performance, and is more durable than an aluminum prop. A lower-pitch prop is like low gear in a car or a bicycle—you’ll accelerate quickly but top speed will suffer. 8 prop will give more thrust and less top speed than a 10x4. Benefits of large props vs. Picking a low pitch prop, you can get more power and acceleration to enjoy with the Quicksilver. Knowing the theoretical speed for your boat can help you select the proper pitch. Conversely, a 19-pitch propeller would. Proper Propping: Getting the most from your boats performance>Proper Propping: Getting the most from your boats performance. the waters surface, progressive-pitch props are used in virtually all outboard applications. there are other prop people that know their stuff and can help you get the right wheel on your rig, and then tweak it to get it to the most efficient point. A lower-pitch prop is like low gear in a car or a bicycle—youll accelerate quickly, but top speed will suffer. Troubleshooting Tips for Boat Engine Propellers. Outside of that range you’ll only find racing type hulls or. Prop Calculator to Help Select the Right Pitch. For example: A propeller having a pitch of 65 inches will theoretically advance 65 inches in one revolution. For example, a 14 x 19 propeller has a diameter of 14 inches and a pitch of 19 inches. Fine pitch prop for a slow moving displacement hull. What pitch prop do I need for more speed?. They also promote more efficient fuel consumption. The acceleration gets slower and throttle. If your looking to gain top-end speed, or lower your RPMs, increase your pitch. A 14 x 21 prop would move 21 inches with each revolution, and so is doing more work – and moving faster – than the 19-pitch prop at the same RPM. Stainless steel doesn’t flex as much as other materials, so it will give greater control at top speeds. You stated your rpms were 5000 which is way to low in your picture you have a 17 pitch prop which is way too tall, on my benny with a 115 Yamaha I use a 13 pitch prop which give me 6000 max rpms. A lower pitch prop will give you lower speeds than a higher pitch prop when you cut the throttle. (Slip is 13 inches or a 20% loss of efficiency. Fine pitch prop for a slow moving displacement hull. Rob Manfred refuses to give Bryce Harper more time with pitch clock despite injury concerns. There’s a Science Behind More High. (See # 4 below) If your looking to improve your hole-shot, or increase your RPMs, decrease your pitch. Increasing prop pitch will make the boat go faster (provided the engine has enough power to keep the RPMs in the optimum operating range. Cruise speed was 10 to 15 kts slower with the climb prop depending on altitude; youd usually have to throttle back quite a lot to avoid exceeding redline RPM. Expect a good choice for your pontoon to be something not more than 15p (and likely lessmaybe like a 13 or 14, depending on the specific prop). Larger diameter props offer the potential for higher speeds if the engine has the torque to push through the increased water resistance. If your looking to gain top-end speed, or lower your RPMs, increase your pitch. For example, a 14 x 19 propeller has a diameter of 14 inches and a pitch of 19 inches. Conversely, you gain more speed with a higher pitch prop, but slower acceleration. Also if the boat has limited horsepower, a 4-blade can give you much needed blade area to give the boat more torque. How to Make Trolling Motor Faster: (Things You Never Knew). High pitch = higher top speed, but can’t accelerate well and provides less power. 5 inch of pitch. So a higher pitch allows for creating the same thrust at a lower tip speed, and thus gives higher efficiency. Depending on the recommended RPM of the engine and pick the right pitch for the boat. The price of a certificated fixed pitch metal prop is staggering. Water density and water motion can affect a. The pitch is the measurement that has a more direct impact on you. To use our boat prop calculator, you need four inputs: RPMs: Revolutions Per Minute. 5 one our speed is 30 knots at the same rpm. my fastest speed came with the 13 pitch prop. AeroComposites provides composite propellers for tractor and pusher configurations, sized from 68 to 80 inches in diameter for 160- to 600-hp engines, and. You could buy a new certificated metal propeller, but brace yourself for a shock. If you need more speed, a higher pitch is the way to go. 5” pitch propeller our speed is 26 knots at 4000 rpm, with the 20” pitch prop, our speed was 28 knots while with the 21. Most bass boats run a 25 or 26 pitch prop. If he lowers his pitch by two inches using the same 3 blade prop hell gain 300-400 RPMs which in theory should increae speed at the top end of WOT as well as help coming out of the hole a little quicker. So there must be a pitch/diameter ratio which gives good/best efficiency. On takeoff, you want max thrust/power. Because of the reduced pitch, the engine can reach its maximum rpm at reduced speeds. Most bass boats run a 25 or 26 pitch prop. A lower pitch will give you a better hole shot. Some that carry really heavy loads or extremely large. Itll cause the engine to turn more per minute (have more RPMs). Every inch of movement is actually equivalent to 200 RPM. Each rotation of a high pitcher prop will cover more distance. The extreme is a 5cm prop with blades at 90 degrees, in theory infinite pitch speed, but just stirs the air. A high pitch prop will move the plane forward even at low speeds, but the engine will have to. Engine RPM A secondary effect is that a prop which is spinning more slowly typically leads to a more efficient engine, and reduces wear. On April 22, Gregory Santos threw the fastest and second-fastest pitches recorded by a White Sox pitcher, 102. For the kerosene burners three-, four-, five- and six-blade props are available in sizes from 76 to 142 inches for engines with over 2000 horsepower. For example, if your outboard. Lowering the pitch will increase rpm and vice versa. Low pitch = better acceleration and power at low speeds, but can’t achieve a higher top speed. The trick is to choose a boat propeller that delivers acceptable acceleration and top speed. Boat Propeller Calculator. so what i am asking is prop pitch greater than prop speed. Proper Propping: Getting the most from your boats …. Now, imagine the equivalent distance (19 inches per turn of the prop) at 6,000 RPMs! That’s slicing through the water!. Also if the boat has limited horsepower, a 4-blade can give you much needed blade area to give the boat more torque. For example, a 21-pitch prop would move forward 21 in one revolution. For example, going from a 23-pitch to a 21-pitch propeller will increase engine rpm by about 400 revolutions. A lower-pitch prop is like low gear in a car or a bicycle—youll accelerate quickly, but top speed will suffer. Increasing either of these will put strain on the motor. If the engine doesn’t have enough power to run a higher pitch prop, performance suffers across the board and you could easily damage your engine. A simple explanation of prop pitch indicates that a 21-pitch prop if turning in a thick substance, will push your boat forward 21 inches for every revolution of the blades. A higher pitched prop allows the boat to move faster by travelling a farther distance with each. Most bass boats run a 25 or 26 pitch prop. Maximum thrust is needed especially for takeoff and for maximum speed. It will mean the engine revs higher for the same speed through the water but to get the full power you need to get to full revs. Boating professionals such as Overtons or Dunnrite Propellers recommend matching your propeller diameter closely to the rated RPM of the engine. mazco is known for their ability to blueprint a prop that will get every bit of speed out of your particular hull. The lower the propeller pitch, the better your “hole-shot”, or ability to get up to speed very quickly from a standstill. But, if in reality, it only moves forward 52 inches in one revolution, its effective pitch would then be 52 inches and the propeller efficiency would be only 80%. What pitch prop gives more speed? Essentially, the higher the pitch, the greater is the speed in a slower acceleration. A higher pitch prop gives more speed off the prop therefore more speed for the plane. will reducing prop pitch always lower top end speed?. You could buy a new certificated metal propeller, but brace yourself for a shock. However, this improved acceleration comes at a price: top speed. Mine swore they water tested 3 props and picked the best. *1056 = 12 (inches per foot) x 5280 (feet per mile). Also, we get about the same speed as you with our 2080 RL and 90 HP (2004 F90 4-cycle). On the other hand, a lower-pitched prop creates more power, but the boat will drive slower. A stainless steel prop will increase the speed of your boat with faster acceleration (about 2 to 3 knots more). So, yes the 17 version will be a slower prop for your boat. A lower-pitch prop is like low gear in a car or a bicycle—youll accelerate quickly, but top speed will suffer. This will make the boat move slower. Pro tip: Remember that each inch of pitch is equivalent to about 200 rpm. Re: Prop Size and Pitch Effect. When choosing the right pitch prop, its important to find a balance between the number of blades and the pitch. Selecting the Yamaha Propeller That’s Best for You. For example: A propeller having a pitch of 65 inches will theoretically advance 65 inches in one revolution. The Fixed Pitch Propeller Dilemma. A prop that has a low pitch will create more power. A 14 x 21 prop would move 21 inches with each revolution, and so is doing more work – and moving faster – than the 19-pitch prop at the same RPM. Performance between Low Pitch Props vs High Pitched Props. The number designated on a progressive-pitch prop represents the. The Disadvantages of a Stainless Steel Propeller The price is the biggest disadvantage. Larger diameter propellers are somewhat more efficient in take-off and climb. Pitch is the distance the boat will travel after the prop finishes one revolution. A larger diameter could keep RPMs down if the engine does not have enough torque to spin the larger diameter prop, as it will need more power to spin the same due to more drag caused by the extra weight of the prop and the larger blade area. The extreme is a 5cm prop with blades at 90 degrees, in theory infinite pitch speed, but just stirs the air. Propellers get more effective the faster they spin. 2 days ago · This is part of the new pace of play rules that MLB is implementing to speed up the game. Why does a low pitch propeller have better acceleration/take. What Pitch Prop Gives More Speed? The lower the pitch of the prop, the better the holeshot. Keep in mind this may compromise your hole-shot. 115HP Yamaha SHO Prop Pitch?. The number of major league pitches clocked at 100 mph and faster more than tripled over three years, from 1,056 in 2019 to 3,348 last year. But in reality, your boat is too. The change in propeller pitch significantly affects time to plane, acceleration, cruising speed, slip, fuel consumption and of engine rpm. The pitch of a prop is how many inches the plane will move forward per rotation. So if you are going to be changing the propeller on your recreational boat and decide to go from a 21 pitch prop to a 19 pitch. Once you have the RPM, you can calculate speed using the following formula: Multiply the RPM by the propeller pitch (e. Increased airspeed causes reduction of blade AoA at constant pitch. If the engine doesn’t have enough power to run a higher pitch. More power means a higher climb rate. The higher the pitch, the higher the gear of the prop. 38 is the speed in miles per hour. less pitch = higher cruise rpms ,higher initiall take off rpms ,higher loads on thrust bearings on dd engines to name a few 2. Which gives more thrust? More pitch, less speed, or more speed, …. Waterthunder Well-known member. Every inch of pitch usually changes the engine’s speed 150 – 200 rpm, so full throttle rpm should increase when using a lower pitch prop (of the same style). This is significant in the boating world as it will provide better mpg. The lower the pitch, the better the holeshot. What other advantage(s) does an adjustable prop give you?. A lower pitched propeller will create more power due to more engine RPMs, but the boat will move slower. Apart from a little less slip and a little more power it takes from the engine to turn it, the difference of 17 or 18 will not give you any more speed. On an airplane with a constant speed prop, the prop lever typically controls the RPM (pitch) of prop, and the throttle controls the power, measured as Manifold Pressure (MP). What Pitch Prop Gives More SpeedA simple explanation of prop pitch indicates that a 21-pitch prop if turning in a thick substance, will push your boat forward 21 inches for every revolution of the blades. Depending on the recommended RPM of the engine and pick the right pitch for the boat. The lower the propeller pitch, the better your hole-shot, or ability to get up to speed very quickly from a standstill. Propeller question: what do you go for? Bigger prop or. The propeller rpm multiplied by the propeller pitch indicates the distance forward a boat will move forward every minute. It’ll cause the engine to turn more per minute (have more RPMs). Choosing the Right Size Propellers 101. In the event you damage a stainless steel propeller, you will be able to get it repaired for between $125 to $200. A lower pitch prop will give you lower speeds than a higher pitch prop when you cut the throttle. 7 prop because it is like using lower gears in a car. On the other hand, a lower-pitched prop creates more power, but the boat will drive slower. 5” one our speed is 30 knots at the same rpm. Ecalc doesnt take that into consideration but tph plane manufacturer does. In the ninth inning, he was unable to get the brace on and had to run the bases without it. How Prop Pitch Affects a Motor Propeller pitchdetermines how far in inches the prop will travel through water for each revolution. A lower pitched propeller will create more power due to more engine RPMs, but the boat will move slower. May 3, 2023; Los Angeles, California, USA; Philadelphia Phillies designated hitter Bryce Harper (3. Rob Manfred refuses to give Bryce Harper more time with pitch clock. The pitch of the prop determines the speed of the boat at any given rpm, diameter will not change that. This is called over-propping, which overloads the engine, causing excessive wear. Picking the Perfect Pontoon Boat Propeller. However, I can see that a higher pitch 10x4. Cupped boat props allow most boats to achieve a higher top-end speed or at least the same speed at a lower engine RPM. Here they are: 1. The rate continues to go up this season, as shown by. prop comparison, looking for thoughts. expensive way to go, but there are many that go that route. The limiting factor is the speed of the blade tip, which must remain subsonic. With a prop designed for high load/low speed, maybe an 11 pitch is OK because they will drive slippage to a relatively low number. However, I can see that a higher pitch 10x4. Fine pitch prop for a slow moving displacement hull. The cruise speed at 4000 rpm increases by 2 knots per each 1. A prop’s up and down rotational motion, aka pitch, pertains to how far through the water it moves in a revolution. Cupped boat props allow most boats to achieve a higher top-end speed or at least the same speed at a lower engine RPM. Trying different props is a good idea because you never know how your ESC-motor combo is going to react to different props. 24mph, so no it will not get you to your desired trolling speed. Some that carry really heavy loads or extremely large boats might run a 24. Therefore, choose a prop size with a higher pitch like Stainless steel RubexL3 14. 5” one our speed is 30 knots at the same rpm. But in reality, your boat is too small and light to require such heroics. The cruise speed at 4000 rpm increases by 2 knots per each 1. Don’t Forget Your Engine’s Settings. On the other hand, a more excellent pitch will provide more spectacular top speeds but poorer acceleration. The number of major league pitches clocked at 100 mph and faster more than tripled over three years, from 1,056 in 2019 to 3,348 last year. Pitch: A Guide to Choosing the Right Prop for >The Perfect Pitch: A Guide to Choosing the Right Prop for. Speed is pitch. A larger diameter could keep RPMs down if the engine does not have enough torque to spin the larger diameter prop, as it will need more power to spin the same due to more drag caused by the extra weight of the prop and the larger blade. So, yes the 17 version will be a slower prop for your boat. Alternatively, a higher pitch will help the. 2 days ago · Rob Manfred refuses to give Bryce Harper more time with pitch clock despite injury concerns. I also have a 15 pitch which gives me 5700 rpms re prop your boat is what I suggest. Increasing prop pitch will make the boat go faster (provided the engine has enough power to keep the RPMs in the optimum operating range. Every inch of pitch usually changes the engine’s speed 150 – 200 rpm, so full throttle rpm should increase when using a lower pitch prop (of the same style). For example, a prop with 21-inch pitch will move forward 21 inches per revolution, whereas a prop with 17-inch pitch will only move forward 17 inches per revolution. For that twisted hunk of 2025T6 aluminum, having no. 7 prop would ultimately. The pitch of a prop is how many inches the plane will move forward per rotation. The average stainless steel propeller will cost a boat owner between $400 – $1000. The engines rpm reduces at WOT. The trick is to choose a boat propeller that delivers acceptable acceleration and top speed. The trick is to choose a boat propeller that delivers acceptable acceleration and top speed. If he lowers his pitch by two inches using the same 3 blade prop hell gain 300-400 RPMs which in theory should increae speed at the top end of WOT as well as help. A 4-inch pitch prop is optimal. The number of major league pitches clocked at 100 mph and faster more than tripled over three years, from 1,056 in 2019 to 3,348 last year. Once you have the RPM, you can calculate speed using the following formula: Multiply the RPM by the propeller pitch (e. Engine power does not really dictate prop diameter. May 3, 2023; Los Angeles, California, USA; Philadelphia Phillies. The cruise speed at 4000 rpm increases by 2 knots per each 1. Youd be more likely to use 10x4, 9x5 or 8x6, since these props would ultimately draw similar amps (theoretically, at least). Enter the high end of the operating range established by the engine manufacturer or the maximum RPMs you can attain with your current propeller. Propeller question: what do you go for? Bigger prop or >Propeller question: what do you go for? Bigger prop or. I think a lower pitch prop like a 10x3. 8 prop will give more thrust and less top speed than a 10x4. A lower pitch prop allows the motor to turn at a higher RPM so you get more power for 3D flying. To see the potential impact on top speed, enter your current values for Max RPMs, Gear Ratio, Pitch and Prop Slip in the Boat Prop Calculator tool. Rob Manfred refuses to give Bryce Harper more time with pitch …. What pitch prop gives more speed? Essentially, the higher the pitch, the greater is the speed in a slower acceleration. Propeller Pitch Adjustment Tips. com/_ylt=AwrEa1aJM1hkLm8_AmJXNyoA;_ylu=Y29sbwNiZjEEcG9zAzIEdnRpZAMEc2VjA3Ny/RV=2/RE=1683530762/RO=10/RU=https%3a%2f%2fcitimarinestore. The pitch is defined as the “theoretical distance” the prop will move through the water in one revolution, or turn. Normally you wouldnt consider 8x4 and 8x6 on the same plane. You could buy a new certificated metal propeller, but brace yourself for a shock. The disadvantage to SS props is their. A lower pitched propeller will create more power due to more engine RPMs, but the boat will move slower. A larger diameter propeller reduces the RPM and top-end speed. For example, a 19 pitch prop is theoretically going to move 19 inches through the water in one single revolution. To determine whether a prop is too long, you can easily compute the tip speed at maximum rpm. The recommended operating range. 5” pitch propeller our speed is 26 knots at 4000 rpm, with the 20”. Boating professionals such as Overtons or Dunnrite Propellers recommend matching your propeller diameter closely to the rated RPM of the engine. A prop that has a low pitch will create more power. Overall, the Aluminum prop gives you the ability to get the right type to complement the engine for a smooth ride. more pitch = lower cruise rpms , lower initiall take off rpms but will put more strain on the engine & have less initial push. Which gives more thrust? More pitch, less speed, or more speed, less. Will it get you to the desired speed range? Well, mathematically the 17 is about 89% of the 19 so 89% of your 2. This is part of the new pace of play rules that MLB is implementing to speed up the game. So there must be a pitch/diameter ratio which gives good/best efficiency. However there are a few things to keep in mind as far as power & pitch are. Aug 3, 2009 #2 less pitch gives more bottom end push while more pitch gives more top end push providing you have enough power to swing the prop with a lot of pitch put in. Dont Forget Your Engines Settings. Therefore, choose a prop size with a higher pitch like Stainless steel RubexL3 14. A lower pitch prop will give you lower speeds than a higher pitch prop when you cut the throttle. I think a lower pitch prop like a 10x3. It also gives you a better holeshot (meaning you can easily get up on a plane and catch speed from a stop position). To see the potential impact on top speed, enter your current values for Max RPMs, Gear Ratio, Pitch and Prop Slip in the Boat Prop Calculator tool. Picking a low pitch prop, you can get more power and acceleration to enjoy with the Quicksilver. Higher pitch gives you slower acceleration, less vertical performance, but higher top speed. These types of propellers, due to their expensive price tag and unique hub connections are less common than standard aluminum propellers. How to Calculate Propeller Pitch Speed. To this day, my dealer thinks I am BS-ing him. A prop with too much pitch may deliver more top speed because the prop moves further forward with each. Firewall Forward: Choosing a Prop for Your Project. Propellers can be made of composite, aluminum, and stainless steel. Large blade area as well if possible. Do they do a sail version of the engine?. If you run at better than 1500 rpm, a 4 blade will smooth out vibrations. For every two inch increase in pitch, you will increase speed 3-5 MPH and decrease the RPMs by approximately 400. mazco is known for their ability to blueprint a prop that will get every bit of speed out of your particular hull.