Boat Horsepower To Speed Calculator

Scientific Calculator Simple Calculator. MAXIMUM HULL SPEED Generally, the larger the boat, the faster it can go. Say you were walking backward again; your velocity is negative 2 m/s, although your speed is still positive. Go upwards from this line to the "average planing hull" curve and read the speed in mph. Who needs to go faster than that? If your lake is small, perhaps an even lower horsepower engine would serve the purpose. Thrust, measured in pounds (lbs) is the standard measure of how powerful a motor is. Result graphs are automatically generated and show speed in knots versus brake horsepower required. For years, we computed outboard gas consumption easily. High-performance boats are extremely fast and extremely enticing—and once the aquatic speed bug bites, you’ll never be same. If you can't find the torque or the engine speed in the owner's manual, search for the information online with the car's make, model, and year. The chart displays speed at different percentages of theoretical hull speed. This is NOT the most efficient tip speed range for your propeller to operate. Example: The Odyssey 18 rowboat has an overall length of 18' and a waterline length of 17'-7". In that case, your major. Previous page: Sizing the Engine Propellers come in various shapes and sizes, as they have to match the engine power and RPMs, the boat displacement and the main type of usage expected (it takes a different propeller to pull a skier fast out of the water, than the one that should efficiently and economically push heavy load). HP can be calculated if speed (forget ET) and vehicle weight is known. Engine RPM, or the speed at which the engine turns, can be calculated at any speed given the vehicle's tire size, axle ratio, and final transmission gear ratio. 90 GPH | Yamaha 70 hp 2-stroke 7. 15 ft/sec ^2) Convert ft. REMEMBER,. Jet Drive Impeller calculator, help in choosing the correct jet drive impeller for your jet drive boat taking into consideration horse power , torque and target RPMs. The formula for this is:. You will need to know your engine manufacturer, model or horsepower to determine which propellers will fit your boat. 45 MPH) The Gear Ratio between the engine and the prop shaft. This formula assumes that there is no current or wind resistance and the hull is clean and free of objects that could cause excess drag. Outboard motor gearcases come in all styles, sizes, and ratios depending on the motor’s attainable speed, horsepower, and type of usage. Given motor R. BRP recently announced the addition of a fourth model to its line of Evinrude E-TEC Pontoon Series outboards, designed specifically for pontoon boats, a 1. Effective prop-shaft HP Calculated Top speed (MPH). When communicating with customers, I always first ask for baseline information such as the pitch of prop they are running, gear ratio and engine RPM at wide open throttle. If you are looking to calculate how much speed you can get with an engine or prop upgrade on your pontoon boat, then there is some rough maths that you can do. While there were a few differences, most outboards burned gas according to the following formula: Gas consumption per hour= horsepower/10 A 40 hp motor would burn 4 gallons per hour. Scientific Calculator Simple Calculator. 2019 Yamaha 24 foot jet propulsion boat model AR240. The results are only as good as the data you enter. We use your calculator ideas to create new and useful online calculators. To get nmpg, divide boat speed in knots by gph. High-performance boats are extremely fast and extremely enticing—and once the aquatic speed bug bites, you'll never be same. Unless you’re into really bumpy rides and you’re trained for it, you’ll probably never need more, and most pontoon boat captains are perfectly satisfied with this top speed. Check the circle next to the item you are solving for and enter the remain three items in the spaces provided. Why power-to-weight ratio is important for speed and efficiency. So 10lb/ft is equivalent to using a 1ft spanner to undo a nut while exerting 10lb of force. The hardware enhancement reportedly enables the engine to generate "unprecedented torque and unmatched acceleration all the way from the lower end of the power band up to the 7,000 rpm maximum engine speed. per square ft of the prop disc. Note: This is a rough and quick estimate of engine horsepower. High-performance boats are extremely fast and extremely enticing—and once the aquatic speed bug bites, you’ll never be same. revised 8-26-24. It also has a direct effect on acceleration, cornering, pulling power, and fuel economy. Speed Distance Time Calculators Generic browser based speed, distance and time calculators written in javascript by Nigel Jones for performance oriented cyclists and other racers. 9 HP - 14′ Sport Family Yamaha 150 HP - 24′ Vista Funship Mercury 75 HP - 21′ LT Yamaha 150 HP - 25′ Vision Mercury 90 HP - 20′ Cascade Yamaha 150 HP - 26′ Vision Sandbar Mercury 90 HP - 22′ DRL Yamaha 150 HP - 29′ Grand Tahoe Mercury 90 HP - 24′ Vista Fish Yamaha 225 HP - 27′ Vision. 5-18ft aluminum boats running a 90 hp outboard (one being an express the other a triton). 2-liter outboards. Boat Speed vs HorsePower The engine horsepower (or watts) needed to move a boat through the water goes up with the 3rd power of the speed (assuming we are below hull speed and have the right prop). Seems to me that there was a graph that used to be posted often that would give speed based on hull configuration, weight and hp. Length of boat, diameter of tubes, number of tubes, weight of boat, balance of boat, with or without lifting strakes, prop curves, etc Until the HP is high enough to get your particular 'toon up on plane, your at displacement speed. Speed is the rate of change in position of an object, regardless of direction of travel. 3-liter triple-cylinder motor rated at 65 horsepower which will be available early this spring. To estimate the horsepower of an electric motor, you need to know the watts used by the motor at its fastest speed. 5 and the boat has :. Enter Distance in Nautical Miles Enter Time Traveled in minures. The capacity plate is typically located on or near the stern of the boat, and the horsepower limit is important to adhere to for safety reasons. For example, a 2,800-lb. Crouch showed that a useful prediction of speed could be made from the relationship. Horsepower is a measurement of power, or the rate at which work is done. Input a propeller pitch in inches and its RPM to see the theoretical maximum speed in miles per hour. Pontoon Boat Speed Calculator. Then use our calculator and the table here, to find out your boat's maximum horsepower. Comparison Test: Boat Props boaters spend countless thousands of dollars on machine-shop equipment and bolt-on gadgets in their quest to increase outboard horsepower. You will need to know your engine manufacturer, model or horsepower to determine which propellers will fit your boat. Trap speed is the velocity or speed of a vehicle at the end of a run or race competition. Overhead Cranes, Overhead Hoists, Closed Loop Cranes, Closed loop flux vector hoist, Hoisting Solutions, American Hoists. Formulas Used to Calculate Metrics Hull Speed Hull speed (measured in knots) is the theoretical limit at which your (displacement) hull can move through the water. The capacity plate is typically located on or near the stern of the boat, and the horsepower limit is important to adhere to for safety reasons. The result is the propeller slip. per square ft of the prop disc. This ratio is found by dividing the actual boat speed by the theoretical boat speed to get a ratio. 15 ft/sec ^2) Convert ft. Enter any 4 variables and the 5th variable will be calculated. Power Boats: Choosing the Propeller. Power to weight ratio is the primary factor, but it also takes into consideration the performance advantages of RWD and AWD over FWD, and the advantage of a Manual transmission over an Automatic. High-quality watercrafts built with attention to fine detail, Cobalt Boats range from runabout size to cabin cruiser varieties. An exponential function. We will cover 2 different methods for calculating fuel consumption when planning a boat trip. All-out wakesports excitement. As mentioned, a 100 on a 17ft boat is not a lot. 5 GPH: MerCruiser 4. Ideal Tip Speed varies depending on the H. HP can be calculated if speed (forget ET) and vehicle weight is known. The supersonic speed causes the blades to take a very high load due to the special airflow waves generated by the subsonic and supersonic changes! And finally, the Estimated flying speed field gives only an estimated information about the expected horizontal flying speed at full throttle. At the 34. com Salt Calculators. Calculate engine horsepower after a quarter mile run using the ET method. Calculate the hull speed, if the boat's waterline length is 12 feet. At this speed and with a 120-gallon fuel tank, the range would be 151 nautical miles. Understanding Boat Motor Sizing, and Kv Hey everyone im a long time RC Car and Plane enthusiast, but recently bought a Hornet F1 Tunnel Hull. For most mid-size boats (up to 40 feet) the best option is a higher revving diesel engine that generates torque at lower rpm. Outboard Motors. Yamahaboats. The thrust that is created enables your boat to move at the speed levels that you desire. Yet the easiest and least. We already have a sense of how these two parameters are related from the speed prediction formula used by Crouch. Not having to deal with extra batteries, particularly if you have to lug them in and out of the boat to charge them and such, was worth its weight in gold. 665 divided by the cube root of the Displacement over the required engine horsepower. Determine your boat's length at the waterline, based on its state or federal documents. Pitch is the theoretical distance that the boat will move forward with each revolution of the prop shaft, minus the slippage. 5kn with a 120hp engine. The calculators below can be used to calculate electric motor amps, horsepower and 3-phase kVa. Horsepower is a unit of power, and miles per hour is a unit of speed. By providing us with this information, we can complete a propeller analysis for you. Enter your search terms Submit search form : Web: www. Who needs to go faster than that? If your lake is small, perhaps an even lower horsepower engine would serve the purpose. There are so many factors that affect boat speed that it is hard to make accurate estimates of what the real top end will be. Although it does not allow for a vast range of boat sizes, designs, weights and other variables it gives an estimated speed. An exponential function. Readers here are familiar with the work of George Crouch in regard to predicting the performance of a moderate speed planing hull as a function of weight and horsepower. AnyCalculator. 0L sterndrive costs $3716 less than a 135-hp Optimax. Power Boats: Choosing the Propeller. Hull speed is expressed as 1. Check the circle next to the item you are solving for and enter the remain three items in the spaces provided. At the end of the day, don’t obsess too much about fuel costs. Trap speed is the velocity or speed of a vehicle at the end of a run or race competition. High-performance boats are extremely fast and extremely enticing—and once the aquatic speed bug bites, you’ll never be same. MPH = C x ( HP / LBS)^0. Result graphs are automatically generated and show speed in knots versus brake horsepower required. That may be 150 hp, or 600hp. So 10lb/ft is equivalent to using a 1ft spanner to undo a nut while exerting 10lb of force. If you are looking to calculate how much speed you can get with an engine or prop upgrade on your pontoon boat, then there is some rough maths that you can do. Learn more about different go-fast boat types, costs, and how to get started. The faster you go with an outboard the greater the hp required for ever smaller gains in top speed due to friction losses. Pitch is the theoretical distance that the boat will move forward with each revolution of the prop shaft, minus the slippage. Deviating significantly from the best diameter may result in. Then it depends on what year and how fresh the motor is whether you're getting the full 100. 0 GPH | Yamaha 350 hp 34. Check out the facts of our motors. The results are only as good as the data you enter. 012 Hydrodynamics for Ocean Engineers Reading: Propellers version 1. fiberglass bass boat powered by a 150-hp outboard will have a WOT speed in the 50-mph range, and will have its most economical cruise in the mid-30s with two people aboard. Re: Guide to calculate the right motor for a Sailboat Originally Posted by mmd Displacement is certainly one of the primary factors in determining required horsepower, and derivation of power requirements by evaluating similar vessels is a tried-and-true method. revised 8-26-24. Kilowatts (kW) to horsepower (hp) power conversion: calculator and how to convert. Horsepower is. The boat is operating in a full planing condition. As an assist in determining gross weight Chart 2 indicates the weight of a typical outboard motor based on the horsepower. Choosing the Right Pontoon Boat Engine. Displacement hulls have to push water out of their way to move forward and then water fills in the void behind, creating two types of resistance to their progress. MPH = boat speed in MPH HP = engine power in horsepower. At this speed and with a 120-gallon fuel tank, the range would be 151 nautical miles. These long, sleek speed boats boast incredible power, often running a pair of high-horsepower sterndrives, inboards, or multiple outboard engines to propel them swiftly through the water. Yamahaboats. This boat's combination of speed and strength gives it a top boat speed of around 25 MPH, even when you have a few friends aboard weighing it down. Learn more about different go-fast boat types, costs, and how to get started. Check out the latest sea-doo boats: models, prices, review, news, specifications and so much more on top speed!. Propeller Size Calculator for Displacement / Semi-displacement Hulls. Once you provide the specifications on your engine, we will display all of the propellers that fit your engine. High-quality watercrafts built with attention to fine detail, Cobalt Boats range from runabout size to cabin cruiser varieties. Calculating Your Boat's Power-to-Weight Ratio. For example for a 200 HP inboard engine Turbo Diesel (TIMONIER 745 for example) : 200/5 = 40 liters / hour. Semi-displacement, or semi-planing, boats normally operate at speed length ratios, V / LWL 1/2, from about 1. Horsepower with respect to speed is exponential as long as nothing else changes. (The real speed may vary in extreme situations like. I have a 50 hp Johnson outboard ( 2 cylinder, 2 stroke, date of manufacture December 1999 ) that is running very rich at idle speed. Propeller Pitch Explained. 5 and the boat has :. The Square Root of (Total Shaft Horsepower / Weight ) x Constant = Speed. Replacing An Outboard's Water Pump. com (Scale Model Calculator). Unless you're into really bumpy rides and you're trained for it, you'll probably never need more, and most pontoon boat captains are perfectly satisfied with this top speed. Previous page: Sizing the Engine Propellers come in various shapes and sizes, as they have to match the engine power and RPMs, the boat displacement and the main type of usage expected (it takes a different propeller to pull a skier fast out of the water, than the one that should efficiently and economically push heavy load). Power to weight ratio is the primary factor, but it also takes into consideration the performance advantages of RWD and AWD over FWD, and the advantage of a Manual transmission over an Automatic. What is the maximum speed a displacement vessel attain under ordinary conditions? Using a java script to calculate the answer using the formula provided in the very fine text "The Sailing Yacht" by Juan Baader pub. But other factors come into play, too: engine torque, engine thrust, the shape of the hull, and the intake and exhaust system. From new benefits like enhanced saltwater corrosion protection to a Limited Lifetime Structural Warranty on all models, Yamaha provides a superior ownership experience for every kind of boat owner. With only one person the boat would get on plane. Salt and brackish water is a corrosive killer, so flushing every time after saltwater use is a must. Go upwards from this line to the "average planing hull" curve and read the speed in mph. The boat is operating in a full planing condition. So, for example the following speed calculation could work, but it is very. The Calculate buttons and the Clear Values buttons only effect the individual calculator associated with that button, not all values on all three. Using this formula the popular Newport Vessels NV-Series 55lb Thrust Trolling Motor is rated as 624 watts at the highest forward speed and so 624/746 = 0. While there were a few differences, most outboards burned gas according to the following formula: Gas consumption per hour= horsepower/10 A 40 hp motor would burn 4 gallons per hour. com (Not exact but close enough) ArkMailBoxes. Tips for selecting the right engine for your pontoon boat. Horsepower is. Try different temperatures then you will see just how much the speed of sound can vary. Power is a product of torque. This here'll calculate the theoretical top speed of your car discarding rolling resistance, wind, insects, photons hitting you, and other such real world stuff. Sponsored Links. So, if the throttled-back boat above travels at 17 knots, it would get about 1. Then wattage divided by 746 will give you an estimate horsepower of the motor. So I have decided to create a user-submitted database of boats and their fuel economy. Calculator Ideas. It does not account for pitch measurement imprecision or unloading in the air. I have read many reviews on it as the RTR kits can like always be upgrade to perform a lot better. The propellers suggested by our Prop Calculator are based on Honda's extensive experience in prop selection. From all this data, they came up with a few very simple equations to say "For a boat of this length, beam and configuration, any engine larger than X horsepower is likely to be difficult or impossible to handle at top speed". 34 Velocity = (g * Length / 2 pi) ^ ½ g = acceleration of gravity (32. Top speed was about 18, and 16 or so loaded with the 40hp Yammy I started with on it. I will use the variables HP for power, RPM for propeller shaft speed, MPH for boat speed, and state this relationship mathematically with (1) HP = (f)RPM. 2-liter outboards. This calculator has been designed around statistical averages based largely on sample data from Edmunds. How to choose the right engine for your boat. The world of go-fast boats is one like no other. 0-60 mph Calculator for Cars. com Salt Calculators. Or to put it another way, a given amount of net horsepower will produce less speed as you add engines. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful. This speed calculator is a tool that helps you determine the average speed of a moving object based on the distance traveled over a certain time traveled. At this speed and with a 120-gallon fuel tank, the range would be 151 nautical miles. This can be a result of neglecting the exhaust or intake manifolds when converting your outboard. Speed is a factor of prop pitch and motor R. 8 Liter High Output Yamaha marine engines. Learn more about different go-fast boat types, costs, and how to get started. For example, a twelve-foot boat with a four-foot transom width translates into a maximum engine size of fifteen horsepower. Most manufactures provide you with the amps a motor uses at full speed. Electric Motor Calculator Calculate amps, hp and kVA. Outboard Horsepower Capacity. 84 horsepower. Calculator Popups. Sponsored Links. Calculator Use. Re: Horse power requirement for a displacement hull A very good book, and yes I know that this is for a sailing boat, and a slight amount more horsepower would as a consequence be a good idea due to the extra wetted area of the keel and the windage of the rig, but the book is Benfords "Small Ships" which has a series of tables using. Displacement hulls have to push water out of their way to move forward and then water fills in the void behind, creating two types of resistance to their progress. have a Coast Guard Rating Plate which specifies the maximum recommended horsepower for the hull. It doesn't matter how much sail is in use, your boat can't go any faster than this in normal conditions. Check out the latest sun tracker boats: models, prices, review, news, specifications and so much more on top speed!. Calculate the hull speed, if the boat's waterline length is 12 feet. Slip is the most misunderstood of all propeller terms, probably because it sounds l. With our propeller finder, you’ll be able to narrow your search for the most ideal prop considerably in just four simple steps. Propellers. For a vehicle to attain a particular speed, X amount of HP is required. com Salt Calculators. We use your calculator ideas to create new and useful online calculators. However, if this information is missing or you would like to calculate the horsepower manually, you can use a simple formula that takes into account the vehicle's weight and speed. Outboard Motors. 6000 RPM) The true speed of the boat taken at the same throttle setting. This here'll calculate the theoretical top speed of your car discarding rolling resistance, wind, insects, photons hitting you, and other such real world stuff. Starting with the boat's LWL, from the graph you determine the boat's C-value. This calculator has been designed around statistical averages based largely on sample data from Edmunds. Re: Guide to calculate the right motor for a Sailboat Originally Posted by mmd Displacement is certainly one of the primary factors in determining required horsepower, and derivation of power requirements by evaluating similar vessels is a tried-and-true method. Engine RPM, or the speed at which the engine turns, can be calculated at any speed given the vehicle's tire size, axle ratio, and final transmission gear ratio. Follow us on Facebook at https://www. Sponsored Links. Horsepower with respect to speed is exponential as long as nothing else changes. If the Factor is over 52. Using the "back" button on your browser,. This formula assumes that there is no current or wind resistance and the hull is clean and free of objects that could cause excess drag. The Mercury® exclusive X7® alloy makes the Chopper II propeller more durable than ever. 5, if the horsepower capacity calculated in Table 183. Boat Maximum Horsepower Calculator. Due to prop slip the boat is actually going slower than the theoretical speed. The Chopper II, designed for 40-60 horsepower outboards, works well on boats requiring bow lift. Calculate Rear End Gear Ratio Enter the tire diameter in inches, rpm's of the motor at a certain speed as indicated by your speedometer in mph. The Yamaha 70 hp, 60 hp and 50 hp Midrange four strokes are the go-to outboards for family, fishing and fun. 92 mach is a redline. Speed Distance Time Calculators Generic browser based speed, distance and time calculators written in javascript by Nigel Jones for performance oriented cyclists and other racers. 34 X the square root of LWL, or length of waterline. Note: For flat bottom hard chine boats, with a factor of 52 or less reduce HP one capacity increment. Thrust is simply a static measurement of pushing or pulling power, and higher thrust does not necessarily mean greater speed. Estimate Only. Use Boat Trader to find out which boat or yacht is right for you. HP can be calculated if speed (forget ET) and vehicle weight is known. Just about all planing hull boats with gas engines should get on plane and hold it (with the aid of trim tabs) at about 3000up to about 3400. The most important consideration is to always abide by your boat manufacturer's horsepower rating guide and max limit. Horsepower Required for Hull Speed. via https://www. The supersonic speed causes the blades to take a very high load due to the special airflow waves generated by the subsonic and supersonic changes! And finally, the Estimated flying speed field gives only an estimated information about the expected horizontal flying speed at full throttle. Comparison Test: Boat Props boaters spend countless thousands of dollars on machine-shop equipment and bolt-on gadgets in their quest to increase outboard horsepower. 2 GPH | Yamaha 225 hp 17. Mark's Marine is a premium marine dealership located in Hayden, ID. From new benefits like enhanced saltwater corrosion protection to a Limited Lifetime Structural Warranty on all models, Yamaha provides a superior ownership experience for every kind of boat owner. Then enter the time value and then select the conversion designation for the speed answer. speed of 10,000 RPM. High-performance boats are extremely fast and extremely enticing—and once the aquatic speed bug bites, you'll never be same. The boat is operating in a full planing condition. Pitch is the theoretical distance that the boat will move forward with each revolution of the prop shaft, minus the slippage. One horsepower can move 33,000 pounds one foot in one minute. 50 GPH | Yamaha 50 hp 4. As far as the boat itself goes, pretty much any boat below the 22' mark can reach it with a 90hp engine and medium load. Use accurate data. 3-liter triple-cylinder motor rated at 65 horsepower which will be available early this spring. Unless you're into really bumpy rides and you're trained for it, you'll probably never need more, and most pontoon boat captains are perfectly satisfied with this top speed. * Electrical horsepower is used for electric engines and air conditioners. Find your Ideal Quicksilver Propeller in 5 steps or less. Seems to me that there was a graph that used to be posted often that would give speed based on hull configuration, weight and hp. For a vehicle to attain a particular speed, X amount of HP is required. Calculate the hull speed, if the boat's waterline length is 12 feet. We offer the most-complete line of outboard power, for fishing boats and speed boats, for pontoons and tenders, for work and for play. However, if this information is missing or you would like to calculate the horsepower manually, you can use a simple formula that takes into account the vehicle's weight and speed. 7-mph top speed of the sterndrive, the outboard burns 13. Read Comments. For example, if your small pulley is 6" diameter, and spins at 1000 RPM, and you need to find the second pulley size to spin it at 500 RPM, Enter Pulley1 Size 6, Pulley 1 RPM 1000, Pulley 2 RPM 500, and hit Calculate to find the second pulley diameter. Calculate the hull speed, if the boat's waterline length is 12 feet. Walk forward or backward at 2 meters per second, and your speed is just that: 2 m/s. Hey Steve, I wouldn't disagree with what your saying, I've seen speed boats with a hull texture similar to orange peel, I understand it puts air between th hull and the water, but going on my experience, first time I took my boat out I didn't get much over 55, I washed, buffed, and waxed and get near 65. Starting with the boat's LWL, from the graph you determine the boat's C-value. 8 GPH | Yamaha 300 hp 26. 0-60 mph Calculator for Cars. by Norton & Co. A good combination of these components will make for exceptional tops speeds, such as those produced by certain Seadoo and Kawasaki models. Outboard Motors. Propeller diameter is chosen to be optimal for the boat's particular combination of horsepower, RPM and speed. Propeller choice can affect boat top speed by as much as 5 to 10 MPH. But you don't have to equip your boat with as much horsepower as it can handle either. Then use our calculator and the table here, to find out your boat's maximum horsepower. Visit the specific RC - Radio Control Section on the above menu bar for more information or to learn how to get the most out of each calculator. Use the CalcT button to figure the theoretical speed from the actual speed and slip. Determines the theoretical horsepower required for a displacement hull shape to reach hull speed. The hardware enhancement reportedly enables the engine to generate "unprecedented torque and unmatched acceleration all the way from the lower end of the power band up to the 7,000 rpm maximum engine speed. Water Meet Power. Once you provide the specifications on your engine, we will display all of the propellers that fit your engine. (The real speed may vary in extreme situations like. Check out the facts of our motors. 3 GPH | Yamaha 200 hp VMAX / HPDI 19. When communicating with customers, I always first ask for baseline information such as the pitch of prop they are running, gear ratio and engine RPM at wide open throttle. That may be 150 hp, or 600hp. However, in order to reach speeds in excess of maximum displacement speed, a vessel must have the appropriate aft quarter butt exit angle. This free engine horsepower calculator estimates vehicle engine horsepower using two different methods, the elapsed time method and the trap-speed method. 34 X the square root of LWL, or length of waterline. 1 GPH | Portable outboard Yamaha 4 - 5 - 6. 6000 RPM) The true speed of the boat taken at the same throttle setting. Light and powerful, they sport 1-liter displacement, single-overhead-camshaft designs and electronic fuel injection. 0-60 mph Calculator for Cars. I have read many reviews on it as the RTR kits can like always be upgrade to perform a lot better. If it were shown on a graph the curve gets steeper and steeper beginning to rise dramatically at the max hull speed. If it were shown on a graph the curve gets steeper and steeper beginning to rise dramatically at the max hull speed. Propeller choice can affect boat top speed by as much as 5 to 10 MPH. Horsepower is a unit of power, and miles per hour is a unit of speed. Unless you’re into really bumpy rides and you’re trained for it, you’ll probably never need more, and most pontoon boat captains are perfectly satisfied with this top speed. Outboard Motors. However, in order to reach speeds in excess of maximum displacement speed, a vessel must have the appropriate aft quarter butt exit angle. Find your Ideal Quicksilver Propeller in 5 steps or less. Your Chevy 350's owner's manual should include its horsepower in its specifications. We can convert this into watts by multiplying amps drawn with how many volts your battery produces (12V for one battery, 24 for two, etc. Then, this ratio is subtracted from 1. Pontoon Boat Speed Calculator. ¼ Mile ET & 1/8 Mile ET Conversions : ¼ Mile ET : 1/8 Mile ET : Enter the ¼ Mile ET or the 1/8 Mile ET and Click on Calculate ¼ Mile ET = (1/8 Mile ET +. Crouch showed that a useful prediction of speed could be made from the relationship. via https://www. By providing us with this information, we can complete a propeller analysis for you. com (Not exact but close enough) ArkMailBoxes. Note how important the weight factor is in a planing boat, and the smaller the boat the more important it becomes. As a follow up, this week's #TrainingThursday will cover How To Calculate Fuel Consumption. So, for example the following speed calculation could work, but it is very. Power is a product of torque.