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Rc Plane Prop Size Calculator

Rc Plane Prop Size Calculator

For a prop of that size, 50% is even a good efficiency (it contains the drivetrain efficiency too) if you're lucky to have a well-choosen prop and if you're diligent enough to keep it clean of marine growth. Great Planes Extra 300S. On the same 10 Volts the prop RPM is 20,000/3 giving a prop RPM of 6,666. In a single-engine airplane, the propeller blade wake will beat on the windshield producing noise. Aircraft Engine Thrust and Horsepower Calculators Input the required values and click on Calculate. Find your Ideal Quicksilver Propeller in 5 steps or less. 5" - 7" Propellers; 8" - 10" Propellers; 11" - 13" Propellers; 14" - 16" Propellers; 17" - 20" Propellers; 21" - 24" Propellers; OTHER PRODUCTS. boat propeller 400 About Us Delivery Returns Payment Contact Us About: It's a tricky question when people ask who we are. Quadcopter Propeller Size. New to RC flying? Get my popular ebook today, to help you on your way! Understanding RC propeller size. And large diameter props create more drag, therefore limiting speed. If you have ever tried to figured out the size of the electric motor needed on a homemade or other type of RC airplane and delved into the world of kv and watts and ESC amps then you probably have a few less hairs on your head because of it. fees for dealer installation of options, taxes, title, registration, documentation and licensing may vary by location and are in addition to prices shown. Find personal finance, mortgage, investment ideas, market information, and stock. Motor/Propeller Characterization The combination of a propeller and an electric motor, shown in Figure 1, can be viewed as a propulsion unit whose thrust T(V,v) and current i(V,v) both depend on the air velocity V into the propeller, and the voltage v applied to the motor terminals. To indicate a proper CG how to rc plane will help you find out from a very basic approach to a serious calculation one. Threads and shaft fitting sizes: Default threads are metric coarse pitch in proportion to the prop size. Easy to construct but with an unprecedented level of realism, It really is the ultimate Millennium Falcon model. What's the difference?. That is mostly determined by the propeller pitch. An example of this would be the apc5x5e and apc5. per square ft of the prop disc. Keep face and body out of prop arc as engine is started and run. 0), prop pitch (the distance that a propeller would move forward in one revolution), prop slip (the efficiency of the prop, lower at high speed, but perhaps very inefficient at low speed) and the boat speed in mph. Estimate Electric Motor and Prop Combo- calculate thrust,watts,flight time etc - India's open forum for RC flying, planes, helicopters, aeromodelling, cars and hobby stores. Engines / Mods / Prop GARRETT TPE-331-2-201A SUPER: 3540 HOURS SUPER 2 is a -2 engine that has been fitted with a bigger compressor section (the size of a -5 engine). 5 - Grey US$ 2. These spinners have an Ultra Light weight machined aluminium back plate which is designed to pull air through the front of the spinner past the prop and through in to the motor. Measure the small end to the taper inside diameter of propeller - nut end I. Van's Aircraft is the leading designer and manufacturer of kit aircraft, with more than 10,000 flying aircraft and a wide selection of available models. This is especially useful for slower-flying planes, or planes where top-end speed is less important than vertical climbing ability. Speed is more related to pitch. These formulas are simply presented for your amusement. The size of a propeller is usually expressed in the form diameter x pitch. You also need to get either a 6X5E TGS Sport Prop (recommended) or a 7X4E TGS Sport Prop. A 9*6 prop might be all to big for a 150 KV motor - if you have a 12 cell LiPo. We started with a 12 X 6 prop, very fast, have been using an 11 X 3/8 for a month. For more information see our engineering design and manufacturing pages. The vast majority of planing hulls have a constant "C" value of 150, or just slightly above. Estate item. Discard any prop with nicks, scratches, splits, cracks or any other sign of damage. Here are the specs: So the way I get it is that the. Be sure to take a look at the Prop Slip page for an explanation of how to find your prop slip. However, it would not be the best answer for a lumbering 40 glow trainer with lots of room for prop growth. An often referred to type of seaplane is a "flying boat" which is built around a single hull which serves as the plane’s floating body/fuselage. Please fill out all required fields before submitting your information. 3 Blade Propellers for RC Airplanes We carry a wide variety of 3 Blade Propellers for RC Airplanes. Estimate Electric Motor and Prop Combo- calculate thrust,watts,flight time etc - India's open forum for RC flying, planes, helicopters, aeromodelling, cars and hobby stores. 904*D2 For four blades D4 = 0. Now we need to choose the pitch of the prop. From the graph, we can see that an RC Airplane with small Aspect Ratio stalls at a higher Angle of Attack. Propeller size is the output of a good harmony among Airplane weight, Engine size, Type of plane we fly. Debuting the latest innovation in flight training – the Interactive Flight Operations Manual (iFOM). " Yes, you could iteratively come up with an estimate. HQ Durable Prop 7x3. How RC Props Work. Surfbaud Freeware Propeller Calculator is an Excel spreadsheet program. What is a folding propeller? Unlike a fixed propeller attached to a radio controlled plane, when we say "folding propeller" we are usually referring to one or more parts which comprise the entire mechanism of the folding propeller. The Big Question: Which motor does my plane need? Here's an introduction to the specs and knowledge you need to make an informed choice. Search our database to find the best new and used aircraft for sale such as business jets, helicopters, UAVs, Drones, and more now. 47 = 351 watts. 52 2 -stroke, which means swinging an 11 -13 ”prop. We got many different types of RC airplanes, all with different styles and options. Everything you get, from award-winning trading tools, to guidance and retirement resources to industry-leading service, is built around you. I am working on a project where I need to understand flight physics. • Made of durable aluminum alloy developed to withstand salt water and cavitation damage. Diameter is the measurement, usually in inches, of the propeller from tip to tip. In reality, pitch also. ( inside diameter) Measure the large end to the taper inside diameter of propeller - front end I. Propeller Depot offers the best prices and service on all inboard, outboard, and stern drive boat propellers. For three blades D3 = 0. A 9*6 prop might be all to big for a 150 KV motor - if you have a 12 cell LiPo. Calculating Brush-less motor and prop size for RC Airplanes. Flite Test - FLITE TIP Choosing A Propeller A Hobby King sponsored segment. Our RC club the Radio Control Association of Central Florida has had a couple of "building nights" to teach people how RC planes are built. A flying boat takes off from and lands on its belly. 60 Size IC 12S LiPo 40. Quadcopter frame is important component of quadcopter, Thare are a lots of quadcopter frame sizes and no thumb rule for size of the frame,but The most common is from 180mm to 800mm. The subject of radio control propeller size selection can be a bit of a minefield, especially for the beginner to the hobby, but outlined below are some generally accepted guidelines and recommendations for choosing the right prop for your plane. Great for use at a remote camp site too. The blades have a large area, much like marine propellers, because they're designed to move a large volume of air at a relatively low motor speed. If you want the quietest and most efficient thrust propeller system, select a prop configuration (and reduction drive ratio) that will keep the tip speed for your cruise rpm at or below 700 feet per second or 475 mph. Input a propeller pitch in inches and its RPM to see the theoretical maximum speed in miles per hour. Calculating Brush-less motor and prop size for RC Airplanes. I now look at the type of prop the original glow model would use. However, not. Propeller Selection. 46 laser cut parts. The size of propellers a motor is designed for determines the prop shaft size. Prop Size Calculator New Member Section. Total Cost of Ownership and CO 2-Analysis of an EV; cgCalc: Calculate, evaluate or verify the Center of Gravity (CG), Neutral Point (NP) and Aerodynamic Center (AC) of your airplan before maiden. requirement , (which should acheive a mininum prop thrust in general ) for the type of rc planes you profiled. I have recently went from two to three blade on two of my nitro planes. 18"diameter X. It does not account for pitch measurement imprecision or unloading in the air. Many sport and aerobatic planes will opt for this route, as should every pylon racer. Discard any prop with nicks, scratches, splits, cracks or any other sign of damage. Never throw anything into the prop to stop the engine. (See below). Mini Prop; ESC for Plane/Heli. Flite Test - FLITE TIP Choosing A Propeller A Hobby King sponsored segment. A high speed propeller might be fitted when the aircraft is intended to be operating at, or above, rated power for short periods – in speed competition for example. lipo battery calculator. Technological innovation, win-win cooperation, integrity and service make T-MOTOR a reliable partner for drone manufacturer and distributors for long-term collaboration. Extented version (allows you to take user defined components into account) Mail comments and suggestions to:. At the Langley Memorial Aeronautical Laboratory, E. 9 pitch = 1. Shop online and save!. 26 Awesome delta wing rc plane plans Small enough to easily fit in most medium size vehicle while still large enough to take. *** Return / exchange / refund is not allowed if the item has been used or flew. Aviation's most powerful operating cost application is here. BLDC SOLUTIONS Neumotors product line includes motors from 50 watts to 50kW output. PropCalc Ecalc (best, but needs membership) Webocalc calculate your prop size Understanding Propeller Size Propeller Aerodynamics Static Thrust Calculator Choosing Propellers Drive Calculator (see PropCalc) Outrunner Calculator Foilsim (simulate an airfoil) Aircraft Rotations (and more) Wing Incident Setting B2Streamlines (great links in there. For example, one of the common types of question we receive asks how to convert the pounds of thrust generated by the jet engine(s) on a particular plane into horsepower. NiCad basics, specs and maintainance. Join now to access over 2. Use this to solve for C_D. Airplane propeller diameter vs pitch is an element that engineers constantly go over. You will find fasteners, building accessories, Pilots, and much more! scale propellers remote control aircraft large scale planes. The best service and prices, with the largest inventory & fastest shipping. I didn't touch the plane for about eight months. How fast can an average sized RC plane go? Well first what do you consider average? Does it have a propeller or electric duct fan engine (EDF). A four blade prop will pull better at low speeds and get you up on a plane quicker, but it will have more drag and be marginally less efficient at higher speeds. Watch your weight and balance, gas engines are a lot heavier then glow. We have a wide selection of aircraft for sale. It has a plastic clunk tank and an unusual cast crankcase. From 8mm to 25mm, that’s M2, from 30 to 60mm M4, larger sizes M5. Ready To Fly; RC HOBBIES / Propellers / Three Blade Props; prev. Introduction on LiPo batteries. HQ Durable Prop 7x4x3. Pitch Speed Calculator. 5:1 is needed in order to the plane be able to takeoff from the ground. requirement , (which should acheive a mininum prop thrust in general ) for the type of rc planes you profiled. A handy thing to have around when covering a airplane is a old folded king size bed sheet. I ignore thrust out of the calculator since static thrust isn’t all that useful for a dynamic plane, as well as the final results are often 25% lower than the calculator estimated, but flying speed is usually pretty close. -The graphic display's are navigated using the mouse pointer. Most props are left hand props, except for the ones labeled with an "R" after the prop Size. Vicprop, marine propeller specialists. The simplified form is shown you help you put the equation into a calculator or Excel spreadsheet easier. For long flight times, use a low KV motor with a 4s or 6s battery and 12-13 inch propellers. A prop size and pitch is determined by the particular model and desired flying style, with the additional requirement that the maximum rpm should remain reasonable. Each quadcopter frame with different attributes is designed for different style quadcopter such as fpv / sport racing / cameras / mini etc. Props & Spinners. For more information see our engineering design and manufacturing pages. HQ Durable Prop T3X3 Black US$ 1. It can also be looked at as the distance across the circle that the propeller would make when. Sales, Supplies, and Service. Unlike with a plane propeller, drag isn't an issue, so it doesn't really matter how big the blades are. By equating the power at sea level to the power at our elevation, and solving for D, we get, D = D 0 (1/ρ) 1/8. Welcome to Canadas largest RC Forum, RC Canada. The aircraft is capable of operating from rough, dirt strips and is the prime transport for paradropping troops and equipment into hostile areas. The size of a propeller is defined with two sets of numbers, diameter and pitch, with pitch always following the diameter. HOVERHAWK Propeller and Fan Tip Speed Calculator Determine Propeller RPM Redline Would you like to know how fast your propeller tips are traveling? Enter some different combinations of prop diameter and RPM setting below to find out. To understand more about the performance of propellers, and to relate this performance to simple design parameters, we will apply actuator disk theory. I get so many emails from NCLEX test takers that say there were medication questions on the nclex of medications that they had never heard of. However, the maximum useful prop diameter will be limited by the speed of the prop tip. These make great gifts for children and adults, but be warned, flying RC airplanes correctly take a lot of skill and practice. If you can not find the file you are looking for the Search Function might be helpfull and otherwise you can always ask in the forums!. We can then define. I am having some trouble getting the whole torque vs power vs thrust thang. Kids will love this during rainy days. Nor does it account for propeller inefficiencies. Reinforced Concrete Wall Design Basics Mike O’Shea, P. ElectriCalc What is ElectriCalc? Software Demos View the ElectriCalc Help File Backing up ElectriCalc Windows 7 Install Help. The Big Question: Which motor does my plane need? Here's an introduction to the specs and knowledge you need to make an informed choice. Quadcopter Propeller Size. RC Model Aircraft Center of Gravity Calculator v3 (replaces v1. Ranging from a. We also have a vast selection of associated accessories such as prop adapters and spinners. Innov8tiveDesigns. But this is the ideal power, assuming the propeller is 100% efficient, which of course, no propeller is. An often referred to type of seaplane is a "flying boat" which is built around a single hull which serves as the plane’s floating body/fuselage. BLDC SOLUTIONS Neumotors product line includes motors from 50 watts to 50kW output. Extented version (allows you to take user defined components into account) Mail comments and suggestions to:. Globe Investor offers the most current and up-to-date information on stocks and markets from The Globe and Mail. Maybe you have some questions about quadcopter weight calculator and thrust calculator? and what’s kind motors and propellers would I have to buy and be able to lfit?. Join now to access over 2. eCalc Online Setup calculator by Hacker Motor Which Prop is suitable for my hacker engine? Can I use 5 instead of 6S LiPo? BEC and RC-Electronic. Discover recipes, home ideas, style inspiration and other ideas to try. Are more propeller blades better? Jeremy Kinney, a curator at the National Air and Space Museum, shares his thoughts A sailor hoses down the propeller on a P-3 Orion during an aircraft wash on the flight line at Naval Air Station Whidbey Island, Washington. 1) Select an object on the plans you already have (e. Welcome to Master Airscrew For more than 40 years we have envisioned, designed, and manufactured model airplane and multi rotor propellers with utmost precision and care. 52 2 -stroke, which means swinging an 11 -13 "prop. Read Comments. Wooden Model Ship Fittings Propellers come in a range of sizes and shapes. Many modelers ask the question-What size propeller should I use on my RC airplane? Well a good place to start is the RC prop chart from Top Flite Models. February 14, 2000. All I can say is WOW. "V" 6 engines diameter size goes from 14" to 15" You cant put a 15" diameter on a "V' 4, as it won't clear the antivent plate. The below given is the online Hull speed calculator which you can use it for the boat displacement speed calculation with ease. Miami-Dade County's Open Data Hub promotes access to the County's publicly available data, allowing citizens to better understand our community. As a result the motor will run cooler and wear less, leading to a longer motor life. Flexofold Folding Propeller. Determine flight characteristics of your plane including wing loading, stall speed. Many of these areas have changed for the better. The one stop source for expert advise for everyone from the begining hobbiest to race professional. Shop online and save!. The engine was designed for power launching Radio Controlled Gliders and had a red tank with a blue spinner. That's why many RC hobbyists seem to enjoy RC airplanes the most out of all other RC vehicles. Total Cost of Ownership and CO 2-Analysis of an EV; cgCalc: Calculate, evaluate or verify the Center of Gravity (CG), Neutral Point (NP) and Aerodynamic Center (AC) of your airplan before maiden. 26 Awesome delta wing rc plane plans Small enough to easily fit in most medium size vehicle while still large enough to take. Hull Speed Calculator. Longer propellers can generate more thrust at the same speed, but requires more torque from the motor to turn the prop. Motor/Propeller Characterization The combination of a propeller and an electric motor, shown in Figure 1, can be viewed as a propulsion unit whose thrust T(V,v) and current i(V,v) both depend on the air velocity V into the propeller, and the voltage v applied to the motor terminals. The blades of the rotating propeller push against the atmosphere, and by Newton's Third Law, the air's reactionary force pushes the aircraft. Hovercraft Aircushion Calculator Propeller and Fan Tip Speed Calculator. 019 times the size. All files are sorted by category. Propeller Depot offers the best prices and service on all inboard, outboard, and stern drive boat propellers. You don't want a fan to spin too quickly and skid across your desk. NiCad basics, specs and maintainance. Anytime the aircraft is in motion (and the propeller is turning, of course) the path of the tip of a prop blade through the air is a helix, and therefore, it's velocity (the "tip speed") is the vector sum of the rotational velocity plus the translational velocity, or the helical tip velocity. It has a KV rating of 985 - much lower than the hotter 3025/6. i use 3 blade, 3 blade counter rotating and a 4 blade variable pitch set ups. Everyday mature productive discussions. Compare this with a Hyperion 3025/8 - that is the same size motor physically (armature 30mm diameter and magnets 25mm long), but it is wound with 8 turns of thinner wire. Combinations of motor, ESC, battery choice is closely related to the size and design of the plane (drag, aerodynamics) and the prop used, along with other factors. And yes, it does matter. LOREN COOK COMPANY is proud to be a leader in the design and manufacturing of fans, blowers, gravity vents, laboratory exhaust systems, and energy recovery ventilators. How to Change Propeller Pitch. A constant speed propeller allows the engine to develop maximum rated power and rpm during the ground roll and to develop full power throughout its normal rpm range. Though this number can be changed later after some flight testing, typically we calculate the pitch of the prop to be about 50 percent its diameter which should be good for sport aerobatics with a good climb rate. In RC we should follow their example and go through an equipment and safety checklist to make sure Plane weight is not calculated just by size but by wing. engines are known for having. 20 Size IC 10S LiPo 33. A lower pitch prop will cause the airplane to take off quicker and climb faster. RCTimer - the world's No1 Online Hobby Store. It is these two forms of the power equation that are most applicable to aviation. Other model propeller lines have different prop coefficients as a function of advance ratio, J, and therefore might not give similar results. 750 watts = 1 horsepower. Upgrade your 150cc size gas engine model with the Turnigy RotoMax 150cc Brushless outrunner motor. The Pelican ULTRA is designed to carry 1400 tonnes of cargo over a distance of 16,000 kilometres in one journey. Due to the delicate nature of propellers, returns are limited. All I can say is WOW. 60 Size IC 12S LiPo 40. Determine flight characteristics of your plane including wing loading, stall speed. All delivered for both shaft- and sail drive installation. Maybe the first thing to clear up is the difference between a model aircraft ENGINES and model airplane MOTORS. To figure out how far a particular prop will travel, we need to know the total pitch, which is the diameter x pitch. View the source. We have more flexibility of the mounting position to help the CG. Pitch is the amount of ‘twist’ the propeller has and is roughly defined as the distance the propeller advances per a single revolution of the blade. However, not. A flying boat takes off from and lands on its belly. The forum covers all thinks that cover First-Person View (FPV) flying and vehicle operation. Simply multiply the current by the battery voltage to get power. You don't want a fan to spin too quickly and skid across your desk. We have the lowest prices on hundreds of boat propellers. Shop online and save!. You can measure the taper bore of a propeller with digital vernier calipers. However, it would not be the best answer for a lumbering 40 glow trainer with lots of room for prop growth. Start Search. The blades have a large area, much like marine propellers, because they're designed to move a large volume of air at a relatively low motor speed. The rest is determined experimentally. How to Calculate the Prop Size for an RC Plane One of the most important steps in building your own RC plane is choosing the right propeller. You can again, use the plot to see thrust = drag = ~0. Amazon Fashion. Surfbaud Freeware Propeller Calculator is an Excel spreadsheet program. 47 horsepower. motor is a little. We see that there are two possible ways to produce high thrust. Based on designs from the 1950s these beautiful scale props will provide great performance and a finishing touch to your aircraft. Make all adjustments from behind the prop except on pusher prop installations. Here is some calculators about RPM&Thrust&load weight and a simple example of its applications are given,if you want to know please go ahead. This is done to prevent the mains'l from becoming too big to handle. They are handy tools for RC setup and configurations. HQ Durable Prop 7x4x3. 750 watts = 1 horsepower. Learn More. A more efficient propeller will transmit more power to the air. HQ Durable Prop 7x4. Wing and fuselage. loaded boat will plane more quickly and enjoy better fuel economy. Most can be remotely controlled or set to autonomous flight mode. Total Cost of Ownership and CO 2-Analysis of an EV; cgCalc: Calculate, evaluate or verify the Center of Gravity (CG), Neutral Point (NP) and Aerodynamic Center (AC) of your airplan before maiden. Welcome to the WattFlyer RC Electric Flight Forums - Discuss radio control eflight. However, it would not be the best answer for a lumbering 40 glow trainer with lots of room for prop growth. Ranging from a. The blades of the rotating propeller push against the atmosphere, and by Newton's Third Law, the air's reactionary force pushes the aircraft. Miami-Dade County's Open Data Hub promotes access to the County's publicly available data, allowing citizens to better understand our community. Required prop pitch for top. Boat Propellers, Aluminum and Stainless Steel boat props - JT's Discount Props is Your Boat Prop Expert. RC Electric Motors: The types of electric RC motors available How to select the best RC electric motors for your application and descriptions of the brushless RC motors available today. Admittedly, rc prop balance is more critical in IC powered planes than EP ones, since electric motors run smoother anyway and so there is already less vibration to worry about, but it is good to get in to the habit of balancing your propellers anyway, regardless of power type. 45 MPH) The Gear Ratio between the engine and the prop shaft. Pitch is the amount of 'twist' the propeller has and is roughly defined as the distance the propeller advances per a single revolution of the blade. The perimeter speed of the propeller blades also very important! It should never be higher than the standard supersonic limit (approx. Rc airplane propellers are usually given a two number value which values are related to Diameter and Pitch. You will discover that all props are not created equal. Stay in the Know: Sign up to join our Mailing List. 25x19 & a 15x19. Interesting to note that in my email exchange with Joshua, he also talked about prop size but he converted prop sizes to the equivalent frame sizes. “I think our community lost something and this is our community grieving together," said local state Rep. Maybe you’re building a plane from a kit that doesn’t include props, or you want to upgrade the stock options? There should be prop size recommendations from the manufacturer in each case. A static thrust to weight ratio greater than 0. Sizing an electric RC brushless motor I am going to try to keep this as simple as possible and present you with just the needed information. Looking at the listing for the plane, it says to use a. R/C Vehicle Speed Calculator. Air can also be introduced into the system via the inspection cover, so you will want to make sure the cover is tight. Brushless Motor Ratings. APC E-flite Flyzone FMS Great Planes HobbyZone. HOW TO CHOOSE A RC ELECTRIC MOTOR AND PROPELLER FOR YOUR PLANE RC AIRPLANE RADIO CONTROL CRASH. ( inside diameter). Miami-Dade County's Open Data Hub promotes access to the County's publicly available data, allowing citizens to better understand our community. Are more propeller blades better? Jeremy Kinney, a curator at the National Air and Space Museum, shares his thoughts A sailor hoses down the propeller on a P-3 Orion during an aircraft wash on the flight line at Naval Air Station Whidbey Island, Washington. 80% of max prop shaft rpm desired speed expressed as feet per minute. Makers typically put the prop sizes in the tech spec sections of instruction manuals. Please fill out all required fields before submitting your information. The first is the motor's can diameter in millimeters; the second, its length in millimeters. ; Explanation; In order to create the most. A new 2 stroke 50 HP with prop and controller would probably run close to $4000. ElectriCalc What is ElectriCalc? Software Demos View the ElectriCalc Help File Backing up ElectriCalc Windows 7 Install Help. RC AIRPLANE PROPELLERS. General operating and flight rules. Theoretical required prop pitch in inches. So, a prop described as 15 x 18 x 4, is a prop with a 15" diameter, an 18" pitch, and has four blades. It is soft and heavy enough to hold down a wing when stretching the covering over the ends or use it to prop up a fuse upside down when working on it. The below given is the online Hull speed calculator which you can use it for the boat displacement speed calculation with ease. And large diameter props create more drag, therefore limiting speed. The vast majority of planing hulls have a constant "C" value of 150, or just slightly above. loaded boat will plane more quickly and enjoy better fuel economy. I'm basing my project off a existing ultralight, the LightSport Ultra from Free Bird Innovations. Learn how the pitch and diameter of propellers affect your boat's performance. I will simplify things so you will understand how to see if the brushless motor that you are thinking about is the correct one for your RC vehicle. Nor does it account for propeller inefficiencies. I will note however that the prop adapter doesn't "grab" very much of the motor shaft, so after a couple mild crashes, both of my shafts bent. Produced in 2008, it is a part of Flight Design CT series family. HOW TO SELECT, BALANCE AND CARE FOR RC AIRPLANE PROPELLERS. For example, if you are using an 8x4 prop, the prop diameter is 8 inches and the pitch is 4 inches: for every revolution, the prop would move ahead 4 inches -- at least in theory; pitch-speed does not account for air resistance or slippage. The pitch of a prop tells us the maximum distance a propeller will move a vessel forward through the water. The aircraft is capable of operating from rough, dirt strips and is the prime transport for paradropping troops and equipment into hostile areas. On the other side - a racer (pylon) plane might use 100% all the time. They are handy tools for RC setup and configurations. 99 In Stock. Understanding RC propeller size. Also, the power box muffler does a great job keeping the exhaust note pleasant and the noise level quite low for an engine of this size. You will discover that all props are not created equal. The right size and power. Even in the case of pitch, the larger the pitch the greater the speed. NiCad basics, specs and maintainance. They are engine RPM, prop gear ratio (normally for 1. 42 Comments The motor’s RPM will drop significantly when it’s spinning a prop. Visit OUR Other Websites for Even More Propeller Solutions Bolly Hovercraft, Airboat and Aircraft Propellers Original and Ultra-Prop ll Propellers and Parts.