Includes 1 normal rotating and 1 counter rotating prop in each package. by - APC-Landing Products - Master Airscrew windsor Propeller - FMS - E-flite - Flyzone - ParkZone - Guillow - Wingtote LLC - Evolution Engines - Hangar 9. These APC propellers are designed for counter-clockwise rotating tractor setups, where an opposite rotating propeller can be desirable to eliminate the torque effects of two propellers spinning in the same direction. Version 1: Movement goes in at. 2008 started his RC showroom. Important to maintain the balance of angular momentum of your drone, such that both types of props are used. Now we need four motors and four propellers. The usual reason for stacked counter-rotating props in aircraft is for compactness and being able to increase the power imparted to the air over the limited area. Step 6: Install propellers. For example, drone users in the US have to notify air traffic control in advance if they plan to fly their devices within 8km of an airport. Contra-rotating propellers are used on torpedos due to the natural torque compensation. 5 BLACK ELECTRIC PROP. This setup allows us to control the yaw of the aircraft by adjusting the differential rotation speed of the propellers. In combination the greatest thrust is produced directly behind the center of the keel. We carry 3 Blade Propellers from popular brands such as Freewing, FMS, E-Flite and Dynam. Looking to find 138x11 Boat? This site focuses on a high quality catalog of 138x11 Boat and much more.



This is the. Several propulsor configurations have been developed aiming at improving the propulsive efficiency. About product and suppliers: Alibaba. How countries counter the drone threat. Important to maintain the balance of angular momentum of your drone, such that both types of props are used. Please note that this listing is for two propellers, 1 CW and 1 CCW. Tandem-rotor helicopters such as the CH-47 Chinook also use a counter-rotating arrangement. The benefits of counter-rotating propellers and rotors are that they can produce up. Let us talk about FPV miniquad propellers! They are actually set of specially designed airfoils that radiates from some strong central hub that bolts into motor or engine of device. What’s in the box? Chroma Drone with stabilized CGO3 4K camera ST-10+ controller with touch-screen display 2 sets of propellers 6300mAh LiPo flight battery. @Push the left joystick to the right-bottom and the right joystick to the left-bottom simultaneously,or push the left joystick upward and then back to the midpoint, the propellers of the drone rotating slowly indicate the drone is ready to fly. Contra-rotating propeller by VICUSdt (CFD) RC - VECTOR KITE 34 - 1 *300cm MANTA birotor vector controlled * 2 counter rotating props 17 videos Play all Contra-rotating Propeller. Counter-rotating propellers generally spin clockwise on the left engine and counter-clockwise on the right. Embodiments of the present disclosure relate to a drone using a coaxial counter-rotating rotor, more particularly, a drone which may have a foldable propeller for easy keeping and which may also minimize damage to the propeller and other components. And the propellers also. Just look at the old props A or B. I first suspected the motor, but then it is clearly the props. Every Day new 3D Models from all over the World. Tern is a tail-sitting “flying wing” aircraft, with twin, counter-rotating, nose-mounted propellers. View and Download Ehang GHOST DRONE advanced manual online.



Shipped in 16 pieces / set standard is 8 red and 8 green Everyones goto crash and burn prop multicopter counter-rotating propeller. High stability. And the propellers also. Can you provide any guidance on how to model a stern-drive with counter-rotating propellers in NavCad? We have never had much success in our efforts to obtain reliable performance and efficiency figures on stern-drive counter-rotating propeller (CRP) units, such as the Volvo Duo-Prop and the Mercrui. Counter-rotating propellers, are found on twin-, and multi-engine, propeller-driven aircraft and have propellers that spin in opposite directions. 12 Counter Rotating 10mm Propellers (ZE8GMLVRQ) by madox on Shapeways. The Suzuki Dual Prop System spreads the propeller load for better efficiency at low speeds, especially when docking or trolling. To keep your drone fly minimumly the upward thrust needs to be greater than the weight of your drone. Aerodynamic performance of the high-altitude propeller, especially the counter rotation effects, is experimentally studied. The DJI Mavic Air drone is a new foldable quadcopter from DJI. I checked all of my Graupner props and they are all this way. Our counter-rotating rotor blades are perfect for use in twin and multiple motor R/C helicopters and RC airplanes. Contra-rotating propellers are one of the most attractive propulsive devices, which can be expected to improve the open water efficiency remarkably by reducing the rotational kinetic energy losses. Use of Unmanned Aircraft Systems in the Arctic Counter-rotating propellers, heated pitot tubes, fuel injected engines, or battery-powered. With the development of UAV design counter-rotating technology has been used in UAV applications. Another aircraft I can think of is the King Air 350. Suzuki Outboard Motor DF350A with counter rotating dual prop system Posted by Dan's Discount Propellers Administrat0r on Jan 27, 2018 in Boat Propellers , Boating | 0 comments Using their own version of the counter rotating dual prop system for boat propellers Suzuki started working on a new outboard motor project over three years ago. 2008 started his RC showroom. Scout Kits; Black EPP 10×4.



Cool pic though! I love modified P-51s. When the propellers are running in contra direction, I am getting an increased thrust of about 2000grams. Maytech 9inch drone motor 2 blade rotating and counter rotating propellers. Electric props are designed for faster more powerful aircraft. That means for a CCW motor, the prop nut is secured by turning clockwise. I actually had the pleasure to also see the work in progress of the game…. With two props rotating the same way the boat will always be turning one way or the other (depends on prop direction which way). When replacing, be sure to match the original propellor spin direction. Wooden props look very realistic, especially if attached to classical aircraft models. A DJI Phantom 3. Note: the drone used in this guide probably looks different from yours! It's just a custom paint job, otherwise it's completely stock. Drone users in the US have to notify air traffic control in advance if they plan to fly their devices within 8km of an airport. On its own, the receiver simply relays the values input into the controller, and as such,. The Counter Rotating Upper Assembly can be used to modify your current belted reduction drive unit by replacing the standard upper assembly on your late model CH-3 drive unit into a Counter Rotating system. Counter-rotating propellers generally spin clockwise on the left engine, and counter-clockwise on the right. We stock a huge selection of RC products from Planes right through to Quadcopters and all accessories.



~~~~~ >> Shape. Visit Us Today. We decided to go the way of a coaxial counter rotating rotors set-up for our propulsion. The engine displaced 10. Contra-Rotating Propellers. Contra-rotating propellers are one of the most attractive propulsive devices, which can be expected to improve the open water efficiency remarkably by reducing the rotational kinetic energy losses. 5" CW CCW Counter Rotating Propellers SIX Glass Fiber Hexcopter Frame 600mm frame SIX Glass Fiber Hexcopter Frame 600mm www. this is a wonderful counter rotating BLDC motor and prop set ideally suited for planes between easystar and skywalker because of small footprint for the power equivalent 30xx size motors. How it Propellers works ? Typically, propellers gives more thrust when they spin faster. [CC BY-SA 4. On general aviation multi engine planes with the engines oriented left to right (or right to left) planes such as the Seminole and later Senecas have counter rotating props (they spin inward) to aid in single engine directional control while planes such as early P-38's had contra rotating props. 99g thrust @3V ) Counter Rotating Propellers - proof of concept v. Dobby Drone Troubleshooting Guide Original Dobby Propellers: don't mix up counter-clockwise and clockwise rotating props. Most drone pilots prefer handheld control, meaning RC systems are still the number one choice for controlling a UAV. The cost of boring out the outer shafts and problems of mounting the inner shaft bearings are not worth pursuing in case of normal ships. 1 Lightweight Stereo Earbuds with Magnetic Connection, Noise Cancellation. Propeller 16x 5030 counter rotating blade - very durable only USD $ 9.



Gents, One thing about this RC airplane hobby is there never ever seems to be a day when something new or bigger or better does not hit the stores. The propellers on quadcopters are often called rotors, rotor is the generic name for any rotating part of a mechanical device whereas propellers are designed to generate thrust. The P-38 had counter-rotating props that produced two critical engines, but the tails falling off was the reason for it. Counter Rotation Props Props spin either clockwise (standard or right-hand rotation) or counter-clockwise (counter or left-hand rotation). Other articles where Counter-rotating propeller is discussed: airplane: Propellers: …controllable (variable) pitch, and eight-blade contrarotating pitch. An upgraded camera and 3-axis gimbal help you capture amazing panoramas and record in 4K resolution. Much like our quadcopter has CW (clockwise) and CCW (counter-clockwise) motors, we have CW and CCW propellers. A quadrocopter is a multicopter with four rotor blades. Here are several options for everything from ND filters to batteries and more:. Rare inflight footage from inside a Russian Tu-95 shows the Bear’s coaxial contra-rotating propellers February 15, 2015 David Cenciotti Military Aviation , Russia , Troubled Areas 15 Fine piece. This has very real implications in determining maximum thrust, best thrust to power ratio for cruising or hover, and determining which props to use for applications ranging from drone delivery to experimental aircraft. PowerTech offers Stainless Steel boat propellers and aluminum boat propellers, boat propellers, boat props, counter-rotating boat propellers, left hand boat propellers, and bass boat propellers. Named for the America spider, it is the first operational U. ~~~~~ >> Shape. Higher KV motors would turn the propeller quicker with less torque, and lower KV motors create higher torque with less rotation. What i'm struggling with now is finding a good supplier for propellers in the UK. If you are ill, disoriented, or unsure of how to effectively fly the drone, please seek help to avoid accidents. Designed for use in multirotors. These models can be identified by the single round LED on the quadcopter read and the battery compartment door on the front.



This truly one of a kind drone uses two counter rotating rotors, and it is a 2nd generation working prototype based off of Ascent’s Sprite drone, which was seen on Kickstarter […]. [Counter-rotating propellers on twin engines] eliminate two problems, which get worse as propeller hub size increases, which is why engines with the 4-1/4-inch propeller hubs don't offer counter-rotation, and those with the 4-3/4-inch prop hubs do. Counter-rotationpropellers are of interest for both pusher and tractor configurations because of their potential for higher efficiency due to recov­ ery of the energy lost to slipstream swirl. Shoulder-mounted ‘guns’. Yuneec Typhoon H Propeller / Rotor Blade B (Counter-Clockwise)-Yuneec Typhoon H OEM Replacement Propeller / Rotor Blade B, Counter-Clockwise Rotation, 3 blades per set. The Inspire 1 used to be a revelation. High stability. Buy your Blade Propellers Counter-Clockwise Rotation Green nQX (BLH7621G) at RC Planet and save on all our Blade parts and accessories. The DJI 9450 Self-Tightening Propeller Set for Phantom 2/Phantom 2 Vision+ is a set of two 9" propellers for the DJI Phantom 2 or Phantom 2 Vision+ quadcopter. If you print this Thing and display it in public proudly give attribution by printing and displaying this tag. In combination the greatest thrust is produced directly behind the center of the keel. How-loadedinrelationtotoday'sthreeandfour ever, despite repeated attemptsto apply •' bladedpropellersdesignedfor lowerfligh+ counter rotation, such propellers have. The red or white wire is the positive one and the black one is negative. Be the first to review this product. Much like our quadcopter has CW (clockwise) and CCW (counter-clockwise) motors, we have CW and CCW propellers.



Lipo Rechargeable Battery for RC Drone. for fast forward flight though i've found having the top right props rotate clockwise and the top left props rotate counter clockwise with the bottoms doing the opposite works best for having everything stay stable when transitioning. (two inline props rotating opposite directions) Counter-rotating props are only on multi-engine aircraft like the A400M where parallel props rotate in opposite directions. COMPARISON OF COUNTER - ROTATING AND TRADITIONAL AXIAL AIRCRAFT LOW-PRESSURE TURBINES INTEGRAL AND DETAILED PERFORMANCES Leonid Moroz, Petr Pagur, Yuri Govorushchenko, Kirill Grebennik SoftInWay Inc. It is also used in some motor boats. Sport propellers are intended for use with internal combustion engines. EAGLE classifies the specific radar signature from drones, like fast rotating propellers and provides real-time information on speed, range, direction and more. A set of propellers consists of four and is made up of 2 clockwise (CW) rotating props and 2 counter-clockwise (CCW) rotating props. Keep clear of spining parts. 5" CW (Clockwise / Yellow)1 x 7x4. Common propellers have specific rotating direction, It’s clockwise and counter clockwise. Contra-rotating propellers are common in some marine transmission systems, in particular for. The stock propellors and other parts of the Dobby Drone do a fine job. one prop per engine for most but there are a few planes with two counter rotating props per engine - the two props counter each others force (torque) to keep the props of powerful engines from. How A Quadcopter Works With Propellers And Motors Explained Posted August 24, 2018 by Fintan Corrigan Understanding drone motor and propeller direction, along with design show us how a quadcopter works. DRONE PROPELLER - Allan is the RC-plane distributor since year 2000. When replacing, be sure to match the original propellor spin direction. Buy your Blade Propellers Counter-Clockwise Rotation Green nQX (BLH7621G) at RC Planet and save on all our Blade parts and accessories. They typically have an X- or H-shaped frame and are lifted by 4 rotors.



It is unusual (although not unknown) that you have the rotation that you have. Multicopters often use fixed-pitch propellers, so the control of vehicle motion is achieved by varying the relative speed of each motor. Thirteen vigilant years later I purchased a tired, semi-complete O-15-1 carcass out of a museum and restored it to running condition. This is a package of two 9. The Tern Phase 3 design envisions a tailsitting, flying-wing aircraft with twin counter-rotating, nose-mounted propellers. With our patented and patent pending counter-rotating motor designs, we are proud to be adding to the advancement of UAV technology. GWSEP7035X3R GWS COUNTER ROTATING 3BLADE 7X3. Contra-rotating propellers should not be confused with counter-rotating propellers, a term which describes non-coaxial propellers on separate shafts; one turning clockwise and the other counter-clockwise. The drone pitch, defined as the ratio of drone diameter to rotor diameter, is the same for all multirotor configurations and is valued at 2. Every Day new 3D Models from all over the World. Use of contra-rotating propellers recovers energy lost due to the motion of the air in the slipstream of the forward propeller and allows for an increase in power without a corresponding increase in propeller diameter. Basically CW (clockwise) and CCW (counter clockwise) motors are still the same motors, apart from the prop shaft threads which have opposite direction. As a result of their construction, the propeller blades are like airfoils and produce forces that create the thrust to pull, or push, the airplane through the air. Drone Motor Direction And Propeller Design. A wing has nearly the same angle of attack across its entire length. The experience of CR Flight's™ founders span decades of business, product development and design innovation. Dynam P-61 1500mm Black Widow Twin engine - PNP.



A set of 2 x 1045 Propellers. Most single engines use a standard rotation. This unique counter rotating propeller gearbox is designed to fit for Rotax 503 and Rotax 582 engines, not for 912 or any other brands engine. 2 by Krest Aug 10, 2015. Influences of different configurations on a stratospheric airship, included 2-blade counter-rotating propeller (CRP), dual 2-blade single rotation propellers (SRPs) and 4-blade SRP, are also indicated. Wood Propellers - Counter Rotating,Wood Propellers - Counter Rotating,Airplanes, Page 5,HiModel RC hobby supplier, exporter and wholesaler. Another advantage is that the torque is pretty much cancelled out by the contra-rotating prop, but this is much less of an issue in aircraft with an engine configuration like the Tu-95 in your post. Turn on the controller. Whether you’re a drone newbie, an intermediate or an advanced flyer, this drone buying guide will show you the best quadcopters to buy in 2019!. 7 V and it has high rpm. GEMFAN 5030 / 5 x 3" 3-blade Counter Rotating Propellers - Black (2pcs) Size: 5x 3 inch Material: Nylon Weight: 6. Turn on the XDrone by turning the ON/OFF switch at the bottom of the XDrone. The company intends the Flitting-Sensor to be used for security and surveillance as well as civilian purposes such as inspection and monitoring. LHI Official Store has All Kinds of LHI Diy qav250 quadcopter frame kit flight controller zmr250 qav 250 carbon fiber with camera drone accessories quadrocopter,LHI RC drone frames 220 Quadcopter Full Carbon Frame Kit+DX2205 2300KV Brushless Motor+ Littlebee 20A Mini ESC+5045 propellers,2018 Hot Sale Qav250 Carbon Fiber Qav 250 Frame Battery Motors Tamiya Hsp Fpv Quadcopter Brushless Camera. DJI Phantom 1 & FC40 setup – Getting Started Guide.



4G 6CH RC Quadcopter ARF Combo Full Set Drone with GPS APM2. AG-9030-PH - T-MOTOR 9 X 3. This is a package of 2 matched propellers, 1 left hand. Richter Aircraft drone engine 2-GS-17 Counter rotating props. Yuneec Typhoon H Propeller / Rotor Blade B (Counter-Clockwise)-Yuneec Typhoon H OEM Replacement Propeller / Rotor Blade B, Counter-Clockwise Rotation, 3 blades per set. one prop per engine for most but there are a few planes with two counter rotating props per engine - the two props counter each others force (torque) to keep the props of powerful engines from. We know that our counter-rotating motor will be a game changer for the industry. 3 Motors The propellers are connected directly to a brushless DC motor which spins the propellers at a speed determined by a speed controller. the mounting would be bit tricky though. In order restrict the body of the airflow to the centre of the aircraft, we design a shrouded propeller system as the air intake. The benefits of counter-rotating propellers and rotors are that they can produce up. When power is applied to the motors, the propellers spin at a high rate of speed. Counter-rotationpropellers are of interest for both pusher and tractor configurations because of their potential for higher efficiency due to recov­ ery of the energy lost to slipstream swirl. The prop shafts rotated in opposite directions and the propellers were locked in phase 90° to each other. 12 Counter-Rotating Type Power Technologies to Exploit Offshore Energies. UNDERSTANDING THE DRONE PROPELLERS 2.



Version 1: Movement goes in at. Esky's RAH-66 Micro Electric 4-Channel Counter-Rotating Radio Remote Controlled RC Helicopter RTF - Yellow Desert Storm Paint EskyHeli_E035A-Comanche-Yellow. white chickpeas dipping, white chickpeas rotating machines, shelled peanuts production line, shelled peanuts automatic salting, shelled peanuts manual salting, shelled peanuts rotating machines, coffee production line, coffee roasting oven, coffee rotatin. we have specifically chosen these blade to work with our own 250 build mini H quad. 1 About the Propellers Pictures of the co-rotating and counter-rotating propellers. The Airscooter: a helicopter for the home? on the same axis rotating in opposite directions to each other. Yaw get controlled by moving the left stick horizontally. Not yet, but soon. Michigan Nibral. Low voltage protection that the propeller will stop rotating when bumps to obstacles, thus could better protect the drone. The pursuit of power was sought in improving engine technology and ultimately led to the development of the j. DJI’s Spark drone is an exquisitely-built, incredibly easy-to-fly drone, but 16 minutes of flight time is not enough, especially when the reality is more like 10 to 12 minutes. WASHINGTON (Reuters) - Northrop Grumman Corp has won a contract worth $93. Comes in both Clockwise (CW) and Counter Clockwise (CCW). Includes 1 normal rotating and 1 counter rotating prop in each package.



Contra-rotating propeller by VICUSdt (CFD) RC - VECTOR KITE 34 - 1 *300cm MANTA birotor vector controlled * 2 counter rotating props 17 videos Play all Contra-rotating Propeller. in stock A new series of propellers specially designed for electric power systems. On a quad-copter, given that the propeller rarely has that much forward speed, it is better to use a slow flyer, but I have used both electric and slow flyer props with success. The motor size that you need to choose is largely dictated by the size of your drone or quadcopter. The blade angle on fixed-pitch propellers is set for only one flight regime, and this restriction limits their performance. Counter rotating props means that the prop walk created by either engine are cancelled out, and the boat will track better. 2 gallons of fuel and had level flight speed of 85mph. The company intends the Flitting-Sensor to be used for security and surveillance as well as civilian purposes such as inspection and monitoring. However, most experts I talk with tell me that counter rotating props on RC aircraft just do not exist. How to Choosing Propellers for your quadcopter? RC FPV Drone December 22, 2016 September 28, 2017 DIY Drone , How to 4 When you are build a quadcopter, propellers are the same important to the motors and lipo battery. In spite of the fact that the motor drives the counter-rotating propellers via a planetary reduction gear (for optimal low-speed operation) both the motor and the transmission are mechanically insulated from the frame by rubber mounts. The direction of rotation is viewed from the rear as they do in full size aircraft. Michigan Nibral Props Propellers 14 X 14 Left And Right Hand Pair. By Oscar Liang. Main thing to define a contra-rotating system (in my opinion) is the lack of torque due to two inverted propellers / same axis. A counter drone device adapted to render propellers of drones inoperable. 5" (3-Rotor) EPP7045 Counter Rotating Propellers (FC Model / Pair / Blue) 7x4. 5 BLACK ELECTRIC PROP. 7 V and it has high rpm.



in stock A new series of propellers specially designed for electric power systems. The prop in the pic is correct and so is the packaging. For example we will use (let's open a model of air proppeller and set parameters): a three-bladed propeller, (tab3: optimize). Position a blade pointing straight up. Not sure what is wrong with it, but the motor is not seized, Call, email, or text- Can provide more pictures of anything you'd like. The concept lets inboard-boat builders take advantage of contra-rotating propellers; the most obvious advantage is improved efficiency. Counter rotating propellers increase fuel efficiency but increase the amount of noise produced. The emergency prompted the government to deploy Royal Air Force (RAF) personnel, equipped with Rafael Drone Dome communications-jamming technology acquired for the British Army earlier in the year, to provide counter-UAV coverage at Gatwick. Once you turn the Mavic 360 degrees horizontally, the light will turn green and It will ask you to do the same thing vertically. 15:100612) by David A. Without changing the horizontal position, start rotating the quad rotor counterclockwise until the red LEDs start flashing frequently. New one does the same thing- checked left and right props are on the right motors- and checked motor rotation. Welcome to Graves RC Hobbies - your online hobby store and one-stop shop for remote controlled airplanes, helicopters, boats, cars and much more. When installed the CCW rotating props will be on opposite sides and opposite ends. If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.



B-17s didn't have counter-rotating props, they were all right-hand rotation. Even, with props rotating in the same direction, the lower must have a higher pitch because it is working with higher inflow velocity (usually about 1" greater pitch). Several propulsor configurations have been developed aiming at improving the propulsive efficiency. 5" CW CCW Counter Rotating Propellers SIX Glass Fiber Hexcopter Frame 600mm frame SIX Glass Fiber Hexcopter Frame 600mm www. Propeller pitch. At RobotShop, you will find everything about robotics. An Experimental Study on the Aerodynamics and Aeroacoustic Characteristics of Small Propellers of UAV Zhe Ning1, Hui Hu2( ) Department of Aerospace Engineering, Iowa State University, Ames, Iowa, 50011 A preliminary experimental study was carried out to investigate the aerodynamics and aeroacoustic characteristics of small propellers. The counter-rotating propeller system is what allows the drone to generate approximately 10kg of thrust while restricting unwanted yawing motion. Named for the America spider, it is the first operational U. Possible problems. A quadcopter has four propellers, two “normal” propellers that spin counter-clockwise, and two “pusher” propellers that spin clockwise. Operation When airspeed is low, the mass of the air flowing through the propeller disk ( thrust ) causes a significant amount of tangential or rotational air flow to be created by the spinning blades. Because of Hummingbird’s very high power/weight ratio and counter-rotating propllers, it is not necessary that the duct be heavily optimized for static thrust. The prototype was completed June, 1941. Propellers in twin-engine boats are set to turn in opposite directions so that the torque created by each balances the other out. Tern is a tail-sitting “flying wing” aircraft, with twin, counter-rotating, nose-mounted propellers.



If this icon is missing or you can't read it, you can determine the direction of rotation by examining the propellor. With our patented and patent pending counter-rotating motor designs, we are proud to be adding to the advancement of UAV technology. CR Flight ™ partners with established industry leaders to design, patent, license, manufacture and provide the industry's only patented counter-rotating motors to UAV/drone commercial and consumer manufacturers and wholesale distributors. The unique shape and design of the high-speed propeller allows airplanes to fly at speeds close to that of airplanes with jet engines. Note: the drone used in this guide probably looks different from yours! It's just a custom paint job, otherwise it's completely stock. Unless you’re a wild pilot, at most you should keep one full extra set on hand. Extensive range of R/C propellers for racing, DIY models, professional and consumer drone upgrades for DJI, 3DR and GoPro UAVs. A wing has nearly the same angle of attack across its entire length. VB-10 was a bad plane in the opinion of the french test pilot. -Distance from prop A to prop B -Speed of prop A of prop B. In other words, one set of like props will be on the right front and the left rear and the other set will be on the left front and right rear. First things first - bin the supplied props, way out of balance. By choosing two counter-rotating rotors, we have in effect been able to get rid of the anti-torque, which makse the drone much more compact (circular). The Russian Bear bomber comes to mind. Best propeller is a main part of a drone. KingKong 5045 2-Blade Propellers Red (CW/CCW) (10 Pairs) w/Self-tightening Prop Adapt (AR Warehouse) Counter Rotating (EU Warehouse) 481 g. 2447 "propellers" 3D Models. Thirteen vigilant years later I purchased a tired, semi-complete O-15-1 carcass out of a museum and restored it to running condition. Counter Rotating Propellers Drone.