Radio

AICase Cheerson CX-10 29mm 4 Channel 2.4GHz Radio Control RC Mini Quadcopter Helicopter Drone 6-Axis Gyro UFO with LED Flash Light (Green)

AICase Cheerson CX-10 29mm 4 Channel 2.4GHz Radio Control RC Mini Quadcopter Helicopter Drone 6-Axis Gyro UFO with LED Flash Light (Green)

  • Safe and Controlled Flying: 2.4G 4CH 6-Axis Gyro system enables stable and flexible flight; the Li-polymer battery comes equipped with a protective board to auto power off in the event of a collision, preventing damage
  • Miniature with Colorful LED: the bright LED works beautifully for night flying while the size makes it perfect for small spaces
  • Equipped with 3 speed modes, low, medium and fast. This allows you to fly, for instance, in a small spaces with low speed and maximum control or in more spacious areas with a very fast speed.
  • Easy to Maneuver: Up/Down, Left/Right, Forward/Backward, Left/Right Sideward Flying, Hover, 3D 360 Eversion, Support Flying Speed Control and Hand Launch, Low Battery Warning for the Transmitter
  • Air Tumbling Skills – When player is familiar with the basis movement, they can control it for thrilling tumbling

Features:
1. Model: CX10
2. Main Rotor Diameter: 2.9cm
3. Speed Control: Integrated
4. Required Radio: 4 Channel
5. Frequency: 2.4GHz
6. Flight Time: Approx. 4-8 minutes
7. Charging Time: About 30-40 minutes
8. Battery: Rechargeable 3.7V 100mAh Lithium Battery
9. Transmitter Battery: 2 x 1.5V AAA Batteries (Not Included)
10. Control Distance: About 40 meters
11. Body Material: ABS Plastic
12. Color: As picture show
13. Dimensions: (

List Price: $ 29.99

Price: $ 59.99

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Dromida Ominus First-Person View (FPV) Unmanned Aerial Vehicle (UAV) Quadcopter Ready-to-Fly (RTF) Drone with Radio System, Batteries and USB Charger (Red)

Dromida Ominus First-Person View (FPV) Unmanned Aerial Vehicle (UAV) Quadcopter Ready-to-Fly (RTF) Drone with Radio System, Batteries and USB Charger (Red)

  • The Ominus FPV comes ready to fly out of the box. Perform flips, take video, and snap photos with the press of a button.
  • Four flight modes to help any pilot take flight. Choose between easy, normal, advanced and expert flight modes.
  • See your flight through a Wi-Fi-enabled digital camera and operate it with your own smartphone or other mobile device (not included).
  • Flies 10-12 minutes on a fully charged pack and recharges from any handy USB port.
  • Includes fully assembled quadcopter, radio, HD camera, micro memory card & reader, smartphone holder, extra blades, batteries, and charger.

See flight from an FPV point of view!With the Ominus FPV, you don’t need to buy a separate viewscreen or expensive headset. Simply download the FPVCam app (free from the Apple App Store, or Google Play), put your smartphone into the holder, and you have a sharply focused, first-person view of your flight. The Ominus includes a micro memory card and card reader, but you can also download photos and videos directly to your smartphone for sharing with friends or posting to your favorite social medi

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Propellers are one of the key elements of a fast radio controlled boat, but few boaters could tell you much about how they work, or how to choose the best one and optimize its power. Once you have this knowledge, you’ll be able to maximize your boat’s speed without damaging your motor.

Pitch vs. Slippage

Propellers are sometimes compared to a screw, but there is one significant difference. The “pitch” of a screw is measured by how many rotations it takes to go in one inch. This is the same as the number of threads per inch. So, a screw with a pitch of 12 threads per inch will require 12 full turns to go in one inch.

Propellers aren’t quite as efficient because they “slip” a bit pushing through the water. A prop with a 2 inch pitch would theoretically move the boat forward 2 inches for every revolution, but because of slippage moves somewhat less than that. The amount of slippage depends on the design of the prop, the motor that drives it and the speed of the boat. A light hydro boat moving at top speed might have a slippage of only 10% or so, but most boats will fall into the range of 20-30%.

Diameter and Pitch

The diameter of a prop is measured from tip to tip of the blades. The larger the diameter, the more water it can push. A larger prop also needs a larger motor to power it, or else a gear drive that will apply sufficient thrust without overheating the smaller motor.

The diameter and pitch of the prop are the two numbers you’ll need to know in order to choose the best prop for your boat.

Choosing the Best Prop

If you buy a kit or ready-to-run boat, it will most likely come with an inexpensive, low performing motor and a prop that will give a long run time with low amp draw. The reason the manufacturers do this is so beginners can have fun right away with a minimum amount of frustration. More advanced boaters can upgrade the same model with more powerful motors and propellers.

Once you’re ready to upgrade your fast electric boat, first try a prop with a slightly larger pitch, then one with a larger diameter. Run the boat at top speed for one minute and then feel the motor. If it’s too hot to touch, the prop is too big, so try a smaller diameter or pitch.

If you’ve tried to upgrade your boat’s speed with a hot new motor, you should also change the prop, which was matched to the stock motor. The new motor will draw more amps at lower RPMs than the stock motor, so you’ll probably need to put on a smaller prop to keep the new engine from overheating. The smaller prop will allow the new motor to obtain higher RPMs and thus higher speeds for your radio controlled boat.

Another design factor that affects your choice of prop is its lifting ability. Two props with identical diameter and pitch may have their blades shaped differently. A lifting prop could be useful on a hydro to get its transom out of the water, thereby reducing drag and increasing speed.

Prop Materials

The three most common materials for fast electric boat props are plastic, aluminum, or beryllium copper.

The best plastic props usually have graphite fibers embedded as a stiffener. These props usually come well-balanced and are inexpensive.

Aluminum props are light with little flex. The rarely require balancing and are easy to polish. However, they can crack if bent too far and cost the same as props made of harder materials. Aluminum is too soft to hold a sharp edge, which is necessary for top performance.

Props made of beryllium copper and similar hard materials are the choice of most serious boaters and most records are held by boats using this material. They can be sharpened to a razor’s edge and polished until they gleam, but they will require balancing.

Balancing Propellers

Props made from light materials like plastic and aluminum rarely cause vibrations at high RPMs, so they’re rarely out of balance. However, heavier blades made from beryllium or bronze turning at 20,000 RPMs or more can produce enough vibration to interfere with radio transmissions and can even crack the hull. To avoid these problems, high performance props need to be properly balanced.

You can make a balancer with scrap wood and razor blades, but if you do a lot, you be better off buying one designed for boat props. Some balancers designed for airplane props aren’t sensitive enough for the smaller props used in radio controlled boats.

To balance a prop, place the axle on the razors and see which propeller blade drops to the bottom. This is the heavier end and needs to have some material removed to lighten it. Using a metal file, start at the leading edge and remove material from the side of the prop that faces the bow. Check the balance often and stop when the prop rotates very little when placed on the balancer.

Be sure to use goggles and a good respirator when filing a beryllium prop to keep the poisonous metal particles out of your eyes and lungs. Use 100-grit wet-or-dry emery paper to remove the file scratches. Then finish with a 400-grit paper.

Once you’ve put this much work into modifying your props for maximum performance, you’ll want to take good care of them. A plastic box for storing fishing flies works well for this.

Upgrading your boat’s performance by choosing and balancing the propeller is a matter of some trial and error, but is definitely worth it. Have fun!

Les Goss has developed a unique web site to inform and instruct beginners in the sport of radio controlled boating. You can also find a great selection of boats for yourself or as gifts. Always on sale and free shipping. Check out more helpful articles at http://RadioControlledBoatsHub.com/articles.php

While shopping for mobile radio antennas you will need to know more about them to ensure you buy the best antenna for your needs. You will want to make sure that you get the best antenna that is going to give you the sound, clarity, and the distance you are seeking in your radio antennas. With many products, the more money you spend, the better product you will get, but that is not always true when it comes to mobile radio antennas. There is not much to know about them, but still necessary to make the right decision.

Radio antennas can be purchased for $ 20.00 or $ 1200.00. This is why it is necessary to understand what you are buying, before you buy it. Some people that are handy will make their own antenna, but the manufactured antennas are just as easy to mount and maintain. If you do chose to make your own mobile radio antenna, make sure you test it with a SWR meter when you are done building it. It is essential to make sure you are getting what you think you are getting, and with a SWR meter you can be sure.

On all mobile radio antennas, the longer the cb whip is, the better the clarity and range of the antenna. Most people will pick the longest antenna possible, and mount it as high as possible. This will help to strengthen your range and clarity. After purchasing your antenna, you may want to try it in different positions before you mount it permanently.

Once you do purchase your antenna, where to mount it onto your car is important as well. If you are in the US and the driver’s side of the car is on the left you will want to mount the radio antennas on the left. There is normally more clearance in the center of the street, even when going under bridges. You will want to make sure your radio antenna has enough clearance. Always mount your antenna on the driver’s side of the car.

It is best to permanently install your radio antennas to the roof of your car. The roof will add additional height to your antenna, giving you even more range. This will maximize your performance, minimizing ground and shunt capacitance losses. If you do not permanently install your mobile antenna by drilling holes and mounting it to your car, the magnet ones will collect debris, as well as slide off or slide around scratching your car. A magnetic antenna can do a lot of damage to your car’s paint. Holes drilled for a permanent mounted antenna can easily be plugged. Some insurance companies will cover your antenna if they are permanently mounted.

When purchasing mobile radio antennas always remember the longer the whip on the end of the antenna, the better your reception and the further away you will be able to hear and reach out to. Also remember to know how you will mount the antenna you purchase. Consider whether or not you will drill holes to mount your antenna or you will take the chance of destroying the pain on your car if it should slip off. These are all the different things you will want to take into consideration when you purchasing mobile radio antennas.

The Mobile Radio Store provides a range of mobile radio antennas and accessories. Whether you are traveling over the road in your car, truck, RV, or motorcycle, or skimming over the waves in your boat or watercraft, The Mobile Radio Store is a trusted source for your mobile communication needs.

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