Coaxial RC Helicopters: How Do They Work?

Coaxial helicopter is one of the more popular images that come to mind when people think about electric RC helicopters. And for good reasons too; these double-bladed helicopters is accredited with bringing hordes of new enthusiast into the world of RC aviation. Their popularity stems from their unequivocal stability in the air – which makes them relatively easier to master when compared to their single rotor counter part. They are also predictable enough to be flown within the compounds of one’s home, securing its spot as one of the most loved indoor fliers. Being able to fly right out of the box because they are sold as RTF (Ready to Fly) kits adds to their appeal.

So where did such stability come from? To answer that, the first step lies in understanding how helicopters work. A single-rotor helicopter generates lift when their rotor rotates. As the main rotor turns, another force will also be generated – known as torque, which will in turn cause the entire fuselage to turn in the opposite direction. Since the days when helicopters were in their nascent stage, their pioneers have learnt to counter this effect by including another smaller perpendicular rotor in the tail. This rotor counters the any rotation generated by the torque as well as provides pilots a mean to control the direction in which the helicopter’s nose is pointing at, more technically known as the yaw. To control the yaw, the pilot simply changes the pitch (or the angle) of the tail rotor.

Coaxial helicopters, on the other hand, eliminate the need of a tail rotor completely. This is due to the fact that these fliers have two rotors, one on top of the other, rotating in opposite directions. In effect, the torque generated by each rotor cancels out one another. When such feat is coupled with two rotors’ lift complementing each other results in the extraordinary stability and hovering ability. Because hovering is one of the main components of a helicopter’s flight, “easier to hover” is almost synonymous to “easier to fly”. Controlling the yaw in this setup becomes only a matter of slowing or speeding up one of the two rotors. Another merit that comes almost as a bonus is that theoretically, these helicopters do not require a gyro – which means that much less tinkering and setting up is needed.

Although very widely praised, coaxial helicopters are not without faults. The first one stems from the fact that in order to fly, the speed of the two rotor blades must be equal. In fact, these helicopters are so dependent on the synchronicity of its blades that even the slightest deviation is detrimental. So much so that these helicopters will just spin wildly on the ground, never to lift off. Their two motors simply have to always be in their most pristine state. Also, the stability of these helicopters comes at the price of sacrificed maneuverability; they are notoriously slow and unresponsive. Nevertheless, perhaps the utmost annoyance comes when the two blades bite into each other in mid air when most extreme cyclic controls are applied.

All in all, coaxial helicopters are here to stay. They have become the favorite beginners’ RC helicopter. At the same time, many experienced pilot enjoy a flight or two of easy indoor flying with these helicopters once in a while.

Note: Although these coaxial helicopters are “relatively” easier to fly than their conventional counterparts, they still require hours of practice. Also, their fast rotating blade can cause just as much injury as bigger model helicopters. Therefore, never treat them like toys.

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5 Steps To Piloting RC Helicopters

Of all the RC crafts available, radio controlled helicopter is arguably the hardest to master. However, with the advent and advances of today’s RC flight simulators, the learning curve have decreased. Now, new RC helicopter pilots can literally crash as often as they want until they can eventually keep their helicopter in the air. Nevertheless, conventional RC helicopter training lessons has not lost their importance. For some, they provide a guide to practicing in the simulator. For others who don’t like simulators – or for some reasons can’t get their hands on one, flying lessons are invaluable. For those that choose to go the no-simulator route, it is generally recommended that you hire a certified instructor. But, with the increasing popularity of cheaper electric RC helicopters, the cost involved with this hobby decreased exponentially. As a result, many new pilots are choosing to learn to fly with neither a simulator nor an instructor. No matter how you choose to learn to pilot RC helicopters, this article which provides classic helicopter lessons will definitely come in handy.

Lesson 1: First Feel of Helicopter / Ground Exercise

First things first, have your helicopter properly trimmed and set up before doing anything. Most electric models are already set up right out of the box. If your model requires any setting, make sure you follow the instruction in the manual or hire/ask someone knowledgeable to do it for you. Trimming won’t be covered in this article because it is a whole topic in itself.

Once your helicopter is trimmed, you’ll need a simple pair of training gear for bigger models. You can actually make one yourself using two four-inch rods and four balls (ping-pong balls will do nicely). However, it may be easier to buy one. If you are learning with a co-axle ready-to-fly electric helicopter such as the Lama or Walkera 54, then the training gear is unnecessary. On the other hand, if you are learning with a bigger and more conventional model such as the T-REX, then having a training gear is absolutely mandatory.

Now, you’re going to pilot your helicopter for the first time. However, for this first lesson, the goal is to learn what it “feels” like to control one. Therefore, what you want to do is to bring up the throttle/collective to the point where the helicopter is just about to lift off the ground but not quite taking to the air yet. With the helicopter in this half on the ground, half wanting to lift off phase, move the cyclic control around and see as well as get a feel of how the helicopter will react to each control. Do this several time until you have adequately felt all of the controls and more importantly, understand them.

Lesson 2: Hover (Tail In)

Once you’ve mastered the ground exercise, the next step is to hover. Every helicopter pilot and instructor will tell you that one of the most (if not the most) important component of a helicopter flight is hovering. In fact, no matter how fancy the flight, at its most fundamental level, a helicopter flight starts and ends with a hover.

For this lesson, make sure the tail is pointing in towards you. Bring up the throttle to the point that the helicopter is just about to hover just as you did in the ground exercise. Then, get the helicopter as stable as you can get it. After doing that, give it a little more throttle/collective. Remember that you should make the helicopter stable on the ground first before giving it the extra throttle to lift it off the ground. Doing this will make this lesson much easier. When the helicopter starts to lift off the ground, it’ll continue to ascend slowly. Bring the throttle down slightly to stabilize it at around 1 foot.

Next comes the hard part. Try to keep the helicopter hovering in one spot. This will prove to be very difficult at first. Draw on what you’ve learnt on from the ground exercise. Once you’ve hovered for around 30 seconds, bring the throttle down just slightly and the helicopter will start to slowly descend back to the ground. Don’t throttle down too fast or your helicopter will come crashing down and be damaged.

Try hovering many times. Between each hover, reflect on what you did right and what you did wrong. You will find that each hover will be more precise and more controlled than the last.

Another important point during this lesson is to always point the tail of the helicopter towards you. Don’t try to point the helicopter in any other direction at this point as you will very likely get disoriented. Orientation training will come later.

Once you’re comfortable with hovering at 1 foot, try bringing the helicopter up to an altitude of 3 to 5 feet. It will seem scarier but in fact, hovering at 3 – 5 feet is easier than hovering at 1 foot. Keep doing this exercise until you can hover for an entire flight of the battery pack or the fuel tank, which equals to around 7 to 10 minutes if you’re practicing on a simulator.

Each pilot takes different amount of time to learn this crucial skill. Some get it extremely fast (within days) while others take weeks or even months. Don’t be discouraged, take your time and learn at your own pace. As long as you have fun while practicing, who cares how long it takes. Don’t rush through this lesson. It is very important that you learn to hover and can do it comfortably.

Lesson 3: Basic Flight

Once you’ve mastered hovering, the next step is basic directional flight. Get your helicopter to hover as you’ve done in the last lesson, then pick a spot and pilot your helicopter there. Then pick another spot and do the same thing. At this point, you want to keep the helicopter in a tail-in position. Keep doing this until you feel comfortable that you can get your helicopter to go anywhere you want while it’s in a tail-in orientation.

Lesson 4: Nose-In Hover

After having mastered hovering and basic flight while flying tail-in, the next step, the nose-in hover, will be relatively more challenging. The idea behind this exercise is quite simple; simply hover like you did lesson 2, but this time, hover with the nose of the helicopter pointed towards you. While this may sound simple, many new pilots find this extremely difficult due to the fact that most of all the controls are now reversed. At this point, you may already confident about flying and feel that you can easily perform this hovering exercise at a high altitude. Please refrain from doing that. Instead, start this exercise by hovering at 1 foot, then slowly increasing the altitude to 5 feet as you are more confident and comfortable with the now-reversed controls. Keep doing this exercise until you can master hovering with the nose pointed towards you. Having accomplished this lesson will greatly improve your orientation awareness.

Lesson 5: Square and Figure 8 Flights

This final lesson will combine the skills you’ve learnt from previous lessons, namely, hovering, orientation, and direction flight. The combination of these skills will produce a full flight. The first goal is to try to navigate your helicopter in a square pattern. If you’ve been following the exercise without cheating, you’ll find that the square flight can be accomplished quite easily. The next goal would be to fly in a figure 8 pattern. This will prove to be more challenging but it is definitely not out of reach. As you do more and more figure eights, concentrate on keeping the 8 a perfect shape. Try your best not to veer off course. Becoming more experienced, you should aim for more and more flight control accuracy. Once you’ve mastered the figure 8, you should be able to pilot your helicopter anywhere you desire. Practice makes perfect, but also remember to have fun; after all, that is the whole point of a hobby.

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Honey Bee King 2 Aerobatic Electric RC Helicopter Review

In the past, the RC helicopter hobby required a substantial amount of money to get started in.

Remote controlled helicopters was a hobby for the wealthy and wow, do they make plenty of noise! The RC helicopters were run on fuel and sounded close to what a chainsaw would. They were heavy, hard to pilot and costs a lot to maintain and fly. Things have changed since then as choppers got cheaper with new technology, lighter and easier to fly. They’ve also gone electric, powered by a Poly Lithium battery, rc helicopters now have long flight times without all the weight. They also come pre-built and that’s great if you’re a beginner not knowing how to build your own RC helicopter.

So what kind of helicopter can I get to start off with you ask?

Introducing the honey bee king 2 helicopter. This is the newest version of the exceptional Esky King remote control helicopter. Honey bee helicopter 2 is now built-in with belt motivated tail rotor system as well as an entirely low mainframe devise including upgraded struts/skids and battery holder.

The honey bee 2 helicopter or Esky 6 CH Honey Bee King 2 has preserved the tried and experienced elements that created the original truly dependable and satisfying to fly. Aside from the latest structural enhancements and belt drive, the Esky have customized the tail arrangement to provide an even greater receptive control.Possibly, this is the most excellent ready-to-soar helicopter you will ever purchase from the toy store.

CCPM is the mainly exact method to manage a cooperative pitch helicopter. The main motor is 23-1/2″ in diameter, with 20-1/2″ general length, and its flying weight is 14.2 oz. Honey bee king 2 is small in size and light weight joined with collective pitch as well as a streak driven tail providing stability and lenience with abundant performance attributes as your skills in piloting progress.

The entire main parts are pre-assembled. Its 120-degree CCPM head utilizes 3 servos to manage the collective pitch as well as the cyclic powers. After you have mastered the hovering movement and deliberate circuits in normal mode, shift to “idle up 1″ and the Honey bee king 2′s high performance motor contains abundant authority for sport flying and upturned flight. Its tail-boom is designed for ideal 90-degree placement of its tail rotor into the central rotor with no modifications.

Esky creates amazing helicopters, and with the latest Honey Bee King 2, it can fly up there together with other high-end models from several more luxurious manufacturers. Have your hands try and navigate this toy and surely you will have a blast.

Great thing about Honey Bee RC helicopters is the sheer availability of spare parts. They’re so easy to buy online these days and the prices are extremely reasonable these days. If you have wanted to try the RC helicopter hobby in the past, there’s no reason for you not to – Well not anymore! Startup prices for mini electric RC helicopters start at $85 and upwards.

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Model Aircraft Piloting Made Easy

Flying model aircrafts rates as one of the most intriguing hobbies. Very few things can compare to the experience of seeing your first RC airplane or helicopter take flight. For non-pilots, seeing someone else fly an RC aircraft is extremely captivating. So captivating that often times it makes you want to learn to fly!

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Then the story starts. You spend hundreds or thousands of dollars to buy your first airplane/helicopter plus a few more hundred for the radio, fuel, batteries, gyros, glow plug, flight box, charger, fuel pumps, engines, starters and a hundred different things that the shop tells you is a must. Just when you thought that the cash spill finally ends, it doesn’t!

New RC pilots quickly learn their first lesson – that it’s hard to fly! So what to do? Easy, get an instructor! Well, this also means more money and a few hours of lesson time. No matter! In for a penny in for a dime! You take those lessons and learn everything you can from the (expensive) instructor. Pretty soon, you can fly “half” the time! Great!

Then eventually the lesson time runs out and you’re on your own. That should be ok, since you are now “half” a pilot – or so you thought. On your next flight, you take the RC airplane / helicopter out and attempt your first solo flight. Suddenly for some reason that you don’t understand, you loose control and crash. Unrelenting, you fix the craft, spent (much) more than a few dollars and hit the flying field again. You finally realize why you crashed last time, and you overcome it. Wonderful! But this time there’s another hurdle, you turn the aircraft in to face you, you get disoriented and then – yup – another crash. You fix it; try again, crash again, and again and again – and yet again. A few months, a dozen crashes and thousands of dollars later you finally learn how to fly! Wow! Great ending!

This story repeats itself over and over with every new pilot. No matter how careful, a new pilot will crash more than a few times as they learn. In doing so, they will have to pay hundreds or thousands of dollars. Sadly, this fact “was” absolutely true – before!

No More!

Nowadays new pilot can learn to fly without having to pay for expensive instructors. Even better, they can crash their aircraft as often as they want without having to spend any money to fix it! How? The answer comes on a CD Rom, the Flight Simulators!

To be fair, RC flight simulators are nothing new. In fact, they were around since the 80s. However, early flight simulators were extremely unrealistic and so expensive that it might be cheaper to actually crash your model a hundred times.

Luckily, competition and technology changed all that. Modern flight simulators’ realism rivals that of the latest computer game – in other words, extraordinary. Some versions come with an exact replica of a real radio controller as a joy stick, others will come with a connector cable that allows learning pilots to plug in their favorite RC controller, really good versions will allow for both options.

The physics engine that come incorporated in these flight simulating are also the very best modern programming technology will allow. Simply put, everything that can and will happen on the real airfield can and will happen in the simulated flight at 99.99% accuracy. And that is not an overstatement.

Price of these RC simulators is dropping too. Really good and well branded simulators costs around $300 dollars. Others that are just as good are available for just under a hundred bucks. The best deals come even cheaper than that, they are free! Don’t think that free RC simulators aren’t up to scratch; they offer features that rival their high priced counterparts. Still, even the most expensive package will pay for itself on the very first simulated crash you make (and you will make lots of them).

So there you have it, the best way to learn to fly an RC model today is to crash, crash, crash, and crash some more until you got it! Of course, do the crashing on a flight simulator where it won’t cost any money.

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