The unmanned aerial vehicle (uav) is real a hot news now, media editors also in naturally follow suit hype unmanned aerial vehicle (uav). Generally speaking, the news the hype in the two aspects of content: 1, unmanned aerial vehicle (uav) is very cheap, ordinary consumers can buy. 2, unmanned aerial vehicle (uav) is very powerful, it is a legendary weapons, can eliminate the terrorists such as ants.

“I want to fly higher”

The relative height of flight for the performance of the common uav users are not important, for most purposes are fly in low altitude and even “stick”, even aerial couldn’t fly too high, because you can not see the ground clearly when you fly too high. But the flight altitude for the purpose of the plateau region is a very important parameter.
The air in high altitude is thin, on the one hand, it will drop the efficiency of the propeller ; On the other hand, it will drop the efficiency of power system. The fuel power unmanned aerial vehicle (uav) generally use the naturally aspirated two-stroke engine currently , with the air of the thin air intake reduced efficiency, dynamic nature also will drop at the same time, because the boiling point of pressure drop in gas also drops, to a certain height will boil although in normal temperature.

“I want to fly farther than ever”

The majority of users concerned about the uav flight activities of the radius, this is also a important indicator. But flying range can not bigger as you want, there are two aspects restricting the unmanned aerial vehicle (uav) flight radius : mechanical limit radius with radio control of the plane.
Because of Unmanned aerial vehicle (uav) itself limitation of life, its flight radius is limited. Especially electric rotor, the mission flight time is only about 20 minutes, and then consider the time of land and take off, flight control radius is generally at about 1 km.
Some people think of 3g or 4g mobile network can used to implement similar via “star” effect, but it is a pity that even leaving high price of data traffic, there also have a problem on its feasibility. On the one hand, the planar maps for mobile network is the base station of a circle round the honeycomb, junction signal-blind area,it is obvious during flight; On the other hand, from the three-dimensional space, mobile network based on base station signal tower as the center of umbrella cover down, mobile network signal work well in the earth’s surface, even better in the blind area in the air.

“I want to fly longer”

There is no doubt that flight life is a very important index for unmanned aerial vehicle (uav). In many cases, for the mechanical part of unmanned aerial vehicle (uav) itself, the radius of restricting the unmanned aerial vehicle (uav) flight relative height is the most important factor.
normally: no matter for a uav or a man-machine, energy is the main restriction.
For electric uavs, the life of 2200mah lipo battery is even limit. Especially for multiple rotor, due to the response of the motor quickly and easy to control, electric is the ‘Gospel’. But on the other hand electric is an enormous problem that restrict its battery life.
As the carrier of electricity is the 22.2v lipo battery, but the weight of battery is heavy, so the increasing batteries wii not increases the power, but can be seen as a function extremum problems.

“I want to fly no matter rain or shine”

Can uav resist wind?

The resistance of wind for uav is relatively good, because of its low center of gravity and lifting point on the top, even if the wind is big,it also may not be a problem. Windy, of course, the risk will increase , just like if the road is too bad even tanks will afraid of tipping.

Can uav prevent the rain?

Of course not!the electronic equipment of uav, especially of the steering gear, calorific value is big, the better rain-proof the worse heat dissipation. So even the oil helicopters can only fly shortly in the rain,you can fly to return if it rained suddenly but do not try to fly in the rain.

Now it’s very common to see many people like remote control aircraft , and there are more and more newbies start with it.So I’d like to give some ideas and suggestions on flight equipment to you, hope it can do some help.

About the budget

When many people talk about remote control aircraft, they talk about” how far it can fly, how high it can fly, and how much of it……” About these questions, I think how much you could spend on an RC aircraft depends on your economic situation:
In the case of without abundant money, it is recommended that you can DIY an aircraft yourself, and DJI is the best choice for beginners. For example, I can fly with APM open source control system to the average effect of the DJI control system,but it requires strong handling ability and secondary development of software ability. If you think it’s too troublesome, you can choose commercial finished-product flight control system. If you want to be engaged in commercial fly tasks, then the first thing to consider is the reliability when selecting the aircraft, and prices is the second thing.

In the context of current price of the aircraft, if you want to play in entertainment level, then you need to prepare at least ￥5000-5000. Don’t just look at the price of the aircraft, but pay attention to its incidental consumption, such as batteries, etc.

About Choice of Aircraft

First of all,you need to make it clear that fly as a hobbyist or fly for commercial use? If you just fly for entertainment, there are many choices for you. If it is commercial, then the vital point is the reliability of your aircraft.

Compared to helicopter, multirotor is just easier for starting, as for whether you can fly good or not depends on your own.And reliability, there is no 100% completely reliable device, at this point, you need to fly frequently to improve your own skill, maintenance the device regularly, which can effectively minimize the accident probability.
For what multirotor aircraft you should choose, if you are a hobbyist, I suggest to choose quadcopter, it can fly flexibly, take photos and video, it’s good for fun.If you want to make commercial aircraft photography, then you can decide to choose the devide by what camera you will use and the take-off weight.

About Choice of Remote Control Device

A reliable remote control device is one of the guarantees of your safe flight. You can choose the world’s three largest remote control device:Futaba, JR and Sanwa, and these non-mainstream remote control devices Hitec, Graupner are also very reliable.

About Battery and Charger

Now it’s the era of lithium battery, so we don’t talk about the related knowledge about Nicd and NiMH battery at present. Lithium battery is generic terms, the common lithium battery including Lilon battery, 22.2v LiPo battery and LiFe batteries.
It’s very common to see LiPo and LiFe battery in the remote control model. For example, the most popular electric cars-TESLA,equipped with more than 7000 pieces 18650 encapsulated Lilon battery. Our aviation model use LiPo batteries most, which has 4 basic parameters:the battery voltage & how many cells, battery capacity, continuous discharge ratio, and charging ratio.

The battery voltage general use “V” as the basic unit, a single LiPo battery’s voltage is 3.7 V, if it is in series connection, then the total voltage of battery pack=single cell’s voltage * series connection cells amount.The series connection cells use”S” as basic unit,for example:6S means 6 cells in series connection,so total 22.2V.

Battery capacity general use”mAh” as the basic unit, a larger capacity battery,its discharge time will correspondingly increase, but volume and weight also increases.
Continuous discharge ratio is used to describe the maximum discharge capacity of a battery, generally use”C” as the basic unit, then the maximum discharge current, the maximum discharge ratio is related with the battery capacity.The calculate method is: discharge current (A) = battery ratio C X [battery capacity (mAh) / 1000 ], such as a piece of battery’s capacity is 5000 mAh, continuous discharge ratio is 45 C, then the battery maximum discharge current is 225 A.

Somebody said: “A device with 25 C batteries can be normal used, but it will burn the ESC when use 35 C batteries”, this statement is wrong. The system total current depends on the overall system load and fixed consumption, so it has nothing to do with the battery, the battery parameters only describes the discharge capacity of a battery, but not to say that once you connect the battery, then the battery’s maximum current start output. Therefore, choose a battery depends on the the whole system’s requirement, and match the parameters according to the system’s requirement.

On the market, the battery quality and price is various, here I would recommend our hobbyists choose battery with big brands and high reliable like Gens ace 3s lipo, Hyperion and so on. For myself, I use Gens ace & Tattu batteries, who with high performance, excellent quality and terrific after-service. They are worthy of recommendation,more about batteries:http://www.genstattu.com .

Above are the choose of fly device I recommend, I wish you have a good time.

FPV drone racing has become a very popular activitiy recently worldwide.There are many asks about FPV drone racing. Here I will write a article about some things you need to know to start FPV drone racing.

Start Transmitting Video&Video Camera

There are pretty much options for frequency choice but the most popular one for newbies is 5.8Ghz. It easy to get start an have fun without getting into trouble. 5.8Ghz has many nice channels to choose and you can buy a lot of different FPV related items for this frequency.Most FPV cameras available today are primarily from the video surveillance & security industry and work very as well for FPV due to the small size and good low light capabilities.If you are afraid of soldering or getting your wiring well connected then you can buy a all in one unit. These are video cameras with built in FPV transmitters .

Some famous FPV cameres:RunCam 2 Full HD Camera,SONY CMQ1993X HD Camera,etc

Select Your Video Transmitter

There are a lot of video transmitters available on the market today each with its own frequency,antennas and etc.

You should know not more power is better ,too much power can interfere not only with your gear but your friends signal too if you are flying in with friends. I suggest you start with with 25 to 200mW video transmitter.
And you should know FPV video transmitters are not your 2.4Ghz RC transmitter. They can’t frequency hop. You need to set the video transmitter to a channel and make sure the video receiver are in the same channel. If anyone else if flying FPV you have to make sure you aren’t on their channel!

A good antennas is very important

Your FPV system is only as good as your antennas. Most start using what comes with most video transmittersand receivers.a simple omni directional linear polarized whip antenna set which, depending on your frequency, can give very poor performance.

Practice&fly safely

When flying a FPV drone, the pilot sees from the aircraft’s perspective, and even not need to look at the FPV drone. So the FPV aircraft can fly well beyond visual range, it’s only limited by the range of the remote control and video transmitter.
Where is it safe to fly FPV? I would hope that most people would agree it’s dangerous that flying over largely populated areas, busy highways, and other areas of high population density,especially for beginners,you should choose a sparsely populated areas.Parking garages and forests are also perfect venue?for drone racing enthusiasts.So first make sure you get a proper FPV and good place to fly,then take someone with you who’s experieced with FPV racing.Do not attempt to fly 2 miles away from yourself, with headtracking, in high winds, near sunset, on your very first FPV flight! That is of course an exaggeration. However, FPV flying is entirely different than line-of-sight flying. You get a completely different perspective, and during your first flights, it is very easy to become disoriented. it takes practice, practice, practice.

Suggestions

I used voltage alarms on my planes and on my goggles. Losing power is not good and neither is ruining a 2 cell lipo battery.Tattu 1300mah 4s lipo,this is maybe the most popular battery for FPV racing recently.

I suggest you to learn from someone who’s experienced with flying FPV. It will make you learn faster, easier and have more fun.
Fly safely!!This is the first principle!
Have fun!

The DJI new-released M600 brings big breakthrough to the all UAV Area. Not only the A3’s self-adaptive flight systems and new RONIN-MX is , but also the pretty long flight time supported by six smart batteries.

It introduces that a customized battery management system and power distribution board allows all six batteries to be turned on with one button press, and keeps the system in flight in the event of a failure of a single battery, and allows users to check the battery status in real-time during flight.

As we all know, M100 has adopted smart batteries to support the big heavy device for more professional aerial photography and longer time and distance using. Then what are the differences between Smart Battery and Ordinary Battery, why they are more and more widely used in the electronic ndustry?

1. Definition

A smart battery/A smart battery system(SBS) is a rechargeable battery pack equipped with a built-in battery management system. The smart battery can internally measure voltage and current, and deduce charge level and SoH (State of Health) parameters, indicating the state of the cells, calculated and predicted information to its SMBus Host under software control.
A basic SBS including 3parts:System Host,Smart Charger and Smart Battery.

1.1 Advantages

Ordinary Battery

Ordinary Batteries are illusive and do not exhibit visible changes as part of usage from both the user’s and the equipment’s perspective. It looks the same when fully charged or empty, new or old and in need of replacement. A very big defect is that they represent an unpredictable source of power.
Firstly, a user has little knowledge that their battery is about to run out or how much operating time is left.
Secondly, equipment powered by the battery cannot determine if the battery, in its present state, is capable of supplying adequate power for an additional load (such as spinning up a hard disk) or not.

Smart Battery

The Smart Battery presents an ideal solution for many of the issues related to batteries used in portable electronic equipment.

The Smart Battery provides the user with accurate state of charge information along with an accurate prediction of the remaining operating time.

It also Provides state-of-charge and full charge capacity; reflects capacity estimations; records battery history; including cycle count, usage pattern, maintenance requirements, max error, etc; configures charger to the correct algorithm; reminds user of periodic service; protects 2200mah lipo battery from unauthorized use; and to prevent accidental system cut-off.
This is why smart battery is more and more popular and widely used.
An excellent smart battery brand-Tattu plus, also have all these advantages when using on your drones.

1.2 Charger

Ordinary Batteries chargers : It must be individually tailored for use with a specific battery size and chemistry and may cause damage if used on another battery.
Smart Battery Charger: It periodically communicates with a Smart Battery and alters its charging characteristics in response to information provided by the Smart Battery（lipo 3s voltage）.

1.3 Defects

The Smart Battery will add 25% to the cost when compared to a Ordinary Battery.
It complicates the charger, most chargers for intelligent batteries are hybrid and also service for non-intelligent batteries.Requires periodic calibration.

Compared with the Smart Battery’s disadvantages, it has more and valuable features.We believe in the future, people will creat more progressived technology on Smart Battery and overcome the price and other problems step by step.

liHV batteries also called high voltage lipos have been around for years. With a new chemistry composition matrix, these batteries are allowed to be safely charged to 4.35V, and this is higher than the typical nominal voltage of 4.20V lipos. In the world of RC hobbyists, they might want to find every possible way to change and get their models more powerful or longer running time. However, this article aims at knowing the differences, advantages and disadvantages between the standard lipo batteries and LiHV batteries mainly on RC field.

Differences:

LiHV batteries are more than just having higher end volt comparing to standard 14.8v lipo battery. There are less possibility of a puffing liHV. Besides, LiHV batteries have the same performance as standard lipos when they are charged to 4.2V, but higher capacity when they are charged higher than 4.25V. Further more, they do not have the same internal resistance. LiHV has a lower internal resistance compared with the standard one.

Here below is the discharge graph between the single cell of the standard 3s 2200mah Lipo and LiHV battery.

Pros of using a LiHV battery

Obviously, the higher end voltage may give your RC models more power, and the research done by others shows that the capacity of the LiHV battery are also increased, so there are more capacity available for longer runtime. LiHV batteries are lighter than the standard batteries. Further more, the lower internal resistance of the LiHV battery would make more power through the entire discharge. From the discharge gragh, we can see that the whole curve of the LiHV is relatively higher than the standards.

Cons of using a LiHV battery

The requisition of LiHV battery to gain the additional available capacity is relatively more complex. When you are charging these two kinds of batteries with your charger, you have to charge them to 4.2V, then take the “standards” out, set HV to the charger, then initiate another charge cycle to bring the HV packs to full charge. This extra hassle may prove to be more trouble than it’s worth to gain a few extra seconds with each drive/flight. Besides, you may need to buy a new charger for the LiHV. So I would prefer to buy a higher capacity battery instead of charging it. Exceeding 4.2v/cell limit as damage could be done to your receivers, servos or transmitters. From the discharge graph, the stability of the standard lipo is better than the LiHV battery.

In conclusion, although LiHV batteries are relatively better compared with standard lipo in many ways. But for now, I would use lipo batteries and choose higher capacity batteries instead. But What will the future of the batteries be like? Let’s look into the future of the batteries.