Showing posts with label rc heli. Show all posts
Showing posts with label rc heli. Show all posts

Tuesday, August 26, 2008

Build a remote control helicopter

1.First, you need to decide on which model helicopter you are interested in. Once you have it built youll be ready to start flying no matter which one you decide to build, and for the most part the skill level is the same, so why not pick a chopper that appeals to you?


2.The best way to decide which RC helicopter to buy is to have a look at the different choppers that are available. Read reviews on the different models and types to discover which fly the best and which fly the worst, find out what others like or dislike about certain models. After that, youll be able to make an informed decision and you wont be wondering if you made the right choice.


3.Purchasing your remote control helicopter is just the beginning. Then you will also need to purchase the various parts that you will need like an engine to make it run, the gyro that will control the rotor, the servos and radio controls which is how you will talk to your RC helicopter. The servo is installed in the helicopter and it is where the signals from the remotes are transmitted to.


4.Next, you need to be sure that you have all the tools that you will need to build your helicopter. Nut drivers, ball drivers, screw drivers, pliers, wrenches, fuel filters, glow plugs, pitch gauge, all kinds of nuts and bolts. No matter which kit you buy there always seems to be a screw or two missing, or you loose one while doing the assembly, oh yes, and dont forget those repairs youll have to make after a crash. And you will crash everybody does at first. In fact, its half the fun of learning to fly.


After youve built your remotecontrol helicopter, its almost time to take it for a test flight. Remember, anything that turns must be balanced, your end points need to be equal, and all the bolts need to be tight. If you have a friend thats an experienced RC helicopter pilot, ask them to look over your project to make sure youve got it all right.

Collective Pitch Works on RC Helicopters

RC Helicopter Collective Pitch - Climbing and Descending


When a RC helicopter needs to climb or descend, it uses collective pitch. When the command is given for the helicopter to climb, the servos push the entire swashplate upwards. This has the effect of simultaneously increasing the pitch of all the rotor blades. When the pitch is increased, the rotors grab more air as they move, and so lift produced is increased. This increase in lift occurs evenly, so the helicopter does not turn. When the helicopter needs to descend, the swashplate is lowered in the same way. This will decrease the amount of lift produced from the rotor blades.


RC Helicopter Cyclic Pitch - Attitude Control


Changing
the bank and pitch of the helicopter requires the swashplate to tilt. This is accomplished by tilting the lower disk of the swashplate. When the lower disk is tilted, the upper disk will also tilt, while it is spinning. The main rotors, which are attached to the upper swashplate will also tilt. In order for this to happen however, each rotor must be given time to "fly up", or "fly down" to the location where it needs to be. This is accomplished by using pitch links, which provide each rotor with the information of where it needs to go, before it has to be there. The net effect is that the blades move cyclically, and tilt the motion of each rotor in one direction. The swashplate can be tilted in any direction, so the helicopter can change its pitch and bank in proportion to the commands given by the transmitter.


RC Helicopter Cyclic Collective Pitch Mixing (CCPM)


Model RC helicopters can use more than two servos in combination to control the motion of the swashplate. Software running on the rc transmitter (radio) tells each servo how much to move to achieve the desired motion of the RC helicopter. Each linkage to a servo is represented by a silver rod in the above picture. All of these rods are placed equidistant from each other. A swashplate mix refers to the number of linkages attached. For example: a two linkage swashplate would be controlled by two servo rods, placed 180 degrees apart from each other. A three linkage swashplate would use a 120 degree swash plate mix. The swash plate in the picture above has 6 control rods, and so it would use a 60 degree swash plate mix. Most RC helicopters will use a swashplate with between two or four control rods. The largest RC Helicopters use 4 control rods, because of the extra strength they give the swashplate mechanism.

New RC Helicopter

New RC Helicopter Video Game for the Nintendo Wii Called MiniCopter Adventure Flight。 MiniCopter: Adventure Flight for the Nintendo Wii is a new video game where you control various RC Helicopters. The game is controlled by the Wii remote or a classic controller - your choice. MiniCopter: Adventure Flight has 42 different missions and 7 landscapes making this game a blast for any RC helicopter fan. Your RC helicopters can be modified with various body kits and performance parts to improve performance. A two player mode lets you and a friend race your rc helis in an effort to collect the most rings.


Here are some screen shots from the MiniCopter: Adventure Flight for the Nintendo Wii.


See 117 more screen shots

Monday, August 25, 2008

Fly your RC Helicopter tips

Before You Fly your RC Helicopter


1. Always check / tighten all important screws before you fly rc helicopters.


2. Make sure you have the correct flight mode selected before you fly. If you use a simulator or have different 'birds' this is especially important.


3. If your radio has lots of switches, set it so that when you start all your switches are pointing the same direction.


4. Check your radio's range.


5. Make a checklist and stick to it.


6. Always ensure that your linkages are secure. Sometimes, when making adjustments, one end will unscrew more than the other and is just hanging on by a thread. If it slips off during flight, it could be a very expensive and dangerous lesson. Check them quickly before you spool up.


7. Make sure your receiver and transmitter batteries are fully charged. A dead battery can really wreck havoc in the air.


8. Whenever you start your rc helicopter, whether it's a nitro, gasser or electric, always hold the blade grips tightly. If your throttles not all the way down, or there's a glitch, your heli can spin out of control and cause serious damage.