How helicopters work |
| Posted: 21 Apr 2011 08:41 AM PDT Helicopters are more maneuverable than airplanes or other small aircraft. During a plane can only go forward, a helicopter can hover the page, move from side to 360 degrees and even fly backwards. These skills make it extremely versatile helicopters incredible. They are used as a rescue vehicle, military vehicles and police forces and means of surveillance. To explain how a helicopter is in the air, it helps to understand how a planWing works. The wing of a plane is wide at the front and tapering to a point in the back. This shape forces air under the wing as the plane moves forward, what to lift the vehicle. A helicopter blades are tapered like an airplane wing. A plane must move forward to maintain lift. A helicopter can maintain their "wings" or blades in continuous motion. These endless air forces under them and lift increases, even if the airplane is around the place. It does so with a twisting motion. Two or more sheets are attached to a central shaft, which rotates like a fan. This building is located on the roof of the vehicle, and is called the main rotor shaft. If you have never seen a helicopter, you've probably noticed that there is another, smaller propeller at the stern. This is the tail rotor. To increase fast enough to reach the main rotor spinning, you need the most powerful engine helicopters. If the> Helicopter above the ground, the force of the motor rotor rotates the body of the helicopter along with the principal. The tail rotor drive the rear of the vehicle to the side, does not occur. It provides a resistance force that the body still keep turning the rotor blades. To fly a helicopter, was walking with two hands and two. A hand control lever as a "cyclical", the helicopter left, right, forward and backward. The other handuses the "collective". This controls the up and down motion of the trades and the speed of the engine. Both feet rest on its axis pedals that control the tail rotor of helicopter, spinning can. The controls of the main rotor lift, direction and movement from side to side of the vehicle. The machine in the rotor can change the angle of all blades at the same time, the amount of lift so the boat up and down at different speeds.In addition, the angle of the rotor blades to be adjusted individually. This controls the horizontal movement of the helicopter, including forward, backward, left and right. The tail rotor, the helicopter can rotate in a circle. Changing the angle of the rotor blades, the helicopter can circle around its axis in a complete or partial will. Hovering is one of the most difficult maneuvers of a helicopter can do. To float must pilot the use of cyclic to keep the helicopter in an above ground, the use of a certain collective levels, and use the pedals to keep helicopters in the right direction. wind conditions can float difficult and dangerous, but it is a very useful skill. Hovering helicopter pilots often for long periods in rescue operations, military maneuvers and the duties of police. MilitaryHelicopters> have a slightly different design civil helicopters. Apache helicopters, for example, have leaves coated in titanium and graphite composite. pilots of military helicopters often fly low to the ground to prevent attacks on surface air missile, and the leaves are ruggedly constructed to withstand the obstacles to meeting branches of trees, power lines, and others. Apaches are equipped with missiles, weapons, sensors and weapons. BlackHawk helicopters are specially equipped. Because they are often used to transport equipment in war zones, are equipped with two detachable stub wings on both sides of the hull designed appropriately. Each is built with a pier that can accommodate up to 9,000 pounds. Black Hawk helicopters also have a hook on the frame, you can then fly to protect the large load, the helicopter dangling below. Black Hawks are also a function of autopilotstabilization of recording automatically. Helicopters are perhaps the most versatile aircraft ever invented. With their incredible flight characteristics, which can perform the maneuvers of aircraft can not do anything else -. The helicopters are truly remarkable and are used to transport equipment to perform important military maneuvers, and save every day lives. If you've never done a ride in one, you know, is an unforgettable experience. |
| Space Derby – Just like a Cub Scout Fun Activity Win Posted: 17 Apr 2011 11:40 AM PDT Last Saturday, my 8 year old son took his first Derby with his Cub Scout Pack Space Many young parents, brothers and Cub Scout leader showed up for the event. What is a Space Derby? Well, it's probably a little 'different than you think. Each Cub Scout Space Derby will receive a kit with their Cub Scout pack. The kit includes balsa wood, that take advantage of each participant to form the body of a rocket. There are also plastic in the kit, which can be cutFashion fins for the rocket. Here is where it starts to sound a bit 'weird. There is also a propeller in the kit. A propeller? I thought it was a rocket? Well, actually it's like a rocket, but the real driving force of the rocket. The scouts race their four rockets at once. The missiles hanging from a horizontal wire and the propellers are powered by a rubber band that comes with the kit with the power. Missiles are classified into three categories, speed, beauty andOriginality. It soon becomes clear that the main thing that makes her a rocket "weight fast. Since all guided missiles are the same and hurt the same, the lighter the rocket, the faster the job. However, if you do your light rocket, you risk structural failure, if the tires are wound. So there's a balancing act to have a light but strong missile to have a fast. My son and I decided to go for the beauty category, since this was his firstDerby. We wanted an idea, as another missile in terms of speed performs better this time to come. We followed the instructions of the set and start gluing the two halves of balsa wood. Later we used very natural to start the sand paper, the shape of our race. Later I found out from some of the other parents that a vegetable peeler works wonders for shaving wood from the body in rough shape of the rocket to get. Neither this early information, we have the sand paper. Once we have obtainedthe basic shape we wanted, we have finer sandpaper. We changed to 400 sandpaper, then finally the 800th Subsequently, the rocket sprayed with primer. Once the primer dried, we sanded thoroughly with sandpaper 800. Then we have another layer of primer and sanded again. We continued this process until the rocket body was smooth enough to give us satisfaction. I have a friend, I should have said loop primers used. He says it would be between the cracks of balsa wood or stuffed with atwo layers. I take his word. I used regular spray paint primer … the cheap stuff. After we finished priming and sanding, we sprayed a coat of Candy Apple Red on the body. When spray painting, there are a few tips to make a big difference how do you look like your finished model. spray paint in a well ventilated area. It 'important to keep the spray the right distance from your model … about 6 inches is usually recommended. If you can alsoclose the paint runs they, too far and your painting is an orange-peel (rough and matt will) have. Continue to move the can when spraying … Once again, a lot of time in a place in runs and carry a not-so-great finish. If you spray paint your rocket, you can fashion a body bar made from a coat hanger. This prevents you from getting all the coats of spray paint, and before that lost the fingerprints on your new coat of paint. Be careful, asafe place, at the end of your crutch, keeping your fresh paint to touch anything until it dries. Sufficient time for the paint to dry (30 minutes) before a second layer or (2 to 4 hours) before they hit the rocket body, depending on the humidity. Once the first layer is dry, we have a second coat of Candy Apple Red Chrome We painted the wings and propeller after the initiation of them. Since they are not very practical, all the stickers, I had to take silver and black sharpiesFlashes on the address labels. Then I cut the bolts and glued them on the rocket body. My wife uses a fine tip black marker to Capt. Justin Rodgers a missile, "adding tail fins. Justin Rocket won first place in the category Beauty. And 'well in terms of speed, but there are definitely lighter than a rocket next year. I hope you find some useful tips in this article to build your own space rocket to win Derby. |
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