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Re possible absence of sleep: frigatebirds may have uni-hemispheric sleep, such that left and right brain hemispheres alternate sleep at different times. Cetaceans and many birds are known to do this.REM-sleep (with complete muscle relaxation) may have evolved to be different, though.
Clare...so sorry for not replying to you. I got my kit from the Polish site Shipyard. The frames were all pre-cut. Each frame piece is laser cut and has small tabs that when cut frees the frame from the cardboard.
Taking helicopters into these icing and thunderstorm situations is interesting because their very high wing-loading on their rotor and the fact that the rotor is free teetering causes them to have a pretty smooth ride in turbulence. They are still not indestructible, though, and they are subject to icing on their blades just like an airplane.
An exception to the above rule is altitude. If you hit the altitude button, the autopilot will be set to the current altitude. This is not the way a smart pilot flies, though. A smart pilot with a good airplane, a good autopilot, and good planning will dial in the assigned altitude long before he or she gets there (including the initial altitude before take off) and then use vertical speed, flight level change, or even pitch sync to reach that altitude.
You hit either the V/S, FLCH, or SPD button. The autopilot automatically notes the current vertical velocity or airspeed, and the plane flies at that airspeed or vertical velocity until it gets to 3,000 feet, where it levels off.
Vehicles are divided into three main categories: Aviation, Ground, and Fleet, while game modes are divided between Arcade, Realistic, and Simulator. Aviation is divided between fixed-wing aircraft and helicopters, and Fleet is divided between "Bluewater" and "Coastal", where Bluewater represents ships from the size of destroyers to battleships and battlecruisers, while Coastal focuses on smaller ships such as motor torpedo boats, motor gunboats, subchasers, and frigates. A single player mode is also available that focuses on historical battles, and also a cooperative mode for battling AI ground vehicles and aircraft.
X-Plane is not a game, but an engineering tool that can be used to predict the flying qualities of fixed- and rotary-wing aircraft with incredible accuracy. Because X-Plane predicts the performance and handling of almost any aircraft, it is a great tool for pilots to keep up their currency in a simulator that flies like the real plane, for engineers to predict how a new airplane will fly, and for aviation enthusiasts to explore the world of aircraft flight dynamics.
The full X-Plane scenery package covers the Earth in stunning resolution. On Earth, users can land at any of over 33,000 airports or test their mettle on aircraft carriers, oil rigs, frigates (which pitch and roll with the waves), or helipads atop buildings. You can fly with friends over the Internet or a LAN, and shoot approaches at night in stormy weather and rough conditions with simulated aircraft systems failures. The situations that can be simulated are unbelievably diverse!
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