Why do Russian planes have fans in the cockpit?
Why do Russian planes have fans in the cockpit? The cockpit blowers help circulate fresh air into the cockpit and cool down the pilots.
Why do Soviet planes have glass noses?
What's with the glass chin? You'll notice if you look closely that the IL-76, like a number of old Soviet aircraft, has glass in the lower-half of its nose. This was specially made for a navigator to be able to have an excellent view of the outside, especially when landing.
Can helicopter fly over Mount Everest?
Helicopters can can fly and even land at the height of Mt Everest -- but just barely. The air is very thin up there making it very difficult for helicopters to develop lift. It can only be done in the best of conditions, and only with the best high-altitude helicopters.