The end of last winter was marked by the “epochal invention” is a rambunctious boy came up with the most slippery in the world of galoshes, which they successfully used for downhill from the mountains. The basis of such overshoes-ski (ha-ski?) became a two-liter bottle of soda water in it (carefully) cut a hole in which some interference should enter the winter boot.
Recommend to read
ATLAS PROFILES
PROFILE "NACA-6409". Developed in the early 30-ies in the aerodynamic laboratory of the NAC (USA) for lifting aircraft-biplanes. This profile can be recommended as models of gliders...
YEAR-ROUND ASSISTANT
Fifteen years subscribed to the magazine "modelist-Konstruktor" and in each room find a lot of interesting and useful articles. By education I am a mechanical engineer and I am...