The 100th anniversary of the internal combustion engine. In one of the magazines last year published an interview with a famous doctor of technical Sciences, a specialist for secure transport, where it was said literally the following: “are You sure, that in the ordinary automobile motor, in fact there are consistently a suction, compression, working stroke of the piston, the exhaust! I’m not sure… In my opinion, at 3-4 thousand revolutions per minute these ticks do not have time nor place nor change each other, and our understanding of them no more than a suitable scheme to calculate…”
Happy birthday, four-stroke!
Worldwide specialists in armored vehicles by the famous Soviet main battle tank T-72 “Ural” and his heir — the Russian main battle tank T-90. But few know that the basic design and technical solutions used in these combat vehicles were tested on prototypes of tanks “Object 166Ж” and “Object 167”.
In the decades after the civil war ghosts lucky raiders — armed ships of the southerners was a constant headache to the lords of the British Admiralty. In the event of war with such countries as all the same, the United States, or France, or, for example, Russia, have become a real threat to be found in the seas already dozens of enemy auxiliary cruisers. Besides, over the years, the characteristics of possible candidates in the raiders kept on rising. The best ships had a very decent speed and the shipowners the government specifically pay extra for a more durable design, allowing, if necessary, to set them on a very solid rifled guns of a caliber of 6 inches In such circumstances, numerous corvettes and sloops “mistress of the seas” lost technical superiority over makeshift opponents. Of course, the military remained the advantage of a ship with a disciplined and trained team, but it might not be enough for a confident victory in battle one on one. Needed a solution that allowed staff of cruisers once again regain its dominant force.
In September 1931 under the Central Council osoaviahima of the USSR in the Bureau of air technology was organized by the Group of jet propulsion study (gird). Its first Chairman was the enthusiast of interplanetary flights, by F. A. Tsander. The group has launched a scientific advocacy of missile technology and was the initiator of the campaign, “the assault On the stratosphere”.
For the UK the 90-ies of the XIX century was both a time of triumph and anxiety. On the one hand, its fleet was still able to oppose to each ship, any enemy two or even three. On the other hand, Empire every couple of years to grow new territories and peoples; for such an extensive economy required a constant supervision. Increased the number of “countries envious” capable of delivering the mistress of the seas of trouble in the event of armed conflict.
In the “M-K” have already talked about manual cultivator with fibronogen developed by members of the glee club VOIR (see “M-K”, 1976, No. 12). Further development of this design, in which muscular effort is minimized, was the tiller.