To use a bike instead of round sprocket Ellipso suggested in 1892 Professor V. Prusakov. He decided to put the rods along the minor axis of the ellipse that has allowed more efficient use of the power of the cyclist. Experiments have shown that even an inexperienced rider on a machine with the elliptical sprocket expends energy approximately 30% lower than on moving with the same speed filemashine with a round sprocket. And according to the American engineers, the use of oval zubchatki increases the average speed of a cyclist by about 14%.
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The idea to design children’s recumbent came to me not by accident. The fact that all of the current children’s pedal cars are not without drawbacks. The idea of the idealized child recumbent folds, in my opinion, from the following functional features: collapsible design; similarities with the car; ease of use and storage; maximum comfort for your child.
A few years ago we managed to build a very successful vehicle — herohitonakomode. Testing of this device proved to be very successful and we wish our experience could use a lot of homebrew.
The results of the last three meetings, which were attended by hundreds of aviation enthusiasts, showed that the majority of the devices is executed at a high professional level. But there were planes, which the creators clearly lacked basic knowledge and experience. These machines, made in violation of the laws of aerodynamics and theory of strength, to fly is not allowed.
One of the main tasks of a designer in any vehicle is to make it easier. Of course, not at the expense of stiffness and strength.
Minicar “Duet” was designed as a vehicle suitable for the carriage of four passengers or small loads weighing up to 500 kg. In the fabrication process there were several different variants of the decision of those or other sites, many reworked and peredelyvalis not the one. In the end, it turned out, in General, a good car.
Certainly in every family one goes bad or becomes unnecessary tricycle. And then sell it or just throw it away. Meanwhile you can give him a new profession and it will serve your children even: out worn the tricycle will make a great scooter. At the time I made this for my three year old son. Instead of wheels on the rear axle put on rock skis. And the front fork set on rocking the same — the steering ski.
The trial… This term is familiar to many today. Competition for Moto and bike trial attract thousands of enthusiasts for these new sports. But if the trial fits of the serial technique, for trials on the bike to buy two-wheeled machine in the store is impossible. Athletes tend to create cross bikes themselves, based on one of the models produced by the industry.
They parted ways at the dawn of the automobile, and since then, the development lines are not intersecting until now… we are Talking about a motorcycle and car.
All wheelchairs domestic production have a primitive manual transmission.
