I want to introduce readers “To the” constructed me an amphibian. Constructed I, in practice, to solve a number encountered in the design of problems and contradictions. There were quite a lot, but the main makes sense to call.
1.Is it possible to create a car with an engine of class 50 cm3? What will be its speed and capacity?
It turned out — you can! Weight 80 kg, he freely carries an adult with a speed of 30-35 km/h (on asphalt), provided that the vehicle has elastic suspension of the wheels. A stiffer suspension is much harder to control the car jumps and it understeers like crazy, which is already apparent at speeds above 20 km/h but at speeds just above bike (16…18 km/h), it easily carries two adults and takes any upgrades on the roads. One driver from the scene enters the ramp with the angle of elevation of 15°.
2.Is it worth to speed up the engine?
It turned out — not worth it. During the crossing of the motor increase power is by increasing the speed. Torque while not increasing. The engine characteristic becomes steep. All this complicates the starting and requires a multi-stage gearbox. Interestingly, the engines sh-51 and D-6, working with the same gearbox behaved identically, despite different capacities.
3.What can be the minimum dimensions of single amphibian? What possible speed?
I can report that my machine was assembled in an apartment located on the tenth floor. Therefore, the size of it was limited to the dimensions of the freight Elevator and drawer, which served as a garage for amphibians — 2000X2000X700 mm. So, the height is 300 mm; this allows the amphibious freely to stay afloat with two grown men, plunging in the water to a depth slightly greater than half the side. And one driver of sediment of only 120 mm. afloat the car is very stable — it is possible to throw a spinning, sit on the hood, side or rear without the risk of overturning. It has played the role of the low position of the engine and running gear, which has become a kind of ballast. I believe that the minimum possible size for a single option can be brought to 2000Х800Х400 mm.