If you pick up a-liter plastic bottles of diameter to one (cut) densely entered second, you get the original expander, exerciser for the muscles of the hands. Adding to the bottom of any of these several holes, you can adjust the force required to compress and stretch. I used the bottle from the water “Darida” and “Berezinsky” turned out pretty well.
A. VINOGRADOV, Mogilev, Republic of Belarus
Recommend to read
THE BEST PROPELLER FOR YOUR MODEL
Now, when the rules of the FAI, the weight of the rubber motor is reduced, and the number of rounds in the competition increased to seven, rotor group should be given maximum attention....
RELAY HALF-TRACK VEHICLES
Lenin in Gorki near Moscow in the spacious garage, which is included in the exposition of the House Museum of V. I. Lenin, it is an unusual machine: instead of rear wheel rollers with...
