As the Russian proverb says, “water will find a hole”. And one that cannot be detected “by eye”. Help out in this case a bucket of water. Drop it into a “soggy” boot and squeeze, tightening the top shaft: emerging air bubbles from the holes will be given where it “hides”.
Recommend to read
ROCKET THE WINNER
The proposed model is made by the known, so-called "Moscow" scheme. Its main feature is folding the rotary wing. It is made of balsa plate with a thickness of 3.5 mm. the Center section...
THE GRIP ON THE LEASH
Bench drilling machines (such as NA-10, NA-12), as a rule, is at any station of young technicians in every school workshop. There are some in our school (I work as a teacher). And once a...
