Thin-walled tube of soft metal when you try to bend often creased. To avoid this, they are usually pre-stuffed with sand.
With the same purpose, you can use another method: navit on the future site of bend copper or aluminum wire – turns will not allow the tube to wrinkle at the bend.
The same result can be achieved using a suitable inner diameter of the spring.
Recommend to read
“WAGTAIL” IS THE AUTOGYRO FOR THE SUBMARINE
The first and most important work on the rotating propeller to generate lift forces were made in the period between the world wars. Thus, it was found that the spinning rotor can...
FROM THE MECHANICAL? WILL NOT FALL OUT!
When you need to screw the nut in an inaccessible place, it is more convenient to use the mechanical key. But the nut often falls out, not having to be in place. There are two ways to...
