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
GRUMMAN F6F3 HELLCAT
This plane can rightly be called the most successful American fighter of the Second world war. Experts from the U.S. Navy estimated that 75 percent of all air victories of the naval...
BOAT FOR CALM WATER
At the time of making this simple craft, even the name of which is hard to find: "whether the junk, or boat, or boat, or raft", I had a "Kazanka" boat is roomy, durable. However, it was...
