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
NOT HAVING SERVED FOUR MONTHS…
Fighter-bomber CURTISS BF2C-1. The main suppliers of single carrier-based fighter for the U.S. Navy until December of 1932 was the company of Curtiss and Boeing. At first, when the Navy...
THE BEST HEATER FOR A SAUNA
While equipping my bathroom as a sauna (see "Modelist-Konstruktor" No. 10, 1997), I decided to make a powerful (3 — 3.5 kW) and reliable heater myself. The most acceptable option seemed to...
