
Often, after the hole is drilled,further or a clean, slightly to expand or to make a slightly oval shape. This work can be facilitated steel Bender, automating it with a drill in a cartridge which is inserted a circular, semicircular or even triangular needle file or similar file section.
V. SIZIKOV
Recommend to read
THE CORRUGATED BOARD MOTOR
Not so long ago in the journal "modelist-Konstruktor" was about the simplest model of a glider made from a conventional packaging corrugated Board material although not aeromodelling,...
A FIGHTER WITHOUT A KEEL…
Seaplane Hansa-Brandenburg W-12. The date of establishment of the naval aviation of Germany is considered to be 26 Oct 1910. On that day Admiral Alfred von Tirpitz signed a Directive on...