Model aeroplanes / The building of model monoplanes, biplanes, etc., together with a chapter on building a model airship

by F. J. Camm

Fig. 160.—Machine without Stability

Fig. 161.—Dihedral Angles

Lubricant.—A good lubricant can be made from pure soft soap 4 parts, pure glycerine 2 parts, water 6 parts, these constituents being boiled together to the consistency of syrup.

Another excellent lubricant is made from castile soap 1 part, boiled in water 3 parts. Add black lead or plumbago sufficient to make a thin paste.

Fig. 162.—Fixing Skids

Fig. 162A.—Fixing Skids