Have a new idea for construction, adjustment or operation of model aircraft or RC? AM pays $10 for each 'hint & kink' used. Send rough sketch and description to Sketchbook, c/o American Aircraft Modeler, Potomac Aviation Publications, Inc., 1012 14th St., NW, Washington, D. C. 20005.
Series of alligator clips soldered to individual copper wires and held in bench vise serves as versatile holding device for soldering or cementing multiple part units. Submitted by Jack E. Jowett, Fairview Park, Ohio.
Bob Meuser, Oakland, Calif., builds realistic WW I machine gun barrels of balsa. Air vents along barrels are burned into balsa cylinders with heated screwdriver tip using wood block as spacing guide.
Proper CG location is important for safe test flight says Clyde E. Lower, Gainesville, Fla. Piano wire is passed through fuselage at desired CG location; model suspended by string from wire, parts installed to balance as needed.
Accurate tool for incising realistic, miniature flush screw heads or simulated rivets in aluminum sheet is idea of J. Warren Kohler Sr. Glen Head, N. Y. Parts machined from drill rod and hardened. Even rows in panels quickly made.