AC SPARK-PLUG'S

away unless the piece is made about % in. longer than necessary and sawed and filed to length after welding.

"TIP OF THE MONTH" Contest

It will be difficult to square the ends. The hole will be elongated by weld shrinkage and the bore will be heavily

WELDING HINT

By Ralph Korngold, EAA 2208 385 Wilton Ave., Palo Alto, Calif.

scaled. Cut your bearings exactly to the print by turning, belt sanding or filing, in that order. Put one of these plugs in each end and secure with any old Vi in. bolt, and all of these troubles are eliminated. Oxygen is exhausted from

When it is necessary to weld a short section of tubing to a fuselage member to serve as a bearing boss, it is practically impossible to keep from burning the edges

DRILL VA TYf?

PRESSURE MOLDED FIBERGLAS WHEEL PANTS

Nose Cowl (T-1 8 type) .eo. Nose Cowl (Miniplane type) . . . . . . . . . . . . . . . . . . . . .ea. Nose Cowl (Tri-Pacer type) . . . . . . . . . . . . . . . . . . . . .eo. Air Scoop (T- 1 8 type) . . . . . . . . . . . . . . . . . . . . . . . . . . ea. Spinner (T- 1 8 type with bulkhead, mounting plate, I2V 8 " dio. x l5'/ 2 " long) . . . . . . . . . . . . . .ea. Spinner (with mounting plate, 73/V dia. x 10'/8" long) . . . . . . . . . . . . . . . . . . . . .ea.

S34.95

S29.95 S39.95 S2 1 .95

NOTE

DIMENSION A"

DIMENSION B~

-.003 TUBE.

MATETRI AL - STrLEL- MILD

3D i oos

S29.95 $19.95

Many of the above components can be used on other homebuilts. Send cash, check, or money order in full. Orders shipped FOB, Northndge, Calif., same day as received, unless otherwise notified. Write for FREE information.

DAY'S AIRCRAFT CO. P. O. BOX 781

- Ji TYP

4I3O TUB.NG 3EARIMG

8.00x4 ( J - 3 Cub type) . . . . . . . . . . . . . . . . . . . . . . . . . .pr. $34.95 6.00x6 (Cessna type) . . . . . . . . . . . . . . . . . . . . . . . . . . pr. $34.95 5.00x5 or 5.00x4 (Cessna type) . . . . . . . . . . . . . . . . . .pr. $34.95

NORTHRIDGE, CALIF. 91326

the interior and there is no scaling. Absolute bore accuracy is maintained, and the plugs are easily removed after cooling. Even if the weld bead has "picked up" the edges, they will break out clean and can be used over and over. I used this technique dozens of times on our Wittman "Tailwind" and consider it to be the most valuable "trick" I ever stumbled upon.

VOLUNTEER YOUR SERVICES FOR THE

EAA ROCKFORD, ILL. FLY-IN CONVENTION AUGUST 2-7

SAFETY WIRE TOOL — $2.50

Safety bolts and nuts in hard to reach places. Guaranteed. "See Your Dealer or Distributor" GERDES PRODUCTS CO. S341 Tilbury Rd.

Dayton 24, Ohio

STITS PROPELLER SPINNER

Build, Fly Your Own One-Man

BENSEN GYROCOPTER So stable it flies hands off! KNJOY your own personal Bensen Gyrocopter; pros call it "the greatest thrill in flying." Flown by others like you all over the world. Available in plans and kits, the ultra-light, portable, man-sized Gyrocopter can be built and assembled in your own back yard. Lifts up to 500 lbs. Economical to operate, on wheels or floats. Order 3-View Drawings, specs, photos for $2, or of simpler Gyroglider for $1. BENSEN AIRCRAFT CORP., Dept. SA-5S

aircraft

pitch props on horizontal opposed engines up to 170 HP. Aeronca, Bellanca, Cessna, Champion. Commonwealth, Culver, Ercoupe, Funk, Swift, Interstate, Luscombe, Mooney, P i p e r , Porterfield, Stinson, Taylorcraft, Trojan, etc. Aerodynamic contour increases prop hub efficiency, proven in thousands of hours service to decrease oil & cyl. head temp. Size 8" diam. x 11 Vi" long. Installation kit includes all parts & completed detailed, illustrated mounting instructions. Each Prepaid.. $25.00

STITS AIRCRAFT

NAME___

ADDRESS(1) MAY 196S

light

using f i x e d

WRITE FOR FREE BROCHURE

Naleigh-Ourham Airport, Raleigh, N. C.

40

F.A.A. APPROVED Designed for installation on

P. O. BOX 3084-E RIVERSIDE, CALIF.

INSTRUMENTS

COMPONENTS

Kollsman airspeeds, new condition, 0-220 mph, $10. Acceleromcters—recording, 3 needle, 2%" dia. B-6, $16.50, 3Vs" di°. B-3, $8.50. New 3 in 1 oauge, oil pressure, oil temperature, fuel pressure, 8' capillary, AN5774, $10. Matching set, new 2'/i" dio. oil pressure, $4.50, 2'/4" oil temp., $12.50, 2'/4" fuel pressure $4.50. Head temp, gouges S8.50. New AC tachometers for 65, 75. 80A Cont. engines $7.50. Kollsman and Jaeger tachs., fits all engines $10. Electric tachometer sets, eliminates heavy cable to cockpit, ideal (or Volmer amphibian, includes generator, cannon plugs, instrument, $21. Compasses, B-16, S'/n" dia., $15, 2'/4" dia. Airpath $17.50. Bonk indicators $2.50. Manifold pressure 10-50 in., $8.50. Rate of climbs, Kollsman $14.50. Sensitive altimeters, Pioneer $ 1 6 5 0 . Coil spring shock absorbers, for Miniplone and similar gear, with plans, SI 2. Complete jack screw trim tab kit for Miniplane, etc., $17. New B - 1 4 military safety belts $7.50. Shoulder harness for B-14 belts $7.50. Airliner passenger safety belts, left over from Convair 990 Jet production, brown with bronze buckle, block with chrome buckle, $6. Shoulder harness to match, $6. FAA certified, new stock, dressy. 2-place special, 2 sets, belts and harnesses, $20 for T-18, etc. P-38 fighter, rear view mirrors $2.50. Pitot heads, chrome, leading edge mount type $4.50. Primers, new modern style, maroon knob,

$4, Gas tank filler neck wth cap, aluminum base, ready to weld on, $7.50. Vacuum turn and banks, Bendix, $10. Magneto switches, fits 2'/4" hole, $4. Magnetos, S4LN-21 for 125 hp Lye., near new, $57.50. 12 volt, B«ndix fuel pump, $18. Add 596 f°r shipping costs. CLAUDE GRAY 9635 Sylvia Ave. Northridgc, Calif.