engine is an entirely new design aimed at the light aircraft industry. The
engine is manufactured entirely in the United States by Needleyengine
Company.All components are of the highest quality available from the
automotive/racing aftermarket as well as designed and fabricated by us..All
castings are produced from our patterns in Los Angles CA area foundries. Many
of the internal components and dimensions are common to the small block
TYPE: Two cylinder horizontally opposed air- cooled
4 stroke push-rod piston engine.
4.125".Stroke 3.750".Aluminum alloy head bolted to the cylinder
barrel with studs attached in the crankcase. Heads have provisions for dual
PISTONS: Machined from aluminum
alloy forgings. Pistons have one oil control ring and two compression
rings.Fully floating gudgeon pins with steel retainer rings. Compression
CONNECTING RODS: Forged
steel.Chevrolet small block dimensions.
CRANKSHAFT: One piece forged
steel. Rod throws clocked 180 degrees. Thrust bearings suitable for pusher or
CRANKCASE: Aluminum alloy
casting split on vertical centerline.
VALVE GEAR: Two valves per
cylinder. Small block Chevrolet dimensions. Intake 1.94" Exhust
INDUCTION: One Mikuni flatslide
carburetor with induction passages cast into the oil pan for elimination of
IGNITION: Two Slick impulse
magnetoes or a combination of magnetos and solid state electronic ignition.
LUBRICATION; Full pressure wet
ACCESSORIES; Gear driven
accessory case on rear of the engine with four pads.Alternator, two magnetos,
and fuel pump. Electric starter mounted on the upper front of the crankcase,
and engages a ring gear bolted to the prop flange.
DIMENSIONS: Length typical
19" Width 30" Height 18.5".
WEIGHT: Basic engine without
accessories 100 pounds. Wet weight with all accessories including dual slick
magnetoes 135 pounds less Propeller.
PERFORMANCE; 52 hp @ 2750 RPM
103 ft lb torque @2550 RPM.
FUEL CONSUMPTION: With standard
mikuni carburetor: Full power .6 lb hp hour 75% cruise 4000 msl .45 lb hp