HIRTH 2706

The following is factory published information for the 2706 engine.  To best meet specific requirements in our BD-5 installation, the 2706 engines delivered with our powerplant system will be custom configured.

The 2706 produces more horsepower and torque per pound than any other engine in its class.  Factory recommended TBO is rated at 1000 Hrs. @ 75% power.  This engine incorporates Al-Nikasil coated cylinders for superior performance and reliability. Al-Nikasil in simple terms is a nickel based material, applied in a paste form, when super heated it becomes part of the cylinder itself. Al-Nikasil provides for a super low coefficient of friction, reducing engine heat and wear. The pistons and cylinders expand at the same rate thus providing for a seizure resistant engine.  The 2706 crankshaft is made of 4130 chromemolly steel. Heads, cylinders, rings, block casting, connecting rods and associated components are all of the highest grade alloys available.

There are many features that make the Hirth 2706 the logical choice reciprocating engine for the BD-5B aircraft:

• Size, weight and horsepower ideally suited to the BD-5 original design requirements.

• Economical acquisition and operating costs (approx. 4.2 GPH fuel @ 75% power).

• Available factory new with 1YEAR UNLIMITED WARRANTY and factory  support. 1,000 hr TBO rating.

• The 2706 engine was originally designed as an aircraft engine, and  thus utilizes highest grade materials and quality workmanship.

• Cylinders feature Al-Nikasil coating for a super low coefficient of friction, reducing engine heat and wear. This coating eliminates  the need for cast iron sleeves in the cylinders. As a result, pistons and cylinders expand at the same rate providing a seizure resistant  engine.

• Integral fan cooling system.

• Computer controlled ignition system- standard equipment. Provides easy starting and 7,000 rpm speed limit protection.

• Electronic Fuel Injection option provides increased (up to 30%) fuel economy and automates altitude mixture control. At 75% power fuel  consumption is approx. 3.2 GPH. THIS IS AS GOOD OR BETTER THAN MOST 4-CYCLE ENGINES AT EQUIVALENT CRUISE HORSEPOWER.

Hirth 2706 Specifications

Engine Type:	2 cycle, two cylinder
Bore & Stroke:	76mm x 69mm
Displacement:	625cc
Compression:	9.5:1
HP Output:	65hp @ 6200rpm
Torque:	56 ft-lbs @ 5700rpm
Ignition:	Dual CDI (Capacitive Digital Ignition.)
Carburation:	Dual 38mm slide or optional electronic fuel injection
Fuel Pump:	Auxiliary external pneumatic / electric pump with fuel injection
Lubrication:	Fuel mixed with oil @ 50:1 or optional oil injection
Starter:	12 volt electric
Alternator:	250 watt/20 amp alternator standard
Cooling:	Air Cooled with Integral Fan
Weight:	79 lbs including exhaust.

Hirth 2706 Performance

FLIGHTLINE Series BD-5B