Aero Cors-Air USA LLC is proud to introduce a new and more powerful version of the Cors-Air engine line, The Black Bull. 
                                     This engine was designed for those pilots who want even more power, shorter take-off runs and a very high climb rates. 
                                  The Cors-Air Black Bull can be used for foot launch PPG, PPG Trikes, Delta Trikes, ultralight airplanes and UAV (DRONES) 
            This new powerplant is still light compared to other brands  its class,  it is sturdy, reliable and user friendly, just as the rest of the Cors-Air Motors engines. 
                            After many tests on the bench and in the air where flown by well known PPG pilots and , in the harshest and most "unfriendly" environments,  
                       changes and improvements performed on  the prototypes the  final version of the Cors-Air Black Bull prototype passed all tests with flying colors. 
The first engines left the factory in Italy by the end of November 2015 and ever since, we did not hear from a single pilot who regretted buying this mighty powerplant! 
            The Black Bull is the most powerful engine in our "fleet" which consists of Cors-Air M19/Black Magic, Black Devil LIGHT and Black Devil LIGHT/SPORT. 
 
 
 
 
 
 
 
 
 
Cors-Air "Black Bull" engine specifications: 
 
 CYCLE:   TWO STROKE 
 
 TOTAL DISPLACEMENT:   235 C.C. 
 
 BORE:   70mm 
 
 STROKE:   61mm 
 
COMPRESSION RATIO:   10.5:1 
 
 COOLING:   air cooled  and with optional cooling shroud 
 
 Maximum RPM:   8000 RPM 
 
 PISTON:   Two aviation rated chrome plated and beveled rings 
 
 Cylinder HEAD:  CAST AND MACHINED Aluminum alloy with high silicone percentage  
 
 Combustion chamber with improved squish 
 
 CRANKCASE:  CAST IN G-AL SI 9 UNI 3051 ALLOY SUBSEQUENTLY TREATED AND ANODIZED AGAINST SEA SALT 
 
 CONNECTING ROD:   COPPER PLATED STEEL 18 NI CR MO5 CONNECTED TO THE DRIVE 
 
 CRANKSHAFT: :WITH VERY PRECISE HIGH SPEED SILVER-PLATED ROLLER BEARINGS 
 
 CARBURETION:   DIAPHRAGM OR EFI (ELECTRONIC FUEL INJECTION) 
 
 CRANKCASE FUEL DELIVERY:   SIX BLADE REED-VALVE SYSTEM CONNECTED TO THE CRANKCASE 
 
 IGNITION:   ELECTRONIC  CDI (ELECTRIC VERSION) WITH DOUBLE SPARK PER STROKE FOR SAFETY AND CLEAN BURN 
 
 IN-FLIGHT BATTERY CHARGING SYSTEM not available yet 
 
 SPARK PLUG:  NGK BR10ES OR SIMILAR 
 
 SYSTEM:   SIX PORT DISTRIBUTION / CYLINDER TRANSFER AND EXHAUST WITH BOOSTER (TUNED EXHAUST) 
 
 CYLINDER:   ALUMINUM ALLOY WITH SPECIAL "NICASIL" COATING 
 
 REDUCTION:   WITH POLY V BELT AVAILABLE  IN 1:3.0 — 1:2,88 
 
 CYLINDER HEAD TEMPERATURE:   MAX TEMPERATURE 230C  \  446F MEASURED UNDER SPARK PLUG 
 
 EXHAUST: TUNED WITH 3 (THREE) THREE FLEXIBLE CONNECTIONS TO BETTER DISSIPATE VIBRATIONS 
 
 EXHAUST GAS TEMPERATURE:   NOT EXCEEDING 590 C \ 1094F 
 
 ENGINE MOUNTING:  BY 5 SHOCK ABSORBING RUBBER MOUNTS (VIBRATION INSULATORS) (#5 mount) should  support from under the engine 
 
 CRANKSHAFT ROTATION:  COUNTERCLOCKWISE 
 
 CRANKSHAFT CONSTRUCTION:  18 NI CR MO5 ALLOY  WITH 5 THERMO TREATMENTS ON EVERY COMPONENT 
 
 ROLLER BEARINGS:   DESIGNED  FOR HIGH RPM, CLASS C3 
 
 CRANKCASE OIL SEALS:  DOUBLE  LIP,  MADE OF  "VITON" WITH VERY HIGH RESISTANCE AND LONG LIFE 
 
 FUEL / OIL RATIO:  MIXTURE 3% - 3,5% WITH SYNTHETIC OIL; SUGGESTED BRANDS: MALOSSI7.1—WLADOIL K2T 
                                          —ELF 2T MOTO, CASTROL TTS, HONDA  HP2  FULLY SYNTHETIC RACING OIL 
 
 ENGINE WEIGHT:  HAND START KG 12,55 + KG 3,80 FOR THE EXHAUST 
                                         ELECTRIC START KG 13,40 + KG3,8 0 FOR THE EXHAUST 
 
 
Engine schematics and dimensions in millimeters: 
 
 
 
 
Simplified measurements in inch:  
 
Engine Depth: 9 inch /distance between all 4(four) engine mounts (vibration insulators): 6,5 inch 
 
 
Engine introductory prices ended July 30 2015 : 
 
 
 Black Bull Electric start:   USD 3,4750.00  plus shipping (cooling shroud optional) no battery charging  
 
 
 
 Black Bull manual start engine:   USD 3,340.00 plus shipping  (cooling shroud optional)  
 
 Black Bull Hybrid engine (hand start and electric start)   USD 3,520.00 plus shipping 
 The electric start or hybrid Black Bull does not charge the battery in flight 
We recommend buying the Hybrid engine (with el. start and hand start) and using a 12 Volt  Sealed Lead Acid battery  
of 3,5 Ah capacity, one can get from 20- to 25 cold starts which is plenty for a flying session 
 
NOTE: If five (5) or more engines are purchased in the same time, dealer's prices can be applied 
 
 
 
 
 
 
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