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1.2. SPECIFICATIONS
1.2.1. Engine
Designation................................................................................M-14P
Cooling system ..........................................................................Air-type
Engine starting system ..............................................................Air-type
Engine continuous operation time:
At take-off rating ..............................……..…………..................Up to 5 min
At maximum permissible speed, of rotation .......... ...................Up to 1 min
At other ratings .................................. ......................................Not limited
Iverted engine operation:
Ratings ........................................... ..........................................Nominal
Continuous operation time ......................... ..............................Up to 2 min
Total time within service life ...................................................... Up to 18 %
Maximum permissible speed of rotation ............... ...................2950 (101 %) r/min
Acceleration (pickup) from 760 r/min (idle) to take-off
rating on stationary airplane .............. .......................................Up to 3 s
Maximum permissible crankshaft speed drop when
changing over to one-magneto operation at nominal
rating II and cruise rating I (low-pitch airscrew) ........................ 85 r/min (3 %)
Number and arrangement of cylinders ..................................... 9, radial, single-row
Cylinder numbering .................................. ................................Countercio ckwise if viewed from
rear cover side, top cylinder is Ho. 1
Cylinder bore .............................................................................105 mm
Piston stroke:
Cylinder No. 4 ...........................................................................130 mm
Cylinders Nos 3 and 5 ...............................................................130.15 mm
Cylinders Nos 2 and 6 ............................. .................................130.23 mm
Cylinders Nos 8 and 9 ............................. .................................130.39 mm
Cylinders Nos 1 and 7 ............................. .................................131.25 mm
Total displacement .................................. .................................10.161 1
Compression ratio ................................... .................................6.3±0.1
Direction of rotation of crankshaft and airscrew shaft ...............LH
Engine dry mass ..................................... 214 kg+2%
NOTE: Engine dry mass does not include mass of the generator, compressor, fine
filter with pipelines, engine frame ring, exhaust manifold parts, tachometer generator.
Engine overall dimensions:
Diameter (over valve mechanism case covers) ....... ...............(985±3) mm
length ............................................ ...........................................(924±3) mm
