Building a Great Lakes Sport 2T Sport Trainer

Great Lakes 2T1A-VR I-ESON
"the Outatime Flyer"

LOM M137A engine
Performance and specs. of the 6 cylinders inline inverted Czeck engine.

The engine that will power my Great Lakes is the Czeck built 6 cylinders, inline inverted, 180 hp LOM M137A engine.
That's was not actually my first's choice but this was the engine coming with the project I aquired and with time I understood the good reasons of Don Sergent's choice upon this engine, which has powered several of the last Great Lakes he has built.

The aircraft look with this engine can be compared with the Ranger Powered's, with same small front area and long cowling.
The 4 cylinders 140hp version, suitable for a Menasco C4 cowling, would have been probably better for its original 1930 looking, but everybody's opinion to keep the extra 40hp convinced me to keep the 6 cylinders.

TECHNICAL SPECIFICATIONS

MODEL	M137A
HORSEPOWER	180
Configuration	Inline, inverted
No. of Cylinders	6
Power to weight ratio	1.8 lb/HP
Frontal area	2. 1 sq. Ft.
Bore (Inches)	4.13
Stroke (Inches)	4.53
Displacement (Cubic Inches)	364.6
Compression ratio	6.3:1
Propeller drive	Direct
Performance (HP/RPM)
Take-off	180/2750
Max. Continuous	160/2680
Cruise Economy	140/2580
Fuel Consumption (US Gal/Hr)
Cruise (2580 RPM)	11.4
Recommended fuel (Oct.)	78 - 100 LL
Crankshaft rotation	CCW
TBO	2000
Dry weight (lbs)	325

The M137A engine is the "naturally aspirated" version of the 6 cylinders configuration, and differs from the M337 which is supercharged and power rated up to 210hp.
The 4 cylinders version of the LOM engine (M332) has been a reliable choice for many vintage and replicas aircraft such as Stampes, Chipmunks, Buckers, Ryans etc.

These Czeck engine are very reliable and burn automotive gas. they are fuel injected and the mixture is authomaically controlled by the injector itself up to 4500 ft. altitude.

The M137A on the mount of my Great Lakes

front and side dimensions

The Fuel injection pump incorporates into one body: The fuel supply pump, deaeration chamber and sophisticated automatic mixture control mechanism tied together with mechanical metering of fuel to each individual fuel injector TBO of this fuel system is the same as the engine, 2000 hours

It should be noted that this precise, reliable fuel system is working in any position - aerobatic Does not have and does not need any electronic input, sensors or chips for its superior, reliable, efficient function As of year 2001 the LOM fuel system is fully automatic; even the manual mixture override has been eliminated.

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