Saito FG-14C Owner's Operating Instruction Manual page 28

FG-40 Dimensions and Specifications
FG-40 Outside Dimensions (mm)
SPECIFICATIONS
Fuel consumption
Approximately 30cc/minute at full throttle and
approximately 7,500 rpm. Fuel consumption depends
on the load of the propeller. During actual flight, fuel
consumption increases slightly.
28
Stroke 32mm (1.26 in)
Weight (Engine only) 44.2 oz (1253 g)
Weight (Muffler only) 3.0 oz (85 g)
Weight (Engine Mount only) 9.6 oz (270 g)
Weight (Ignition only) 3.7 oz (105 g)
Total weight (all inclusive) 60.5 oz (1713 g)
Crankshaft M8x1.25
Cylinder AAC
Fuel Efficiency 30cc/minute
Propeller Size Dia. 18–19 x Pitch 8–9; Dia. 20x Pitch 8
Benchmark Propeller APC 18x6W @ 8,000
Practical Ground RPM Range 1,700–9,000
Disp 40.2cc (2.40 cu in)
Bore 40mm (1.57 in)
HP 3.5 approximately
Electrical usage of ignition system:
Approximately 125mAh for 15 minutes.
Igiition Operating Voltage: 4.8–9.0 volts
Fuel: Gasoline-Oil mix of 20:1 (20:1 is recommended for
break-in and continuous operation).
Oil: The use of only 100% synthetic oil is recommended
such as our Evolution Oil (EVOX1001Q)