Yak 18T Flight Operations Manual
Page 16 of 82
Disclaimer: This manual is to be used as a reference only, it is based on translated Yak 18T Flight Operations
Manuals and has not been approved by the Yakovlev Design Bureau or any other authority.
aircraft becomes increased by 10kg and the CG position of the aircraft becomes displaced
0.5-0.6 %MAC aft ward. The OSB-1 and PB-5 stations are installed only in the advanced
training version aircrafts. In this case the take-off mass of the empty aircraft is increased
by 25kg. The CG position of the aircraft shits 1.6-2.3 %MAC aft ward. For aircrafts not
equipped with SARPP-12K flight data recorder the mass of the aircraft decreases by 10kg
and the CG position of the aircraft shits 0.3-0.5 %MAC forward.
3.5. Other Limitations
• Due to the fact that the aircraft does not feature regular oxygen equipment, flights at
altitudes more than 4,000m are prohibited
• In the trainer version, the number of the crewmembers should not exceed four persons
• As parachutes are not employed in the trainer version, it is PROHIBITED
to make
aerobatic manoeuvres. However, in the initial training version with a crew of two persons
equipped with emergency parachutes, all elementary and advanced manoeuvres can be
performed
• Prolonged inverted flight and return (backward) flying is strictly PROHIBITED
• Night training flights from non-lighted runways is prohibited
• Take-off is prohibited if the quantity of available fuel is less than 60litres. In the case
of illumination of the RESERVE 30litres (Oct. 30l) light annunciator the aircraft is allowed
to fly not more than 40-45mins. Flights in the circuit should be performed with LG
extended. The minimum sub-soil strength for taxiways and runway is 4 kgf/cm²
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