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- Flight Operations Manual
Yak 18T Flight Operations Manual - page 49
Yak 18T Flight Operations Manual
Page 49 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.
• The IAS during the half-loop recovery must be 140km/h. If the speed at the time of
the half-roll is NOT 140km/h, then the half-roll is NOT ALLOWED to be performed.
TERMINATE the manoeuvre WITHOUT making the second half-loop
8.14 Aircraft Behaviour at Large Angles of Attack and Stall
• Pilots are warned about the fact that the aircraft is approaching a STALL by an
AUDIBLE signal in the headset and LIGHT signals (indication DANGEROUS SPEED on
the annunciator panel) approximately 15 SECONDS prior to the stall
• The character of the Yak 18T can be remarkably DIFFERENT to that of a C172. For
example, a C172 experiences a relatively sharp nose drop after the stall has occurred.
The 18T has been known to produce a negative VSI upon stall without any other visible
or audible signals so DO NOT RELY on receiving a stall signal for the awareness of the
aircraft stall. A good instrument SCAN and attitudinal awareness will help to highlight an
imminent stall and UNEXPECTED negative VSI reading
• The warning detector is SET to the response indicated speed of 130km/h. The warning
indicator is cut-in by a toggle switch on the switchboard
• The aircraft controls retain their operational effectiveness at low flight speeds, up to the
POINT of the actual stall
• Other symptoms at the point of stall include a nose down attitude with rolling either to
the left or to the right side and a small shaking or buffeting
• By pushing the yoke FORWARD, the aircraft attitude will transition from the angle of
incidence to one that is below the stall, but only once the speed INCREASES
• The indicated stalling speeds with n
y
=1.0 are as follows –
• in the cruise configuration at the engine conditions IDLING 120-123km/h
• in the cruise configuration at the engine conditions NOMINAL I 102-105km/h
• in the landing configuration at the engine conditions IDLING 112-114km/h
• in the landing configuration at the engine conditions TAKE-OFF 97km/h
• Large speed values correspond to the aircraft's weight of 1,650 kg, small ones to the
aircraft's weight of 1,500kg
• At NOMINAL I engine conditions, with a full pulling of the yoke after the stall, the
aircraft will ROLL either to the left or to the right with a greater VIGOUR than at
IDLING conditions
• During 360° banked turns and spirals, while pulling the yoke BACKWARDS, the aircraft
vigorously DROPS the nose with a simultaneous rising of the IAS an INCREASE in roll
will also take place
• An even greater INCREASE will occur if dropping the nose at the time of stall, and more
so, the higher the speed during the turn-spiral. In moving the yoke FORWARD, the
aircraft makes a quick transition to a sub-critical angle-of-attack
• In this case, pre-stall warning of shaking or buffeting is NOT felt. However, at the time
of the actual stall, a slight shaking or buffeting APPEARS
• The turn-spiral stalls with different engine conditions and c.g. positions DO NOT differ in
their nature
Summary of 18T
Page 2: Table of Contents
Yak 18t flight operations manual page 2 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. Table of contents t able of c ontents ....................
Page 3
Yak 18t flight operations manual page 3 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. 6.7. Engine run-up .......................................
Page 4
Yak 18t flight operations manual page 4 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. 11.18. Special feature of the power unit at low ambient...
Page 5: Introduction
Yak 18t flight operations manual page 5 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. Introduction this manual is to be used as a general gui...
Page 6
Yak 18t flight operations manual page 6 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. Section 1 – background information this section contain...
Page 7
Yak 18t flight operations manual page 7 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. The students had to study the nuts and bolts of trainin...
Page 8
Yak 18t flight operations manual page 8 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. Influence (air intakes are located on both sides of the...
Page 9
Yak 18t flight operations manual page 9 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. Union standard) is 1012-72. But voronezh mechanichal pl...
Page 10
Yak 18t flight operations manual page 10 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. 7 - filler 16 - fuel fire shut-off valve 8 - fuel quan...
Page 11
Yak 18t flight operations manual page 11 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. Section 2 - technical information this section contain...
Page 12
Yak 18t flight operations manual page 12 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. 2.2.1 general data length 8.39m ±1.6cm (27’6”) height ...
Page 13
Yak 18t flight operations manual page 13 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. 2.3 fuel specification and octane number petrol b-91/1...
Page 14
Yak 18t flight operations manual page 14 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. 2.15 propeller symbol v530ta-d35 type variable-pitch t...
Page 15
Yak 18t flight operations manual page 15 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. Section 3 – operational limitations 3.1. Flying limita...
Page 16
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...
Page 17
Yak 18t flight operations manual page 17 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. Section 4 - pre-flight inspection a quick review of yo...
Page 18
Yak 18t flight operations manual page 18 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. 17. Switch the engine instruments to the on position 1...
Page 19
Yak 18t flight operations manual page 19 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. Are you ready to brief them? Have you got the prerequi...
Page 20
Yak 18t flight operations manual page 20 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. 45. To drain and inspect the fuel contents, move under...
Page 21
Yak 18t flight operations manual page 21 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. 56. Perform the walk around slowly; take your time. If...
Page 22
Yak 18t flight operations manual page 22 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. 61. Check propeller blade setting according to setting...
Page 23
Yak 18t flight operations manual page 23 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. 67. Check the starboard wing and look for damage of th...
Page 24
Yak 18t flight operations manual page 24 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. 81. Check the radio-altimeter aerial, radio compass an...
Page 25
Yak 18t flight operations manual page 25 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. After entering the cockpit, the pilot should proceed a...
Page 26
Yak 18t flight operations manual page 26 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. Check the engine controls – 103. Check the motion of t...
Page 27
Yak 18t flight operations manual page 27 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. Section 5 – engine start preparation the following tex...
Page 28
Yak 18t flight operations manual page 28 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. Consumption, and almost inevitably to pieces of the ri...
Page 29
Yak 18t flight operations manual page 29 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. The system is good, but is not cheap (us$1,000), as we...
Page 30: Section 6 – Engine Start
Yak 18t flight operations manual page 30 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. Section 6 – engine start at ambient temperatures of +5...
Page 31
Yak 18t flight operations manual page 31 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. 6.4. Engine starting to start the engine, the pilot sh...
Page 32
Yak 18t flight operations manual page 32 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. Now that the engine has started, pay particular and fr...
Page 33
Yak 18t flight operations manual page 33 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. • the engine is considered to be warmed-up, if the tem...
Page 34
Yak 18t flight operations manual page 34 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. And at night - to avoid discharging of the airborne ac...
Page 35
Yak 18t flight operations manual page 35 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. • using the thrust lever set a speed of 70% with the p...
Page 36: Section 7 - Flying
Yak 18t flight operations manual page 36 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. Section 7 - flying 7.1. Take-off preparation prior to ...
Page 37
Yak 18t flight operations manual page 37 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. This position until the aircraft rotates naturally upo...
Page 38
Yak 18t flight operations manual page 38 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. • this enables us to maintain a uniform load on the ma...
Page 39
Yak 18t flight operations manual page 39 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. • training flights into cloud are not allowed. In the ...
Page 40
Yak 18t flight operations manual page 40 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. • increase the engine speed rpm to the specified one •...
Page 41
Yak 18t flight operations manual page 41 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. Section 8 – aerobatic flight manoeuvres the yak 18t wi...
Page 42
Yak 18t flight operations manual page 42 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. Front portions of the aircraft canopy relative to the ...
Page 43
Yak 18t flight operations manual page 43 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. • when the specified bank and required angular velocit...
Page 44
Yak 18t flight operations manual page 44 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. 8.4 combat turn • before entry into this manoeuvre, st...
Page 45
Yak 18t flight operations manual page 45 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. Successful. Select the necessary ground reference poin...
Page 46
Yak 18t flight operations manual page 46 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. • while slipping, keep the flight direction using a re...
Page 47
Yak 18t flight operations manual page 47 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. • then by means of a fast pedal deviation by 1/3 rd of...
Page 48
Yak 18t flight operations manual page 48 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. • when the angle of climb is increased by more than 20...
Page 49
Yak 18t flight operations manual page 49 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. • the ias during the half-loop recovery must be 140km/...
Page 50
Yak 18t flight operations manual page 50 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. • given the right conditions when entering the stall, ...
Page 51: Section 9 - Spins
Yak 18t flight operations manual page 51 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. Section 9 - spins spins are prohibited unless the pilo...
Page 52
Yak 18t flight operations manual page 52 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. • at the first 3-tum spins the angle of longitudinal i...
Page 53
Yak 18t flight operations manual page 53 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. • for getting the aircraft out of the spin, deflect th...
Page 54
Yak 18t flight operations manual page 54 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. • after the second turn its spinning will be the same ...
Page 55: Section 10 - Landing
Yak 18t flight operations manual page 55 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. Section 10 - landing 10.1. Descent and landing prepara...
Page 56
Yak 18t flight operations manual page 56 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. 4. Gliding between the turn onto base leg and turn to ...
Page 57
Yak 18t flight operations manual page 57 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. 10.5. Crosswind landing 1. On the crosswind approach c...
Page 58
Yak 18t flight operations manual page 58 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. • by closing the fire valve with carburettor fuel usag...
Page 59
Yak 18t flight operations manual page 59 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. Section 11 - special cases in flight 11.1. Pilot actio...
Page 60
Yak 18t flight operations manual page 60 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. • if the fuel pressure is good, then it is a reasonabl...
Page 61
Yak 18t flight operations manual page 61 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. • in all cases (with the exception of a drop in fuel p...
Page 62
Yak 18t flight operations manual page 62 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. 4. To execute the forced landing on the unprepared are...
Page 63
Yak 18t flight operations manual page 63 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. 11.10. Landing with the flap retracted if the pilot do...
Page 64
Yak 18t flight operations manual page 64 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. 11.14. Pilot actions in case of converter failure if t...
Page 65
Yak 18t flight operations manual page 65 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. • disconnect and remove the headset • set the seat to ...
Page 66
Yak 18t flight operations manual page 66 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. • turn the master switch and magnetos off, drain the i...
Page 67
Yak 18t flight operations manual page 67 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. Section 12 - operation of systems and equipment 12.1 r...
Page 68
Yak 18t flight operations manual page 68 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. • switch the circuit breakers and radio compass on the...
Page 69
Yak 18t flight operations manual page 69 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. • tune the radio compass to the compass locator freque...
Page 70
Yak 18t flight operations manual page 70 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. • set the operation mode switches on the control panel...
Page 71
Yak 18t flight operations manual page 71 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. • after take-off and climbing, place the aircraft to t...
Page 72
Yak 18t flight operations manual page 72 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. Unit lights up on the console indicating the magnetic ...
Page 73
Yak 18t flight operations manual page 73 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. Indications that must be compared with those of the el...
Page 74
Yak 18t flight operations manual page 74 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. In flight the radio altimeter operates as follows – • ...
Page 75
Yak 18t flight operations manual page 75 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. Deflected to the left and occupy a space between 3 and...
Page 76
Yak 18t flight operations manual page 76 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. Establishing external communication by the user 1. A p...
Page 77
Yak 18t flight operations manual page 77 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. 2. If testing the wiper on dry glass, do not switch it...
Page 78
Yak 18t flight operations manual page 78 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. Airfield pressure with that one reported in the previo...
Page 79
Yak 18t flight operations manual page 79 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. 12.2.7 light facilities exterior equipment 1. The outs...
Page 80
Yak 18t flight operations manual page 80 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. 4. Prior to taxiing beginning, cut-in a low light (tax...
Page 81: Index
Yak 18t flight operations manual page 81 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. Index a aborted flight 14 aerial 23 aerials 23 aerobat...
Page 82
Yak 18t flight operations manual page 82 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. N navigation equipment 32, 34, 55 neutral position 23,...