# Yakovlev Yak-11 — yak11_fltrep11 # NOT FOR FLIGHT — source fidelity: unreviewed | operational review: none | completeness: full # Source: Yakovlev/Yak-11/yak11_fltrep11.txt # Rights: licensed # Checklist hash: 32421c321439645976b38f7269a0861ee9f7a84d98daed428c418a275ff6fd1f # Verify against the aircraft's own approved documentation before use. section_id phase criticality section_title item_index item_id type tickable memory_item indent text response condition detail preflight_inspection normal Preflight and Cockpit 0 subtitle no no 0 Canopy preflight_inspection normal Preflight and Cockpit 1 note no no 0 Do not use the overhead toggle to close the canopy; that releases the canopy securing pins and allows the whole canopy to fall off the rear of the fuselage. preflight_inspection normal Preflight and Cockpit 2 challenge yes no 0 Use the little knob at the forward corner to close the canopy preflight_inspection normal Preflight and Cockpit 3 challenge yes no 0 Make sure the canopy is fully home before takeoff preflight_inspection normal Preflight and Cockpit 4 note no no 0 The canopies are allowed to be opened in flight. engine_start normal Engine Start 0 subtitle no no 0 Radial engine priming and start engine_start normal Engine Start 1 note no no 0 Engine is turned over pneumatically. engine_start normal Engine Start 2 note no no 0 Pull-through to clear the bottom cylinders of oil still has to be done if the aeroplane has been left standing for a few hours. engine_start normal Engine Start 3 challenge yes no 0 Charge the internal priming cylinder with fuel using the lever on the lower right of the cockpit engine_start normal Engine Start 4 challenge yes no 0 Press the firing button on the left of the instrument panel taxi normal Taxi and Power Checks 0 note no no 0 Taxying the Yak C11 is straightforward; the aeroplane feels heavy on the ground. Toe brakes on this example make steering easier. taxi normal Taxi and Power Checks 1 challenge yes no 0 Make sure cowl flaps are open taxi normal Taxi and Power Checks 2 warning no no 0 Do not take off with cowl flaps closed. There are two types of Yak pilots — the ones who have taken off with the cowl flaps closed, and the ones who haven't yet but will. takeoff normal Takeoff 0 challenge yes no 0 Line up and allow the aircraft to run forward a few feet to make sure the automatic tailwheel lock engages with aft stick before applying full power takeoff normal Takeoff 1 challenge yes no 0 Check Ts and Ps before rotation takeoff normal Takeoff 2 action yes no 0 Rotate at 90 knots 90 KT takeoff normal Takeoff 3 challenge yes no 0 Once airborne, raise the gear takeoff normal Takeoff 4 challenge yes no 0 Bring power back to 75% with the throttle and rpm lever takeoff normal Takeoff 5 action yes no 0 Climb at 135 knots 135 KT takeoff normal Takeoff 6 action yes no 0 At max weight and max power, VSI will show 1,600 fpm 1600 FPM cruise normal Cruise Performance 0 action yes no 0 At full throttle at 1,000 feet, speed is 225 knots TAS and fuel burn is 50 gallons per hour 225 KT / 50 GPH cruise normal Cruise Performance 1 action yes no 0 At 75% power, speed is 200 knots and fuel burn is 33 gallons per hour 200 KT / 33 GPH cruise normal Cruise Performance 2 action yes no 0 At 140 knots, fuel burn is 16 gallons per hour 140 KT / 16 GPH descent normal Descent and Slowing Down 0 note no no 0 The Yak C11 is typically difficult to slow down and takes a while to get the airspeed low enough to meet the gear and flap limits, even with the throttle fully closed. descent normal Descent and Slowing Down 1 action yes no 0 Gear limit is 163 knots 163 KT descent normal Descent and Slowing Down 2 action yes no 0 Flap limit is 135 knots 135 KT approach normal Approach and Landing 0 note no no 0 The best approach is a curved one; visibility over the nose is poor, and non-existent from the rear seat. approach normal Approach and Landing 1 challenge yes no 0 Make a positive landing flare approach normal Approach and Landing 2 challenge yes no 0 After touchdown, bring the stick back before applying large brake pressure to prevent a noseover Stall and Spin normal Stall and Spin 0 note no no 0 The aeroplane exhibits a pronounced starboard wing drop in all configurations and power settings; severity depends on applied power. There is little warning buffet. Stall and Spin normal Stall and Spin 1 note no no 0 The aeroplane can flick into a steep, mind-numbing spin. Spin recovery is predictable and it comes out cleanly within 90 degrees of rotation. reference normal Specifications 0 action yes no 0 Vne 323 KT reference normal Specifications 1 action yes no 0 Length 8.56 M reference normal Specifications 2 action yes no 0 70% cruise 195 KT reference normal Specifications 3 action yes no 0 Max takeoff weight 2,150 KG reference normal Specifications 4 action yes no 0 Stall speed 83 KT reference normal Specifications 5 action yes no 0 Takeoff run 575 M reference normal Specifications 6 action yes no 0 Wingspan 9.53 M reference normal Specifications 7 action yes no 0 Engine ASH 21, 700 HP