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. ======================================================================== PREFLIGHT AND COCKPIT --------------------- CANOPY ** NOTE: 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. [ ] Use the little knob at the forward corner to close the canopy [ ] Make sure the canopy is fully home before takeoff ** NOTE: The canopies are allowed to be opened in flight. ENGINE START ------------ RADIAL ENGINE PRIMING AND START ** NOTE: Engine is turned over pneumatically. ** NOTE: 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. [ ] Charge the internal priming cylinder with fuel using the lever on the lower right of the cockpit [ ] Press the firing button on the left of the instrument panel TAXI AND POWER CHECKS --------------------- ** NOTE: Taxying the Yak C11 is straightforward; the aeroplane feels heavy on the ground. Toe brakes on this example make steering easier. [ ] Make sure cowl flaps are open ** WARNING: 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 ------- [ ] 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 [ ] Check Ts and Ps before rotation [ ] Rotate at 90 knots ............................................ 90 KT [ ] Once airborne, raise the gear [ ] Bring power back to 75% with the throttle and rpm lever [ ] Climb at 135 knots ........................................... 135 KT [ ] At max weight and max power, VSI will show 1,600 fpm ....... 1600 FPM CRUISE PERFORMANCE ------------------ [ ] At full throttle at 1,000 feet, speed is 225 knots TAS and fuel burn is 50 gallons per hour ... 225 KT / 50 GPH [ ] At 75% power, speed is 200 knots and fuel burn is 33 gallons per hour ... 200 KT / 33 GPH [ ] At 140 knots, fuel burn is 16 gallons per hour ...... 140 KT / 16 GPH DESCENT AND SLOWING DOWN ------------------------ ** NOTE: 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. [ ] Gear limit is 163 knots ...................................... 163 KT [ ] Flap limit is 135 knots ...................................... 135 KT APPROACH AND LANDING -------------------- ** NOTE: The best approach is a curved one; visibility over the nose is poor, and non-existent from the rear seat. [ ] Make a positive landing flare [ ] After touchdown, bring the stick back before applying large brake pressure to prevent a noseover STALL AND SPIN -------------- ** NOTE: The aeroplane exhibits a pronounced starboard wing drop in all configurations and power settings; severity depends on applied power. There is little warning buffet. ** NOTE: The aeroplane can flick into a steep, mind-numbing spin. Spin recovery is predictable and it comes out cleanly within 90 degrees of rotation. SPECIFICATIONS -------------- [ ] Vne .......................................................... 323 KT [ ] Length ....................................................... 8.56 M [ ] 70% cruise ................................................... 195 KT [ ] Max takeoff weight ......................................... 2,150 KG [ ] Stall speed ................................................... 83 KT [ ] Takeoff run ................................................... 575 M [ ] Wingspan ..................................................... 9.53 M [ ] Engine ............................................... ASH 21, 700 HP