#	Yakovlev Yak 50 — yak50_fltrep50
#	NOT FOR FLIGHT — source fidelity: unreviewed | operational review: none | completeness: full
#	Source: Yakovlev/Yak 50/yak50_fltrep50.txt
#	Rights: licensed
#	Checklist hash: 72724063fec855cdfc319465613054c67fdc12445136a42ad32760c202c98b88
#	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
	Aircraft Description	normal	Aircraft Description	0		subtitle	no	no	0	General			
	Aircraft Description	normal	Aircraft Description	1		note	no	no	0	The Yak 50 is an all-metal tail dragger designed solely for advanced aerobatics training and competition.			
	Aircraft Description	normal	Aircraft Description	2		note	no	no	0	The fuselage is semi monocoque, a combination of stressed skin and steel re-enforcement.			
	Aircraft Description	normal	Aircraft Description	3		note	no	no	0	The strong but simple main gear is semi-retractable, the lockable tailwheel permanently extended.			
	Aircraft Description	normal	Aircraft Description	4		note	no	no	0	The Yak 50 has no flaps.			
	Aircraft Description	normal	Aircraft Description	5		note	no	no	0	Flying controls are conventional and operated by control cables for the elevator and rudder, push rods for the ailerons.			
	Aircraft Description	normal	Aircraft Description	6		note	no	no	0	Only the elevator trim is adjustable in flight, the rudder and ailerons served by fixed tabs which are manipulated on the ground.			
	Aircraft Description	normal	Aircraft Description	7		subtitle	no	no	0	Engine Power			
	Aircraft Description	normal	Aircraft Description	8		note	no	no	0	Powerplant: Ivchenko M14 radial, supercharged nine cylinder radial, 360hp at max rpm.			
	Aircraft Description	normal	Aircraft Description	9		note	no	no	0	Propeller: variable pitched two-bladed paddle via a simple gearbox.			
	Aircraft Description	normal	Aircraft Description	10		note	no	no	0	Fuel capacity on the basic aircraft is 11.4 imperial gallons contained in a single tank mounted aft of the firewall.			
	Aircraft Description	normal	Aircraft Description	11		note	no	no	0	Maximum flight endurance is quoted as 50 minutes and this figure can be halved during advanced aerobatic flights.			
	Aircraft Description	normal	Aircraft Description	12		note	no	no	0	A welcome mod fitted to the vast majority of Yak 50s is the installation of a cruise tank which more than doubles the fuel capacity, although the G limits are reduced when full fuel is carried.			
	Aircraft Description	normal	Aircraft Description	13		note	no	no	0	The Yak 50 uses pneumatics for engine starting, gear and brake operation.			
	Aircraft Description	normal	Aircraft Description	14		note	no	no	0	The aircraft's air bottle will give around 12 start attempts before a recharge is necessary and a reserve bottle is also installed for emergency gear extension.			
	Aircraft Description	normal	Aircraft Description	15		note	no	no	0	The main bottle gets recharged automatically once the engine has started.			
	Aircraft Description	normal	Aircraft Description	16		subtitle	no	no	0	Cockpit			
	Aircraft Description	normal	Aircraft Description	17		note	no	no	0	The undercarriage lever is positioned on the left of the main panel, two green lights confirming that the gear is down and locked when the aircraft is on the ground.			
	Aircraft Description	normal	Aircraft Description	18		note	no	no	0	The throttle, rpm and lock lever form a meaty quadrant on the left shelf with another panel ahead comprising levers for the engine cooling gills and oil cooler flap.			
	Aircraft Description	normal	Aircraft Description	19		note	no	no	0	For most of the year the cooling levers will reside in the fully forward (open) position.			
	Aircraft Description	normal	Aircraft Description	20		note	no	no	0	The big red lever is the fuel shut off, replacing the emergency function of a mixture lever. Fuel mixture control is fully automatic.			
	Aircraft Description	normal	Aircraft Description	21		note	no	no	0	The instrument panel uses metric units. Most owners replace the altimeter since it reads in meters. The airspeed indicator reads in km/h.			
	Aircraft Description	normal	Aircraft Description	22		note	no	no	0	The engine has two main control indicators: an rpm gauge reading from 0 to 100%, and a manifold pressure gauge reading in mm of mercury.			
	Aircraft Description	normal	Aircraft Description	23		note	no	no	0	The Yak 50's electrics are in the centre of the panel and the fuel primer is located to the top right.			
	Aircraft Description	normal	Aircraft Description	24		note	no	no	0	The mag switch is mounted on the left of the panel next to the engine starter button.			
	preflight_inspection	normal	Preflight / Before Entering Cockpit	0		note	no	no	0	Climbing into the cockpit and strapping into the chunky five point harness, one is immediately aware of the ruggedness of the Yak 50.			
	preflight_inspection	normal	Preflight / Before Entering Cockpit	1		note	no	no	0	Visibility from the cockpit is excellent in every direction except forwards.			
	engine_start	normal	Engine Start	0		action	yes	no	0	Battery master	OFF		
	engine_start	normal	Engine Start	1		action	yes	no	0	Ignition and mags	OFF		
	engine_start	normal	Engine Start	2		action	yes	no	0	Primer lever	TURN LEFT		
	engine_start	normal	Engine Start	3		action	yes	no	0	Primer pump	PUMP 5 TIMES		
	engine_start	normal	Engine Start	4		action	yes	no	0	Primer lever	TURN RIGHT		
	engine_start	normal	Engine Start	5		action	yes	no	0	Primer pump while helper turns prop	PUMP SIMULTANEOUSLY		
	engine_start	normal	Engine Start	6		action	yes	no	0	Prop blades past windscreen	9 BLADES		
	engine_start	normal	Engine Start	7		action	yes	no	0	Prop turner	CLEAR		
	engine_start	normal	Engine Start	8		action	yes	no	0	Battery, ignition and generator	ON		
	engine_start	normal	Engine Start	9		action	yes	no	0	Throttle	OPEN 2 INCHES		
	engine_start	normal	Engine Start	10		action	yes	no	0	Starter switch	HIT		
	engine_start	normal	Engine Start	11		action	yes	no	0	As engine fires, mags	BOTH		
	engine_start	normal	Engine Start	12		action	yes	no	0	Keep engine going with primer pumps	LIBERAL PUMPS		
	engine_start	normal	Engine Start	13		caution	no	no	0	Don't bother pumping the throttle – no accelerator pump is fitted and this will have zero effect.			
	engine_start	normal	Engine Start	14		caution	no	no	0	After start, leave the primer centralised, not turned to the right. Result of leaving it right: rough running engine, excessive fuel burn and early engine overhaul.			
	after_start	normal	After Start / Warm Up	0		action	yes	no	0	After a few seconds the engine settles down	CHECK		
	after_start	normal	After Start / Warm Up	1		action	yes	no	0	Switches	SET		
	after_start	normal	After Start / Warm Up	2		action	yes	no	0	Radio	ADJUST		
	after_start	normal	After Start / Warm Up	3		action	yes	no	0	Straps	RETIGHTEN		
	after_start	normal	After Start / Warm Up	4		note	no	no	0	A cold Ivchenko does not warm up to taxying temperature in less than five minutes, with ten minutes being more typical on a standard UK day.			
	after_start	normal	After Start / Warm Up	5		action	yes	no	0	Oil temperature reaches 40 degree point	WAIT		
	after_start	normal	After Start / Warm Up	6		action	yes	no	0	Engine run	DO		
	taxi	normal	Taxi	0		note	no	no	0	Differential braking is applied by a stick-mounted hand lever and controlled by the amount of rudder applied away from its neutral position.			
	taxi	normal	Taxi	1		note	no	no	0	With the stick in the aft position, the Yak 50's tailwheel will lock straight.			
	taxi	normal	Taxi	2		caution	no	no	0	To turn, push the stick forward; taxying with the stick aft locks the tailwheel straight.			
	before_takeoff	normal	Before Takeoff	0		action	yes	no	0	Throttle and rpm levers	FULLY FORWARD		
	before_takeoff	normal	Before Takeoff	1		action	yes	no	0	Left rudder (prop goes round the 'wrong' way)	PUSH		
	before_takeoff	normal	Before Takeoff	2		action	yes	no	0	Throttle	ADVANCE FULL FORWARD		
	takeoff	normal	Takeoff	0		action	yes	no	0	Once aircraft is underway, stick	FORWARD TO RAISE TAIL		
	takeoff	normal	Takeoff	1		note	no	no	0	Take-off roll is around 100 metres at MTOW.			
	takeoff	normal	Takeoff	2		note	no	no	0	Climbs at 3,000 feet per minute.			
	after_takeoff	normal	After Takeoff / Climb	0		action	yes	no	0	Gear	RAISE BEFORE 200 KM/H		
	after_takeoff	normal	After Takeoff / Climb	1		action	yes	no	0	Prop rpm	REDUCE TO MAX 82%		
	after_takeoff	normal	After Takeoff / Climb	2		note	no	no	0	A more modest '70%, 70mm' setting conserves engine life.			
	cruise	normal	Cruise	0		note	no	no	0	In the cruise any 'square' setting will do, for example, for 70 on the manifold gauge set 70% rpm, for 60 manifold set 60%.			
	cruise	normal	Cruise	1		action	yes	no	0	Cruise speed	UP TO 280 KM/H (151 KT)		
	cruise	normal	Cruise	2		note	no	no	0	Full throttle and 82% are the quoted maximum continuous power setting, giving max level speed of 300 km/h (162 Kt).			
	cruise	normal	Cruise	3		note	no	no	0	Major engine overhaul every 500 hours.			
	descent	normal	Descent / Circuit	0		note	no	no	0	In the circuit the Yak is easy to operate. The sum total of good all-round visibility, draggy aeroplane and high power results in a slick approach every time.			
	approach	normal	Approach	0		action	yes	no	0	Undercarriage	LOWER AT 200 KM/H OR LESS		
	approach	normal	Approach	1		action	yes	no	0	Approach speed	150 KM/H		
	approach	normal	Approach	2		action	yes	no	0	Threshold speed	100 KM/H		
	approach	normal	Approach	3		note	no	no	0	The speed reduction on finals requires the throttle to be closed early and the aircraft held off until the speed bleeds back.			
	landing	normal	Landing	0		caution	no	no	0	The Yak's large wing and short undercarriage can cause an excessive float if the airspeed is too high on landing.			
	landing	normal	Landing	1		note	no	no	0	With repeated practise the Yak can be brought to a halt in 150 metres on a dry surface.			
	Control Harmony and Aerobatics	normal	Control Harmony and Aerobatics	0		note	no	no	0	Control harmony is typically 3.2.3 for ailerons, elevator and rudder instead of the classical 1,2,3.			
	Control Harmony and Aerobatics	normal	Control Harmony and Aerobatics	1		note	no	no	0	Spades are an option on the Yak 50, recommended for serious aerobatic pilots.			
	Control Harmony and Aerobatics	normal	Control Harmony and Aerobatics	2		note	no	no	0	In pitch the Yak 50's stick force per G is very light; pulling up to the nine G maximum does not require excessive strength.			
	Control Harmony and Aerobatics	normal	Control Harmony and Aerobatics	3		note	no	no	0	During advanced aerobatics many pilots release the throttle to fly with two hands on the stick.			
	Control Harmony and Aerobatics	normal	Control Harmony and Aerobatics	4		note	no	no	0	With the aircraft wound up to its Vno of 400 km/h (226kt) the Yak 50 can perform huge lazy loops, barrel rolls and wing overs with low G forces.			
	Control Harmony and Aerobatics	normal	Control Harmony and Aerobatics	5		note	no	no	0	Stalls and spins are surprisingly docile. Stall and spin recovery are predictable and standard. Some advanced aerobats have to be positively wrestled out of an established spin; the Yak 50 is one of the exceptions.			
	Fuel and Range	normal	Fuel and Range	0		note	no	no	0	With a standard 55 litre fuel tank fitted, an airfield will be needed every 60nm when cruising at 162kt.			
	Fuel and Range	normal	Fuel and Range	1		note	no	no	0	A more sedate 200 km/h (108kt) improves the range to 85nm.			
	Fuel and Range	normal	Fuel and Range	2		note	no	no	0	With a cruise tank fitted the aircraft's best range jumps to 250nm at economy cruise.			
	Fuel and Range	normal	Fuel and Range	3		note	no	no	0	Given such a short range, a GPS is a very desirable installation for a Yak 50.			
	Specifications	normal	Specifications — Yak 50	0		subtitle	no	no	0	External Dimensions			
	Specifications	normal	Specifications — Yak 50	1		action	yes	no	0	Span	31 FT 3 IN		
	Specifications	normal	Specifications — Yak 50	2		action	yes	no	0	Length	24 FT 5 IN		
	Specifications	normal	Specifications — Yak 50	3		action	yes	no	0	Wing area	161 SQ FT		
	Specifications	normal	Specifications — Yak 50	4		subtitle	no	no	0	Weights and Loadings			
	Specifications	normal	Specifications — Yak 50	5		action	yes	no	0	Empty weight	1,624 LB		
	Specifications	normal	Specifications — Yak 50	6		action	yes	no	0	Useful load	496 LB* / 377 LB		
	Specifications	normal	Specifications — Yak 50	7		action	yes	no	0	Gross weight	2,120 LB / 2,001 LB		
	Specifications	normal	Specifications — Yak 50	8		action	yes	no	0	Power loading	5.9 LB/HP		
	Specifications	normal	Specifications — Yak 50	9		action	yes	no	0	Wing loading	13.1 LB/SQ FT		
	Specifications	normal	Specifications — Yak 50	10		action	yes	no	0	Fuel capacity	26.2 IMP GALLONS		
	Specifications	normal	Specifications — Yak 50	11		action	yes	no	0	G limits	+9G / -6.6G		
	Specifications	normal	Specifications — Yak 50	12		action	yes	no	0	Number of seats	1		
	Specifications	normal	Specifications — Yak 50	13		note	no	no	0	(*denotes aerobatic figures)			
	Specifications	normal	Specifications — Yak 50	14		subtitle	no	no	0	Power			
	Specifications	normal	Specifications — Yak 50	15		action	yes	no	0	Engine manufacturer/type	IVCHENKO (VEDENEYEV) M14P		
	Specifications	normal	Specifications — Yak 50	16		action	yes	no	0	Max power	360 HP @ 2,900 PROP RPM		
	Specifications	normal	Specifications — Yak 50	17		action	yes	no	0	Propeller type and diameter	2-BLADE VP 94.2 IN		
	Specifications	normal	Specifications — Yak 50	18		subtitle	no	no	0	Performance			
	Specifications	normal	Specifications — Yak 50	19		action	yes	no	0	Vne	232 KT		
	Specifications	normal	Specifications — Yak 50	20		action	yes	no	0	Maximum level speed	162 KT		
	Specifications	normal	Specifications — Yak 50	21		action	yes	no	0	Cruise speed @ 75%	151 KT		
	Specifications	normal	Specifications — Yak 50	22		action	yes	no	0	Stall speed, power off	48 KT		
	Specifications	normal	Specifications — Yak 50	23		action	yes	no	0	Stall speed, power on	45 KT		
	Specifications	normal	Specifications — Yak 50	24		action	yes	no	0	Rate of climb (sea level)	3,000 FT/MIN		
	Specifications	normal	Specifications — Yak 50	25		action	yes	no	0	Ceiling (oxygen limited)	10,000 FT		
	Specifications	normal	Specifications — Yak 50	26		action	yes	no	0	Take off run	328 FT		
	Specifications	normal	Specifications — Yak 50	27		action	yes	no	0	Landing run	492 FT		
	Specifications	normal	Specifications — Yak 50	28		action	yes	no	0	Range (cruise tank, 45 min reserve)	200 NM		
	Specifications	normal	Specifications — Yak 50	29		action	yes	no	0	Endurance	2.5 HR		
	Specifications	normal	Specifications — Yak 50	30		subtitle	no	no	0	Price			
	Specifications	normal	Specifications — Yak 50	31		action	yes	no	0	Price	£35,000-£45,000		
	Specifications	normal	Specifications — Yak 50	32		action	yes	no	0	UK suppliers	MARK AND JOHN JEFFERIES AT YAK UK, LITTLE GRANSDEN AIRFIELD, BEDFORDSHIRE. TELEPHONE (01767) 651156