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weight and performance calculations for the Ilyushin Il-62
***** PRELIMINARY FILE ****
CCCP-86682 c/n 90502 at Le Bourget, August 1974. The Kuznetsov NK-8-4
engine cowling difference little with the Il-62M, for this it can be distinguished
from the Il-62M.
Ilyushin Il-62
role : jet airliner
importance : ****
first flight : 3 January 1963 (CCCP-06156) operational : September 1967
country : Russia
NATO reporting name : CLASSIC
design : design team led by Sergei Ilyushin
production : 94 Il-62 aircraft at Kazan, total including 193 Il-62M and 5 prototypes : 292 aircraft
general information :
Designed to fly 7700 km (distance Moscow – New York) with more than 150 passengers and reserve fuel.
First flight was made with 73.55 [KN] Lyulka AL-7 turbojet engines, for the intended Kuznetsov NK-8-4 engines were not ready yet. At that moment it was the world largest jet airliner.
The prototype CCCP-06156 crashed on February 25, 1965 during a MTOW test flight. Couldn't
gain altitude after take-off and crashed, killing 10 of the 17 on board.
Early Il-62, looks like the prototype, CCCP-06156, without the nose probe
On September 15, 1967, it was deployed on the Moscow > Montreal route as a replacement for the Tu-114. July 1968 the route MOW > JFK is started.
In June 1965, the Il-62 (the third prototype CCCP-06176) was shown for the first time in the West, during the annual aviation exhibition at Le Bourget.
3 e prototype CCCP-06176 at Le Bourget, June 1965, getting a lot of attention. Early
Il-62 had a fearing below the nose.
In 1966 and 1967, the Il-62 was already in service on the domestic Aeroflot
network. On September 15, 1967, it was used for the first time on an
international route, namely that from Moscow to Montreal.
The Il-62 is almost identical in size and engine power to the British VC-10.
De Il-62 werd ontworpen voor 25.000 – 30.000 vlieguren en 7000 – 8000
cycles.
primary users : Aeroflot, CSA (7), Interflug (6), LOT (5), CAAC (5), Tarom (3), Cubana (1)
Accommodation:
flight crew : 5 cabin crew : 5
flight crew consist of captain, first officer, flight engineer and optionally a navigator and a radio officer
passengers : seating for 150 in two class : 12 business class and 138 coach class seats ( 34 -in pitch)
exit limit : 186 passengers
engine : 4 Kuznetsov NK-8-4 turbofan engines of 103.0 [KN] (23154.9 [lbf])
dimensions :
wingspan : 43.2 [m], length : 53.12 [m], height : 12.4 [m]
wing area : 279.6 [m^2] fuselage exterior width : 4.1 [m]
Aeroflot CCCP-06176, Il-62 third prototype
weights :
empty weight : 66400 [kg]
operating empty weight : 69400 [kg] max. structural payload : 24100 [kg]
Zero Fuel weight (ZFW) : 93500 [kg] max. landing weight (MLW) : 105000 [kg]
max.take-off weight : 157500 [kg] weight fuel : 80000 [kg] (100000 [liter])
performance :
Max. operating Mach number (Mmo) : 0.84 [Mach] (900 [km/hr]) at 10000 [m]
normal cruise speed : 870 [km/hr] (Mach 0.81 ) at 10500 [m] (34 [%] power)
economic cruise speed : 850 [km/hr] (Mach 0.80 ) at 10500 [m]
service ceiling : 13000 [m]
range with max fuel : 9200 [km] (ATA domestic fuel reserves - 820.0 [km] alternate)
description :
low-wing cantilever monoplane with retractable landing gear with nose wheel
tapered multi-cellular wing with flush-riveted stressed skin
with double slotted flaps with no leading edge flaps and spoilers airfoil : Tupolev
sweep angle 3/4 chord: 35.0 [°]
Line-up of Il-62’s, CCCP-86679 in the back ground
engines attached to the tail, landing gear attached to the wings, fuel tanks in the wings and wing center section
construction : all-metal aluminium-alloy stressed-skin construction with pressurized fuselage
fuselage shape : 0
calculation : *1* (dimensions)
wing chord : 6.47 [m]
mean wing chord : 6.47 [m]
calculated average wing chord tapered wing with rounded tips: 6.44 [m]
wing aspect ratio : 6.67 []
seize (span*length*height) : 28341 [m^3]
calculation : *2* (fuel consumption)
oil consumption : 12.4 [kg/hr]
fuel consumption (econ. cruise speed) : 6786.4 [kg/hr] (8483.0 [litre/hr]) at 21 [%] power
distance flown for 1 kg fuel : 0.13 [km/kg] at 10500 [m] height, sfc : 77.0 [kg/KN/h]
total fuel capacity : 100000 [litre] (80000 [kg])
calculation : *3* (weight)
weight engine(s) dry : 9600.0 [kg] = 23.30 [kg/KN]
weight 204 litre oil tank : 17.35 [kg]
oil tank filled with 2.6 litre oil : 2.3 [kg]
oil in engine 5.0 litre oil : 4.5 [kg]
fuel in engine 22.5 litre fuel : 16.48 [kg]
weight fuel lines 159.6 [kg]
weight engine cowling 1071.2 [kg]
weight thrust reversers 164.8 [kg]
total weight propulsion system : 11036 [kg](7.0 [%])
***************************************************************
Accommodation cabin facilities:
typical 2-class cabin layout for 150 passengers : economy : pitch : 86.4 [cm] ( 3+3 ) seating in 25.4 rows
weight seats : 800.0 [kg]
high density seating passengers : 186 [m2/pax] at 6 -abreast seating in 31.0 rows, pitch 86.4 [cm]
pax density, normal seating : 0.72 [m2/pax], high density seating : 0.58 [m2/pax]
weight 5 toilets : 72.9 [kg]
weight 1 galleys : 110.0 [kg]
weight overhead stowage for hand luggage : 52.5 [kg]
weight 3 wardrobe closets : 30.0 [kg]
weight 53 windows : 47.5 [kg]
weight 4 1.83x0.86 [m] entrance/exit doors : 254.2 [kg]
weight 2 freight doors (belly) : 101.0 [kg]
cabin volume (usable), excluding flight deck : 228.55 [m3]
passenger cabin max.width : 3.49 [m] cabin length : 34.22 [m] cabin height : 2.12 [m]
floor area : 107.6 [m2]
weight cabin facilities : 1468.0 [kg]
Interior of Interflug Il-62 DDR-SEG c/n 31403. This aircraft was in service
from 1973 till 1989. It is on display on the grass strip at Stolln-Rhinow
safety facilities:
weight 4 over wing emergency exits : 121.1 [kg]
weight 8 hand fire extinguisher : 23 [kg]
weight lifejackets : 67.5 [kg]
weight cockpit voice recorder (CVR) and flight data recorder (FDR): 20.0 [kg]
weight oxygen masks & oxygen generators : 97.5 [kg]
weight emergency flare installation : 10 [kg]
weight 4 emergency evacuation slides : 76.9 [kg]
weight safety equipment & facilities : 416 [kg]
fuselage construction:
fuselage aluminium frame : 17903 [kg]
floor loading (payload/m2): 224 [kg/m2]
weight rear pressure bulkhead : 195.3 [kg]
fuselage covering ( 443.3 [m2] duraluminium 3.43 [mm]) : 4028.9 [kg]
weight floor beams : 617.6 [kg]
weight cabin furbishing : 904.1 [kg]
weight cabin floor : 1633.7 [kg]
fuselage (sound proof) isolation : 322.7 [kg]
weight 13740 [litre] main central fuel tanks empty : 769.4 [kg]
weight engine mounts : 206 [kg]
weight fuselage structure : 26580.5 [kg]
cockpit Il-62 CCCP-86698, the aircraft was on display in Kiev, at the old city airport Zhulyany. Due to the 2022 Russian – Ukrainian war, I wonder if it is still there intact.
Avionics:
weight HF and UHF radio : 7.0 [kg]
weight dual cloud-collision radar : 25.0 [kg]
weight VOR/ILS,RMI,Doppler,radio altimeter : 12.0 [kg]
weight automatic flight control System / auto-pilot : 23.0 [kg]
weight artificial horizons, compass, alti-meters : 7 [kg]
weight engine monitoring gauches & control switches : 12 [kg]
weight avionics : 86.0 [kg]
Systems:
Air-conditioning and pressurisation system maintains sea level conditions up to 7100 [m] and gives equivalent of 2100 [m] at 12500 [m]. pressure differential : 0.62 [bars] (kg/cm2)
weight air-conditioning and pressurisation system : 238 [kg]
weight APU / engine starter: 51.5 [kg]
weight lighting : 49.5 [kg]
weight engine-driven 40kVA electricity generators : 37.5 [kg]
weight controls : 21.6 [kg]
weight systems : 398.4 [kg]
total weight fuselage : 28949 [kg](18.4 [%])
***************************************************************
total weight aluminium ribs (1243 ribs) : 5617 [kg]
weight 6 fuel tanks empty for total 86260 [litre] fuel : 4831 [kg]
weight wing covering (painted aluminium 2.21 [mm]) : 3337 [kg]
total weight aluminium spars (multi-cellular wing structure) : 4259 [kg]
weight wings : 13212 [kg]
weight wing/square meter : 47.25 [kg]
weight thermal leading-edge anti-icing : 47.5 [kg]
weight fin & rudder (21.7 [m2]) : 1026.8 [kg]
weight stabilizer & elevator (31.5 [m2]): 1488.4 [kg]
weight flight control hydraulic servo actuators: 68.5 [kg]
weight double slotted flaps (43.8 [m2]) : 883.8 [kg]
weight spoilers (9.5 [m2]) : 39.4 [kg]
total weight wing surfaces & bracing : 21597 [kg] (13.7 [%])
*******************************************************************
CAAC Il-62 B-2022 c/n 11005, March 1980 at Shanghai-Hongqiao
Can only operate from paved runways
wheel pressure : 17325.0 [kg]
weight 8 main wheels (1450 [mm] by 450 [mm]) : 1200.7 [kg]
tyre pressure main wheels :9.31 [Bar] (nitrogen)
weight 2 nose wheels : 150.1 [kg]
weight mult-disc wheel-brakes : 93.5 [kg]
weight flywheel detector type anti-skid units : 9.0 [kg]
weight oleo-pneumatic shock absorbers : 124.7 [kg]
weight wheel hydraulic operated retraction system : 1277.8 [kg]
weight undercarriage struts (four-wheel bogies) with axle 3469.2 [kg]
total weight landing gear : 6325.0 [kg] (4.0 [%]
*******************************************************************
********************************************************************
calculated empty weight : 67907 [kg](43.1 [%])
weight oil for 12.7 hours flying : 175.4 [kg]
weight catering : 275.0 [kg]
weight water : 110.0 [kg]
weight crew : 810 [kg]
weight crew lugage,nav.chards,flight doc.,miscell.items : 123 [kg]
operational weight empty : 69400 [kg] (44.1 [%])
********************************************************************
weight 150 passengers : 11550 [kg]
weight luggage : 2400 [kg]
weight cargo : 10150 [kg]
zero fuel weight (ZFW): 93500 [kg](59.4 [%])
weight fuel for landing (1.7 hours flying) : 11500 [kg]
max. landing weight (MLW): 105000 [kg](66.7 [%])
max. fuel weight : 149400 [kg] (94.9 [%])
payload with max fuel : 87 passengers+luggage 8100 [kg]
published maximum take-off weight : 157500 [kg] (100.0 [%])
Tarom Il-62 YR-IRB
calculation : * 4 * (engine power)
power loading (Take-off) : 382 [kg/KN]
power loading (operational without useful load) : 319 [kg/kN]
power loading (Take-off) 1 PUF: 510 [kg/KN]
max. total take-off power : 412.0 [KN]
calculation : *5* (loads)
manoeuvre load : 5.5 [g] at 1000 [m]
limit load : 3.0 [g] ultimate load : 4.5 [g] load factor : 0.7 [g]
design flight time : 3.67 [hours]
design cycles : 7477 sorties, design hours : 27412 [hours]
max. wing loading (MTOW & flaps retracted) : 563 [kg/m2]
wing stress take-off : 175 [N/kg] (1.5g remous/manoeuvring)
wing stress (2 g) during operation : 195 [N/kg] at 2g emergency manoeuvre
calculation : *6* (angles of attack)
angle of attack zero lift : -1.83 ["]
max. angle of attack (stalling angle, clean) : 12.14 ["]
max. angle of attack (full flaps) : 11.34 ["]
angle of attack at max. speed : 2.53 ["]
On August 14, 1972, Interflug's Il-62 DM-SEA c/n 00702 crashed near Konigs Wusterhausen. Flight from Berlin-Schonefeld (SXF) to Burgas (BOJ), Bulgaria, with DDR-Black Sea tourists. When it had climbed to 8900m 13 min. after TO, the crew reports problems with the ailerons. Crew decides to return immediately. A hot air tube in the tail section had caused electrical cables to melt, after which a short circuit occurred and a fire broke out. Soon after, the aircraft becomes uncontrollable. Crew did not know that there was a fire otherwise they would have tried to land the plane faster. Crashed 30 min after TO in field 15km SE of Berlin. All 148 passengers and 8 crew members are killed.
1st flight : 1970, 3520 flight hours. Location : +-50m 52°18'25.14"N 13°41’19.29”E
calculation : *7* (lift & drag ratios
lift coefficient at angle of attack 0° : 0.15 [ ]
lift coefficient at max. speed : 0.36 [ ]
lift coefficient at max. angle of attack : 1.14 [ ]
max. lift coefficient full flaps : 1.69 [ ]
drag coefficient at max. speed : 0.0280 [ ]
drag coefficient at econ. cruise speed : 0.0292 [ ]
induced drag coefficient at econ. cruise speed : 0.0092 [ ]
drag coefficient (zero lift) : 0.0200 [ ]
lift/drag ratio at max. speed : 12.73 [ ]
calculation : *8* (speeds
stalling speed clean at sea-level (OW loaded : 150714 [kg]): 313 [km/u]
stalling speed at sea-level with full flaps (normal landing weight): 200 [km/u]
landing speed at sea-level (normal landing weight : 104808 [kg]): 230 [km/hr]
max. rate of climb speed : 681 [km/hr] at sea-level
max. endurance speed : 497 [km/u] min. fuel/hr : 6306 [kg/hr] at height : 4572 [m]
max. range speed : 899 [km/u] min. fuel consumption : 7.295 [kg/km] at cruise height : 12192 [m]
cruising speed : 870 [km/hr] at 10500 [m] (power:22 [%])
max. operational speed (Mmo) : 900.00 [km/hr] (Mach 0.84 ) at 10000 [m] (power:23.1 [%])
airflow at cruise speed per engine : 153.0 [kg/s]
Aeroflot's Il-62 CCCP-86671 c/n 70301 crashed, near the village of Ozeretskoye in Russia, 1km east of lake Nerskoye on October 13, 1972, , during the third approach in bad weather 6km east of Moscow-Sheremetyevo airport. Flight from Paris via Leningrad (LED) to Moskou (SVO) with 164 passengers and 10 crew members. All were killed. The ILS system did not work that night. 1st flight : 1967 Location : +-25m 56°04'50.18"N 37°24'38.57"E
speed of thrust jet : 1398 [km/hr]
climbing speed at sea-level (loaded) : 1858 [m/min]
climbing speed at 1000 [m] with 1 engine out (PUF / MTOW) : 1205 [m/min]
climbing speed at 1000 [m] with 2 engines out (2xPUF / MTOW) : 479 [m/min]
calculation : *9* (regarding various performances)
take-off speed : 373.1 [km/u]
high wheel pressure, can only take off from paved runways
take-off distance at sea-level concrete runway : 3144 [m]
take-off distance at sea-level over 15 [m] height : 3236 [m]
landing run : 827 [m]
landing run (C.A.R.) from 15 [m] : 1146 [m]
lift/drag ratio : 14.07 [ ]
climb to 5000 [m] with max payload : 2.86 [min]
climb to 10000 [m] with max payload : 4.80 [min]
theoretical ceiling fully loaded (mtow- 60 min. fuel:150714 [kg] ) : 15100 [m]
calculation *10* (action radius & endurance)
range with max. payload: 7675 [km] with 24100.0 [kg] max. useful load (80.0 [%] fuel)
range with high density pax: 8650 [km] with 186 passengers (88.5 [%] fuel)
range with typical two-class pax: 9142 [km] with 150 passengers (92.7 [%] fuel)
range with max.fuel : 10020 [km] with 10 crew and 87 [kg] passengers and 100.0 [%] fuel
ferry range : 10502 [km] with 5 crew and zero payload (100.0 [%] fuel)
max range theoretically with additional fuel tanks total 111112.4 [litre] fuel : 11400 [km]
Available Seat Kilometres (ASK) : 1371305 [paskm]
useful load with range 1000km : 24100 [kg]
useful load with range 1000km : 186 passengers
production (theor.max load): 20967 [tonkm/hour]
production (useful load): 20967 [tonkm/hour]
production (passengers): 130500 [paskm/hour]
oil and fuel consumption per tonkm : 0.324 [kg]
OK-DBF at Schiphol airport, May 1975
On August 20, 1975, the Il-62 OK-DBF "Brno Trade Fair" of the CSA crashed near Damascus. Operated Flight 540 from Prague (PRG) to Damascus (DAM) with 117 passengers and 11 crew members. Flies during approach of RW23R in good weather against the ground, 17 km NE from Damascus airport at 650m altitude on the edge of dry lake Uteibe. All 126 passengers were killed. c/n 31502, first flight : 1973. Crew probably confused QNH with QFE. Location -+ 1km 33°31'44"N 36°40'43"E
The sad remains of OK-DBF
Il-62 SP-LAA at Le Bourget, France.
On March 14, 1980, the Il-62 SP-LAA "Kopernik" c/n 11004 of the LOT crashed near Warsaw. There are 87 deaths. On the approach to RW15 of Warsaw int'l apt. (WAW), after a 7257km flight from New York, the crew has problems with the landing gear, which does not want to lock. They decide to make a re-start. However, if they increase power, engine No.2 breaks into pieces, damaging control cables. The aircraft becomes uncontrollable and dives into the ground, killing all 77 passengers and 10 crew members. Cause metal fatigue in the turbine disk of engine no.2. first flight : 1971 Location : +-50m 52°11'06.24"N 20°56'56.56"E
fuel cost per paskm : 0.052 [eur]
crew cost per paskm : 0.010 [eur]
economic hours : 22300 [hours] is less then design hours
time between engine failure : 481 [hr]
can continue fly on 3 engines, low risk for emergency landing for PUF
writing off per paskm : 0.019 [eur]
insurance per paskm : 0.0010 [eur]
maintenance cost per paskm : 0.019 [eur]
direct operating cost per paskm : 0.101 [eur]
direct operating cost per tonkm (max. load): 0.631 [eur]
direct operating cost per tonkm (normal useful load): 0.631 [eur]
Le
CCCP-06176 on display at Le Bourget, Paris Air Salon, 1965
Literature :
Jane’s all the world aircraft 1964-’65 page 318
Bekende vliegtuigen van Rusland en Italië page 87
Sowiet engines page 9
Waarom vloog de KLM met Ilyushin Il-62's? - Up in the Sky
Jane’s commercial transport aircraft page 167
How Air France in 1968 flew the Soviet Il-62 | flight attendant | Zen (dzen.ru)
Verkeersvliegtuigen page 55
The flier’s handbook page 113
http://foto-i-mir.ru/il-62/
Jane’s all the world aircraft 1979-1980 page185
Verkeersvliegtuigen (Moussault) page 90,158
Aviation Disasters/D.Gero
Alles over Russische vliegtuigen page 93
Heritage Special: The Il-62, Russia's First Long Haul Jetliner - SamChui.com
AFC - Aviation Fan Club (aviation-fan-club.com)
"We landed," he said, and died. Only two survived the CSA crash 36 years ago - iDNES.cz
The Secret Tragedy of csa flight | News | Tiscali.cz
Aeroflot CCCP-86613 c/n 51901 was written off after an emergency landing on 21 November 1990 at Yakutsk-Magan airport. On a flight from Moscow to Yakutsk, with 179 passengers and 10 crew it had to divert to Magan apt. due to bad weather. It landed halfway the runway in snowy conditions. It was not able to stop in time and ran off the runway, it landing gear broke off and then the aircraft came to rest 538m past the RW. There were no fatalities. with The tail is all that is left of the aircraft, but it gives an insight in the IL-62 construction.
Location: +- 500m : 62°05’38”N 129°32’55”E
Il-62 prototype CCCP-06156, flying without probe in the nose
DISCLAIMER Above calculations are based on published data, they must be
regarded as indication not as facts.
Calculated performance and weight may not correspond with actual weights
and performances and are assumptions for which no responsibility can be taken.
Calculations are as accurate as possible, they can be fine-tuned when more data
is available, you are welcome to give suggestions and additional information
so we can improve our program. For copyright on drawings/photographs/
content please mail to below mail address
(c) B van der Zalm 22 October 2022 contact : info.aircraftinvestigation@gmail.com python 3.7.4