Gates Lear 36 / U-36
Compared with the Learjet 25s, the new Learjet 35 and Learjet 36 each had a 0.33m increase in length and, a 0.61m extension to each wingtip, outboard of the ailerons. They differed in fuel/seating capacity, the Learjet 36 seating up to six passengers but with the ability to trade two of them for the extra fuel to give non-stop capability across the North Atlantic.
The pilot on the first flight of the Learjet 26 (later designated the Learjet 36) with two TFE engines took place on 4 January 1973, piloted by Bob Fisher and Robert Berry.
Certification was gained and the first deliveries made in 1974. Two years later golf professional/ pilot Arnold Palmer used a Learjet 36 to establish a new round-the-world class record of 36990km completed in an elapsed time of 57 hours 25 minutes 42 seconds.
Gates Learjet expanded the slow-speed boundaries of their entire bizjet line by certificating their Century III wing leading edge and flight control system modification. Aircraft with the modification bear the designation "A" following their model numbers. The Century III modifications on model 35s and 36s reduced the stalling speed and gave better low-speed flying qualities.
The JMSDF has procured a number of Learjet 36As, known as U-36As, for target-towing, sea-skimming-missile simu-lation, and ECM. These aircraft have an under-fuselage radome for a surveillance radar, a tip-tank-mounted missile seeker simulator, jammer pods, and chaff dispensers. Under-wing stores capability is improved, and maximum take-off weight is increased.
By 1991 around 750 Learjet Model 35/36 variants had been sold, including approximately 200 special mission versions to 20 customers around the world.
Engines: 2 x Garrett AiResearch TFE 731-2 turbofan.
MTOW: 17,000 lb.
LR-36A Learjet Century III 36A
Engines: 2 x Garrett TFE 731-2-2B, 3500 lbs / 1588kg thrust.
Length: 14.83 m / 48 ft 8 in
Height: 3.73 m / 12 ft 3 in
Wingspan: 12.04 m / 39 ft 6 in
Wing area: 23.53 sq.m / 253.27 sq ft
Wing aspect ratio: 6.2.
Maximum ramp weight: 18,550 lbs.
Maximum takeoff weight: 18,300 lb / 8301 kg
Standard empty weight: 9970 lbs.
Maximum useful load: 5850 lbs.
Zero-fuel weight: 13,500 lbs.
Maximum landing weight: 15,300 lbs.
Wing loading: 71.1 lbs/sq.ft.
Power loading: 2.6 lbs/lb.
Maximum usable fuel: 7440 lbs.
Best rate of climb: 4339 fpm
Certificated ceiling: 45,000 ft / 13715 m
Max pressurisation differential: 9.4 psi.
8000 ft cabin alt @: 45,000 ft.
Maximum single-engine rate of climb: 1276 fpm @ 200 kts.
Single-engine climb gradient: 387 ft/nm.
Single-engine ceiling: 23,500 ft.
Maximum speed: 471 kts.
Normal cruise @ 41,000ft: 459 kts.
Fuel flow @ normal cruise: 889 pph.
Stalling speed gear/flaps down: 99 kts.
Balanced field length 4,784 ft