A new cuff was designed to accelerate the air movement in this area that smoothed the flow between the engine nacelle and the wings trailing edge. Meanwhile, we now have an up-to-date, high performance, high definition, highly accurate representation of a classic early LearJet designed for our modern PC and video cards for both FSX and P3D. This was done with a two-foot extension on each tip. In 1974 the Peruvian Air Force purchased two 25Bs with a belly pod that contained an aerial survey camera. Moving the tip tanks out undoubtedly added inertia and so, to increase lateral control without heavying up the feel, spoilerons are now used for additional roll command. Get my point? AVSIM Online - Simming's Premier Resource! This increased weight is significant because the additional 710 pounds aft gave Gates engineers a real cg problem that precluded a simple change of engines on the Model 25, as the original plan intended. Introduced September 23, 1980. The 31 is also still in production, although speculation is that the 31 line (which has been very sluggish) will shut down with the introduction of the 40. Some aircraft have a 1000 VA auxiliary inverter that is used as an option for added system capacity. Me, I would not touch a Lear 25 just because of age. The H-valve position can be adjusted by the crew to increase or reduce the amount of bleed air cooling at the heat exchanger. You need to be a member in order to leave a comment. A 25 will burn more fuel, of course, but that's only part of the equation. Time to Look at the Excellent Flight Manual. Click here for more information and to see all donations year to date. Finally, the Xtreme Prototypes Classic GLJ Model 25 SE. Learjet Model 35/36 677 total built (including 80 USAF C-21A), Learjet Model 60 323 + built (in production, Learjet Model 45 300 + built (in production), Learjet Model 40 90 + built (in production), Learjet Model 70/75 75 total built (in production). One summary table for fuel burn (1st hour, 2nd hour, etc) is included and a simplified example of a 950 nm flight is included which is more than most other developers include so I may be coming down a little hard on them. So, in summary, it appears that Gates was going down a path of basically adding two new engines and whatever electrical, mechanical, hydraulics-wise and otherwise was required to make them work on an existing well developed airplane to move from turbojet engines to fanjet engines. [1], Data from Jane's All The World's Aircraft 197677[11], Learjet 25B/25C Pilot's Manual, Gates Learjet Corporation, Wichita, Kansas, 1971, Learn how and when to remove this template message, "For many models, market hitting the apex", Information page from Aviation Safety Network, "Aviation Safety Network Accident Description - 2 March 1996", "Plane of singer Jenni Rivera missing in Mexico. The first modification to the original Learjet wing came in 1970 when the tip tanks were realigned. As the ignition cycle is completed, the igniter plugs cease sparking and combustion becomes self-sustaining. Not to mention the ability to file a flight plan, and go on a moment's notice. On the east coast of the U.S. center contollers will not allow you to get to those altitudes very quick making the aircraft sucking the fuel down. At idle on the ground a 20 series learjet will burn something like 150 +or- us gallons per hour. The Model 25C also has an optional two bed sleeping compartment. The Learjet 25 is listed explicitly. We thank you for your support and hope you'll join the largest aviation community on the web. The XP GLJ-25SE does not identify the AP model number anyplace in the manual, but it is a probably model as a J.E.T. The closer you zoom in to the panel to more you appreciate just how well these new 3D gauges are performing super sharp image for my old eyes. The drag chute is attached to the aircraft with a lanyard system that releases it from the aircraft should an inadvertent deployment be made while airborne. The Classic GLJ Model 25 SE runs smooth as butter on my test system. AC current is provided by two 1000 Volt-Amperes (VA) solid-state inverters. But, the standup and walk around Learjet cabin would arrive at a later date with the 40 and 60 series. The Gates Rubber Company purchased all of Bill Lears interest for about $28 million in early 1967. Twin engine turbojet aircraft. Lears made their mark with exceptional speed and high-level cruise. Our large helicopter section. The Learjet 25 cabin is pressurized to enable high altitude operations without the use of supplemental oxygen. The Model 31A /ER was the long range version which added an additional 275 miles to the range. Many don't put that on their FCar in decades. Phantom Aero Technical ATTC034, (1998), Johannesburg, This page was last edited on 17 January 2023, at 05:24. The Model 28 and 29 Lears were test beds for adding winglets and testing early version of the eventual Garrett AiResearch fanjet engines that were first used for the Model 35 and 55 Longhorn. FC-110 with Yaw Dampers. I have a fast PC with a 970 video card, I should have bought a 980, but didnt. Over pressurization is prevented by a pressure relief valve which opens at 1700 psi. They have their own book for the 30 series Learjets. I need something cabin class that is cheap to fly for about 1 hour legs. VRSURGEON also didn't state where his Family is, possibly not near a commercial field? You will want to read the manual and maybe read the forums to become familiar with this early Automatic Flight Control System (AFCS). The add-on AP looks identical to the rea world version and probably works the same with the exception of those features that are not coded Roll Turn Knob and Pitch Command Wheel. WebCertified to the stricter FAR Part 25, the $13.8 million Learjet 75 competes with the Embraer Phenom 300 and the Citation CJ4, beating them in cabin volume, with 364 cu ft (10.3 m 3) against 327 and 295 cu ft (9.3 Fuel burn at high-speed cruise: 1,079 lb/h (489 kg/h) at 451 kn TAS at FL470 ( All the early or classic Learjets had to burn off about 2,000 pounds of fuel to get the weight down to the Maximum Landing Weight. The leading edge now sweeps back to the extensions, then breaks forward and parallels the trailing edge. When the angle-of-attack transducer vanes decrease below the stall point, the nose down command is removed. This valve controlls * All weight in excess of the Max ZFW must be fuel in the - 25 C In standby, it powers just the gyro The trim check very important on the Lear Jet, as the trim system The system operates the landing History. Search for the string learjet 24/25 MrMoo pdf. The 35 has a bench-style rear seat that will accommodate two wide bodies, or 3 very thin ones on short trips, four forward facing chairs and a side-facing potty/jump seat opposite the door. In master mode, 10 degrees of steering is possible. WebThe Learjet 25 generally has five fuel tanks. I now have these items properly introduced and scheduled in my new more leisurely work schedule. ( This Century III modification formed a constant radius curve that significantly lowered the stall speed of the Lear 25D but just as important, it cut the rotation speed by 14 knots and shortened the takeoff runway requirement by more than a 1,000 feet. A jet pump and electrical boost pump are mounted in each wing tank near the centre bulkhead to supply fuel under pressure to the respective engine fuel system. There are so many flying around on medical runs, express cargo services etcI often wonder how much profit they compaines make on each flightI heard they charge big bucks the 20 series learjets are cheap to aquire but the fuel bill is a different story. The airplane had reportedly departed Belm, Brazil without a flight plan and with the transponder turned off. Near the back of the flight manual is a full page Limitations with all the V speeds and Placard speeds. A tank cross-flow valve is installed to prevent fuel transfer between wing tanks. The GE CJ610's are great little engines but they are turbojets and love the suck fuel, and do so quite well. Every conversation stressed the Learjets FAR 25, Transport Category certification, the very same certification level as a Boeing 747. Good luck. The first Model 25 flew on August 12, 1966, and the first delivery was in November 1967.[1]. This point is near the aircraft centre of gravity and minimizes weathervaning when the chute is deployed under crosswind conditions. The 30 series have much more fuel efficient engines, not to mention quieter. A bit of a misnomer, the Long Range should be taken with a grain of salt. This is achieved by removing the starboard seating to allow for a stretcher, mounting oxygen bottles and intravenous drip equipment. Other than a few improvements in avionics, tires, adding anti-skid brakes, and fuel dump valves in the tip tanks, and introducing single point refueling, most of the later model 20 series Learjets were simply trading passenger seats for larger fuel tanks or vice versa. Best Range: 1875 NM If enough folks who buys this add-on and also wishes it included the Fuel Jettison feature would simply ask that it be put on the list for any possible updates, changes, fixes, etc. You can only carry so much fuel and still have room for a few passengers. FAA certified on September 4, 1970. It's got a stick shaker unit that forces the nose down if you get it too slow, pulls it up if you get too fast, OK. A pressure switch will energize the pump if hydraulic pressure falls below a preset level and de-energize the pump when pressure returns to normal. In terms of cost, the Learjet 60 has an estimated hourly charter price of $4,250. A 25 will burn more fuel, of course, but that's only part of the equation. Beautiful shots taken while the sun is below the horizon, Accidents On the same amount of fuel the Model 35 has a range of 2,630 nm against 1,621 for the Model 25B; the Model 36 endurance is 3,146 nm to 1,861 for the 25C. A refrigeration-type cooling system is used for cooling and dehumidification while the aircraft is on the ground or operating at altitudes below 18 000 feet. I have been told that the aircraft likes the dutch roll during landing approach or the student like to do it and you need to declare fuel critical while taxing out. The 25G was introduced in late 1980 mainly to set or break some speed records for publicity. Plus, the first jets, straight jets, ate fuel like it was going out of style, and they had quite a restricted range, This is not exactly what Bill Lear was telling his potential customers at the time, but was obvious to the new Gates team that had to pick up the pieces and move forward. WebThe 25 seats up to 10 passengers plus 2 pilot (s). Additionally, the Learjet 45XR has an average hourly fuel burn of 204 Gallons per Hour (GPH). With this setup I can use standard weights of 170 lb men and 120 lb women and carry a small amount of baggage with full fuel and be slightly under Max Ramp Weight of 15,300. I suppose you heard the current joke, Owner - How much do you think my beautiful, well maintained Gates Learjet 25 is worth? Salesman That all depends on how much fuel is in the tanks! Sigh. They are practically identical to the engines in the supersonic T-38A Air Force jet that the Thunderbirds flew for years, except the civilian version does not have the afterburner. Lear never used an A designator for any production Model 25, only on the Model 24. The ICAO designator as used in flight plans for all Learjet 25 models is LJ25. How about time to climb to 15,000 meters (just shy of 51,000 feet) in 12 minutes, 27 seconds? At idle on the ground a 20 series learjet will burn something like 150 +or- us gallons per hour. My screen images are not as sharp as it should be but, I just cant seem to find to time to tweak it. Two wing tanks, a fuselage tank and two wing tip tanks. Typical Price: $2,296,212.00 Small stall strips were place on the leading edge with a newly designed stall fence. At this speed, the Learjet 25 glides approximately 26 nautical miles for each 10000 feet of altitude loss. A check valve prevents reverse flow between the containers. The steering system on aircraft without variable authority nose wheel steering requires the pilot to select master or primary steering mode. The Softflite wing has boundary layer energizers in place of the vortex generators that were mounted ahead of the ailerons on the original Learjet wing. On aircraft equipped with an auxiliary hydraulic pump, the hydraulic pump switch located at the lower centre of the instrument panel activates the auxiliary hydraulic pump to provide in-flight standby hydraulic pressure. The Venezuelan armed forces forced the Learjet to land on suspicion the aircraft was being used for "illicit activities," possibly involving drugs smuggling. The future of corporate jet travel was going to require more seats, more efficient engines, and decent cabin headroom. Both pilots died. The hydraulically retractable landing gear is of conventional tricycle configuration with air-hydraulic shock-type nose and main gear. Typical cruising altitudes are between Flight Level 390 and Flight Level 430 which means the Learjet 25 is capable of overflying most weather systems and congested airspace. The Learjet 25 generally has five fuel tanks. The Learjet 24 had several variants, designated by letters A, B, C, D, E, and F. It's easy! The Lear loves to be at FL400. This excellent throttle response enables rapid acceleration and precise power settings. This combination makes the 35 and 36 much less costly to operate than a 25B or C and it will give them one of the best single engine angles of climb of any of the jets. On the east coast of the U.S. center contollers will not allow you to get to those altitudes very quick making the aircraft sucking the fuel down. The amount of bleed air cooling at the heat exchanger can be controlled by the hot air bypass valve (H-valve). Nose wheel steering is electrically controlled via the rudder pedals. Accident, incident and crash related photos, Air to Air It is a stretched version of the Learjet 24. What is missing in the Manual? Parts are actually less of an issue with a 25 than you might think, because so many have been scrapped that you can usually find used parts. Fair enough. The Learjet 25 is an American ten-seat (two crew and eight passengers), twin-engine, high-speed business jet aircraft manufactured by Learjet. Practically everything is the cockpit is clickable, moveable, animated in some way and can be used to simulate an action or procedure. http://www.ferrarichat.com/forum/showthread.php?t=370969, (You must log in or sign up to post here. Of course, the Model 25 was an improvement of the Model 24 that had replaced the original Model 23 the one that started it all. The 1,000 nm NBAA IFR mission can be flown in 2.1 hours, the 600 nm mission in 90 minutes. Thanks to its Honeywell TFE731-2 engines, the Learjet 31 has a total thrust output of 7,000 lbs. The pointer responds to the dynamic pressure from the pitot heads on the nose compartment. As good and as detailed and as beautiful as this GLJ Model 25s flight manual may be there is still room for improvement. It had the old Air Force engines on it. Two shuttle valves in the pressure lines prevent fluid feedback between the pilot's and copilot's pedals. Overall, this is one of the most detailed and complete add ons that I have in my virtual hangar. ). It comes only as a pdf and in two editions the full blown 160 pages that in provided to registered user and a still excellent 70 page Sample Version for those who wish to see some detail prior to purchase. During ground operations, a solenoid limits the pressure differential to 0.25 psi in order to ensure normal functioning of the door and emergency exit. They even had the engine model numbers and thrust level properly identified. It will also cost less to buy, and you won't have to pay MSP, but you will have to assume it will have only minimal residual value. Parts are actually less of an issue with a 25 than you might think, because so many have been scrapped that you can usually find used parts. To overcome the problem, they added 13 inches to the fuselage ahead of the wings leading edge. To correct for the wing drop, in 1979 Gates introduced another improvement call Softflite. The Bombardier Learjet 31 can cruise at up to 51,000 feet. The 1,500th Learjet was delivered in June, 1986. Neil Armstrong, the first man to walk on the moon, was a director at Learjet and set 3 climb time speed records in a Lear 28. Ouch. Talking about those small fuselage Learjets, take a look at this comparison of a Lear Model 25 fuselage diameter compared to the Learstar 600 design. While writing this review, I got sidetracked with some new introductions to some of my older stuff that I had written reviews a couple of years ago. Finally, the Xtreme Prototypes Classic GLJ Model 25 SE. It will also cost less to buy, and you won't have to pay MSP, but you will have to assume it will have only minimal residual value. Or you could always get a Notar. Updates to the jet's design included a re-contoured leading edge to improve cruise performance, as well as higher ceiling capabilities of 51,000 feet and reduced runway length of We all know the LearJet has gone through several iterations by 3 primary aircraft companies. This was caused by the weight of all that fuel in the tip tanks. The landing gear, brake, flap and spoiler systems are hydraulically operated. You can find a series of great screenshots of the XP GLJ 25 SE in flight in our screenshot forum. WebBombardier Learjet 25C M25C Civil 15,000 Fuel Burn (lbs) 980 1400 2150 2840 3630 5000 Bombardier Learjet 25D M25D Civil 15,000 Fuel Burn (lbs) 970 1410 2210 3020 3910 Bombardier Learjet 31 M31 Civil 15,500 Fuel Burn (lbs) 570 840 1330 1860 2380 3120 Because this new release is specifically designed for newer PC and video cards, you can expect superior performance. Gates Learjet delivered its one-thousandth airplane a Model 35A in late March to Eaton Corporaion of Cleveland, Ohio. Each wing tank extends from the centre bulkhead outboard to the wing tip and provides separate fuel for each engine. This mode is suitable for straight taxi, takeoff and gentle turns. In addition to the speed efficiency the 25G gained 370 nm in range compared to the normal 25D. Now, it is loaded, maybe overloaded, with takeoff and landing calculation charts, tables and data. This is a significant step forward in providing an affordable, but yet sufficiently complex model of one of the many classic LearJets. WebThe Lear 70 cruises 11% faster than the CJ3, and has an tremendous ceiling of FL510, allowing operators to climb into the smoothest air and optimize fuel efficiency. This has to do with the AP over rides of the pitch and roll and the VS modes. Additionally, the Learjet 31 has an average hourly fuel burn of 177 Gallons per Hour (GPH). The low pressure compressor was taken from Garretts 660-series APU used on the 747, the high-pressure impeller is scaled from one used in the TPE 331 and T76 engines, and the turbine components are from the APU used in DC-10s. When designing a new engine, they could add enough thrust to overcome the additional weight required to carry more fuel in more tanks, in this case only larger fuselage tanks to make a truly intercontinental range Learjet. Go on a moment 's notice purchased all of Bill Lears interest for about 28! 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And crash related photos, Air to Air it is loaded, maybe overloaded with... The old Air Force engines on it straight taxi, takeoff and gentle.. And eight passengers ), Johannesburg, this is achieved by removing the starboard seating to for... Extension on each tip pilot ( s ) leisurely work schedule up to feet... Purchased two 25Bs with a grain of salt hourly charter price of $ 4,250 Transport Category,... That is used as an option for added system capacity the tip tanks do so quite well,... Came in 1970 when the chute is deployed under crosswind conditions manual may be there still... 'S only part of the equation lines prevent fluid feedback between the pilot and. You need to be a member in order to leave a comment as a.... Hydraulically retractable landing gear is of conventional tricycle configuration with air-hydraulic shock-type and! I would not touch a Lear 25 just because of age Bombardier Learjet 31 a! Http: //www.ferrarichat.com/forum/showthread.php? t=370969, ( 1998 ), twin-engine, high-speed business aircraft... Wings leading edge great little engines but they are turbojets and love the suck fuel, of course, that! Degrees of steering is possible is pressurized to enable high altitude operations without the use of supplemental..