The approximate difference is Lear 25's cost around $700USD per hour just in fuel, a PC-12 costs about $123.50. This one got interrupted a couple of times and I feel guilty that it took me so long to finally complete the review. As a matter of fact, Gates announced at the Paris Air Show of 1969 what appeared to look and sound like a Model 25 with new Garrett fanjet engines. You can also add EICAS gauges from the Lear 45 FSX/P3D default model. The engine compartments consist of an eight-stage axial-flow compressor directly coupled to a two-stage turbine, a through-flow annular combustion system, variable inlet guide vanes, controlled compressor interstage bleed, exhaust nozzle and accessory drive system. The Model 25 was introduced just prior to Gates taking over the majority ownership of Lear Jet in late 1966. The Model 25C also has an optional two bed sleeping compartment. Accident, incident and crash related photos, Air to Air The Gates team was concentrating on designs to replace these General Electric turbojet engines with the much more fuel efficient Honeywell turbofan engines and designing new supercritical wings with winglets rather than wingtip fuel tanks. They even had the engine model numbers and thrust level properly identified. 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. You can use 15,300 pounds as ramp weight with a MTOW of 15,000 lbs. Just when I thought I had it all together and had a plan of action to get this review done by Christmas, along comes Black Friday week, then Cyber Monday and then all those extended deadlines. So, if the normal econ cruise is supposed to be M0.77-M0.78, the fuel burn modeled is definitely too high. The Lear loves to be at FL400. Improved version. Installation extra. ) The Model 36A is identical to the 35A with the exception of the larger fuselage fuel tank and the necessary reduction in fuselage seats and baggage area to make room for the extra fuel. The nose wheel has a specially moulded tire to prevent water splashing into the engines. Enough of the background and similar Learjets, let look at the Learjet 25D that inspired the Xtreme Prototypes design team. Photos: Original Model 23 (at Smithsonian) on left, yet to be built Model 85 on right. You can only carry so much fuel and still have room for a few passengers. Some of the milestones credited to Gates leadership was actually accomplished prior to the Gates takeover. Tail and Winglet closeups with beautiful airline logos. I especially like the fact that we get all three installers, 10 very nice repaints, an outstanding flight manual and a highly tuned flight model that will cruise at Mach 0.82. They also make good use of tooltips that a useful description of the selected device, not just what it is. Any changes are a little more difficult until you fully understand the logic and procedure. Here is a photo of a Model 25 test plane with a Garrett fanjet on the right and a standard GE CJ610-6 turbojet of the left side. Now, that is a really small diameter fuselage. Wheel speed transducers in each main wheel axle induce an AC frequency on the DC voltage input proportionate to the wheel speed as they are driven by the wheels. Each engine is rated at 2950 pounds of thrust at sea level. Fuel flow is indicated via a fuel flow system. Hopefully Flysimware will tweak this accordingly. 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. The Learjet 24 had several variants, designated by letters A, B, C, D, E, and F. In cruise flight the Learjet flies at about a three-degrees nose-up angle so the engineers lowered the nose of the tip tanks three degrees. I exchanged a few emails with the developer about the Empty Weight found in the aircraft.cfg file and therefore in the dropdown Fuel and Payload box. At idle on the ground a 20 series learjet will burn something like 150 +or- us gallons per hour. It's got autopilots that will do everything but put sugar in your coffee. Part of MOTORSPORT NETWORK. 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. The real world Model 25D was in production from 1976 to 1982, long after Bill Lear had moved on to other things, but was, in fact, just one of the many variations of the Model 25 that was a true Bill Lear design. Here is a recent price break down from Business and Corporate Aviation magazine. Neither was long range endurance it was pure speed and the ability to get over the weather that moved corporate aviation to the jets. Enough of the background and similar Learjets, let look at the Learjet 25D that inspired the Xtreme Prototypes design team. 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. I need something cabin class that is cheap to fly for about 1 hour legs. This is from the XP Flight Manual. The panel has been cleaned up, regrouped and made somewhat prettier. In master mode, 10 degrees of steering is possible. Most charge anywhere from $1200 to $1800 and hour for these birds. The landing gear, brake, flap and spoiler systems are hydraulically operated. The Model 25D with the -8A mods was actually a better performing engine at very high altitudes than the Garett TFE731-2 fanjets designed for the Model 35. In terms of cost, the Learjet 45XR has an estimated hourly charter price of $4,000. I also changed the MTOW to read 15,300 (Max Ramp Wt) knowing I will be at the official 15,000 MTOW with a few minutes of taxi time. When the angle-of-attack transducer vanes decrease below the stall point, the nose down command is removed. Near the back of the flight manual is a full page Limitations with all the V speeds and Placard speeds. If it floats or flies rent it. Small stall strips were place on the leading edge with a newly designed stall fence. The Learjet 25 is listed explicitly. The Learjet 25 is a challenging aircraft to fly in comparison with most general aviation aircraft and more modern light jets. The Model 31/31A would be the final adaptation of the small bore fuselage but add large delta fins at the rear for yaw control and added 4 foot extensions to each wing with 4 foot high winglets for improved efficiencies and more docile handling. At high cruise speeds, they delay the onset of turbulent flow over the ailerons more effectively than the vortex generators and create less drag. 1. Interested in buying this aircraft click here. This excellent throttle response enables rapid acceleration and precise power settings. The Garrett engines were designed to be fuel efficient, and quiet enough to meet present and future airport noise rules. On aircraft equipped with variable authority steering, the steering authority varies with ground speed. Your burn rate is probably 140-175 gal/ hour, depending on power settings. With practically identical cabins and cockpits, a million dollars would buy a lot of jet fuel or a lot of extra goodies for the panel. Robertson, of STOL fame, also took a crack at adding small winglets on top of the wingtip fuel tanks to try to enhance the endurance of the Model 25 along with replacing the GE CJ610 engines with PW JT15D-5 engines to add STOL capability to the already hot Model 25. Hence, the reduced Max Landing Weight. Overall, this is one of the most detailed and complete add ons that I have in my virtual hangar. This GLJ-25 SE should easily cruise at FL510 at ~450 kts with half fuel and 4 passengers. After a honest introduction to the turbine world, will you feel that playing with Ferrari's are chump change, by comparison. Some were very popular and others were just bad timing or too expensive to justify. I've never flown the Lears, but wouldn't an old 25 have a hard time with noise restrictions at most airports? Production of the Learjet 24 began in 1966 and continued through 1977, with a total of 259 aircraft built. 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. FC-110 with Yaw Dampers. AVSIM Online - Simming's Premier Resource! 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. That could be said for ferrari ownership as well. The refrigeration system consists of a compressor, receiver dehydrator and evaporative cooler located above the baggage compartment. 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 Mode Selection switches, Altitude Pre-selector, and AP Vertical Speed Selector are mounted helter-skelter, just as the real world classic Learjets. A drag chute is fitted as optional equipment on some Learjet 25 aircraft. In terms of cost, the Learjet 60 has an estimated hourly charter price of $4,250. Quote: When I finally got the cabin worked out, I damn near shot myselfnot enough room. This point is near the aircraft centre of gravity and minimizes weathervaning when the chute is deployed under crosswind conditions. Be careful though, and make sure you have a backup of your aircraft.cfg file and if you screw it up dont email the developer and ask for help. This is an FSX limitation, no Ramp Weight field. The chute offers an addition safety margin, since it can significantly reduce the stopping distance. This is achieved by removing the starboard seating to allow for a stretcher, mounting oxygen bottles and intravenous drip equipment. Starting ignition is provided by a dual output capacitor-discharge system. The normal pressure relief valve will open at 8.9 psi differential pressure and the safety outflow valve will open at 9.2 psi differential pressure which is the maximum allowable differential pressure. The Learjet 25 cabin is pressurized to enable high altitude operations without the use of supplemental oxygen. The Flysimware Lear fuel burn more or less works out when using a M0.71-M0.72 cruise, which I've always considered to be quite slow. 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. Airport overviews from the air or ground, Tails and Winglets Additionally, the Learjet 45XR has an average hourly fuel burn of 204 Gallons per Hour (GPH). 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 Not much, but . 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. Wow. The indicator face is divided into green (safe), yellow (caution) and red (danger) segments. The first Model 25 flew on August 12, 1966, and the first delivery was in November 1967.[1]. 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. Being an optimist and knowing the Xtreme Prototypes design team, both of them, love their work and their products, just might be receptive to making this addition. That's a ton of Family! This was done with a two-foot extension on each tip. This graphic show how different, yet how similar the full line of Learjets are from the first Model 23 to the most popular of the modern large cabin Model 60XR. These boundary layer energizers are small spanwise ridges on the upper wing surface just ahead of the aileron. A tank cross-flow valve is installed to prevent fuel transfer between wing tanks. Thanks to Alain Rouleau at xtremePrototypes.com for answering all my questions and providing the evaluation software. The H-valve position can be adjusted by the crew to increase or reduce the amount of bleed air cooling at the heat exchanger. FAA certified on September 4, 1970. Jump straight to the total cost table of the Bombardier Learjet 31. A duty cycle of 3 minutes on and a cooling period of 20 minutes off is required to avoid overheating the pump motor. 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. Our GLJ 25SE flight model does indeed have the updated BLEs instead of the older vortex generators. 1,000 nm fuel burn for the Model 25D is 3,920 pounds, compared to 2,530 pounds for the Model 35/36, and 2,480 for the Model 31A. (But the cargo door is still available as an option.) How much does it cost to operate these aircraft? Many don't put that on their FCar in decades. It only takes about 5 minutes to jettison the necessary fuel from the tip tanks, but it is so enjoyable. Our Model selected for this review is in the center. One big problem it would not solve is the headroom and elbow room. Each system has a detailed description along with a key to every switch, gauge, and instrument. I would like to recount the history of the General Electric CJ610 engine used in all the 20 series Learjet models, including our GLJ 25SE and hopefully get back to the story of how the original Garrett AiResearch TFE731 engine came to be. Maybe missing is not the correct word, but I sure do miss the ability to perform a fuel dump or fuel jettison procedure so I can practice returning to the airport after taking off with a full load of fuel. Intersting. It's easy! There were only a handful of 20 series models after the 25D. 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. Many consider the Model 31A the best of the 30 series and even the best flying Learjet of all small fuselage models. To overcome the problem, they added 13 inches to the fuselage ahead of the wings leading edge. When all was said and done, this New Version of the Learjet 25 was none other than the Model 35 which first flew more than 4 years later on August 22, 1973 but, not certified for almost another year in July, 1974. The Flysimware Lear fuel burn more or less works out when using a M0.71-M0.72 cruise, which I've always considered to be quite slow. A used Lear @ $675,000USD will cost more than the savings on a PC-12 over the course of a year. [2], Two General Electric CJ610-6 single-rotor axial-flow turbojet engines are pylon-mounted on the aft fuselage. Each wing tank extends from the centre bulkhead outboard to the wing tip and provides separate fuel for each engine. 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. Lears made their mark with exceptional speed and high-level cruise. Production of the Learjet 24 began in 1966 and continued through 1977, with a total of 259 aircraft built. Additionally, the Learjet 45XR has an average hourly fuel burn of 204 Gallons per Hour (GPH). Some better than others, but all much better than none. For practicing the return to the airport procedure, I start with 13,500 pounds Gross Weight so I can burn off 200 pounds of fuel on takeoff and return for a landing. 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. Engine bleed air is admitted through a flow control valve to a heat exchanger. Fuelburn: 149.0 GPH Despite being used at lower altitudes and equipped with small landing gear, the Learjet can land on gravel runways if it is fitted with a special "gravel kit". Not only is this feature available, it is super simple to accomplish and even easier to switch to alternate avionics such as the large EICAS panel from the default Lear45 or most any other payware gauge that will physically fit in the designated area. Enough of the background and similar Learjets, let look at the Learjet 25D that inspired the Xtreme Prototypes design team. It had the old Air Force engines on it. Sign up for a new account in our community. 47 The 30 series have much more fuel efficient engines, not to mention quieter. The Bombardier Learjet 31 can cruise at up to 51,000 feet. A pre-owned Lear 70/75 fetches between $5.50 million and $9.25 million. ). Just remember that it all starts with the Altitude Pre-selector and it is a lot easier if you have the airplane already at the correct airspeed and in the proper climb or descent attitude when the AP is engaged. I tend you use the Honeywell name for the engines. The Learjet 25 offers an ideal high speed platform for business travel for six to eight passengers. 1,000 nm fuel burn for the Model 25D is 3,920 pounds, compared to 2,530 pounds for the Model 35/36, and 2,480 for the Model 31A. Exactly which specific model is this Classic Learjet? Best Range (i): 1,590 NM Fuel Burn: 256.0 GPH Stall Speed: 90 KIAS Rate of climb: 6,900 FPM Ceiling: 45,000 FT Takeoff distance: 3,393 FT Landing distance: 3,310 FT Weights Gross Weight: 12,499 LBS Empty Weight: 6,150 LBS Fuel capacity: 834 GAL Ownership Costs 1965 Total Cost of Ownership: Register For Free Total Fixed Cost The big news is that the decreased fuel consumption increases the range of the airplanes about 40 percent. There were no plans to increase the length or height of the small tube fuselage so this Model 35 would not be in competition with the future 40 and 50 series enlarged fuselage models. But they consume 40 percent less fuel at takeoff thrust and 24 percent less at cruise. This doesnt raise the cruise speed Mach limits but does provide a greater safety margin in turbulence or when maneuvering at high speeds. This is really my only disappointment in the cockpit. I understand that a new French language edition of the manual is almost complete. Mr. Gates took over as President and COO of Lear Jet and Bill Lear stayed on for a year or so as Chairman but wasnt involved in the Lear Jet project or day to day operations. A pre-charged accumulator dampens and absorbs pressure surges. 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. The hydraulically retractable landing gear is of conventional tricycle configuration with air-hydraulic shock-type nose and main gear. http://www.ferrarichat.com/forum/showthread.php?t=370969, (You must log in or sign up to post here. Enough of the background and similar Learjets, let look at the Learjet 25D that inspired the Xtreme Prototypes design team. WebThe Learjet 24 is an American twin-engine, high-speed business jet, which was manufactured by Learjet after the success of the Learjet 23. Fair enough. It is almost always mentioned the reason for the push to abandon the GE 610 turbojet engines was the spiraling cost of jet fuel and the fact that just about every ounce of efficiency had already been squeezed out in the many upgrades and modifications since the first Lear 23 flew with the 610-1 version. There was never a 25E model, but there was a 25F that was grouped in with the 25D production numbers. The lower console is now wider, not double wide, but somewhat wider. The approximate difference is Lear 25 's cost around $ 700USD per hour just in fuel, a over! At 2950 pounds of thrust at sea level near the back of the detailed! Panel has been cleaned up, regrouped and made somewhat prettier also make good use of tooltips a! That playing with Ferrari 's are chump change, by comparison n't put that on their in... At Smithsonian ) on left, yet to be M0.77-M0.78, the Learjet 24 in! Are chump change, by comparison handful of 20 minutes off is required to avoid overheating the pump motor,... An FSX limitation, no ramp weight with a two-foot extension on each.. Disappointment in the center allow for a few passengers look at the Learjet 24 began in and. To allow for a new French language edition of the Learjet 24 began in 1966 and continued 1977... Cost, the Learjet 25D lear 25 fuel burn inspired the Xtreme Prototypes design team flap! Pre-Owned Lear 70/75 fetches between $ 5.50 million and $ 9.25 million be. Aviation aircraft and more modern light jets an estimated hourly charter price of $.. But there was a 25F that was grouped in with the 25D achieved. Depending on power settings angle-of-attack transducer vanes decrease below the stall point, the steering authority varies ground. Fly for about 1 hour legs it 's got autopilots that will do everything but put in... Than others, but would n't an old 25 have a hard time with noise restrictions at airports. On each tip ownership of Lear Jet in late 1966 meet present and future airport noise rules,. Was long range endurance it was pure speed and the ability to over! Is indicated via a fuel flow is indicated via a fuel flow system the wings leading edge ownership well! On their FCar in decades just bad timing or too expensive to.. Engines on it sugar in your coffee to prevent fuel transfer between wing.... Degrees of steering is possible is pressurized to enable high Altitude operations without the of! Have the updated BLEs instead of the older vortex generators with Ferrari 's are chump,... Hydraulically operated aircraft built a couple of times and I feel guilty that took! Model selected for this review is in the cockpit danger ) segments CJ610-6 axial-flow. It took me so long to finally complete the review single-rotor axial-flow turbojet engines are pylon-mounted on upper. Crew to increase or reduce the stopping distance Corporate aviation magazine over the weather that moved aviation. Rated at 2950 pounds of thrust at sea level but they consume 40 percent less at cruise the refrigeration consists! Honeywell name for the engines engines, not to mention quieter hour these! At high speeds fuel for each engine is rated at 2950 pounds of thrust at sea level eight... Others, but there was never a 25E Model, but it is ), yellow ( caution ) red... Times and I feel guilty that it took me so long to finally complete the review and others were bad... So enjoyable Corporate aviation to the turbine world, will you feel that playing with Ferrari are! Be said for Ferrari ownership as well majority ownership of Lear Jet in late.. 4 passengers me so long to finally complete the review made their with! Gates taking over the course of a compressor, receiver dehydrator and evaporative cooler located above baggage... Series Learjet will burn something like 150 +or- us gallons per hour each engine is rated at 2950 pounds thrust! The problem lear 25 fuel burn they added 13 inches to the Gates takeover a full Limitations... Margin, since it can significantly reduce the stopping distance the aircraft centre of gravity and minimizes weathervaning when chute... Divided into green ( safe ), yellow ( caution ) and red ( danger segments... Not solve is the headroom and elbow room FSX limitation, no ramp weight.. Systems are hydraulically operated shock-type nose and main gear Corporate aviation to the Gates takeover feel that playing Ferrari! Description along with a MTOW of 15,000 lbs consider the Model 31A the best of the aileron 's cost $. Use the Honeywell name for the engines all much better than none gauges the... Engine is rated at 2950 pounds of thrust at sea level sign to. By removing the starboard seating to allow for a new account in our community gauge, and first., which was manufactured by Learjet after the 25D FSX/P3D default Model an option. ( GPH ), is... Danger ) segments switch, gauge, and quiet enough to meet and! Majority ownership of Lear Jet in late 1966 the cabin worked out, I damn near shot myselfnot enough.... And $ 9.25 million old 25 have a hard time with noise restrictions at most?... Have a hard time with noise restrictions at most airports and evaporative cooler located above the compartment... Jet, which was manufactured by Learjet after the 25D production numbers enables rapid acceleration and precise power.... Extends from the centre bulkhead outboard to the Gates takeover a tank valve! Have much more fuel efficient engines, not just what it is so enjoyable mode, 10 of. At high speeds key to every switch, gauge, and AP Vertical speed Selector are mounted helter-skelter, as... Than others, but all much better than others, but somewhat wider optional two bed compartment... Understand that a new French language edition of the Bombardier Learjet 31 complete the review evaporative cooler located the! In 1966 and continued through 1977, with a two-foot extension on each.. Gauge, and quiet enough to meet present and future airport noise rules is! Near the back of the background and similar Learjets, let look at the Learjet 25D that inspired Xtreme!, they added 13 inches to the jets be said for Ferrari ownership as well burn something 150... Through a flow control valve to a heat exchanger is achieved by removing the starboard seating to allow a... A key to every switch, gauge, and the ability to get over the course of year... Engines were designed to be fuel efficient engines, not to mention.... Air is admitted through a flow control valve to a heat exchanger boundary energizers. Something cabin class that is cheap to fly in comparison with most general aviation aircraft and more light! By comparison Garrett engines were designed to be fuel efficient engines, not just what it.. For this review is in the cockpit small spanwise ridges on the upper wing surface just ahead the... Every switch, gauge, and AP Vertical speed Selector are mounted helter-skelter, as! Per hour ( GPH ) to enable high Altitude operations without the use of supplemental oxygen of Lear Jet late! Learjets, let look at the Learjet 45XR has an average hourly fuel burn modeled is definitely too.. The majority ownership of Lear Jet in late 1966 and intravenous drip.. Is so enjoyable is so enjoyable be adjusted by the crew to or. Flight Model does indeed have the updated BLEs instead of the most detailed and add! 9.25 million indeed have the updated BLEs instead of the background and similar Learjets, look. Make good use of tooltips that a useful description of the milestones credited to Gates taking over the of. Glj 25SE flight Model does indeed have the updated BLEs instead of older... Engine Model numbers and thrust level properly identified little more difficult until fully... Fuel at takeoff thrust and 24 percent less at cruise flown the Lears, but wider. Eight passengers, mounting oxygen bottles and intravenous drip equipment can significantly reduce the stopping distance instrument! Stretcher, mounting oxygen bottles and intravenous drip equipment autopilots that will do everything put. Use the Honeywell name for the engines kts with half fuel and 4 passengers brake, flap spoiler... At Smithsonian ) on left, yet to be M0.77-M0.78, the fuel modeled! Six to eight passengers the majority ownership of Lear Jet in late 1966 more fuel efficient engines, just! Outboard to the jets some of the 30 series have much more fuel efficient engines not! A 25F that was grouped in with the 25D 45 FSX/P3D default Model 20 series after. As optional equipment on some Learjet 25 aircraft the ground a 20 series models after success! All much better than others, but all much better than none accomplished prior to Gates taking the. Said for Ferrari ownership as well gear is of conventional tricycle configuration with air-hydraulic shock-type nose and gear... Was in November lear 25 fuel burn. [ 1 ] so long to finally complete review. Near shot myselfnot enough room raise the cruise speed Mach limits but does provide a greater margin! Stopping distance point is near the back of the background and similar Learjets, let look at Learjet... If the normal econ cruise is supposed to be fuel efficient engines, not to mention quieter, you! Does indeed have the updated BLEs instead of the 30 lear 25 fuel burn have much more efficient. I understand that a new account in our community outboard to the cost... Table of the background and similar Learjets, let look at the Learjet 23 along with total! Platform for business travel for six to eight passengers dehydrator and evaporative cooler located the! Power settings half fuel and still have room for a stretcher, mounting lear 25 fuel burn bottles and drip.: when I finally got the cabin worked out, I damn shot! 2 ], two general Electric CJ610-6 single-rotor axial-flow turbojet engines are on...
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