Discussion in 'Aviation Chat' started by vrsurgeon, Aug 3, 2012. Primary steering mode allows up to 45 degrees angle of turn and is suitable for slow speed aggressive steering maneuvers. 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 Venezuelan armed forces forced the Learjet to land on suspicion the aircraft was being used for "illicit activities," possibly involving drugs smuggling. I was a dyed in the wool Cessna Citation fan for a long time and really still am, but you have to love the speed and power of these early Learjets. An angle-of-attack indicator translates signals from the stall warning system into visual indications of the aircraft angle-of-attack and allows the crew to monitor the proximity of stall caution zone. Our large helicopter section. 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. Hanger, insurance, service, unscheduled maintenance,de-icing, etc., you truly need to be prepared for the "real world" costs of ownership. For these faults, I apologize. 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. ) Now about that General Electric CJ610 turbojet engine. Additionally, the Learjet 31 has an average hourly fuel burn of 177 Gallons per Hour (GPH). Photo: Charlie Gates on left, Harry Combs on the right. Time to Look at the Excellent Flight Manual. So why are we talking about the Model 35/36 in a review of the Model 25D? The 1,000 nm NBAA IFR mission can be flown in 2.1 hours, the 600 nm mission in 90 minutes. This point is near the aircraft centre of gravity and minimizes weathervaning when the chute is deployed under crosswind conditions. The Bombardier Learjet 45XR can cruise at up to 51,000 feet. Remember, back at the time of production, the Model 25D was a full million dollars cheaper than a new Model 35. - Aircraft data that you believe is inaccurate or have specific experiences. Each wing tank extends from the centre bulkhead outboard to the wing tip and provides separate fuel for each engine. WebThe Learjet 24 is an American twin-engine, high-speed business jet, which was manufactured by Learjet after the success of the Learjet 23. Lear, Gates Lear, Bombardier Learjet, it's all the same thing at different points in time. Airliners.net is the leading community for discovering and sharing high-quality aviation photography. Here is a recent price break down from Business and Corporate Aviation magazine. The EICAS panel can be added from the default Lear45 with a couple of lines of code added to the panel.cfg file and then cycled with one click on a hot spot on the VC panel to the standard GPS or Flight1 GTN750, should you own one. At this speed, the Learjet 25 glides approximately 26 nautical miles for each 10000 feet of altitude loss. This was caused by the weight of all that fuel in the tip tanks. This Century III wing enhancement was introduced by Gates in 1976 for the new Model 35, but we also got the benefit because the Model 25D was a concurrent production airplane in the late 1970s. WebThe Learjet 25D is powered by General Electric CJ610-8A engines with 2,850 pounds of thrust. Some of this research was done for the Lionheart LR24B review and the follow-on comparison of the Learjet 24B to the T-38. 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. Pilot workload is high and approach, landing and takeoff speeds are above average for civilian aircraft. They put out 18.6 percent more thrust at sea level than the GE CJ610s used on the Model 25, and nine percent more thrust at 40,000 feet. 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. Hopefully Flysimware will tweak this accordingly. . Best Cruise: 417 KIAS 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. Hence, the reduced Max Landing Weight. Monobromotrifluoromethane (CF3BR) is used as extinguishing agent. The lower console is now wider, not double wide, but somewhat wider. FAA certified on September 4, 1970. I decided on an Empty Weight of 7,168 pounds and a total fuel capacity of 1,055 gallons. It took a year or more to realize they really needed an updated Model 35A and an extended range Model 36A. Lear never used an A designator for any production Model 25, only on the Model 24. True! Any changes are a little more difficult until you fully understand the logic and procedure. It's easy! In order to minimize heat build-up in the brakes and reduce brake wear, pilots are advised to deploy the spoilers upon touchdown. Thanks to its Honeywell TFE731-2 engines, the Learjet 31 has a total thrust output of 7,000 lbs. The indicator face is divided into green (safe), yellow (caution) and red (danger) segments. The original model 25 wing had a fairly sharp leading edge designed for high-speed cruise. (the Learjet 25D was certified for FL510). The pointer responds to the dynamic pressure from the pitot heads on the nose compartment. Practically everything is the cockpit is clickable, moveable, animated in some way and can be used to simulate an action or procedure. Oxygen is contained in a pressurized bottle located in the dorsal fin of the aircraft. hmm. I was at the Lear factory in Wichita about a month ago. Get my point? They also make good use of tooltips that a useful description of the selected device, not just what it is. My screen images are not as sharp as it should be but, I just cant seem to find to time to tweak it. A pre-owned Lear 70/75 fetches between $5.50 million and $9.25 million. Lears made their mark with exceptional speed and high-level cruise. Finally, the Xtreme Prototypes Classic GLJ Model 25 SE. Back in the real early days, fuel efficiency wasnt a big concern mainly because jet fuel only cost 18 20 cents a gallon. Many don't put that on their FCar in decades. Your burn rate is probably 140-175 gal/ hour, depending on power settings. The original tips were aligned with the longitudinal axis. Photo: A Gates Learjet showing enormous size of fanjet engines. Thanks to its Honeywell TFE731-2 engines, the Learjet 31 has a total thrust output of 7,000 lbs. The Lear 45 is a "fresh sheet" Lear that is already in production. How much does it cost to operate these aircraft? AC current is provided by two 1000 Volt-Amperes (VA) solid-state inverters. The XP design team did a good job with what they had to work with. A check valve prevents reverse flow between the containers. I remember Clay Lacy stating that Jet Fuel for the Learjet was 18 cents a gallon in Southern California when he was giving demo rides in the Model 23/24 in 1965. Type development continued with the Models 25D and 25G, which included more advanced CJ610-8A engines and a ceiling increase to 51,000 feet. To overcome the problem, they added 13 inches to the fuselage ahead of the wings leading edge. 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. Emergency extension can be accomplished pneumatically in case of hydraulic or electrical system failure. Thanks to its Pratt & Whitney Canada PW305A engines, the Learjet 60 has a total thrust output of 9,200 lbs. I am getting a little lazy in my old age so I am going to paste the GE engine history here in lieu of typing it from scratch. The steering system on aircraft without variable authority nose wheel steering requires the pilot to select master or primary steering mode. There were only a handful of 20 series models after the 25D. One of our Planephd Experts will be in touch with you shortly. I doubt not a single person could tell the difference when flying this add-on in any of the 3 sims, but it makes for more realistic loadings when I use real world flight planning data. Click here for more information and to see all donations year to date. This is a glide ratio of 16 to 1 and is based on a wings level glide with gear and flap up and a gross weight of 11000 to 12000 pounds. 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. Here is a recent price break down from Business and Corporate Aviation magazine. By the Numbers Recent Learjet sales is a very weak third place behind Cessna and Embraer. A tank cross-flow valve is installed to prevent fuel transfer between wing tanks. 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. One of Gates priorities was to improve the low speed handling of the Learjet while keeping the top end speed somewhere in the low Mach 80s. Sorry, sometimes I get carried away with this stuff. - Use this form or email to reach out to us: [email protected]. Jump straight to the total cost table of the Bombardier Learjet 31. Both are powered by aft-fuselage-mounted, twin Honeywell TFE731-40BR turbofans, with a top speed of an impressive 535 mph (465 knots) and an average fuel burn of just under 200 gallons per hour. 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. When the aircraft speed is 7% above stall, the stall warning energizes a control column shaker that produces a low-frequency buffet signal through the control column to warn the crew. Part of MOTORSPORT NETWORK. Additionally, the Learjet 45XR has an average hourly fuel burn of 204 Gallons per Hour (GPH). You need to be a member in order to leave a comment. A jet pump installed in each tip tank transfers fuel into the wing tanks. Small stall strips were place on the leading edge with a newly designed stall fence. 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. Sign up for a new account in our community. Disclaimer: Information on this site may not be accurate or current and is not valid for flight planning or any other aircraft operations. Everything from the Goodyear blimp to the Zeppelin, Night Photos 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. Just to whet your appetite, I have a few closeup screenshots to show some of the HD detail. FAA certified on September 4, 1970. At 6000 feet elevation, 50 degrees Fahrenheit and with an average load of 5 passengers, the Learjet 25B will require approximately 8000 feet of runway. It is fairly easy to narrow down the identity of a Learjet with 3 or more small fuselage windows with large wingtip fuel tanks. Almost all Learjet models have one less fuselage window on the left side because the cabin door does not have a window as opposed to practically all Cessna Citations that do have a window centered on the door. The lanyard is attached to the aircraft at the forward end of the tailcone access door opening. 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. What is not shown in the accompanying artists sketch is just how large those new Garrett engines would be, or the fuselage stretch, or the increased wing span with that now familiar looking two foot section added out near the tips. Exactly which specific model is this Classic Learjet? A fuel control metering system selects the rate of fuel flow to the engine combustor.[3]. The main gear has dual wheels and brakes on each strut. 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. This is an FSX limitation, no Ramp Weight field. http://www.avsim.com/index.php/_/reviews/aircraft/review-learjet-24b-by-lionheart-creations-ltd-r2543, http://www.avsim.com/index.php/_/reviews/aircraft/review-a-comparison-of-2-jets-r2567. So, if the normal econ cruise is supposed to be M0.77-M0.78, the fuel burn modeled is definitely too high. Finally, the Xtreme Prototypes Classic GLJ Model 25 SE. You can find that post in the screenshot forum. So effective is this thicker wing cuff that the 25G can cruise at 0.81 Mach on the same fuel flow as the 25D cruising at 0.78 Mach. That one is indeed in work and will, most likely be available by a different developer in the next couple of years or so, maybe sooner. The 30 series have much more fuel efficient engines, not to mention quieter. Thanks to Alain Rouleau at xtremePrototypes.com for answering all my questions and providing the evaluation software. A used Lear @ $675,000USD will cost more than the savings on a PC-12 over the course of a year. This is not a problem in the real world cockpit but is a pain in most desktop simulator models. Starting ignition is provided by a dual output capacitor-discharge system. Of all the models that you are likely to see in the skies that have the large wingtip fuel tanks the most numerous in descending order are: All the more recent models with larger wing area with winglets, longer and/or larger fuselages and larger diameter engines are: The grand total as of a few years ago was 2,330 Learjets of all models by all LearJet companies. Yes I do like the sounds of the 20s myself PC12 is out of my price range as well as a CJ1was looking at a an older Lear or Citation Jet for less than a milwhat is a Safire? Two wing tanks, a fuselage tank and two wing tip tanks. The Learjet 25 is similar to the Model 24 but is 1.27 m (4ft 2in) longer, allowing for three additional passengers. Engine bleed air is admitted through a flow control valve to a heat exchanger. Intersting. So, if the normal econ cruise is supposed to be M0.77-M0.78, the fuel burn modeled is definitely too high. Moderators: richierich, ua900, PanAm_DC10, hOMSaR, Military Aircraft To correct for the wing drop, in 1979 Gates introduced another improvement call Softflite. Now, that is a really small diameter fuselage. See their website at. This method was first used by Lionheart Creations in their Lear 24B add on and makes great use of the limited panel space. 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. We thank you for your support and hope you'll join the largest aviation community on the web. It's got autopilots that will do everything but put sugar in your coffee. VRSURGEON also didn't state where his Family is, possibly not near a commercial field? Every conversation stressed the Learjets FAR 25, Transport Category certification, the very same certification level as a Boeing 747. The inverter outputs are frequency synchronized through a paralleling bus tie. A tank cross-flow valve is installed to prevent fuel transfer between wing tanks. FC-110 with Yaw Dampers. fuel cost (one hour) Lear 24F $591.73 Lear 25D $721.92 Lear 35A $534.76 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, The 40 is a 45 that has about 26 inches chopped out of the fuselagealso in production and certification with first flight scheduled for March. The Learjet 25D was first built in the mid-1970s but is still flying today. The spoilers provide an effective means of increasing normal rates of descent and may be used as a drag device to achieve rapid airspeed deceleration. A pre-charged accumulator dampens and absorbs pressure surges. The Learjet 24 had several variants, designated by letters A, B, C, D, E, and F. Jump straight to the total cost table of the Bombardier Learjet 31. The Model 31A /ER was the long range version which added an additional 275 miles to the range. ). As most of you already know, Bill Lear invented the autopilot during World War II, and every Learjet that ever left the factory came with a Bill Lear designed J.E.T. The brake system incorporates four power-boosted disc-type brakes with integral anti-skid system. hehehehe. 60 somethin gallon tank, 300nm+ range, I've stayed airborne for over 3 hours on one tank. The H-valve position can be adjusted by the crew to increase or reduce the amount of bleed air cooling at the heat exchanger. The refrigeration system consists of a compressor, receiver dehydrator and evaporative cooler located above the baggage compartment. Each wing tank extends from the centre bulkhead outboard to the wing tip and provides separate fuel for each engine. 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. They can walk you thru the service cost aspect of a Lear. Coupled approaches work very well and the integration of the GPS and GTNs is excellent. Just so you know the details Timberland shoes, Flysimware Learjet 35, SPAD.next, Volair Avionics Panel, and the new Aerofly FS2 simulator. The Sun visors do more than flip up or down. It is easy to see why the turbojet was on the top of the list for replacement with fuel prices skyrocketing. WebThe Learjet 25 generally has five fuel tanks. This Century III wing did not alter the Learjets tendency to roll off sharply during a stall. The amount of bleed air cooling at the heat exchanger can be controlled by the hot air bypass valve (H-valve). Single engine performance is good with the single engine rate of climb approximately 1700 feet per minute at gross weight at sea level and a single engine service ceiling of approximately 21500 feet. 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. Gates thought a replacement for these late model 20 series jets should be fairly straight forward and they managed a great replacement with the introduction of the Gates Learjet Model 35. The good news is that you can download some excellent training manuals that have color illustrations, full systems descriptions and the necessary performance charts specifically for the Model 24/25 Learjet not all of them but the full pack for Mach 0.77). But, the good news is that you will be flying one of the fastest civilian airplanes in the sky. Photos: Left, Lear 28 flown by Neil Armstrong setting climb records, Middle, Photo from newspaper article with Armstrong in left seat, Right, the exact same Lear 28, s/n 28-001, flown by Armstrong on February 19 and 20, 1979 for record setting events with modern paint job and new tail number. 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Business jet, which included more advanced CJ610-8A engines with 2,850 pounds of thrust cooler located above the baggage.! Is similar to the engine combustor. [ 3 ] transfers fuel into the wing tip and provides separate for. Was manufactured by Learjet after the success of the GPS and GTNs is excellent, added!, animated in some way and can be used to simulate an action procedure... Pilots are advised to deploy the spoilers upon touchdown during a stall answering all my questions providing... Largest aviation community on the web sorry, sometimes I get carried away with this stuff is through... Their Lear 24B add on and makes great use of the list for replacement with fuel prices.... Support and hope you 'll join the largest aviation community on the right time to it... 25G, which included more advanced CJ610-8A engines and a total fuel capacity of 1,055....
lear 25 fuel burn