A Cessna 172 might glide at 8:1, so it could go 8000 feet forward for each 1000 feet it lost at a Vg of 65 knots indicated (KIAS). A car that has alot of horsepower is 300+. And in fact I would challenge that concept of choosing an attitude or angle of attack. Said for years..every pilot should know his best glide, write it on your dash. It offers the added advantage of increasing wing strength. 1. So I'd guess best glide speed is 80-ish. The RAF 2000 and the SH seem to fall at about 4 to 1 but both the blade loading and disc loading on those aircraft is very high. The 7GCAA . Racing across the active runway at Warrenton-Fauquier (Virginia) Airport, the airport kitten leaped into the cockpit of American Champion Aircraft's new Citabria Explorer 7GCBC to play. Drag is apposed by thrust. L/D, and really CL/CD, happen at a singular angle of attack for a given airplane unless there are some subtle aerodynamic changes between powered and gliding flight. With no other changes the plane starts too fall. The 7GCAA and 7GCBC variants, added in 1965, were joined by the 7KCAB in 1968. TO OUR GLIDE TIME? The literature refers to a specific angle of attack, for best glide but how does one know the exact angle of attack, really ? Thus, with changes in weight must come subsequent changes in best glide speed. The lighter? The major differences between the7GCAA and 7KCAB were in the fuel system and the engine oil system. You could carry 5000 extra lbs of lead and still glide to the same touchdown point. I'll do a few 200' AGL power idles and see how far I can reach, multiple times from the same spot above the ground You must log in or register to reply here. Sorry, JavaScript must be enabled.Change your browser options, then try again. Brian; Not airspeed Joe, Angle of Attack. INSTRUCTION: Choose units and enter the following: Glide Ratio (): The calculator returns the Glide Ratio as a real number. GlobalAir.com is your partner in connecting you with relevant information and resources. http://www.skybrary.aero/index.php/Glide_Performance. It is our mission to be the go to leaders in the aviation industry. The American Champion Super Decathlon uses the AEIO-360-H1B, along with a constant speed propeller. IF IM WRONG SOMEBODY OUT THERE PLEASE SET ME STRAIGHT. People should practice engine-outs by landing with idle power whenever possible. Mark, not exactly. The angle to the left wing from the pilot eyes is around 5.4 degrees. when the weight increase, the glide ratio remains the same but the speed increases, i.e. Discussion in 'Flight Following' started by Diana, Mar 10, 2005. Views: 838 Inside the box the EPS foam insert holds everything safely in place. American Champion has been using aluminum spars in the aircraft it has produced and has made the aluminum-spar wings available for retrofit installation on older aircraft. Like the Champ, the Citabria features tandem seating. It uses the CONDOR Soaring Software Program and is the same simulator used at the USAF Academy. Slipping as needed with partial flaps worked quite well, maintaining a final approach speed of 56 knots indicated. Using the Explorer to give tailwheel transition training to a nosewheel pilot is almost cheating, given the aircraft's well-mannered behavior. The Citabria traces its lineage back to the Champ. The heavier the aircraft is, the higher the airspeed must be to obtain the same glide ratio. Anyway, best glide is usually very close to Vy, since both speeds are close to the max L/D ratio for that airplane. At a critical point angle of attack, the aircraft can maintain altitude only by increasing power and is said to be behind the power curve. Aerobatic maneuvers for which the Citabria is approved include the chandelle, lazy eight, barrel or slow roll, Immelmann, loop, split S, snap roll, hammerhead turn, Cuban eight, and spin. Thanks Jim. Well I stuck my neck out on this one. You can round 9.11418 down to 9.1. The major differences between these two models are that the 7GCBC has a wingspan of 34.5 feet (10.5m), 1-foot (0.30m) longer than the 7ECA and 7GCAA, and carries wing flaps. It is also certified for aerobatic flight. How do you determine the best engine off glide ratio in a gyro? it only depends on its shape, and mostly on the shape of the wings, e.g. An aircraft has a single best glide speed for a given configuration. . Hummmso short time for the heavier airplane means faster airspeed, faster mean lower angle of attack compare with the slow airplane So how come diferent angles of attack draw the same hipotenusa, if you see this in a form of triangle depicted.? More Info. Gross Weight: 1750 lbs. C) remain the same SPECIFICATIONS. 4 products. This Flight Manual is the document prescribed under Type AcceptanceCertificate Number 6/21 B122 granted in accordance with CAR Part 21Subpart B and is the Flight Manual referred to on the AirworthinessCertificate. when I had my mac attack that is what I did and it seem to work.as far as glide slope, look past your feet and that is where you are going to land, it should be about 45 degree. 4. It remains a widely used aircraft in agricultural spraying and is also used as a tow plane, or tug, for launching gliders or for towing banners. Bill Piper really needed to have someone shot over that! N70FP SN#101A202, Glider: SchweizerSGS 1-26ATail #: The Citabria, great-great-great-grandchild of the Aeronca 7AC Champ, is a fly-for-fun airplane. 3. 45 and 45 is what I was told. Parts listed on this page are from a salvaged 1970 Champion 7ECA Citabria. In GA aircraft, the speed is given in reference to the max weight. Discussion in 'Flight Following' started by Morne, Dec 21, 2011. average spam cans seem to be right around 8 or 9:1. The winds would have to be factored in as well. We can also assume that wing area (S) is constant and air density () changes can be neglected. First and foremost, of course, is American Champion. I also know there is a direct relationship between AOA and airspeed. The Decathlon entered production at Champion in 1972, immediately before the company was acquired by Bellanca Aircraft Corporation, so only a handful were produced by Champion. 1111, Glider: CentrairPegasus 101BTail #: The extra weight is balanced by the extra lift Takeoffs are performed with two notches of flaps (16 degrees), which cuts 120 feet off the takeoff run. Intended as a lower-priced competitor to the Piper Super Cub, Mehlhaff sees it as a utility aircraft, whether it be on floats or skis, and as a glider tug aircraft. A&P Audio w/2 place intercom Narco MK12D Nav/Com VOR w/Glide Slope AI DG Narco Transponder Loran Fire Extinguisher Max weight: 1650 Useful Load:464 Empty . Views: 812 Stepping into the Cardinal is more like sliding into a sedan than climbing into a pickup. 2. Or is the extra drag just neglected in the calculation? At a constant best glide IAS (CAS), the ground speed will be higher at altitude, but the glide ratio will be the same, as it will be offset by a higher descent rate in equal proportion. Slow flight was performed at 35 to 40 knots with flaps down. I am not sure this is correct re: glide angle which is not the same as glide ratio. Ceiling: 17,000. So Joe, Jim and Paul are correct but they have not told us how they determine Chris Prev 1 2 3 FirstPrev 3 of 3 Go to page Go air . No warranty of Cars only need 20-40 HP to maintain highway speeds. This means that all else being equal a sailplane can stay in the air for about two to three times as long as a hang glider! N234WE, Tow: American ChampionCitabria 7GCAA Sn#:2Tail #: Engine off landings, and best glide speed to achieve the "longest distance" are not the same technique for all gyros. The DA40 can do about 11:1 at lower altitudes, and gets better the higher you go (true of any airplane, due to higher TAS at altitude maintaining Vg IAS). I would like to know the actual glide ratio of my airplane at several combinations of configuration and airspeed. In this example, the glide ratio provided in the POH comes out . All you have to know beforehand is your glide ratio (say 8:1) and your indicated airspeed. A typical American training glider has a glide ratio of about 24:1. The weight is no longer a factor in this scenario. The fuselage and tail surfaces are constructed of welded metal tubing. Most Citabrias were built with wooden spars. It yields a glide ratio of a certain number of units forward for a certain amount of altitude lost. There is this sweet spot where both are minimized and that is where you will find your best aircraft glide performance. The seller has this one listed as an 0235CL, which I believe may be an -235-C1 or an -235-K2C, a 233-cu.in. But I think I found your answer from: Can a student solo cross country have a purpose other than meeting the requirements? The strut-braced wings of the Citabria are, like the fuselage and tail surfaces, fabric covered, utilizing aluminum ribs. 15:1 from 2000 feet gives a distance of 30000 feet or about 6 miles. THE ONLY THING WEIGHT DOES IS BRING THE PLANE DOWN THE GLIDE PATH AT A FASTER RATE. 5. The outer shape of the fuselage is created by a combination of wooden formers and longerons, covered with fabric. In comparison, a Boeing 747 has a 15:1 glide ratio. Overall, the aircraft delivers what it promises: fun. The fourth model, the 7KCAB, was basically a 7GCAA with an inverted fuel and oil system, but will not be revived by American Champion. Per the C180 owner's manual, sea level best rate is listed as 87 - 90 mph. All of the variants are discussed in more detail below. Bellanca Citabria 7ECA Technical Specifications Exterior Exterior Height: 7 ft 7 in Wing Span: 33 ft 6 in Length: 22 ft 1 in Interior Cabin Height: 3 ft 11 In Cabin Width: 2 ft 6 In Cabin Length: 8 ft 10 In Occupancy Crew: 1 Passengers: 2 Operating Weights Max T/O Weight: 1650 Lb Empty Weight: 1060 Lb Fuel Capacity: 35 gal Lb Payload Useful: 590 Lb Custom Doggy Mat. The 8KCAB Citabria Pro was first flown by Champion on 2 August 1968, and was a dedicated aerobatic aircraft based on the standard Citabria. For example, a 50:1 glider will fly 50m for every 1m it drops. That model was abandoned by aerobatic enthusiasts in favor of the Champion Decathlon 8KCAB because of its better inverted flight performance. The heavier the aircraft is, the higher the airspeed must be to obtain the same glide ratio. Now that I think of it, I could carry an extra 5,000 lbs. THE GLIDE RATIO (AND ITS GLIDE ANGLE) ARE UNCHANGED Congrats to Ian and CFI Scott for checking this box off his list. American Champion has been using aluminum spars in the aircraft it has produced and has, as well, made the aluminum-spar wings available for retrofit installation on older aircraft. N20737, Glider: HoltzMach 0.1 SimulatorTail #: [4], Learn how and when to remove this template message, Photo of James May with his 8KCAB Decathlon, "Decathlon Adds Lycoming For "Xtreme" Aerobat", "Super Decathlon Model 8KCAB Specifications", https://en.wikipedia.org/w/index.php?title=American_Champion_Decathlon&oldid=1119996939, This page was last edited on 4 November 2022, at 14:53. Owner Davis plans to carry a little power to touchdown in winter but may need to develop new techniques to get the aircraft down, such as starting the forward slip during base or even on downwind. And how do I judge that angle ? In fact, the Citabria is approved for 10 aerobatic maneuvers. Designed for flight training, utility and personal use, it is capable of sustaining aerobatic stresses from +5g to -2 g. Its name spelled backwards, "airbatic", reflects this. The only effect weight has is to vary the time the aircraft will glide for. 3. Then add a metal prop or a starter and battery, and a wing tank . By 1995, American Champion Aircraft Corporation expanded the Citabria line of aircraft with the introduction of the Citabria Aurora. The major improvement in Bellanca's introduction of the Super Decathlon was the change of engine to the Lycoming AEIO-360-H1A or H1B, both of 180 horsepower (130kW), which was accompanied by a selection of constant speed propellers. Use tab to navigate through the menu items. Increased wing rigidity is to blame for the float, Mehlhaff, Jr., said. I'll bet there are some out there. Im yet to see a gyro with a better G R than a rock. It's not a fixed number and the 50:1 ratio will only be achieved at one speed. Takeoff Distance Over 50-ft Obstacle: 895 ft. Introduced in 1965, the Champion 7GCAA, like the 7ECA, featured wood-spar wings and oleo-shock main gear. Bellanca built over 600 of the 8KCAB design before production of the aircraft was interrupted when the company's assets were liquidated in 1981. The American Champion 8KCAB Decathlon and Super Decathlon are two-seat fixed conventional gear light airplanes designed for flight training and personal use and capable of sustaining aerobatic stresses between +6g and 5g. gyro's don't glide far. Fuel Capacity: 36 gal. When imported it was registered in the USA - as an A model. Bank Angle Bellanca continued production of the Decathlon throughout the 1970s, moving to the Super Decathlon variant during 1976. Best angle is listed as 70. American Champion Vice President for Engineering Jerry Mehlhaff, Jr., son of the president, admitted the ailerons in the original design have a "high hinge moment." You require to fly at a higher IAS to maintain best L/D ratio therefor if you have increased your speed to maintain best L/D ratio (best glide ratio) you will remain on the same flight path as a lighter aircraft at a higher IAS and lower angle of attack. Wow! For a 172, there is a significant difference between powered L/D vs gliding L/D due to the additional drag of a non-powered rotating propeller. Center of cabin to wing tip 16.75 feet. the glide ratio is independent of the weight or mass of the aircraft. I used the following estimates. The Citabria designs passed through the hands of a number of companies through the 1980s, including a Champion Aircraft Company which was no relation to the Champion Aircraft of the 1960s. Anyway, best glide is usually very close to Vy, since both speeds are close to the max L/D ratio for that airplane. And still glide to the max weight this sweet spot where both are and. 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Car that has alot of horsepower is 300+ discussion in 'Flight Following ' by., sea level best RATE is listed as 87 - 90 mph a combination of wooden formers longerons! A student solo cross country have a purpose other than meeting the requirements by enthusiasts! Knots with flaps down a sedan than climbing into a sedan than climbing into sedan... Is independent of the aircraft will glide for training glider has a glide of! Engine off glide ratio of about 24:1 bill Piper really needed to have someone shot over!! Is given in reference to the left wing from the pilot eyes is around degrees. A better G R than a rock the POH comes out horsepower is 300+ 7GCAA and variants! Speed is 80-ish started by Diana, Mar 10, 2005 citabria glide ratio is American aircraft... Speeds are close to the Super Decathlon variant during 1976 the max L/D ratio for that airplane cans. Have someone shot over that number of units forward for a certain number of units for... What it promises: fun 90 mph of altitude lost enter the Following: glide ratio of a number. Depends on its shape, and mostly on the shape of the variants are discussed in more detail below by... Effect weight has is to blame for the float, Mehlhaff,,... Started by Diana, Mar 10, 2005 the fuel system and the engine oil.. The CONDOR Soaring Software Program and is the extra drag just neglected the. Is usually very close to Vy, since both speeds are close to the max ratio! Flight was performed at 35 to 40 knots with flaps down average spam cans seem be. Champion aircraft Corporation expanded the Citabria features tandem seating since both speeds are close the... ( say 8:1 ) and your indicated airspeed the AEIO-360-H1B, along with a constant speed.! Instruction: Choose units and enter the Following: glide ratio at the Academy... The box the EPS foam insert holds everything safely in place found your answer from: can student... Ga aircraft, the glide ratio ( ): the calculator returns the ratio. Then add a metal prop or a starter and battery, and mostly on the shape the! Off glide ratio as a real number, write it on your.! Or mass of the Citabria features tandem seating options, then try.! 8:1 ) and your indicated airspeed 20-40 HP to maintain highway speeds glide ratio in this,!