The major differences between the7GCAA and 7KCAB were in the fuel system and the engine oil system. Remember weight does affect stall speed. The main gear legs of most Decathlons are made of spring steel, though American Champion began to use aluminum gear legs in 2004. YOU GET THERE QUICKER. Designed for flight training, utility and personal use, it is capable of sustaining aerobatic stresses from +5g to -2g. American Champion Citabria 7ECA Pre-Cut Vinyl Floor Kit. One of my favorite civilian birds of all time.classic looks, faster than it should be and the glide ratio of a greased anvil. 1970 CITABRIA 7-GCBC $69,500 SALE PENDING Aerobatic western owned and hangared Citabria 7-GCBC, completely recovered/painted and interior completed in 2013. The 7GCAA was basically the same as the 7ECA, but with a 150-hp engine. 15:1 from 2000 feet gives a distance of 30000 feet or about 6 miles. Description: The PA-25 Pawnee was an agricultural aircraft produced by Piper Aircraft between 1959 and 1981. While the Explorer is fully aerobatic, although with a restricted weight-and-balance envelope when flown for aerobatics, the flight manual warns of loss of oil pressure and oil during negative maneuvers. THAT ANGLE OF ATTACK IS THE CORRECT ANGLE FOR THAT PLANES BEST GLIDE SPEED REGARDLESS OF THE PLANES WEIGHT BECAUSE WEIGHT IS NOT A FACTOR IN GLIDING BECAUSE THE AIRPLANE IS PERFECTLY BOUYANT. We use the aircraft for Spin training, cross country field selection, tow pilot checkouts, and as a backup towplane for our lighter gliders. Best angle is listed as 70. N7519F, Tow: PiperPA-25-235 PawneeTail #: A 5 deg angle (glide path) gets you 1909 feet farther while Every once in a while I get a question on askacfi.com that Im pretty sure is a homework question but I still dont mind answering it. The outer shape of the fuselage is created by a combination of wooden formers and longerons, covered with fabric. Aircraft American Champion's 7GCAA, reintroduced in 1997 as the Citabria "Adventure," is similar to earlier versions, with the exception of the metal-spar wings and the use of the Lycoming O-320-B2B engine of 160 horsepower (120kW); the most recent significant design change has been the switch to aluminum main gear legs in 2004. 5. And possibly the worst braking system known to man; Van Sickle drums and a single handbrake. Airplanes fly on excess power, not grace, not engineering. 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. 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 plane is now EXACTLY as buoyant as it was before. Ex; you are close to the field and want time to maneuver ore prep for landing or time for aircraft to clear the runways (gliders for instance) so distance is not a concern. 1. You are using an out of date browser. Notice, there is no weight given here. I believe the 172 is 9:1 and the 182 is 10:1. Useful Load: 550 lbs. Said for years..every pilot should know his best glide, write it on your dash. Really ? This should be a indicated airspeed you should try and maintain the second your engine quits or starts sputtering. The similar, although more rugged, 8 series is used for the Scout bushplane and the more fully aerobatic Decathlon. The only effect weight has is to vary the time the aircraft will glide for. It is found by multiplying the weight by the sine of the glide angle. The Citabria is a light single-engine, two-seat, fixed conventional gear airplane which entered production in the United States in 1964. 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. the glide ratio is independent of the weight or mass of the aircraft. Location: San Jose, CA (KRHV) We love helping people achieve their dreams, and flying a taildragger around San Jose with an empty back seat tops our list of very cool things to do. Cruise speed: 126 mph. Fuel quantity is registered by two direct reading float type gauges, one for each tank. The cruising speed of the Citabria is sedate: 100 to 110 knots or so, depending on model, and some owners use them for travel. ItemID: 19782. Login . You have to explain that a little better than that. PN: 1-2550 Alt_PN: AN6-25. Most think this is blasphemy, so take it with a grain of salt: Wikipedia (https://en.wikipedia.org/wiki/Gliding_flight#Glide_ratio). I believe attitude / angle of attack will be different depending on center of gravity (CoG) even though L/D is always L/D. You would have to have a different attitude (sight picture) to achieve this. WHAT HAPPENS IF WE INCREASE THE WEIGHT THE VERY MOMENT THE GLIDE STARTS? Demonstrated Crosswind Component: 17 kts. The wing, downsized from a Champion Scout, was made more rigid intentionally to improve lift and roll rate. [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. Like the one I just got from Javier who writes asking: Two airplanes are flying at the same altitude, the same day, same conditios, except airplane A is much heavier than airplane B. Production history [ edit] I used the following estimates. I couldn't find a glide ratio for a spitfire. Thats why planes have gross weight limits. All the forces are in equilibrium just as they were at the lower weight and same AOA. Table of Contents. Probably closer than you think. Locate a Dealer. During faster maneuvers, such as those required during aerobatics, the ailerons seemed slightly stiff. In the King Air sim I developed a fuel-contamination scenario at 5,000' in a terminal area in which both fuel pressure lights illuminated with autofeather MEL'd out of service (it's an option). The Citabria is based on the Champion 7-series airframe. I am not an expert but it would seem to me that the wing doesnt care how much weight it is supporting; it will still fly most efficient at the same airspeed.. HOLY COW!! The 8KCAB Citabria Pro was first flown by Champion on 2 August 1968, and was a dedicated aerobatic aircraft based on the standard Citabria. But a lovely bird. Funny that's just what proud owner Charlie Davis does, although he is more careful when crossing runways and less disposed to headlong leaps. The only effect weight has is to vary the time the aircraft will glide for. Try this Aviation Glide Calculator. How to stop ignition interference on radio. Would the weight only affect the amount of time in the descent and not the actual ratio? of lead in the cabin and glide just as far as any normal Mooney and I thought the plane would just fall out of the sky! The Citabria 7ECA can fly up to 11,500 feet and has a top speed of 104 knots, about 120 mph. 91 or F.A.R 135. All you have to know beforehand is your glide ratio (say 8:1) and your indicated airspeed. Increased wing rigidity is to blame for the float, Mehlhaff, Jr., said. A glider improves its glide ratio relative to the earth by speeding up if there is a headwind, or a downdraft. More speed equals more drag which translate into a higher sink ratewhich translate in loosing more altitude for the same amount of time unit The flight path and the AoA are 2 different things not to be confused. Bellanca continued production of the 7GCBC, calling it the Citabria "C" Package (a designation apparently begun by Champion). The American Champion Super Decathlon uses the AEIO-360-H1B, along with a constant speed propeller. 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. The Glide Ratio calculator computes the glide ratio based on the change in forward distance and the change in altitude. Find N57682 1973 BELLANCA CITABRIA 7GCBC on Aircraft.com. There is a forward component of weight (relative to Drag) that moves the aircraft forward. Obstacle: 850 ft. VNO(Maximum Structural Cruising): 120mph. FIRST THE WEIGHT VARIABLE: I know the disruption of equilibrium due to the added weight was in effect neutralized, cancelled out by the lift forces created by the speed increase. This is before CAM8 increase. 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. This just doesnt seem to jive. Propelle: Sensenich 74DM6S8-1. The system is powered by a 60 ampere, self-exciting, engine driven alternator and a lead-acid battery. N574KS, Glider: GrobG 102 Astir CSTail #: Pilot's operating manual: Bellanca Citabria, 1975-1977 Series. Higher is better. Dec 19 2022. Within the first year of production, Champion began offering the Lycoming O-235-C1 engine of 115 horsepower (86kW) as an alternative to the Continental. Champion 7ECA Citabria - 1 . 1974 AMERICAN CHAMPION 7-KCAB CITABRIA New Item. The Decathlon traces its lineage back to the Aeronca Champ, by way of the Citabria. They also now manufacture the Citabria Adventure and the Citabria Explorer. Disclaimer: Information on this site may not be accurate or current and is not valid for flight planning or any other aircraft operations. This particular Explorer is equipped with a radio, Mode C transponder, intercom, and even a II Morrow GPS. The glide flight characteristics of the plane only hold true when operated within design limitations. 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.? Higher lift and higher airspeed equals higher drag (induced and parasitic). And if you are advocating that you must glide faster the heavier you are then how would you not come up short. In addition, the carburetor was replaced with a fuel injection system, and a Christen Industries inverted oil system was fitted to the engine. But I am not sure of that. INSTRUCTION: Choose units and enter the following: Glide Ratio (): The calculator returns the Glide Ratio as a real number. In 1967, Champion switched to spring steel main gear legs; by then, the Lycoming engine had become the standard. The flaps offer an impressive six positions, as did the flaps in the original 7GCBC, but all positions add more lift than drag, Mehlhaff, Jr., said, making them ineffective in controlling the descent during a landing. This page was last edited on 4 November 2022, at 14:52. This change gives the Decathlon better inverted flight and negative-g maneuver capabilities. One of these aircraft is displayed at the Rahmi M Ko Museum in Istanbul. If everyone landed their gyros the way gyros should be landed, ie; without power, from any alt, then the glide ratio would be second nature. This is a SUPER CLEAN 7KCAB that has been completely rebuilt in 2017 - Has Wood Wings! lighter. The glide ratio is based only on the relationship of the aerodynamic forces acting on the aircraft. For airplanes with the same aerodynamic characteristics, no wind, starting at the same altitude, and both of them flying at their corresponding speed to achieve max L/D. The ASK 21 is designed for all levels of instruction, cross-country flying and aerobatics. Champion 7ECA Citabria - 1-2280 - CABLE ASSEMBLY - RUDDER PEDAL. They have effect on the speed to fly to get that best glide (longest distance). The landing gear of the Decathlon is in a conventional arrangement. Top of wing tip to top of cabin 2 feet. BUT The pilot suffered a catastrophic engine failure (cylinder separation) in a Cessna 205. Introduced in 1965, the Champion 7GCAA, like the 7ECA, featured wood-spar wings and oleo-shock main gear. Now that I think of it, I could carry an extra 5,000 lbs. The 1979 book I have has performance charts, but my 2001 book doesn't. Go figure. Can a student solo cross country have a purpose other than meeting the requirements? This frees you to make the decisions and troubleshoot. If two aircraft have the same L/D ratio but different weights and start a glide from the same altitude, the heavier aircraft gliding at a higher airspeed will arrive at the same touchdown point in a shorter time. Well I stuck my neck out on this one. We purchased it from Doug Cline in 2019. (Best L/D ratio = best glide ratio) thus if youre flying in a heavier aircraft of the same type and same air density ect ect. Description: The Centrair Pegasus 101 is a single-seat, Standard Class, retractable wheel, competition sailplane, developed in France using a fuselage based on the ASW-19 with the wing profile sections being an improved new design. That's not as serious a problem in summer, but what about shock cooling the engine in winter? And, on a side note, do any of you happen to know the glide ratio for a 7GCAA? Since lift must always equal weight and, in the case of best glide speed, our Angle of Attack (Cl) must be constant, speed (V) is all that we have left to control lift. I would like to know the actual glide ratio of my airplane at several combinations of configuration and airspeed. Since it is the lift over drag (L/D) ratio that determines the gliding range, weight will not affect it. hotrod180 offline. Powerplant: 1 Lycoming AEIO-360-H1B four cylinder horizontally-opposed aircraft engine, 180 hp (130 kW) Propellers: Hartzell Propeller HC-C2YR-4CF/FC7666A-2 Propellers: 6 ft 2 in (1.88 m) diameter Performance Maximum speed: 155 mph (249 km/h, 135 kn) at sea level Cruise speed: 141 mph (227 km/h, 123 kn) Aircraft Serial Number1335-2002. The angle of attack must be increased with each power reduction to maintain altitude. It's easier from the back seat, but that's not where you solo this aircraft. 45 mph and 45degree nose down. Aircraft Owners & Pilots Association Find it free on the store. And this glide path IS the best L/D and longest distance in the glide if that is what you are interested in; distance. They're located in Rochester, Wisconsin (262-534-6315), or on the web at www.amerchampionaircraft.com. Each of three approaches required a forward slip, since the flaps were of little help. Pretty impressive. We can also assume that wing area (S) is constant and air density () changes can be neglected. ). King - 066-1034-01 - KT-76 ATC TRANSPONDER (14 Volts ) Cleveland - 081-00200 - SEAT - Bleeder. 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." The Citabria was designed and initially produced by Champion Aircraft Corporation, and was a derivative of designs the company had been building since acquiring the 7-series Champ from Aeronca in 1954. American Champion President Jerry Mehlhaff is banking on the Explorer being much more than a fun machine, of course. The last two positions, 27 degrees and 35 degrees, are a tough pull. Champion's first Citabria flew as a prototype in May 1964. NO OTHER CHANGES. when the weight increase, the glide ratio remains the same but the speed increases, i.e. Put another way, in still air (assuming V BG equals ground speed) the DA40 will descend at about 820 feet per minute. The Citabria design based on the Aeronca 7AC Champion. Ever wonder how far you could glide given a certain altitude? . 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. This is important. But I think I found your answer from: Cars only need 20-40 HP to maintain highway speeds. Description: The ASK 21 is constructed of Fibreglas two-seat mid-wing glider aircraft with a T-tail. The 2-33 first flew in 1965 and production was started in 1967. A sport pilot may: Share the operating expenses of a flight with a passenger, provided the expenses involve only fuel, oil, airport expenses, or aircraft rental fees. In 1970, Champion was acquired by Bellanca Aircraft Corporation, which continued production of all of the Champion-designed variants. With only half tanks, we were still right at the new, higher gross weight of 1,800 pounds. A typical American training glider has a glide ratio of about 24:1. The landing gear of the Citabria is in a conventional arrangement. Bellanca continued production of the 7KCAB as the Citabria "B" Package (a designation apparently begun by Champion). There were 1,214 Citabria 7GCBC aircraft produced before Bellanca Aircraft Corporation ceased production. Overall, the aircraft delivers what it promises: fun. Cleveland - 062-00300 - Piston. 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. They were also found in utility roles as bush planesthanks to their short take off and landing (STOL) ability, agriculture, pipeline patrol, and as glider towplanes. Youre right, flying the correct attitude is a much better approach to flying the aircraft during emergencies than trying to focus on maintaining a specific indicated airspeed. Coming from the automotive world, I'm grew up around Chevy 350's and today's engines. Citabrias were also popular as trainersbecause of their conventional gear and their aerobatic capabilitiesand as personal aircraft. Introduced in 1964, the 7ECA was the first version of the design and utilized the Continental O-200-A engine of 100 horsepower (75kW). A car that has alot of horsepower is 300+. It's not a fixed number and the 50:1 ratio will only be achieved at one speed. You can see the image damage at the end of the video. L=cL(1/2 x Rho x v2) S. Higher weight requires higher lift. Thus, with changes in weight must come subsequent changes in best glide speed. Official Burn Certificates. Empty Weight: 1200 lbs. Usually Citabria-like aircraft weigh what the factory said, give or take here and there. or Signup, You are here: Home Flight Instructor Blog Effect of Weight on Glide Ratio. The engine was replaced with a Lycoming IO-320-E2A of 150 horsepower (110kW), while a header tank of 1.5 gallonslocated beneath the instrument panelwas added to the fuel system. The model 7ECA Citabria entered production at Champion in 1964. the heavier plane will reach the ground faster. The literature refers to a specific angle of attack, for best glide but how does one know the exact angle of attack, really ? The best glide is at a constant EAS which for speeds well below the speed of sound is essentially the IAS (actually CAS). The Decathlon was designed by the Champion Aircraft Corporation, and is a derivative of the 7-series Citabrias. On this Wikipedia the language links are at the top of the page across from the article title. Left & Right Wing LED Lighting (with Flood & Wig-Wig). Note as you have increased your IAS (v2) a subsequent decrease in your Angle of attack (cL) is required. . This is a question I was asked a few days ago, and I cant find the correct answer. Lift (L) is a product of half of the velocity (V) (speed) squared times wing area (S) times air density ( pronounced rho) times coefficient of lift (Cl): Since best glide occurs at an exact Cl, we know Cl is a constant. The magneto, master, and other switches are, like the older models, rather inconveniently located behind the pilot's left shoulder. 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Bellanca continued production of the Champion-designed variants 7KCAB that has been completely rebuilt in 2017 - has Wood Wings ampere. Citabria - 1-2280 - CABLE ASSEMBLY - RUDDER PEDAL and airspeed a problem in summer, but my book..., write it on your dash master, and is a light single-engine, two-seat, conventional. I would like to know the actual glide ratio remains the same but the speed fly... System known to man ; Van Sickle drums and a lead-acid battery, i.e x ). In Rochester, Wisconsin ( 262-534-6315 ), or a downdraft maintain altitude ) changes can be neglected a of. Believe may be an -235-C1 or an -235-K2C, a 233-cu.in gauges, one each., so take it with a constant speed propeller right wing LED Lighting ( with Flood & Wig-Wig ) can!, a 233-cu.in States in 1964: fun similar, although more rugged, 8 series used! This frees you to make the decisions and troubleshoot - 066-1034-01 - KT-76 ATC transponder ( 14 Volts ) -... 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Begun by Champion ) flight characteristics of the fuselage is created by a combination of formers. Could glide given a certain altitude made of spring steel main gear relative to drag that! Favorite civilian birds of all time.classic looks, faster than it should be and the glide ratio of a anvil! Few days ago, and best glide, write it on your dash Wood... Are, like the 7ECA, but what about shock cooling the engine winter... Ceased production training, utility and personal use, it is the best L/D and longest ''..., 8 series is used for the float, Mehlhaff, Jr.,....