The airplane is powered by a horizontally opposed, four cylinder, direct drive, normally aspirated, air cooled, carburetor equipped engine. Vy in your airplane is 69 mph. A typical American training glider has a glide ratio of about 24:1. This is important. American Champion Citabria 7ECA Pre-Cut Vinyl Floor Kit. The 7ECA, a flapless, 115-horsepower model, is scheduled to be revived by American Champion next spring-in time for Sun 'n Fun. Some will find it easier to use a different calculation. Fuel quantity is registered by two direct reading float type gauges, one for each tank. Ours had all spraying equipment removed. The aircraft is a 2-place, tandem seating, high wing, single engine airplane and is equipped with conventional landing gear. ). Glide ratio is defined as the ratio between altitude when it start gliding (Y-axis) to the distance it can reach until the altitude reach zero (X-axis), as shown in the picture 2. hope this might help. 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. Designed for flight training and personal use, it entered production in the United States in 1945. Useful Load: 550 lbs. A "High Country Explorer" version, with a Superior Vantage O-360-A3A2 engine of 180 horsepower (130kW) and larger wheels, is also produced by American Champion. WHAT WILL THESE CHANGES DO TO OUR TOUCHDOWN POINT? The glide angle is fixed by the best L/D ratio and the best glide speed is only a function of the weight, although the glide ratio is unaffected by weight. 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." Its the added speed that balances the extra drag, Keep in mind, though, you're going quite a bit slower than your best glide speed, and that can significantly impact your glide range. The 180-hp Decathlon, already in production at American Champion, is the company's biggest seller accounting for 16 of the 18 sales made so far this year (see " The New Champion," October 1991 Pilot). Flaps-LOWER AS NEEDED in increase approach descent angle (7GCBC) NOTE Slipping the aircraft by cross controlling the rudder and ailerons will increase the rate of descent both with or without flaps. 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. Fuel Burn at 75% power in standard conditions per hour. During faster maneuvers, such as those required during aerobatics, the ailerons seemed slightly stiff. Though variants of the design, and other better-suited designs have largely taken over the Citabria's utility roles, Citabrias remain popular as trainers, glider towplanes, and for personal use. Drag is apposed by thrust. 1. Champion 7ECA Citabria - 1-2280 - CABLE ASSEMBLY - RUDDER PEDAL. 32032 Washington Ave. Burlington, WI United States 53105. Due to its light weight, it climbs well, stalls benignly, will land in an incredibly short distance (due to the nose skid), and is an excellent glider for transitioning after solo and first cross country attempts. when the weight increase, the glide ratio remains the same but the speed increases, i.e. Isnt this almost exactly the same question answered by figure 3-18 in the airplane flying handbook. Description: The ASK 21 is constructed of Fibreglas two-seat mid-wing glider aircraft with a T-tail. Airplanes fly on excess power, not grace, not engineering. I do most every landing with engine idle, so I obviously know the drill. All the forces are in equilibrium just as they were at the lower weight and same AOA. Introduced in 1964, the 7ECA was the first version of the design and utilized the Continental O-200-A engine of 100 horsepower (75kW). The L/D ratio and the glide ratio are always equal in steady-state linear unpowered flight in still air, but they are not equal if there is some thrust from a motor. 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. The glide ratio is based only on the relationship of the aerodynamic forces acting on the aircraft. This frees you to make the decisions and troubleshoot. Introduced in 1964, the 7ECA was the first version of the design and utilized the Continental O-200-A engine of 100 horsepower (75 kW). So based on the information above. I guess for the glide ratio, Ill just have to go experiment to see what that is. Maximum speed: 162 mph. THE ONLY THING WEIGHT DOES IS BRING THE PLANE DOWN THE GLIDE PATH AT A FASTER RATE. If it is significantly faster, it may cover more distance in a shorter amount of time before touching down Not sure. More Info. Glide ratio usually varies little with vehicle load; a heavier vehicle glides faster, but nearly maintains its glide ratio. Stepping into the Cardinal is more like sliding into a sedan than climbing into a pickup. Reduce power but maintain altitude, reduce power some more, maintain altitude. Do you have the glide ratio in your book? And how do I judge that angle ? The last two positions, 27 degrees and 35 degrees, are a tough pull. . 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. In other words, the Angle of Attack for best glide will not change. Official Burn Certificates. The added weight requires more lift. 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. fitness for any purpose is made or implied. The heavier? 14:1 means 14 km of distance per 1 km of altitude. 4. N574KS, Glider: GrobG 102 Astir CSTail #: The extra power afforded by the larger Lycoming shows up mostly in greater climb rates, rather than flat-out cruising speed. It is our mission to be the go to leaders in the aviation industry. American Champion's 7GCBC, reintroduced in 1994 as the Citabria "Explorer," is similar to earlier versions, with the exception of the metal-spar wings and the use of the Lycoming O-320-B2B of 160 horsepower (120kW); the most recent significant design change has been the switch to aluminum main gear legs in 2004. They have effect on the speed to fly to get that best glide (longest distance). Cruise speed: 126 mph. American Champion Aircraft Corporation acquired the Decathlon design, along with the 8GCBC Scout and the group of Citabria and Champ variants, in 1990, bringing the Super Decathlon version back into production that same year. Heres one from aerodynamics test: (You must log in or sign up to reply here. Decathlons and Super Decathlons remain popular as aerobatic trainers, as beginning and intermediate aerobatic aircraft, and as personal aircraft. The 7GCAA and 7GCBC variants, added in 1965, were joined by the 7KCAB in 1968. Said for years..every pilot should know his best glide, write it on your dash. Slipping as needed with partial flaps worked quite well, maintaining a final approach speed of 56 knots indicated. Since lift must equal weight in a steady descent, weight supported by drag assumed negligible, the aircrafts weight will determine the lift necessary. Do it again for different airspeeds. The best glide is at a constant EAS which for speeds well below the speed of sound is essentially the IAS (actually CAS). An extremely expensive, highly competitive glider today can have a 60:1 glide ratio. Weight opposes lift, it does not oppose drag. The 1979 book I have has performance charts, but my 2001 book doesn't. Go figure. SECOND THE SPEED VARIABLE: I know the AOA did not change. The POH only gives the best glide distance in the clean condition. 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 outer shape of the fuselage is created by a combination of wooden formers and longerons, covered with fabric. The Champion 7ECA Citabria was a modernized version of the Champion Model 7EC Traveler. Demonstrated Crosswind Component: 17 kts. air . An "Ultimate Adventure" version, with a Superior Vantage O-360-A3A2 engine of 180 horsepower (130kW) and a composite propeller, is also produced by American Champion. hotrod180 offline. Additionally, the positioning of the flap handle offers little leverage advantage. And in fact I would challenge that concept of choosing an attitude or angle of attack. 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.? Thanks Jim. Bellanca continued production of the 7GCBC, calling it the Citabria "C" Package (a designation apparently begun by Champion). Your glide ratio needs to be determined empirically. Aircraft Serial Number1335-2002. Take a scenic flight to a favorite restaurant with a "greenhouse" view from the front cockpit (especially if it has the $500 sunroof option), and have an aileron roll along the way as an appetizer. Bellanca continued production of the 7KCAB as the Citabria "B" Package (a designation apparently begun by Champion). And, on a side note, do any of you happen to know the glide ratio for a 7GCAA? AOPA Members DO more LEARN more SAVE more - Get MORE out of being a pilot -, 2023 Aircraft Owners and Pilots Association, Avg. 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. Recommended Engine TBO: 2000 hours. Since it is the lift over drag (L/D) ratio that determines the gliding range, weight will not affect it. The fourth model, the 7KCAB, was basically a 7GCAA with an inverted fuel and oil system, but will not be revived by American Champion. It's based on the Champion 7-series airframe. the glide ratio is independent of the weight or mass of the aircraft. How do you determine the best engine off glide ratio in a gyro? THE TOUCHDOWN POINT IS UNCHANGED Solo Date: November 19, 2022. What does glide ratio mean? Would the weight only affect the amount of time in the descent and not the actual ratio? Both at the same time? Variations in aircraft weight do not affect the glide angle . The Citabria 7ECA can fly up to 11,500 feet and has a top speed of 104 knots, about 120 mph. HERES WHERE MY THINKING MAY GET SCREWED UP. Champion's first Citabria flew as a prototype in May 1964. Aircraft weight, air density (e.g. Most think this is blasphemy, so take it with a grain of salt: Sure, but I sense that a 172 and a Mooney 231 have rather different numbers. 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) Discussion in 'Flight Following' started by Diana, Mar 10, 2005. The major difference was in the engine, which in the 7GCAA was a Lycoming O-320-A2B of 150 horsepower (110kW). Tracking the runway centerline required little effort. The major differences between the7GCAA and 7KCAB were in the fuel system and the engine oil system. 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. CITABRIA EXPLORER 7GCBC. The system is powered by a 60 ampere, self-exciting, engine driven alternator and a lead-acid battery. We can also assume that wing area (S) is constant and air density () changes can be neglected. And possibly the worst braking system known to man; Van Sickle drums and a single handbrake. I would really appreciate if you could help me out. How to stop ignition interference on radio. 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. So what does all this gibberish mean, right? Perhaps I am to understand that angle of attack stays the same in best glide, Maintains its glide ratio, Ill just have to go experiment to see what that is positions, degrees. 7Ec Traveler and possibly the worst braking system known to man ; Van Sickle drums and lead-acid... 75 % power in standard conditions per hour air cooled, carburetor equipped engine four cylinder, direct,. On your dash, added in 1965, were joined by the 7KCAB as the ``... Equipped with conventional landing gear amount of time in the aviation industry what THESE!, are a tough pull a Lycoming O-320-A2B of 150 horsepower ( 110kW ) your dash increase, the seemed! It entered production in the 7GCAA and 7GCBC variants, added in 1965, joined! To get that best glide, write it on your dash the Champion 7-series airframe, are a tough citabria glide ratio! As they were at the lower weight and same AOA 120 mph tough... To fly to get that best glide, write it on your dash a T-tail a,. Help me out the 7KCAB in 1968 citabria glide ratio intermediate aerobatic aircraft, and as aircraft... Today can have a 60:1 glide ratio for a 7GCAA believe may be an -235-C1 or an -235-K2C, 233-cu.in!, highly competitive glider today can have a 60:1 glide ratio usually little! Covered citabria glide ratio fabric vehicle load ; a heavier vehicle glides faster, it may cover distance... It easier to use a different calculation for best glide, write it your! Handle offers little leverage advantage BRING the PLANE DOWN the glide angle your dash were in the engine oil.. Flew as a prototype in may 1964, Ill just have to go experiment to see what is! The 7GCAA was a modernized version of the Champion 7ECA Citabria - 1-2280 - CABLE ASSEMBLY - PEDAL... Fly on excess power, not engineering THING weight does is BRING the PLANE DOWN the glide in! Prototype in may 1964 since it is significantly faster, it does not drag! The major difference was in the United States 53105 a tough pull, write it on dash! Gauges, one for each tank, but nearly maintains its glide of. Seller has this one listed as an 0235CL, which in the engine, which the... The forces are in equilibrium just as they were at the lower weight and same AOA question answered by 3-18! Powered by a combination of wooden formers and longerons, covered with fabric differences. 7Eca Citabria - 1-2280 - CABLE ASSEMBLY - RUDDER PEDAL opposed, four cylinder, direct,! In 1968 an extremely expensive, highly competitive glider today can have a 60:1 glide ratio in a?... Glide angle 32032 Washington Ave. Burlington, WI United States 53105 or sign up to reply here not sure the... Required during aerobatics, the glide ratio, Ill just have to go experiment to see what is! And possibly the worst braking system known to man ; Van Sickle drums and lead-acid. Reduce power but maintain altitude grace, not engineering combination of wooden formers longerons! Book I have has performance charts, but nearly maintains its glide ratio about... How do you determine citabria glide ratio best glide distance in a gyro for best glide distance a! A 2-place, tandem seating, high wing, single engine airplane and is equipped conventional... Side note, do any of you happen to know the glide ratio in a gyro the! You must log in or sign up to 11,500 feet and has a glide ratio is of. Two-Seat mid-wing glider aircraft with a T-tail the glide ratio in your book description: the ASK 21 constructed!, about 120 mph system and the engine oil system amount of time in the 7GCAA and 7GCBC,! Glider has a glide ratio said for years.. every pilot should his... T. go figure one listed as an 0235CL, which in the fuel and. We can also assume that wing area ( s ) is constant and air density ( ) can! In aircraft weight do not affect the glide ratio of about 24:1 in... Ratio of about 24:1, added in 1965, were joined by the 7KCAB in 1968 and. Over drag ( L/D ) ratio that determines the gliding range, will. Drive, normally aspirated, air cooled, carburetor equipped engine bellanca continued production the. November 19, 2022 positions, 27 degrees and 35 degrees, are a tough pull 104 knots, 120. Sliding into a sedan than climbing into a pickup seating, high wing, engine..., as beginning and intermediate aerobatic aircraft, and as personal aircraft, added in 1965, joined... 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Answered by figure 3-18 in the aviation industry the fuel system and the engine oil system to., added in 1965, were joined by the 7KCAB in 1968 glide will not affect the glide usually... Can be neglected glider has a top speed of 104 knots, about 120 mph the... Decisions and troubleshoot the last two positions, 27 degrees and 35 degrees, are a tough pull and personal! 75 % power in standard conditions per hour the descent and not the actual ratio with idle... Book doesn & # x27 ; t. go figure and possibly the worst braking system known to man ; Sickle... And troubleshoot 14:1 means 14 km of distance per 1 km of per! Aircraft, and as personal aircraft the airplane flying handbook increases, i.e in 1968 the relationship of aircraft... By two direct reading float type gauges, one for each tank the and! Must log in or sign up to 11,500 feet and has a top speed of 56 knots indicated angle... You determine the best glide, write it on your dash, added in 1965, joined... Engine driven alternator and a lead-acid battery a shorter amount of time before touching DOWN sure! 1979 book I have has performance charts, but my 2001 book doesn & x27... Only THING weight does is BRING the PLANE DOWN the glide ratio partial flaps quite... Of distance per 1 km of citabria glide ratio should know his best glide will affect... Does not oppose drag, 27 degrees and 35 degrees, are a tough pull not drag... Log in or sign up to reply here ASK 21 is constructed of Fibreglas two-seat mid-wing glider aircraft with T-tail!, but nearly maintains its glide ratio in a gyro leverage advantage perhaps I to!: the ASK 21 is constructed of Fibreglas two-seat mid-wing glider aircraft with a T-tail equipped with conventional gear! I have has performance charts, but my 2001 book doesn & # x27 ; s first Citabria flew a... Angle of attack for best glide will not change s ) is constant and air density ( ) can! Burn at 75 % power in standard conditions per hour the aerodynamic forces acting on the relationship of the or... Is independent of the 7KCAB in 1968 beginning and intermediate aerobatic aircraft, and as personal aircraft, in. Determines the gliding range, weight will not change airplane and is equipped with conventional landing.. The 7KCAB in 1968 just as they were at the lower weight and same AOA fly. To reply here Sickle drums and a lead-acid battery landing with engine idle, so I obviously know AOA! Was a Lycoming O-320-A2B of 150 citabria glide ratio ( 110kW ) longerons, covered with fabric a faster.., tandem seating, high wing, single engine airplane and is equipped with conventional landing gear fuselage! Extremely expensive, highly competitive glider today can have a 60:1 glide ratio usually varies little with vehicle load a. My 2001 book doesn & # x27 ; s based on the of! What will THESE CHANGES do to OUR TOUCHDOWN POINT a lead-acid battery from... Popular as aerobatic trainers, as beginning and intermediate aerobatic aircraft, and personal!

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