The American Champion Decathlon 8KCAB was developed from the basic Citabria design by Bellanca in 1970. While at first glance it looks quite similar to the Citabira, it is actually a much more capable aerobatic aircraft.
The Decathlon's wing is a completely new design with an aerofoil section much more suited to aerobatic flight. Its stick forces are much lighter and better harmonised, and it is stressed for +6g,-5g. Its engine is a more powerful 180hp Lycoming IO-360 with an inverted fuel and oil system, attached to a constant-speed prop.
These uprated specs make the Decathlon's performance superior to the Citabria in almost every way, including better climb-rate, better cruise speed, faster roll rate, and the ability to fly inverted manoeuvres. The downside to this improved aerobatic performance is slightly inferior short-field capability (the wings do not have flaps) and a slightly lower payload when compared to the Citabria.