Super Decathlon Dual Only Flight Instruction

N249MA American Champion Aircraft Model 8KCAB FAA designation is BL8
The Super Decathlon is certified in the Aerobatic Category.
The Super Decathlon is designed to withstand a maximum load factor of + 6 G’s and -5 G’s at a maximum aerobatic gross weight of 1800 lbs. Do not perform aerobatics in turbulent air.
2004 Super Decathlon with a Lycoming AEIO-360-H1B (180 HP)
MT Constant Speed 2-blade aerobatic propeller limited to 2600 RPM during aerobatic maneuvers.
Fuel 100 LL 40 gallons useable fuel, 6 quarts minimum Acrobatic oil.
The inverted fuel header tank provides fuel for at least 2 minutes of continuous inverted flight.
Maximum Gross Weight 1950, Maximum Gross Weight for Aerobatics 1800 lbs.
20 gallons of fuel x 6 + 120 pounds, ** ½ tanks for aerobatic flight
Normal Category limitations:
Speed Designation MPH
Normal Operating 54-160
VA (Normal Category) 107
Demonstrated Crosswind velocity 20
Precautionary landing approach 75
Liftoff 55-60
Climb VY 75-80
VX 58
Normal Landing Approach Speed 65-70
Short field (power on) 60
Acrobatic Category limitations:
Speed Designation MPH
VA 132
Loop – entry speeds 140-150
Aileron Roll 125
Slow Roll 130
Immelman 150
Hammer Head Turn 150
CIGARS: Controls, Instruments, Gas, Attitude, Run-up & radios, Security
GUMPSAA: Gas, Undercarriage, Mixture, Propeller, Security, Airspeed and Altitude
HASELL: Height, Airframe, Security, Engine, Lookout-clearing turns, Location
Engine Run-up 1800 RPM (elevator full back) 200 RPM maximum drop, 50 RPM max difference)
Aerobatic Propellers
On a constant speed propeller (somewhat like a car’s automatic transmission) blade pitch is adjusted by a governor, an engine-driven pump that monitors engine rpm and uses oil pressure to vary the pitch of the blades to maintain that rpm, regardless of changes in airspeed or power settings.
At high rpm, the blade pitch is low, taking a smaller bite of air and decreasing angle of attack (the propeller wants to spin faster) To reduce rpm, the governor moves the blades to a high pitch so they increase angle of attack, take bigger bites of the air, and slow the engine down.
If there is a loss of oil pressure in the governor, a non-aerobatic constant speed propeller will go to low or flat pitch (knife edge to the airflow) so that the blades will encounter no air resistance and the engine will over speed.
An aerobatic constant speed propeller has a large counterweight in each blade root. If engine oil pressure to the governor is lost in zero G or negative G maneuvers the centrifugal force of the counterweight drives the blade to high pitch so that the maximum surface area is presented to the airflow and the engine under speeds, which prevents any over speed damage.
Additional preflight items for EMT and Aerobatic flight
Pilot’s pockets empty: change, pens, etc…..
Make absolutely sure that there are no loose items in the cockpit; the smallest screw can cause controls to jam if it slips into the wrong place.
Look for all loose items in the cockpit and fuselage tail area-remove or stow!
Control movement, listen for any binding in the wings and fuselage (binding might occur because of loose items or structural distortion).
Tap the underside of the fuselage while listening to any loose items rattling about.
Check pedal attachments and seat belt attachments.
Check the door jettison handle and hinge pins.
Look for any stress wrinkles on the wing skin.
Check aileron spade or shovel-look for cracks in the plate and arm.
Bracing wires are integral structural parts of the tail surface; check wires for nicks and security.
Parachute check: FAR 91.307- 180 day inspection.
Note location of sick sack.
Preflight pilot per FAA AC 91-61: Effects of G- forces on pilot.
Aerobatic flying demands the best of both the aircraft and the pilot.
The main effects of G forces are upon the blood in the blood vessels-diminished blood flow and consequently diminished oxygen supply to the head can lead to disturbances of vision, coordination of muscular activity and in the worst case – unconsciousness.
Be especially mindful of your current physical condition.
Be careful of what and how you eat. Eat well-balanced, light meals before flying.
Keep hydrated -water is the best way.
Short flights are best; frequent exposure to G-stress may tune the human system.