AIRFRAME

Question 1

What is the airframe constructed of?

Answer 1

• Semi-monocoque (internal supports and metal skin that shoes the load)
• Similar to a human skeleton
• Alloy frame
• Steel engine mounts & LDG gear
• Fiberglass nose cone
• Cowling nose bowls
• Wing tips
• ABS thermoplastic or fiberglass extremities

Question 2

Doors on the PA44

Answer 2

• Entry/Exit door forward right side
• Cargo door aft right side
• Emergency egress forward left side (pilot window)

Question 3

The wings construction

Answer 3

• Wings are semi-tapered (constant chord or width that tapers toward the tip)
• Attached to the fuselage by one main spar & two auxiliary spars (front/rear)
• The rear spar takes torque & drag loads & is a mount for flaps & ailerons

Question 4

Main Spar

Answer 4

• Attached to fuselage by inserting butt ends of spar into a spar box carry-through
• This creates a continuous spar

Question 5

Empennage

Answer 5

• Vertical stabilizer, all moveable horizontal stabilator & rudder
• Stabilator mounted on the vertical fin & incorporates an anti-servo tab (longitudinal stability/trim)
• Moves same direction as stabilator