User Manual for E-flite Twin Otter 1.2m RC Airplane

Quick guide from the manual

The E-flite Twin Otter 1.2m is a sophisticated hobby product requiring basic mechanical ability. Before your first flight, ensure the battery is fully charged, the transmitter is set up according to the provided chart, and the Center of Gravity (CG) is verified at 45mm from the leading edge of the wing at the root. Always perform a control direction test and an AS3X control direction test before flying.

Model Assembly

Landing Gear Installation: Loosen the screw on the bottom of the fuselage to remove the cover. Remove the six mounting screws from the clamps. Press the landing gear into the clamps until it snaps into position, then reinstall the gear in the fuselage and secure with the screws. Reinstall the cover and press the strut covers onto the wheel struts.

Propeller Installation: Determine the correct spinner and propeller for each side. Install the propeller adaptor on the shaft. Attach the left propeller (7056C) and right propeller (7056CR) to their respective adaptors, secure with the nut, and install the spinner with a 2mm x 10mm machine screw.

Horizontal Tail Installation: Slide the horizontal stabilizer into the hole in the vertical tail. Thread the four screws on the underside. Snap the elevator and rudder clevises into place, then snap the horizontal stabilizing fins into position.

Transmitter and Receiver Setup

Receiver Installation (PNP): Mount the receiver parallel to the length of the fuselage using double-sided servo tape. Ensure control surfaces are attached to the correct ports.

Transmitter Setup: Start with a blank ACRO model. Set dual rates (High 100%, Low 70%), expo (High 20%, Low 15%), servo travel (100%), and throttle cut (-130%). Refer to the specific transmitter chart in the manual for detailed channel assignments and flap settings.

SAFE Select and AS3X Technology

SAFE Select: This feature provides flight envelope protection. It can be configured to be always OFF (AS3X mode), always ON, or switch-assignable. Binding the aircraft in a specific manner determines if SAFE Select is enabled or disabled.

AS3X: This stabilization system is active whenever the battery is connected and the throttle has been raised above 25%. It helps the aircraft fly smoothly. If the aircraft oscillates, check for loose components or incorrect trim settings.

Maintenance and Repairs

Motor Service: Always disconnect the flight battery before service. Remove the spinner, propeller, and cowling screws. Disconnect motor wires from the ESC and remove the motor from the X-mount. Reassemble in reverse order, ensuring wire colors match.

Repairs: The EPO foam can be repaired using various adhesives like hot glue, CA, or epoxy. Do not use CA accelerant on the aircraft as it can damage the paint.

Troubleshooting

If the aircraft fails to bind, ensure the transmitter is not too close to the aircraft, the bind plug is installed correctly, and the battery is charged. If the aircraft experiences reduced flight time, check the battery charge, ensure the propeller is installed correctly, and ensure the battery is warm before use.