advanced scale models P-61 Black Widow Montageanleitung Handbuch - Seite 14

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1. Center of Gravity

STEP 4: INSTALLING THE AIR TANK AND FILL VALVE

Air Tank

Fill Valve

Air Control

Valve

Main Gear

Nose Gear

STEP 1: HINGING THE MAIN LANDING GEAR DOORS

The air source is connected to the

middle nipple on the air control

valve.

The outer nipples on the air control

valve are for the UP and DOWN air

lines. It does not matter which one

is used for which purpose. The

only effect is that it changes which

position is up and which position is

down (which can be changed to the

pilot's preference by reversing the

retract switch on the transmitter).

The UP and DOWN air lines are

connected with "T" Fittings.

OPTIONAL LANDING GEAR DOOR INSTALLATION

❑ Install the air tank into the back of the center fuselage pod, using the

plywood support provided.

❑ Install the fill valve onto the fuselage side, making sure to tighten the

mounting nuts securely.

❑ Connect the air lines from the retracts, air tank and fill valve to the

air control valve, using the diagram at left. Use quick-connectors on the

air lines to make it easy to connect the air lines when assembling the

airplane.

❑ Cut two notches 1/8" (3mm) wide on the hinge side of each main

landing gear door. Position one notch 1-3/4" (44mm) behind the front

edge of each landing gear door and one notch 2" (50mm) in front of the

rear edge of each landing gear door.

❑ Glue two hinges to each landing gear door, making sure that the

center of each hinge pivot point is centered with the edge of the landing

gear door.

❑ Glue one balsa block underneath each hinge mounting location on

the two fuselage booms.

❑ Drill a 1/8" diameter hole into the fuselage and through the balsa

blocks for the landing gear door hinges. Make sure to position the holes

so that the edge of each landing gear door is flush the outside edge of

the fuselage booms. The holes will need to be right up against the edge

of the fuselage booms.

❑ Test-fit and hinge the landing gear doors to the fuselage booms. When

aligned properly, the landing gear doors should be flush with the fuselage

booms when closed and they should pivot freely.

iMpoRTANT You may need to sand the outer edge of the doors to

prevent them from hitting each other when closed.

CONTINuED