Appendix – ParkZone PKZ4975 User Manual

Page 6

Optional Flaps

The Bf-109G is equipped with servo pockets in the wing

for making the flaps operational. To make the flaps

functional you will need two additional servos (PKZ1081),

the flap pushrod set (PKZ4921), and a Y-harness

(PKZ1063).

1. Plug Y-harness into the flap or gear channel of the

receiver. Plug flap servos into the y harness. Power

on radio and move the flap switch to the up position.

Turn off radio and unplug airplane. (see image 2 for

servo arm orientation in the up position).

2. Place servos in flap pockets using hot glue, silicon

glue, or double-sided servo tape. Peel back the tape

covering the servo lead and run the flap servo leads

in the same channel. Re-secure the tape over the

servo leads.

3. With the ailerons in the neutral position attach

control horn so the holes in the horn are over the

hinge line. Use the aileron control horns for position

reference.

4. Attach pushrod to servo control horn and adjust

clevis so it attaches to the control horn on the outer

hole without pushing or pulling on the aileron.

5. Cut the aileron at the panel line on the aileron. Make

sure there is 1/16 inch gap between the aileron

and flap to prevent interference between the two

surfaces.

6. Power on the airplane and radio and make sure you

are getting even throw on both flaps.

Note: When the flaps are installed the aileron area is

much smaller than when using the full span ailerons.

The roll rate in flight will be reduced. The aileron throw

can be increased to compensate for the reduced

aileron area. See step 8 for control throw for the

ailerons with flaps installed.

Note: The flap servo pockets have been positioned so

it is possible to make the inboard flaps operational. This

will require the purchase of an additional flap linkage

set. The outline for the inner flap is on the top surface

of the wing. Hinging options are up to the modeler to

implement. Picture below shows placement of additional

control horn for inboard flaps.

Appendix

Bf-109G Takeoff and Landing Tips

The ParkZone Bf-109G is an accurate rendition of the full-

size Bf-109G. Like the full size, takeoffs and landings are

more critical than previous with ParkZone warbirds.
With the large scale 3-blade propeller there is a lot

of torque that is most noticeable during takeoff. The

Bf-109G requires right rudder input during the takeoff run

to avoid veering left. If the power is applied too quickly

during the takeoff, it is possible to have the plane veer

left, and also tip the airplane, scraping the wingtips.

The torque is also noticeable in the air if the throttle is

moved from low power to full power quickly. Always use

a gradual application of power and never increase the

power to full throttle too quickly.
Due to the scale landing gear placement and angle the

Bf-109G can tip up and scrape the wingtips. The airplane

needs to be flown from the start of the takeoff run and

during landing, taking care to keep the wings level even

when rolling on the ground. Abrupt rudder inputs will

tip the plane and cause the wingtips to scrape on

the ground.
The Bf-109G is easiest to land doing a wheel landing (two

point). A wheel landing (two point) is when the airplane

touches down on the main landing gear first with the

tailwheel off the ground. The Bf-109G can be landed in

three point attitude, where all three wheels touch down

at the same time, but the wheel landing is easier to

accomplish. Because of the large prop, if the power is

pulled all the way back when landing, the propeller acts

like a large air brake. Fly the airplane down to the ground

using 1/4 - 1/3 throttle to allow for enough energy for a

proper flare.

The 30-amp E-Flite ESC comes with the brake engaged

on the Bf-109G to keep the airplane from slowing down

as quickly when the power is pulled all the way off,

instead of having the propeller freewheel and cause more

drag. it is still advisable to land with power on as it allows

more time to flare the airplane for a smooth landing.

Flaps

When using the optional flaps, the takeoffs and landings

are easier. When taking off, the tail will come off the

ground quicker allowing better rudder control during the

takeoff roll. The smaller ailerons require the wing to be

flown during the takeoff run.
During landing, the flaps allow a landing approach to

be steeper with the ability to use more throttle. The flaps

make the plane come in at a slower airspeed and make it

easier to flare and settle in for a smooth landing.