KANGKE INDUSTRIAL SUPER KRAFT PRO-FLY 540 User manual

SUPER
KRAFT
PRO-FLY 540
KANGKE INDUSTRIAL USA Inc.
65 East Jefryn Blvd. Deer Park New York 11729
http://www.kangkeusa.com E-mail: [email protected]
1-877-203-2377 Fax [phone]
Warranty: Kangke Industrial USA Inc. guarantees the kit to be free of defects in
both material and workmanship at the date of purchase. This warranty does not
cover any parts damaged by use or modifications. In no case shall Kangke
Industrial’s liability exceed the purchase cost of this kit. Since Kangke Industrial
has no control of final assembly and material used by user for final assembly, no
liability shall be assumed or accepted for any damage resulting from the use by
user of final use-assembled products. This kit has been flight tested for normal
use. If the plane will be used for extremely high stress flying, the modeler is
responsible for reinforcing the high stress points. Inspect this kit immediately

The KANGKE PRO-FLY 540 was designed for the extreme environment of
3-D aerobatics. The narrow fuselage has generous side area making knife
edge loops tight and round. The thick strong wing can take any flight load
you can throw at it with ease. Huge control surfaces result in astonishing
roll rates and instant pitch changes. Hover, blenders, flat spins, tumbles,
and anything else you can think of or invent are with in the capabilities of
this aircraft. Super light structures make high alpha flight a dream and all
this can be done with small electric power. The prototype flew with Hitec
HS-55 servos, Hitec Feather receiver, Phoenix 25 speed controller, Himax
2025-4200 brushless motor and a Tanic 1550 lithium-polymer battery.
Fast to assemble and fun to fly the Kangke PRO-FLY 540 is an aerobatic
pilot’s dream
WARNING KANGKE’s extensive testing procedures
insure a high quality kit that has gone through many
steps to provide you with a safe reliable airframe.
Nothing we can do however will make up for poor
assembly or irresponsible behavior at the field. A model
this size and weight traveling at 60 MPH contains
enough energy that if it were to contact another person,
the injuries would be likely serious possibly fatal. The
safe operation of this model is yours and yours alone. If
you are a beginner or have never flown a model of this
type and power, you should not make the attempt
without the help of an experienced pilot.
This manual is the sole property of Kangke Industrial USA, Inc.
Reproducing any part without the consent of Kangke Industrial USA,
Inc. is a lawful violation.
Read each step of the instructions carefully. Be sure you
understand what is required and what the procedure is before

you glue or cut anything. How well you assemble this model
will have a direct effect on its flight characteristics.
Install the landing gear with the
supplied straps and screws.
Install the tail-skid with the supplied
wood screws and two washers. Apply
a bead of medium CA where the skid
meets the fuselage.
Install the mail wheels with the
supplied collars and set screws.
Slide the main wing through the
fuselage and center at the main spar.
With the wing centered, insert a pin
on either side of the fuselage to hold it
on center during the next alignment
steps.
Pins
Measure from each wing tip to the tail
post; adjust the wing until it is square.
Medium CA
View the wing from the front to be
sure it is not tilted. When satisfied
apply a small bead of medium CA to
the junction on both sides, top and
bottom. Do not use accelerator; allow
15 minutes to cure.
Slide the stabilizer in the fuselage and
center the back edge as shown.

With the elevator centered in the
fuselage insert a pin through the
trailing edge directly under the tail.
This will hold the alignment for the
next step.
Measure from the tip on the stabilizer
to the tip of the wing and adjust until
square.
View the stabilizer from the rear and
make sure it is parallel with the main
wing. If the stabilizer is tilted insert a
pin on the top, bottom or both as
necessary to adjust the angle. See the
photo below. Apply a bead of medium
CA top and bottom, after cure remove
pins{s}.
Stick a pin in the center of each CA
flex hinge, this will keep them on
center when the control surfaces are
installed.
Pin
Install the hinges in the stabilizer,
slide on the elevator and secure with
two drops of thin CA on each side of
each hinge, remove the pins. Repeat
the process for the ailerons and
rudder.
Install the rudder and elevator servos
from the left side of the fuselage as
shown.
Pin
Install the aileron servo from the right
side of the fuselage as shown. The
servo should be centered with the

servo arm installed. It may be
installed with RTV silicone,
THICK CA, or screws.
Locate the components for the control
horn assemblies.
Install the control horns with the
clevis holes over the hinge line as
shown. Notice the offset for the
elevator rod clearance.
Install the rudder horn the same way,
but with no offset. Fabricate the
control rods with “Z” bends at the
servo arm as shown.
The same process will be used to
install the aileron horns and to
fabricate the aileron control rods.
Because of the large assortment of
motors in the 370 class, it will be
necessary to fabricate a mount for the
one you chose. Shown is the mount
used for the MPI brushless motor. It
was fabricated from ½- inch square
hard balsa.
1/2-inch square balsa
Balsa support.
Using the battery for ballast, adjust
the C.G. from 2.75-3.25 inches back
on the wing, measured against the side

of the fuselage. Small changes in C.G.
will make large changes in control
sensitivity. Adjust elevator throw for
½-inch up/down measured at the
widest part of the control surface. Set
ailerons for ½-inch up/down measured
against the fuselage. Rudder 1-inch
right/left measured at the bottom
corner.
TRIMMING BASIC FLIGHT
The Pro-fly 540 is NOT a
trainer. A true aerobatic
aircraft, it goes only where you
point it and will not recover to
level flight without control input.
If you do not have high
performance experience seek the
help of someone who does.
Line up on the center of the runway
and slowly open the throttle, using the
rudder to maintain directional
control. Once the tail is up apply a
little up elevator and allow the plane
to gently lift off the runway. Keep the
climb angle and turns shallow until
you reach a safe altitude. Reduce the
throttle to about 60% power. With the
airplane flying away from you adjust
the radio aileron trim tab till the wing
stays level. Turn and line up the plane
with the runway. Adjust the elevator
trim till the plane maintains level
flight. Once again with the airplane
flying away from you adjust the
rudder trim till the fuselage tracks
straight {it may be necessary to
correct the aileron trim after this
procedure}. Continue to fly and trim
until the aircraft is tracking well; land
before the battery runs out. Carry a
little power on final approach until
over the end of the runway, then cut
power to 10%, hold the plane just off
the runway till the airspeed bleeds off
and the plane settles on. If the landing
is too long add power go around and
try again, don’t try to force it to the
ground.
Now its time to zero out the trims. To
do this measure the control location,
center the trim tab on the radio and
adjust the servo horn for large
changes, the control clevis for small
changes. For example if after the
flight the rudder is 3/16 inch to the
right, center the radio trim and adjust
the clevis till the rudder once again
measures 3/16 right. By doing this
whenever you fly, setting the radio
trims at center will result in a well-
trimmed plane. Increase the control
travel, as you become more familiar
with the flight characteristics until
loops take about 20 feet and knife
edge can be maintained with 50%
stick deflection. Final roll rate should
be 400-450 degrees per second.
If you have followed the
procedures in this Manual you
will now be rewarded with
one of the finest flying sport
models available. All primary
and advanced aerobatic
maneuvers are at your
fingertips and the aircraft will
perform them with ease.