Pre Flight Procedure Sid Frede

Pre Flight Procedure Sid Frede
Everyone RC pilot develops a personal pre-flight check list, just like a full scale pilot. It is especially
important for Giant Scale pilots who have thousands of $ in the air!
As part of Team Kaos knowledge base I would like to start a Tips&Tricks library of the combined
knowledge of Team Kaos pilots.
As I look back at the past 3 years I have been flying iMAC and the knowledge I have gained from other
pilots, I am amazed by the complexity of this hobby and the knowledge required to be successful.
We all have learned Tips&Tricks over the years that we use on a daily basis. I would like to establish an
archive of those items to share with Team Kaos members.
The first one I would like to address is pre-flight check list. Through others and my own experience, I
have developed a personal check list that works for me. I will outline my check list and ask that others
add things that they also incorporate. As a result I can summarize a suggested pre-flight for new Team
Kaos members.
Let’s discuss…..
Pre Flight Procedure
Sid Frede
When assembling my plane I try not to talk with other people. If someone wants to have a
conversation or has questions, I will interrupt my assembly. I find I have a process and sequence of
items on my check list, and if interrupted I may miss something. Even when my son is able to fly with
me and he would like to assist, he knows that even though he would like to help, that it is not
required. Just as when he takes me flying in full scale, I stand back out of his way when he is doing his
pre-flight. I certainly don’t want to break his concentration and cause him to miss a critical checkpoint.
Remove fuselage from vehicle.
Remove canopy
Inspect exterior of fuselage for visual damage, monokote tears, structural issues
Inspect tail wheel and main gear. Look for worn tires, loose bolts and nuts, broken or stretched
springs, loose collars, etc
Check battery status with meter and 1Amp load. I use LiIon batteries. Fully charged they read
about 8.4 volts. Under 1Amp load they should not read below 8.1V. This verifies that I did
charge my batteries before coming to the field, and that they hold their voltage under load. If
you use LiFe batteries, voltage is not a good measure. Voltage remains at 6.6V until discharged
and then immediately goes to failure. You must verify your typical fight mah usage and then
adjust the number of flights to discharge no more that 50% of the battery mah capacity.
o For my 40%, by recording charge history after previous flights, I know that each flight
requires approximately 400-500mah for the total servo load and 200-250mah for
ignition. When charging the batteries after flying I monitor the input charge. If it is
significantly different from normal, I look for a problem. (Servo going bad, buzzing,
aileron servos out of balance and fighting each other, control arm loose or damaged
causing binding, etc. )
Check battery mounts (I had a battery mount come loose, disconnect the deans connector, and
power down one of the dual receivers causing dead stick)
Connect all battery leads
Verify fuel tank is secure and undamaged
Check fuel line connections
Look for any damaged internal structure – damaged or loose bracing, cracks, etc
Look for any damaged/tangled wires. Visually inspect switch connections
Verify Optical ignition fiber connection is tight
Verify receivers are secured and all servo leads are secure
Verify antennas are secured and undamaged
Verify throttle servo mount is secured and servo arm connection is secure
Install Horizontal Stabs
o Make sure stab clips are tight and secure in fuselage
o Install left stab
 Servo check: Repeat for every servo
 Verify servo screws are secure
o I have had servo mounting block epoxy dry out and release on
older plane
 Examine all control rod connections at servo arm and horn
 Check bolts, lock nuts, control arm etc
 Connect servo lead and secure with locking clip
 Tighten Stab blots
o Install right stab
 Repeat procedure
Install wings
o Insert wing tube
o Install left wing on tube
 Rotate to vertical position and perform servo check as per above.
 Inspect for any surface or structural damage
 Tighten both wing nuts equally
 Connect servo leads and secure with clips
o Repeat for right wing
Verify control service operation before installing canopy
o I have installed canopy and then discovered I forgot to connect ailerons!
o Turn on one battery and verify all surfaces respond as expected
o Turn off 1st battery and turn on 2nd battery and verify surfaces respond
 You are now confident if you were to lose connection with one receiver that you
will retain control and be able to land
Fuel up while you can visually see tank
o Check for any leaks before installing canopy
Install canopy
I am now almost ready to fly
Proceed to flight station
Turn on radio
o Verify switches are in right position for take off
Turn on one battery and listen for response
Turn on second battery and listen for response
Full left aileron
o Grab left aileron and verify hinges are secure and servo response is strong
 I once had servo mounting block come loose and discovered it in this preflight
check before takeoff!
Full right aileron
o Same
Full up elevator
o Grab each elevator half and verity hinges are secure and servo response is strong
 I once had a bad elevator servo on takeoff. Right elevator half locked at about
15 degrees. I was fortunate I was still able to retain control and land! Had I
done this pre-flight check, I would have discovered it before takeoff
o Rudder – check in same manner
o Turn on ignition battery
o Start engine
o Verify proper throttle response
o Check land idle and flight idle and adjust if necessary
o Take off and enjoy!!!!
Torque propeller bolts every 10 flights
Range check every flying session ( I don’t do this one but I will try to do so in future)
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