1-Place the swash plate leveling tool on a surface known to be perpendicular (90 deg.) to the main
shaft. This can be the upper main shaft bearing, the upper main shaft collar or the top of the main
rotor head. In some cases, the head button will have to be removed if using the top of the main rotor
head. Place shims under struts and/or skids until both levels indicate helicopter is perfectly level in
2-Move the swash plate level now on top of the swash plate. It may be necessary to first remove the
main rotor head and washout assy to provide adequate clearance for the swash plate leveling tool to
3-With radio system on, set collective to mid-range of travel. This will near 0 deg for a 3D set up or
near 2 deg for FAI, Scale or beginner set up. Adjust linkages going to swash plate as necessary until
swash plate is level in both directions. (NOTE: If you’re using the swash plate leveling tool on a
helicopter that has been flown and trimmed for flight, it is common for the swash plate to not indicate
level. This is due to the offset trim necessary for tail rotor anti-torque and center of gravity and
horizontal fin selection.). Raise collective stick to full hi pitch position while observing both levels on
swash plate leveling tool. Repeat above for full low pitch position.
4-If movement is either or both directions is observed, first check for mechanical linkages that all
should be perpendicular (90 deg) to the servo output horns. If all are found to be correct, this
unwanted movement can be electronically mixed out by activating an electronic mixer now found in
most transmitters. The most advanced transmitters now incorporate mixers with multi point mixes
that can be curved similar to a pitch or throttle curve. This is the best choice for correcting the
unwanted movement in that the amount of unwanted movement will vary by collective stick movement.
Set up mixing so that the collective is the master channel and the roll (ail) or fore/aft pitch (elev) is the
slave. In otherwords, when ever the collective channel is moved, it will automatically mix in the
appropriate correction to offset the unwanted movement. The center point of the mix will be the center
of the collective system where you first leveled the swash plate.
5-With swash plate level on swash plate and mixing function active, repeat step 3 and add correction
in mixing function as necessary until swash plate will remain level through out it’s entire range of
For more advanced set up and flight trimming check out FMP’s Ultimate heli setup tool. This tool
used in conjunction with the swash plate leveling tool will provide the most accurate setup and flight
trim available today.
Swashplate leveling tool.
Use with 10mm main
The swash plate leveling tool is an invaluable device used during the setup of any
model helicopter. This tool is used to set and check the swash plate remains
level during its range of travel. It is not uncommon to find the swash plate is level
at one setting, but moves from this position at various places through out its range
of travel. This is common on all helicopters, but even more pronounced on
helicopters utilizing CCPM collective systems. This will be more noticeable at the
extremes of the travel range such at full positive and full negative pitch.
Swashplate level for use with 12mm main shaft heli's such as the Trex 700, Synergy
and Raptor 90 now available!!! Cool new blue color unique to the 12mm swashplate
level. Each 12mm swashplate level has a special releif underneath allowing it to sit flat
on these unique swashplates.
12mm Swashplate level shown here on Trex700.
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