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Part #: 102-0054-01

Model: RCA26BK-3


Kelly Mfg.


Horizon Gyro

Part Number :

Kelly Manufacturing Logo


  • 3-inch 28V Electric Attitude Gyro Indicator with spherical display
  • Non-tumbling-can roll and loop continuously without spilling
  • AC brushless motor
  • Power failure flag
  • Blue-brown display
  • Lightweight
  • Internal 3 phase inverter produces high starting torque and increased gyro rotor speed
  • Reduced roll bearing loads
  • Gimbal caging
  • Optional fixed or moveable roll pointer (see table below)
  • Optional lighted with external replacement bulbs or non-lighted (see table below)
  • Optional panel tilt 0 to 17 degrees (see table below)
  • Optional bezel mounted slip indicator (see table below)
  • Various color schemes available upon request


Bank Range: 360 deg. (unlimited) Pitch Range: +-85 deg. min.
Pitch Trim Range: +-7 deg. min. Altitude: -1000 to +40000 ft.
Accuracy: (settling error) 1 deg. max. in roll and pitch after +-7.5 deg. of scorsby motion for 30 mintutes Accuracy: (verticality error) 1 deg. max.
Power Consumption: 17VA max. lighting 3VA max. Run-up Time: 3 minutes max. after application of power
Weight: 2.7 lbs. TSO: C4c and AS396
Part Number Horizon Gyro Description:
RCA26BK-1 28VDC, Gray/Black, Moveable pointer w/inky, 12.5 degree tilit or tilt per customer reqeust
RCA26BK-2 28VDC, lighted, Moveable pointer
RCA26BK-3 28VDC, Black/Black, Moveable pointer, Lighted, 0 or 5 degree tilt (Bell)
RCA26BK-6 28VDC, Fixed pointer (Piper)
RCA26BK-7 28VDC, Lighted (5V), Moveable pointer, 17 deg. tilt, Tilt with inky (Sikorsky)
RCA26BK-8 28VDC, Moveable pointer
RCA26BK-9 28VDC, Lighted, Fixed pointer
RCA26BK-12 28VDC, Lighted, Moveable pointer, 5 deg. tilt (Bell)
RCA26BK-16 28VDC, 6 deg. tilt, Fixed pointer (Piper)
RCA26BK-28 28VDC, Blue/Black, Fixed pointer, 5 deg. tilt (Aerospatiale)


- Horizon Gyro
Price Condition Status

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

No, not all and they could be damaged if you do.

Many legacy electromechnical attitude gyroscopic instruments include a caging device to hold the gimbals in place and 'force' the gyro gimbals to return to their home position. This instantly erects or resets the unit by pulling the caging knob. Some caged gyros include a cage lock mechanism, some do not. Some people believe that a cage-able gyro should always be in the locked position when handling, transportation, or storage takes place. This is not always the case.

For example, L3, manufacturers of the legacy AIM gyro product line, specifically indicate in their installation manuals and service letters that "instruments without cage locking mechanisms are designed to be shipped in an uncaged condition...using external locking devices to cage the indicator may result in damaging the caging system...". Southeast Aerospace has seen many people use external means to force a cage lock such as a spacer wedged between the extended shaft and knob. As indicated by L3 (AIM), this could very well damage the unit since you are forcing it to do something it might not have been made to do.

Most, if not all, gyro manufactures have detailed instructions within their installation and operation manuals that indicate how a specific model instrument should be handled, transported, and stored. This includes instructions on whether or not to cage lock the instrument or not. Always follow the manufacturer's instructions.

(Cage-able but does not have cage lock locking mechanism)

(Cage-able but has cage lock)