The B & D labeled indications on the SPI represent hydraulic systems powering the limiter actuators.
Showing posts with label Surface Position Indicator. Show all posts
Showing posts with label Surface Position Indicator. Show all posts
Wednesday, October 19, 2011
L-1011 Flight Controls: Speed Brakes - Flaps Up (27-37)
The B & D labeled indications on the SPI represent hydraulic systems powering the limiter actuators.
Wednesday, October 5, 2011
L-1011 Flight Controls: Surface Position Indicator (27-16)
The surface position indicator is located on the main instrument panel. It indicates the position of the:
- Rudder
- Stabilizer
- Ailerons, inboard and outboard (the button switches from inboard to outboard)
- Spoilers
- DLC
- Auto Pilot
- Mis-Trim Flags
Saturday, August 6, 2011
Avionics Bending: Surface Position Indicator - Pinout
The L-1011 instrument pinout for today is for the Surface Position Indicator. It is actually quite interesting to see how different the various surface position indicators are and how much they needed to be customized to the specific aircraft. The one for the L-1011 includes all the scales for DLC since the L-1011 was the only aircraft using DLC as pitch control during approach.
The Surface Position Indicator is actually a relatively simply pointer instrument that can be driven with very low voltages. See the schematic for the Surface Position Indicator below:
Here is the pinout for the instrument:
Format: Connector | Pin | Function
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