Airspeed  Relay

plus

Relay  Board

 

 

 

 

AIRSPEED  RELAY  USE:

 

1.) Protection against accidental  Flap  Deployment  Protection  at  High  Airspeeds

When our relay board is used with our airspeed switch, you can protect you flaps from being actuated in the downward direction when your airspeed is too high (above the white arc).  We provide the end user with easy connection diagrams for several different systems.

 

2.) Automatic Elevator Trim Motor Speed Adjust at different airspeeds

Many have complained about the fast adjustment speed of elevator trim motors at high airspeeds.  When our relay board is used with our airspeed switch, it eliminates this problem.  You will have two speeds, fast for slower airspeeds, and slower for high airspeeds.  The slower speed is adjusted by supplying this relay board a lower motor drive voltage. 

 

 

DETAILS for the Automatic Elevator Trim Motor Speed Adjust

1.) Connect the airspeed switch to your aircraft pitot tube and static air.

2.) Connect the airspeed switch output, to drive the relays on the relay board.  See the appropriate diagram below. 

     NOTE:  The airspeed sensor will only drive light loads such as the relay board coils.

3.) Use the output of the relay board to switch from one of two voltages that will be used to drive your elevator trim motors.

4.) The one item you will have to supply, is the alternate lower voltage source for your slower speed.  You may use simple diodes or zener diodes in series with your 12Vdc supply, or use an adjustable source like the "Ray Allen Company's" Speed Control.  Click the link below to view and/or print out a suggested connection diagram.

    (Airspeed Relay Board Connection Diagram)

 

 

DETAILS for the Flap  Deployment  Protection

1.) Connect the airspeed switch to your aircraft pitot tube and static air.

2.) Connect the airspeed switch output, to drive the relays on the relay board.  See the appropriate diagram below. 

     NOTE:  The airspeed sensor will only drive light loads such as the relay board coils.

3.) Use the output of the relay board to activate or disable your flap down electronics.  See the appropriate diagram below.

   (Flap  Deployment  Protection  Diagram)

 

 

SPECIFICATIONS:

 

   AIRSPEED SWITCH

        Pull-in airspeed adjustable with a screw driver

        Switch Current Rating:  0.04A max.

        Adjustable from 70 MPH to 160MPH

 

    RELAY BOARD

      Mounting Hardware included

       Relay contacts protected against arcing from inductive loads such as motors.

       Switch contacts

            Two relays, SPDT (Single Pole, Double Throw)

            10A max. current

            Relays are 12V relays

 

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               Ohio Residents will pay 6.75% tax.

 

NOTE:

    We can supply 24 - 28V relay boards on request.

 

AIRSPEED  SWITCH / RELAY  BOARD  COMBO,   ASRY1,   $65.00

(includes lugs for connecting wires to airspeed switch)

Price below is total price with shipping.

PLEASE select SHIPPING OPTIONS before adding to CART. 

Item -

AIRSPEED  SWITCH ONLY,   ASSW1,   $30.00

(includes lugs for connecting wires to airspeed switch)

Price below is total price with shipping.

PLEASE select SHIPPING OPTIONS before adding to CART. 

Item -