WTB - airspeed pressure switch (M20E)

[irishpilot]

Hey all,

I'm looking for an airspeed pressure switch for a 1965 M20E. I heard the switch is the same for E and F models. If you have one in good working order, please let me know. 

[KSMooniac]

Are you sure you have one?  I thought they used a squat switch on the left main gear like my early J.  I think the airspeed switch came later, but I could be mistaken.

Edited March 28, 2016 by KSMooniac

[irishpilot]

I am sure my plane does. It is electric gear. Not the J bar.

Sent from my SM-G900V using Tapatalk

[carusoam]

Squat switch came with the early electric gear.

airspeed switch came with later electric gear.  My 94 O has an airspeed switch.

Best regards,

-a-

[KSMooniac]

My J is electric gear as well and does not have the airspeed switch.  It uses a squat switch on the gear, and I believe that configuration was carried over from the C/E/F/G models with electric gear.  I believe the airspeed switch started in 1978.

[Marauder]

Squat switch came with the early electric gear.

airspeed switch came with later electric gear.  My 94 O has an airspeed switch.

Best regards,

-a-

This tidbit of confusion came up before. There are planes built in the 1960s that have the airspeed switch. They went from air to squat to air again (I also think they started with squats as well).

The 74 models to one of the early J models have squat switches. They then switched back over to air switches.

The bigger question is whether or not the airspeed switch on his plane is the same as the later model's switch.

[KSMooniac]

Interesting... I didn't know they had the A/S switch earlier!  I've read these are frequently damaged during a pitot-static system check.  I'm glad I don't have one.

[Ron McBride]

Call Lasar.  they will have the switch. they replaced mine last August, I don't remember the cost though.

I have 69f.

Ron

 

[Jerry Pressley]

i have the squat switch.   yours is gold in color if i remember correctly. pressley   acpartswhse 423 231 3491

[cnoe]

Forgive my dumb question but... where would the air-switch be located and what does it look like. I'm still learning about my bird but don't remember seeing this on my '78J.

[KSMooniac]

1 hour ago, cnoe said:

Forgive my dumb question but... where would the air-switch be located and what does it look like. I'm still learning about my bird but don't remember seeing this on my '78J.

It should be plumbed into the back of the airspeed indicator.

[cnoe]

1 hour ago, cnoe said: Forgive my dumb question but... where would the air-switch be located and what does it look like. I'm still learning about my bird but don't remember seeing this on my '78J.

It should be plumbed into the back of the airspeed indicator.

Is it the big canister piggy-backed on the ASI in this pic? Just curious.

[KSMooniac]

That is it!  Looks different than the one I removed from my '81 J salvage, though.  I wonder if that is a newer replacement.  These things can be damaged during a pitot-static check, so always make the technician aware of the switch.