OA Temp Probe

[Robert Miller]

Looking for any ideas on where to install a outside air temp probe to feed data to a JPI EDM 700.

Thanks

[MULEFLY]

Robert... good to see your post...

On my twin they installed it on the bottom of the nose cowling... about 3 inches away from the gear door... I'm sorry I don't have a pix to post... but it seemed to make sense... I don't think it would be damaged in the event of a gear up.... (DON'T EVEN GO THERE!)

Jim

[N3322G]

Bill,

The Davtron OAT probe is on the left side of the fuselage below the pilot window. It is the new small size about 1/2 inch sticking out by 1/8 inch thick vs the old fat thumb thick by several inches that used to stick out of the windshield.

[jeffrey aryan]

Robert,

On twin my OAT is also installed on the bottom of the nose about 3 inchs away from the nose gear.
It works fine.


Jeff

[Robert Miller]

Thanks for the ideas much appreciated.

Bill

PA-24-260B
C-GBMZ

[Chris Kuyoth]

I have heard of installations in the main wheel wells. Keeps it out of the sun, away from exhaust/engine cooling and no chance of snags. Likely where I will go with mine.

In my previous Comanche, it was mounted in the roof where the ADF antenna mast used to sit.

Chris

[Don Ostergard]

Hi, Robert-
Sorry to be so slow at entering this conversation. Been laid up for several weeks with knee replacement surgery and just beginning to get my life back.

I installed a JPI EDM 830 a year ago in my '59-250. Placed the OAT probe mid-way up the pilot's side of the fuselage, an inch or two aft of the firewall. I can heartily recommend AGAINST placing it there, at least not on an early 250 with the big muffler running across the front of the firewall. Prior to startup, the EDM readout agrees with the old original "meat thermometer" probe. Once all the engine temps have stabilized and one is cruising in level flight, the JPI probe consistently reads 1 - 2 degrees C HIGHER than the original probe. (That's right - I kept the original probe. Redundancy is a nuisance until you really wish you had it.) I suspect the JPI probe is picking up some engine compartment heat due to its location. It is an unfortunate annoyance having to apply a correction to all the readings, particularly since I have the 830 wired into my Garmin 530W.

If any questions, give me a call at (403) 823-0405 or c-flhv@magtech.ca

Don Ostergard, Drumheller AB

[md11flyer]

Don:

Your Comanche is just to fast!! That is ram rise..

Happy Holidays.
Gary