|
-
POSTING RULES

-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|

06-24-2014, 06:04 PM
|
 |
|
|
Join Date: Jul 2005
Location: Southern California
Posts: 617
|
|
Where does OAT temp probe go?
Wow. a duplicate entry. I need to read more carefully.
Thanks Bruce.
CC
__________________
--------------------------------------------------
David Boeshaar
RV-9A - N18TD (reserved) - Fuselage.
"My greatest fear: What if the hokey pokey really IS what its all about?"
TDAircraft.com
-July-
--------------------------------------------------
Last edited by comfortcat : 06-24-2014 at 06:25 PM.
Reason: duplicate
|

06-24-2014, 10:04 PM
|
 |
|
|
Join Date: Aug 2007
Location: Wichita Falls, TX
Posts: 2,182
|
|
The builder of my RV-6 put the OAT probe in the NACA vent inlet on the right side of the fuselage just behind the engine cowl. Bad location totally. I can start the engine and watch the OAT gauge climb 10+ degrees as the engine warms up even before I let off the brakes to taxi.
One of these days whenever I get a round tuit, I'm going to relocate the probe to the underside of the starboard wing next to the inspection cover.
__________________
Neal Howard
Airplaneless once again...
|

06-24-2014, 10:10 PM
|
 |
|
|
Join Date: Jul 2007
Location: Delta, CO/Atlin, BC
Posts: 2,391
|
|
Mine is under the horiz stab, right side.
__________________
Greg Arehart
RV-9B (Big tires) Tipup @AJZ or CYSQ
N 7965A
|

06-24-2014, 11:50 PM
|
 |
|
|
Join Date: Jul 2007
Location: Pembrokeshire, UK
Posts: 224
|
|
I placed mine in the wing NACA duct and works perfectly.
__________________
Bob Ellis
www.rv-8.co.uk
G-JBTR Having a ball flying this wonderful machine
Donation July 2016
|

06-25-2014, 06:19 AM
|
 |
|
|
Join Date: Jun 2006
Location: Delaware, OH (KDLZ)
Posts: 4,196
|
|
I put them on my RV-10 next to the first access panel under each wing. Yes, I have two. Even though they are about twenty inches away from the fuselage, they seldom agree on the temp. Usually there is a 1-2 degree difference. I'm assuming that is just exhaust heat migrating to one side of the other.\
|

06-25-2014, 07:43 AM
|
 |
|
|
Join Date: Jan 2005
Posts: 626
|
|
I had moved my pitot outboard a couple of bays so I used Vans original pitot predrilled hole in my left wing to mount the OAT probe. Seems to be working great.
|

06-25-2014, 08:23 AM
|
|
Super Moderator
|
|
Join Date: May 2005
Location: Locust Grove, GA
Posts: 2,626
|
|
TAS calculations
Putting hte temp probes anywhere in the fuselage flow will give higher than normal temps due to the heat coming off of the front of the airplane, not just the exhaust heat.
I get a kick out of the temp probes in the fuselage NACA ducts and the pilots talking about their TAS and how fast they are.
I put mine out on the outboard wing inspection panels. Much different readings, and more accurate TAS readings as confirmed by flying a GPS triangle.
Vic
__________________
 Vic Syracuse
Built RV-4, RV-6, 2-RV-10's, RV-7A, RV-8, Prescott Pusher, Kitfox Model II, Kitfox Speedster, Kitfox 7 Super Sport, Just Superstol, DAR, A&P/IA, EAA Tech Counselor/Flight Advisor, CFII-ASMEL/ASES
Kitplanes "Unairworthy" monthly feature
EAA Sport Aviation "Checkpoints" column
EAA Homebuilt Council Chair/member EAA BOD
Author "Pre-Buy Guide for Amateur-Built Aircraft"
www.Baselegaviation.com
|

06-25-2014, 09:46 AM
|
 |
|
|
Join Date: Feb 2005
Posts: 426
|
|
Probe problem
I tested these probes and they are sensitive to the temperature of the mounting base as well as the probe tip. They basically integrate the average temperature of the whole probe and base. So if you put it in the NACA vent you need to insulate the base inside the aircraft so it is not warmed with cockpit heat. I did this with generous gobs of RTV and it seems to work ok.
__________________
John Adams
Seattle
RV7 600+hrs
Paid 12/2014
|

06-25-2014, 08:28 PM
|
 |
VAF Moderator / Line Boy
|
|
Join Date: Jan 2005
Location: Dayton, NV
Posts: 12,256
|
|
I think real simple - an OAT shoudl be exposed to ambient outside air (uninfluenced by engine heat) and out of the. We've got one in the under-wing NACA scoop (RV-8), one just outboard of the underwing inspection panel (RV-3), and one on the tail inspection plate (RV-6), under the Horizontal tail. All work fine.
__________________
Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
http://Ironflight.com
|

06-26-2014, 02:30 PM
|
 |
|
|
Join Date: Sep 2006
Location: Landing field "12VA"
Posts: 1,530
|
|
OTOH
this goes to show what a terrible location the plans show for a cooling air inlet on the -6. Nothing like sucking air into the cockpit that's a good 10 degrees F warmer than what should be available at altitude  for cooling occupants and avionics. If I'd known this 20 years ago, my OAT and NACA vents would BOTH be in a different location!
-Stormy
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 12:51 AM.
|