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  #1  
Old 01-16-2023, 07:57 AM
CTCole CTCole is offline
 
Join Date: Jan 2022
Location: Duluth, MN
Posts: 6
Default Heated pitot for RV-12iS?

Without re-igniting the previous thorough & informative threads on the suitability & legality of operating an RV-12 in IMC, has anyone installed a heated pitot/AOA system in their -12, willing to share details? Location and attachment of mast & controller; location, size, and attachments of wiring; use (or not) of a relay; etc. What worked or should be different?

--Chris
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  #2  
Old 01-16-2023, 11:08 AM
rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 1,006
Default Here you go

Hi Chris, I was going to respond to your PM, however, I have been asked this same question several times, so I thought I'd just go ahead and post.

DISCLAIMER: For the sea lawyers in the crowd, the information provided below is not for E-LSA builders.

I did not install the mechanical stall tab and my pitot is not in the spinner. I have a Garmin GAP 26 heated probe with AOA installed on a Gretz mounting tube installation kit.

(I think properly calibrated AOA is a much better indicator of stall indication than tab that can easily get bent... free advice for another topic)

I installed my probe in the 6th bay going outboard from the wing walk, or 5th bay inboard from the wing tip bay. It is mounted forward of the spar - if you mounted aft of the spar it would be well outside of the chord line requirement. I used two J stringers to provide a firm mounting for the mast between the two wing ribs. This location provided a very good place for accurate airspeed and AOA indication.

Works great for IMC...
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Ron Gawer

- RV10, N762G, Build in progress.
- Several others that are now just great memories for me.

Last edited by rongawer : 01-16-2023 at 04:41 PM.
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  #3  
Old 01-16-2023, 02:19 PM
thiggins thiggins is offline
 
Join Date: Mar 2020
Location: Saluda,NC
Posts: 196
Default eh?

(not trying to hijack a thread...)

E-LSA becomes experimental after issuance of the airworthiness certificate...
So, I'm not understanding your statement concerning the change and E-LSA.

https://www.kitplanes.com/understand...port-aircraft/

https://vansairforce.net/community/s...d.php?t=191858
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Donation 2023 paid
ASEL INST COMM Tail-wheeler
RV-12iS builder (Empennage complete, Wings complete!, Fuselage well under way !, finish kit ordered, Garmin avionics ordered, engine ordered, shop out of order )
Got a hangar, and moved some large pieces in!
https://eaabuilderslog.org/?blproject&proj=7buPHH99v

Last edited by thiggins : 01-16-2023 at 02:49 PM.
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  #4  
Old 01-16-2023, 03:34 PM
rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 1,006
Default

Quote:
Originally Posted by thiggins View Post
(not trying to hijack a thread...)

E-LSA becomes experimental after issuance of the airworthiness certificate...
So, I'm not understanding your statement concerning the change and E-LSA.

https://www.kitplanes.com/understand...port-aircraft/

https://vansairforce.net/community/s...d.php?t=191858
You led with the answer. Note I used the term “builder”, which I mean to be actively building. Unless Vans changes their E-LSA design to include this method I described, which is highly unlikely, the aircraft won’t meet E-LSA certification. MANY threads on this.

I’m not sure who would want to perform a rather significant change after the airplane is built, but to each their own. Enjoy.
__________________
Ron Gawer

- RV10, N762G, Build in progress.
- Several others that are now just great memories for me.

Last edited by rongawer : 01-16-2023 at 04:43 PM.
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  #5  
Old 01-16-2023, 05:11 PM
Handclutch Handclutch is offline
 
Join Date: Feb 2015
Location: Bendigo, Australia
Posts: 152
Default

I installed a Gretz heated pitot in a flying legacy RV12. It's in the stall warning inspection panel with a doubler 3"-4" wide running from the rear of the opening back to the spar to provide stiffening. Several hundred hours and no issues.

It draws 7 Amps but is only on for about 15 seconds in each minute and a half - average current draw is quite minimal.

As for accuracy - initially I flew with both pitots installed and each connected to a separate EFIS (D180 and G5). They were within a knot of each other over the entire speed range except for just above the stall where there was a 3-4 knot discrepancy. I assumed that was something to do with the different locations but found it was still there after removing the original pitot. Just a difference within the instruments.

Jack
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  #6  
Old 01-16-2023, 08:51 PM
12vaitor 12vaitor is offline
 
Join Date: Aug 2012
Location: Panama City, FL
Posts: 260
Default

I installed a Dynon heated pitot on a Gretz mast in the bay with the Stall Warning switch. My install was done after the wings were closed in, so all the work had to be done through the Stall Warning access panel hole.

I cut the Gretz mast hole first on the outside wing skin, then added a 4" wide doubler that goes the entire width between the ribs. The doubler is stepped on one side to sit above the rib flange and is riveted through the existing wingskin/rib holes on one side and has a 90 deg bend on the other side that is riveted through the side of the other rib. There is a slight curve, so you have to do some shrinking on the ends. The doubler is also riveted on the front and aft part to the wing skin between the ribs. The controller box is mounted on the backside of the stall warning access cover plate. That was done so that only two 14ga wires for power had to be run through the wing. I used two 1/4" quick disconnect bulkhead tubing connectors and a mil-circular power connector to retain the removable wing capability.

This is a lot easier to do if the top wing skin is open, but only if you are going EAB on a new build plane. I am surprised that Van's does not offer an optional kit for a heated pitot on the -12iS with the IFR package. The -12 AOA retrofit kit has a lot of the parts needed for the pitot plumbing.

John Salak
RV-12 N896HS
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  #7  
Old 01-17-2023, 08:50 AM
12vaitor 12vaitor is offline
 
Join Date: Aug 2012
Location: Panama City, FL
Posts: 260
Default

Quote:
Originally Posted by 12vaitor View Post
I installed a Dynon heated pitot on a Gretz mast in the bay with the Stall Warning switch. My install was done after the wings were closed in, so all the work had to be done through the Stall Warning access panel hole.

I cut the Gretz mast hole first on the outside wing skin, then added a 4" wide doubler that goes the entire width between the ribs. The doubler is stepped on one side to sit above the rib flange and is riveted through the existing wingskin/rib holes on one side and has a 90 deg bend on the other side that is riveted through the side of the other rib. There is a slight curve, so you have to do some shrinking on the ends. The doubler is also riveted on the front and aft part to the wing skin between the ribs. The controller box is mounted on the backside of the stall warning access cover plate. That was done so that only two 14ga wires for power had to be run through the wing. I used two 1/4" quick disconnect bulkhead tubing connectors and a mil-circular power connector to retain the removable wing capability.

This is a lot easier to do if the top wing skin is open, but only if you are going EAB on a new build plane. I am surprised that Van's does not offer an optional kit for a heated pitot on the -12iS with the IFR package. The -12 AOA retrofit kit has a lot of the parts needed for the pitot plumbing.

John Salak
RV-12 N896HS
Added some photos for reference.
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  #8  
Old 01-18-2023, 06:48 PM
CTCole CTCole is offline
 
Join Date: Jan 2022
Location: Duluth, MN
Posts: 6
Default

Thanks for the descriptions & photos! These are going to help.

--Chris
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