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Heated pitot retrofit

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kahamer(at)bigpond.net.au
Guest

Posted: Thu Sep 06, 2007 7:49 pm Post subject: Heated pitot retrofit

 	  Quote: 	
		  Hi all,Wonder who difficult it would be to fit a heated pito tube once the skins are on the wing (RV7),but wings not fitted to the fuselage as yet.Anyone done this before? RegardsKarl Ahamer7A  near Sydney/Australia 	


     

  6/09/2007 3:18 PM

  

  6/09/2007 3:18 PM

     [quote][b]

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Mark Phillips in TN

Joined: 10 Jan 2006
Posts: 431
Location: Columbia, TN

Posted: Fri Sep 07, 2007 5:37 pm Post subject: Heated pitot retrofit

In a message dated 9/6/2007 10:50:52 PM Central Daylight Time, kahamer(at)bigpond.net.au writes:

  	  Quote: 	
		  Anyone done this before? 	


 >>>

 I recently installed a Gretz tube in the outboard (aileron bellcrank) cover.  I duplicated the cover in .040 2024 and made a doubler a bit larger than the base of the tube with an extension on it on which I mounted the circuit board.  Makes for easy connection & inspection.  You will have to take care when attaching tiedowns, but I believe the benefits outweigh this.  I also discussed this with Warren Gretz and he saw no downside.  Photo available if interested...

  

 From The PossumWorks in TN

 Mark Phillips

  http://websites.expercraft.com/n51pw/

  



See what's new at AOL.com and Make AOL Your Homepage.

  [quote][b]

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From The PossumWorks...

kahamer(at)bigpond.net.au
Guest

Posted: Sat Sep 08, 2007 4:09 pm Post subject: Heated pitot retrofit

            Hi Mark,thanks for reply.Great idea!  

            Regards  

            Karl  

            Do not archive  

   

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marty_away(at)hotmail.com
Guest

Posted: Sun Sep 09, 2007 7:52 am Post subject: Heated pitot retrofit

Karl,



   Just done it also.....  put my Gretz tube in the bay next to the wing 

access panel (wingtip side)



   - Thoughts to consider.....  figure how you will countersink the skin 

before doing any riveting.  I didn't and a fellow builder recommended I 

build a countersunk backplate.  By using a countersunk screw I was able to 

pull the skin into a somewhat countersunk area.... but it isn't pretty.



  - Riveting....  you'll need to poprivet the support brackets....



-  The smart chip (circuit board)   Seemed to challenging to install the 

platenuts on the rib, so I built a raised platform to mount the chip right 

on the access panel but ensured the back of the circuit panel didn't touch 

the aluminum access plate.



-  Connecting the pitot line.  Have to move the installed (aluminum) line to 

the new position.  Bought a 1/4 by 1/4 copper pipe connector in the Home 

Depot aviation isle.   Haven't bent the copper tube on the Gretz unit yet, 

but feel it's necessary to avoid a right angle in the pitot static line.



On the road, so I don't have pictures.....  Hope this helps....



Marty

RV-7 (N622HR)

Fitting systems in the fuselog...

 	  Quote: 	
		  From: "Karl Ahamer" <kahamer(at)bigpond.net.au>

Reply-To: rv-list(at)matronics.com

To: <rv-list(at)matronics.com>

Subject: Heated pitot retrofit

Date: Fri, 7 Sep 2007 13:48:07 +1000



Hi all,

Wonder who difficult it would be to fit a heated pito tube once the

skins are on the wing (RV7),but wings not fitted to the fuselage as yet.

Anyone done this before?



Regards

Karl Ahamer

7A  near Sydney/Australia

6/09/2007 3:18 PM

6/09/2007 3:18 PM




	


_________________________________________________________________

Kick back and relax with hot games and cool activities at the Messenger 

Café. http://www.cafemessenger.com?ocid=TXT_TAGHM_SeptHMtagline1

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kahamer(at)bigpond.net.au
Guest

Posted: Tue Sep 11, 2007 1:45 am Post subject: Heated pitot retrofit

Thanks Marty,

I'm still tossing up which way to go.

Regards

Karl

Do not archive



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dhall(at)donka.net
Guest

Posted: Thu Sep 13, 2007 7:27 pm Post subject: Heated pitot retrofit

I installed my Gretz during wing construction, but I think it would be

simple enough to install it after the fact.  The skin dimpling could be done

with a pop-rivet dimple set.



Here's one pic of my gretz install to help you out. There are other pics

also.  Fellow builder, Mike Stewart, advised me to use some rubber fuel

line, courtesy of autozone, to connect the gretz copper line to the aluminum

pitot run.  Using this flexible line makes it easy to connect everything

without having open access.



http://donka.net/gallery/view_photo.php?set_albumName=rv7leftwing&id=DSC0549

2

Good luck.



******************************************

 Don Hall                  

 N517DG (registered)  

 rv7 fuselage

 http://rv7.donka.net

******************************************



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dhall(at)donka.net
Guest

Posted: Thu Sep 13, 2007 7:53 pm Post subject: Heated pitot retrofit

Correction, not fuel, but vaccuum tubing... 



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Rick Galati

Joined: 10 Jan 2006
Posts: 91
Location: Lake St. Louis MO.

Posted: Fri Sep 14, 2007 4:05 am Post subject: Heated pitot retrofit

Dimpling after an assembly is built is easy and you don't have to compromise on the quality of the dimple by using screws or pop rivet dimple sets etc.  If you have the means to drill holes through a bucking bar, you can fit regular dimple dies to a spare rivet set and bucking bar by drilling holes into them and then use the dimple dies with your rivet gun.  Fitted with a male dimple die, you can use the female receptacle fitted to many C frame dimplers.  It is sized to fit a standard rivet gun.  Or you can buy the special tools needed at ATS which are essentially as I just outlined.     

   

  http://tinyurl.com/yvvr5v



  Rick Galati  RV-6A  "Darla!"

  RV-8  FWF                

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