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Leaky air inlets on RV-9A

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ianxbrown

Joined: 16 May 2009
Posts: 80

Posted: Thu Sep 24, 2009 9:54 am Post subject: Leaky air inlets on RV-9A

My RV-9A is starting to chill my wife!  As the weather gets cooler we've noticed significant amounts of air coming in through the control stick holes and also out of the edges of the mounting of the eyeball vents.   The Van's drawing calls for the removal of the fourth hole on the mounting (the one you would catch your leg on) and this seems to result in a slightly open joint, especially under air pressure.  What have others done about both problems.   I realize putting a boot over the stick will help that area, but unfortunately I just bought nice looking automotive gear shift boots that have lots of fancy little holes in them!  Any ideas for what material would be light, flexible and draughtproof??

 

 Beautiful flying day!

 Ian Brown

 Bromont, QC, C-GOHM

HCRV6(at)comcast.net
Guest

Posted: Thu Sep 24, 2009 10:24 am Post subject: Leaky air inlets on RV-9A

I solved the leaking Van's air vent by replacing them with the beautifully machined aluminum vents that screw together and clamp that leaky bottom corner joint airtight.  The leak around the control stick requires boots around the aileron push rods at the fuselage side and an airtight stick boot.  Those two things solved 90% of the cold air leaks in my RV-6 slider.  Now my wife just complains about the slight draft on the back of her neck from the rear canopy slide.  I haven't bothered to work on that yet.



Harry Crosby

RV-6 N16CX, 616 hours



---

david.nelson(at)pobox.com
Guest

Posted: Thu Sep 24, 2009 10:24 am Post subject: Leaky air inlets on RV-9A

Hi Ian,



For the push-rod boots:



http://home.hiwaay.net/~sbuc/journal/cold.html#boots



For the air-vents, I bought a set (very nice metal ones) from Stein Air:



http://www.steinair.com/eyeballvents.htm



Regards,

 	 /\/elson



~~  Lately my memory seems to be like a steel trap .... without any spring.  ~~



On Thu, 24 Sep 2009, Ian wrote:



 	  Quote: 	
		   My RV-9A is starting to chill my wife!  As the weather gets cooler we've noticed significant amounts of air coming in through the control stick holes and also out of the edges of the mounting

 of the eyeball vents.   The Van's drawing calls for the removal of the fourth hole on the mounting (the one you would catch your leg on) and this seems to result in a slightly open joint,

 especially under air pressure.  What have others done about both problems.   I realize putting a boot over the stick will help that area, but unfortunately I just bought nice looking automotive

 gear shift boots that have lots of fancy little holes in them!  Any ideas for what material would be light, flexible and draughtproof??

 

 Beautiful flying day!

 Ian Brown

 Bromont, QC, C-GOHM

pitts_pilot(at)bellsouth.
Guest

Posted: Thu Sep 24, 2009 10:43 am Post subject: Leaky air inlets on RV-9A

Ian wrote:

 	  Quote: 	
		   My RV-9A is starting to chill my wife!  As the weather gets cooler we've 

 noticed significant amounts of air coming in through the control stick 

 holes and also out of the edges of the mounting of the eyeball vents.   

 The Van's drawing calls for the removal of the fourth hole on the 

 mounting (the one you would catch your leg on) and this seems to result 

 in a slightly open joint, especially under air pressure.  What have 

 others done about both problems.   I realize putting a boot over the 

 stick will help that area, but unfortunately I just bought nice looking 

 automotive gear shift boots that have lots of fancy little holes in 

 them!  Any ideas for what material would be light, flexible and 

 draughtproof??

Get ripstop nylon from a fabric store.  Comes in lots of colors!  You 
	


can also order stick covers and aileron pushrod covers from most 

experimental interior suppliers.

Linn

 	  Quote: 	
		   

 Beautiful flying day!

 Ian Brown

 Bromont, QC, C-GOHM

retasker(at)optonline.net
Guest

Posted: Thu Sep 24, 2009 10:43 am Post subject: Leaky air inlets on RV-9A

The main source of air coming up through your control stick area comes 

in from the wings.  An aileron boot such as Flightline Interiors sells 

would go a long way to removing that as a source of cold.  You could 

also make your own if you are good with a sewing machine.  Just use 

coated nylon or similar and make a cone shaped assembly that attached to 

your aileron pushrod and the edges of the holes in the sidewall.



See http://www.flightlineinteriors.com/products/construction/default.asp



Dick Tasker



Ian wrote:

 	  Quote: 	
		   My RV-9A is starting to chill my wife!  As the weather gets cooler 

 we've noticed significant amounts of air coming in through the control 

 stick holes and also out of the edges of the mounting of the eyeball 

 vents.   The Van's drawing calls for the removal of the fourth hole on 

 the mounting (the one you would catch your leg on) and this seems to 

 result in a slightly open joint, especially under air pressure.  What 

 have others done about both problems.   I realize putting a boot over 

 the stick will help that area, but unfortunately I just bought nice 

 looking automotive gear shift boots that have lots of fancy little 

 holes in them!  Any ideas for what material would be light, flexible 

 and draughtproof??



 Beautiful flying day!

 Ian Brown

 Bromont, QC, C-GOHM

bmeyette

Joined: 14 Mar 2007
Posts: 72
Location: Cornish, NH

Posted: Thu Sep 24, 2009 10:50 am Post subject: Leaky air inlets on RV-9A

try Abby at FLightline Interiors for aileron rod  boots

 http://www.flightlineinteriors.com/

  



   From: owner-rv-list-server(at)matronics.com  [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of  Ian

Sent: Thursday, September 24, 2009 1:38 PM

To:  rv-list(at)matronics.com

Subject: Leaky air inlets on  RV-9A

 

My RV-9A is starting to chill my wife!  As the weather gets  cooler we've noticed significant amounts of air coming in through the control  stick holes and also out of the edges of the mounting of the eyeball  vents.   The Van's drawing calls for the removal of the fourth hole on  the mounting (the one you would catch your leg on) and this seems to result in a  slightly open joint, especially under air pressure.  What have others done  about both problems.   I realize putting a boot over the stick will  help that area, but unfortunately I just bought nice looking automotive gear  shift boots that have lots of fancy little holes in them!  Any ideas for  what material would be light, flexible and draughtproof??



Beautiful  flying day!

Ian Brown

Bromont, QC, C-GOHM



 

No virus found in this incoming message.

Checked  270.13.112/2392 -  Release Date: 09/24/09 05:52:00

   [quote][b]

_________________
Brian Meyette, Cornish, NH

RV-7A QB tipup, supercharged Subaru STi engine, MT CS prop, all glass day/night/IFR panel, being built with solar and wind power

N432MM

http://brian76.mystarband.net/RV-7Ahome.htm

Vanremog(at)aol.com
Guest

Posted: Thu Sep 24, 2009 6:32 pm Post subject: Leaky air inlets on RV-9A

rainproof poncho material in olive drab is what I used for the pushrod  boots to the fuselage wall.  The stickboots are DJs.  Very little  airflow when you do the pushrod boots.

  

  

  

  In a message dated 9/24/2009 10:54:55 A.M. Pacific Daylight Time,  ixb(at)videotron.ca writes:

  	  Quote: 	
		  My RV-9A    is starting to chill my wife!  As the weather gets cooler we've noticed    significant amounts of air coming in through the control stick holes and also    out of the edges of the mounting of the eyeball vents.   The Van's    drawing calls for the removal of the fourth hole on the mounting (the one you    would catch your leg on) and this seems to result in a slightly open joint,    especially under air pressure.  What have others done about both    problems.   I realize putting a boot over the stick will help that    area, but unfortunately I just bought nice looking automotive gear shift boots    that have lots of fancy little holes in them!  Any ideas for what    material would be light, flexible and draughtproof??



Beautiful flying    day!

Ian Brown

Bromont, QC,  C-GOHM

Boot.dwg

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Charles Heathco

Joined: 10 Jan 2006
Posts: 201

Posted: Thu Sep 24, 2009 7:38 pm Post subject: Leaky air inlets on RV-9A

The thing I do re air inlets is put a strip of duct tape over the inlet 

Never had one blow off. Its aboujt time to do that again. (pull of when 

warms up) Charlie H

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PeterHunt1(at)aol.com
Guest

Posted: Sun Sep 27, 2009 6:55 pm Post subject: Leaky air inlets on RV-9A

Yes, coned shaped boots on the aileron pushrods where the pushrods exit the fuselage into the wing are very important to cutting down cold drafts.  I made mine out of sail cloth material available at the local sailing/marine store.  Use a pipe clamp to hold the small end of the cone to the pushrod and make a large donut ring to hold the large end to the fuselage opening to the wing.  The flexible cone collapses/expands like an accordion when the pushrods are moved.

  

 Pete in Clearwater

 RV-6

  [quote][b]

stan(at)vangrunsven.us
Guest

Posted: Mon Sep 28, 2009 8:42 pm Post subject: Leaky air inlets on RV-9A

Hi Ian,

  

 When we first flew the 6-A, in early spring, it leaked something  awful.  When the first passenger flew, his jacket sleeve was being tugged  at by the air leaking OUT at the upper rail where we had not sealed the slider  canopy.  What I'm saying is that the low pressure over the wing was pulling  air out of the cabin from every available hole.  When we sealed the canopy  sides above the wing most of the other areas were much more managable.  We  used some "V" seal with the opening blocking the direction of flow which is Out  above the wing and IN along the rear skirt.  Some other type seals also  work, like "P" seals where the "bulb" is flexable enough move in the direction  of air flow and get pushed against skirt or skin. 

  

 I hope this helps; many builders have never dealt with this area  first.

  

 Best wishes, 

  

 Stan VanGrunsven  RV-6A  April 1998

  

  

 [quote]   ---

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