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RV10 helpful tips

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ddddsp1(at)juno.com
Guest

Posted: Tue May 29, 2007 11:46 am Post subject: RV10 helpful tips

I wanted to post a few suggestions to those building the RV10 that may save you lots of time and headaches.  I will let Tim decide if they are worthy of the website TIPS page. 

Wing tanks LEAKING?   Having first hand knowledge of this with my QB fuel tanks let me suggest the following:   

1. Don't trust they will not leak because the Factory built them. 

2. Don't trust an AIR leak test. 

3. Put 100LL in the tanks prior to PAINTING wings to verify they do not leak.  If available mount the wing on a wing rack from a paint shop.  Fill with 5-10 gals. rotate wing 90 degrees and test for leaks.  Rotate another 90 degrees and test again.  Continue until all sides have been leak tested.   Now you will not ruin you paint job if one is leaking. 

Much easier to fix a leak PRIOR to mounting or painting.   

  

Elevator Trim tab cables installed: 

When drilling the holes in the HORIZONTAL and ELEVATORS that the cables pass thru you may want to OVERSIZE them and install bigger snap bushing. WHY?  The cables are too tight when fishing them thru these tail pieces and there is no need for them to be that snug.  This mod would avoid lots of frustration and bending of the leading edges of the elevators when installing and would allow easier movement of the cables which can potentially put undue stress on the welded nuts that rivet to the elevator access panels.   

Adjusting the elevator TRIM tabs is not as easy as the manual states.  The manual says you need 35 degrees down from neutral on both tabs.  If you do this you will have no UP travel on the left tab and very little on the right tab.  You will need to compromise on your down degrees and try to get the tabs NEUTRAL at cruise to avoid excess drag. Discussing this issue with TIM and others it appears most flying RV10's are set at 25 degrees down on the left and 32-34 degrees down on the right to get a NUETRAL at cruise.  Also it will vary depending WHERE on the trim tab you measure the angle. The angle on the inner part of the tab will read less than the outer part of the tab on both sides. Measure the same area of the tab consistently. 

Hope these tips help and save you time and frustration. 

DEAN 40449   [quote][b]

- The Matronics RV10-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List

AV8ORJWC

Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"

Posted: Tue May 29, 2007 4:56 pm Post subject: RV10 helpful tips

There are even less volatile solutions which can be inserted than AVGAS, yet I agree wholeheartedly not to trust a tank because someone else built it or because it was air-checked.  At least recheck the work of others before applying paint and attempting your first flight.  

   

John 40600   

         

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of ddddsp1(at)juno.com

 Sent: Tuesday, May 29, 2007 12:44 PM

 To: rv10-list(at)matronics.com

 Subject: RV10 helpful tips  

  

   

I wanted to post a few suggestions to those building the RV10 that may save you lots of time and headaches.  I will let Tim decide if they are worthy of the website TIPS page.  

Wing tanks LEAKING?   Having first hand knowledge of this with my QB fuel tanks let me suggest the following:    

1. Don't trust they will not leak because the Factory built them.  

2. Don't trust an AIR leak test.  

3. Put 100LL in the tanks prior to PAINTING wings to verify they do not leak.  If available mount the wing on a wing rack from a paint shop.  Fill with 5-10 gals. rotate wing 90 degrees and test for leaks.  Rotate another 90 degrees and test again.  Continue until all sides have been leak tested.   Now you will not ruin you paint job if one is leaking.  

Much easier to fix a leak PRIOR to mounting or painting.    

   

Elevator Trim tab cables installed:  

When drilling the holes in the HORIZONTAL and ELEVATORS that the cables pass thru you may want to OVERSIZE them and install bigger snap bushing. WHY?  The cables are too tight when fishing them thru these tail pieces and there is no need for them to be that snug.  This mod would avoid lots of frustration and bending of the leading edges of the elevators when installing and would allow easier movement of the cables which can potentially put undue stress on the welded nuts that rivet to the elevator access panels.    

Adjusting the elevator TRIM tabs is not as easy as the manual states.  The manual says you need 35 degrees down from neutral on both tabs.  If you do this you will have no UP travel on the left tab and very little on the right tab.  You will need to compromise on your down degrees and try to get the tabs NEUTRAL at cruise to avoid excess drag. Discussing this issue with TIM and others it appears most flying RV10's are set at 25 degrees down on the left and 32-34 degrees down on the right to get a NUETRAL at cruise.  Also it will vary depending WHERE on the trim tab you measure the angle. The angle on the inner part of the tab will read less than the outer part of the tab on both sides. Measure the same area of the tab consistently.  

Hope these tips help and save you time and frustration.  

DEAN 40449  [quote]   [b]

- The Matronics RV10-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List

wcurtis(at)nerv10.com
Guest

Posted: Wed May 30, 2007 6:01 am Post subject: RV10 helpful tips

Dean,



 	  Quote: 	
		   2. Don't trust an AIR leak test.


	


Why should you not trust an air leak test?  Do you think a complex hydrocarbon molecule will fit through holes that a Nitrogen/Oxygen molecule cant?  More people catch themselves and their equipment on fire every year "testing" their tanks with actual fuel, rather than with accepted methods.  This is a dangerous suggestion.  Two years ago an A&P burned up a Cardinal testing a recently repaired tank with actual fuel.



William

http://wcurtis.nerv10.com/ 



------

- The Matronics RV10-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List

james.k.hovis(at)gmail.co
Guest

Posted: Wed May 30, 2007 6:41 am Post subject: RV10 helpful tips

In production, you fill the tank with water and apply slight air

pressure (5psi or less) then look for puddles.



Kevin H.

On 5/30/07, William Curtis <wcurtis(at)nerv10.com> wrote:

[quote] 



 Dean,



 > 2. Don't trust an AIR leak test.



 Why should you not trust an air leak test?  Do you think a complex

 hydrocarbon molecule will fit through holes that a Nitrogen/Oxygen molecule

 cant?  More people catch themselves and their equipment on fire every year

 "testing" their tanks with actual fuel, rather than with accepted methods.

 This is a dangerous suggestion.  Two years ago an A&P burned up a Cardinal

 testing a recently repaired tank with actual fuel.



 William

 http://wcurtis.nerv10.com/



 ------

- The Matronics RV10-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List

KiloPapa

Joined: 24 May 2006
Posts: 142
Location: Pearblossom, CA

Posted: Wed May 30, 2007 7:49 am Post subject: RV10 helpful tips

Dean,

  

 Thanks for the tips.

  

 Kevin

40494

tail/empennage

  

 do not archive

    [quote][b]

- The Matronics RV10-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List

_________________
Kevin
40494

do not archive

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