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  #11  
Old 01-20-2020, 05:52 PM
RV8JD's Avatar
RV8JD RV8JD is offline
 
Join Date: Jan 2005
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Quote:
Originally Posted by gmcjetpilot View Post
Keep in mind there is NO PERFECT PLACE FOR A STATIC PORT. THE BEST PLACE IS ABOUT 100 FEET BEHIND THE RUDDER..... Seriously.

https://www.youtube.com/watch?v=kZsi4A5PcTw
Using a trailing static cone for A/S calibration, just like the big boys. I was hoping to see comparison data for a cruise point or two.

Thanks for posting that.
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Carl N.
Arlington, WA (KAWO)
RV-8, 790 Tach Hours
(Pic 1),(Pic 2)
- Out with the Old, In with the New
(Pic)
RV-8, 1938 Tach Hours (Pic 1),(Pic 2) - Sold

Glasflugel Standard Libelle 201B - Sold
Rolladen-Schneider LS1-f - No longer owned

Last edited by RV8JD : 01-20-2020 at 05:57 PM.
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  #12  
Old 01-20-2020, 06:19 PM
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mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
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Quote:
Originally Posted by bjdecker View Post
Just my opinion -- patch it, put the static port in the location as per the plans.

Don't wig-out about the patch; just debur both sides of the hole, slather a little JB Weld on a small piece of scrap aluminum (1/2" square or thereabouts) and glue it to the back side of the fuse skin, scrape off the excess that oozes out, then sand flat when dry.
No...don't do this...the skin is structural. Follow 43:13 to make a patch.
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Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
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  #13  
Old 01-20-2020, 07:03 PM
Sue Sue is offline
 
Join Date: Nov 2012
Location: Ok
Posts: 94
Default Hole

Just put in a 1097 #10 rivit.
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  #14  
Old 01-20-2020, 07:29 PM
burtj burtj is offline
 
Join Date: Jan 2007
Location: Spokane, WA
Posts: 35
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I put mine in the wrong place because the idiots at Van's had the plans wrong. Or the canoe was upside down but my thinking wasn't 🛶🙃😅
In any case, I put a flush rivet in the hole and put the port in the right place. Then, because I know how we are, I put another rivet to nowhere in the corresponding wrong place on the other side. Now the wisenheimers at Oshkosh aren't sure if it's a mistake or a super secret mod that they can't live without 😉
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  #15  
Old 01-20-2020, 07:32 PM
Jpm757 Jpm757 is offline
 
Join Date: May 2013
Location: Sherman, CT
Posts: 794
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Ralph is right, over the years the static ports HAVE been depicted on both locations. The RV6 plans, RV7 plans and Vans pitot/static kit all may show different locations. I located the static ports on my RV6 & RV7 in the same (old, forward) location, and it has worked just fine. Even the gang at Van's signed off on it. Leave them where they are and build on.
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RV6 #20477 completed 1991 sold.
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Last edited by Jpm757 : 01-20-2020 at 07:34 PM. Reason: Edit
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  #16  
Old 01-20-2020, 08:10 PM
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bhester bhester is offline
 
Join Date: Jan 2005
Location: Hopkinsville, KY
Posts: 957
Thumbs up They will be fine

I put mine here in 2005 and they have been fine. the directions said to install them here, after I did the drawing showed them further back.
Mine work just like they should.
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Last edited by bhester : 01-20-2020 at 08:15 PM.
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  #17  
Old 01-20-2020, 08:49 PM
Davea320 Davea320 is offline
 
Join Date: Nov 2015
Location: Osage, IA
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May just put in Van?s static port in wrong holes and Safeair ports in new correct holes and tell folks I have a double redundant system.

That?s what makes it unique to the builder right? See if folks at OSH can figure it out.

Dave
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  #18  
Old 01-20-2020, 09:49 PM
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RV8JD RV8JD is offline
 
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Quote:
Originally Posted by burtj View Post
I put mine in the wrong place because the idiots at Van's had the plans wrong. Or the canoe was upside down but my thinking wasn't ������
That's interesting. On my QB RV-8 the Static Ports are much lower than the plans call for, about 4" UP from the lower longeron (but at the correct longitudinal location). They should be 4" DOWN from the upper longeron. It's as if the Static Port holes were drilled at the factory with the canoe upside down and the plans were misread. I have done 3 and 4 leg GPS runs and my indicated TAS is about 4 MPH fast, but I haven't done anything yet to fix that.




Correct vertical location is 4" DOWN from the upper longeron:



My previous QB RV-8 has the Static Ports in the correct vertical and longitudinal location.
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Carl N.
Arlington, WA (KAWO)
RV-8, 790 Tach Hours
(Pic 1),(Pic 2)
- Out with the Old, In with the New
(Pic)
RV-8, 1938 Tach Hours (Pic 1),(Pic 2) - Sold

Glasflugel Standard Libelle 201B - Sold
Rolladen-Schneider LS1-f - No longer owned

Last edited by RV8JD : 01-20-2020 at 10:12 PM.
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  #19  
Old 01-21-2020, 12:21 AM
Cumulo Cumulo is offline
 
Join Date: Apr 2015
Location: KHMT
Posts: 55
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I did a static port mod years ago on a certified a/c to improve the airspeed accuracy, so I've been there.
The general effect of fore and aft location of the static port on the aft side of a low wing aircraft is:
forward toward the wing = higher indicated air speed,
rearward toward the tail = lower indicated air speed.
I have no idea what the effect of vertical location on a slab sided a/c would be, though I guess it would be slight if it is well away from the top or bottom edge.

Related story: I asked why the altitude hold of the company's Aero Commander was crazy. The answer was that it had made the rounds to all the various shops in socal and no one could fix it. I noticed in the air, though, that if I bumped the nose up, the VSI would initially go down then up. Well that was it, it all has to do with the factory location of the static port and the effect of the high wing balanced by the fuselage pressure pattern giving good steady state static pressure results, but poor dynamics. Even the big boys get it wrong from time to time. Be glad you've got Van.

Ron
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  #20  
Old 01-21-2020, 08:13 AM
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rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
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Quote:
Originally Posted by RV8JD View Post
That's interesting. On my QB RV-8 the Static Ports are much lower than the plans call for, about 4" UP from the lower longeron (but at the correct longitudinal location). They should be 4" DOWN from the upper longeron. It's as if the Static Port holes were drilled at the factory with the canoe upside down and the plans were misread. I have done 3 and 4 leg GPS runs and my indicated TAS is about 4 MPH fast, but I haven't done anything yet to fix that.




Correct vertical location is 4" DOWN from the upper longeron:



My previous QB RV-8 has the Static Ports in the correct vertical and longitudinal location.
I am 99% sure that the QB assembly facility has never installed static ports so I am pretty sure that mistake was done by the builder.

For the OP, there is a lot of data that indicates that the actual static port that gets installed is far more important than which of the two bulkheads it is coincident too.

A flush static port like was being sold by a couple of the custom parts vendors a few years ago is a guaranty of static errors and instrumentation problems.
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Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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