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01-20-2020, 05:52 PM
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Join Date: Jan 2005
Posts: 959
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Quote:
Originally Posted by gmcjetpilot
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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.
Last edited by RV8JD : 01-20-2020 at 05:57 PM.
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01-20-2020, 06:19 PM
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Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 561
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Quote:
Originally Posted by bjdecker
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.
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No...don't do this...the skin is structural. Follow 43:13 to make a patch.
__________________
Michael Fleming
Joseph, OR
sagriver at icloud dot com
RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016 (sans fiberglass)
Ailerons and flaps completed 3/2017.
Wings completed 12/2017
Started on QB fuselage 01/2018
Donated for 2020 and so should you
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01-20-2020, 07:03 PM
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Join Date: Nov 2012
Location: Ok
Posts: 94
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Hole
Just put in a 1097 #10 rivit.
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01-20-2020, 07:29 PM
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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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01-20-2020, 07:32 PM
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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.
__________________
Jake
RV6 #20477 completed 1991 sold.
RV7 #72018 N767T first flight 11/21/2017 350+ hrs.
IO-360M1B MT 3 blade, Dual AFS 5600 QUICK Panel.
Manual Flaps. (KOXC)Oxford, CT, (0NY0)North Creek, NY.
1941 J3 Cub skis,floats.
2020 dues gladly paid.
Last edited by Jpm757 : 01-20-2020 at 07:34 PM.
Reason: Edit
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01-20-2020, 08:10 PM
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Join Date: Jan 2005
Location: Hopkinsville, KY
Posts: 957
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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.

__________________
Bobby Hester - Builder/Pilot/A&P
Surfing the web from Hopkinsville, KY
N857BH RV7A XP-O360 - Garmin G3X ADS-B IN/OUT 2020 Compliant
Web site: http://www.newtech.com/bobbyhester/RVSite.htm
Dec. 2019 VAF donator - alot better than any magazine subscription
Last edited by bhester : 01-20-2020 at 08:15 PM.
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01-20-2020, 08:49 PM
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Join Date: Nov 2015
Location: Osage, IA
Posts: 142
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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
__________________
RV7 QB started 1/17
Working on FWF
2020 dues sent
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01-20-2020, 09:49 PM
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Join Date: Jan 2005
Posts: 959
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Quote:
Originally Posted by burtj
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
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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.
Last edited by RV8JD : 01-20-2020 at 10:12 PM.
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01-21-2020, 12:21 AM
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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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01-21-2020, 08:13 AM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by RV8JD
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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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.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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