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bob88
Joined: 24 Feb 2013
Posts: 99
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 Posted: Tue Aug 26, 2014 5:15 pm Post subject: Pitot location |
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Where to install pitot mast? Vans has a hole in the forward bottom skin just in front of the spar in line with the aileron actuator bracket. given a quickbuild wing with this skin already riveted in place and planning to install a real pitot tube on a standard mast mount, where is best location? I think it will have to be somewhere on the outboard bottom skin? Also, the sequence seems to be installation of the outboard bottom skin before the aileron actuator parts. Is there a reason for this? Seems it would be easier to get that done before closing up the skin.
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bwestfall
Joined: 22 Oct 2008
Posts: 131
Location: Portland, OR
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flying-nut(at)cfl.rr.com
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| Posted: Tue Aug 26, 2014 6:46 pm Post subject: Pitot location |
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I put mine in the next bay outboard of the aileron bracket. Made my own mast .... because I could. I haven't riveted the bottom panel yet but you can work through the inspection panel. I used the Van's pitot (the hole below the bracket) with a 45 fitting for my AOA.
Linn .... final sanding the windshield fairing
[img]cid:part1.04090906.02050006(at)cfl.rr.com[/img]
[img]cid:part2.03030808.08020807(at)cfl.rr.com[/img]
On 8/26/2014 9:15 PM, bob88 wrote:
| Quote: | | Quote: | --> RV10-List message posted by: "bob88" <marty.crooks(at)comcast.net> (marty.crooks(at)comcast.net)
Where to install pitot mast? Vans has a hole in the forward bottom skin just in front of the spar in line with the aileron actuator bracket. given a quickbuild wing with this skin already riveted in place and planning to install a real pitot tube on a standard mast mount, where is best location? I think it will have to be somewhere on the outboard bottom skin? Also, the sequence seems to be installation of the outboard bottom skin before the aileron actuator parts. Is there a reason for this? Seems it would be easier to get that done before closing up the skin.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=429407#429407
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rv10flyer(at)live.com
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| Posted: Tue Aug 26, 2014 9:00 pm Post subject: Pitot location |
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Pitot is about half way, pretty much where Linn has his, I didn’t rivet the
bottom skins until the end, pretty much when the skins where riveted
everything in the wing was installed and bolted down.I did have it clecoed
for the pitot install and fitting of tubes.
Pascal
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jmjones2000(at)mindspring
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| Posted: Tue Aug 26, 2014 10:07 pm Post subject: Pitot location |
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The most important thing to keep in mind in pitot location is to keep it outside of the propeller arc. You don't want to be measuring the speed of the air the propeller pushes.
On Aug 26, 2014, at 21:00, "Pascal" <rv10flyer(at)live.com> wrote:
[quote]
Pitot is about half way, pretty much where Linn has his, I didn’t rivet the bottom skins until the end, pretty much when the skins where riveted everything in the wing was installed and bolted down.I did have it clecoed for the pitot install and fitting of tubes.
Pascal
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Mauledriver(at)nc.rr.com
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| Posted: Wed Aug 27, 2014 6:42 am Post subject: Pitot location |
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I put my mast out in the last or next to last bay per some other
builders. I have the Gretz heated pitot and it has a little controller
that resides close to the mast so the last bay provides easy access via
the tip. No problems with the location.
The Gretz heated pitot, now handled by Angus Aviation in AUS, has been
great. Early units like mine appeared to have a defect causing self
destruction. Couldn't have been happier with Angus Aviation's response
and resolution despite the unit being 4+ years old before I first turned
it on. I recommend the unit highly after 3 years of use.
On 8/26/2014 9:15 PM, bob88 wrote:
| Quote: |
Where to install pitot mast? Vans has a hole in the forward bottom skin just in front of the spar in line with the aileron actuator bracket. given a quickbuild wing with this skin already riveted in place and planning to install a real pitot tube on a standard mast mount, where is best location? I think it will have to be somewhere on the outboard bottom skin? Also, the sequence seems to be installation of the outboard bottom skin before the aileron actuator parts. Is there a reason for this? Seems it would be easier to get that done before closing up the skin.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=429407#429407
-----
No virus found in this message.
Checked by AVG - www.avg.com
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woxofswa
Joined: 12 Aug 2008
Posts: 349
Location: AZ
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| Posted: Wed Aug 27, 2014 8:14 am Post subject: Re: Pitot location |
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I have the Gretz mount and mine is mounted one bay closer to the tip than where Van's has the access plate. I'm pretty sure, but haven't yet confirmed, that I put it where the Gretz instructions recommended.
Anyway, at OSH, I had one of the judges ask me "why did you move your pitot tube?" The question threw me for a loop and I didn't have a quick answer.
He responded, "it should work okay, but Van's design is for it to be in-board where the access cover is and yours is the first I've seen further out "
Sure enough, I looked at three -10's on the row behind me and theirs were all more inboard than mine. I felt kind of stupid like I had made a silly mistake.
As the judge was leaving, I told him that having it where it was gave me more access to the connections with the tip off. He didn't seem impressed and said "that seems like more work than the designated access panel, but whatever, it should work okay."
I felt like a dope. Then for the rest of the show, I started looking at the pitot position of every 10 I could find and while the majority where in the inboard position, I did find 4 or 5 that had it exactly where I did. I told one fellow who had his where mine was about the judge's comments, and he said that he also had the Gretz mount and was sure that he mounted it exactly per the instructions.
On another judging note, I had one judge ask me if I had done the elevator SB. I told him the SB didn't apply to -10's, only the tailcone bulkhead SB that I complied with whilst building. He replied quite forcefully "oh yes it does, you need to look it up... Every other 10 builder I've asked said he's done it".
I didn't feel like arguing with him so I just said that I would research it.
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_________________
Myron Nelson
Mesa, AZ
Flew May 10 2014 |
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rv10flyer
Joined: 25 Aug 2009
Posts: 364
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| Posted: Wed Aug 27, 2014 9:04 am Post subject: Re: Pitot location |
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My Falcon heated pitot is in the second bay in, 6" below the wing. I think I used acid-etch primer in an aerosol can and prosealed the joint to prevent water from entering. Standard Van's FAB and engine install, ran slightly LOP. Full gross weight on most flights and 1" forward of aft limit. 24 months/2100 hrs to complete build.
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Wayne G. |
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flying-nut(at)cfl.rr.com
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| Posted: Wed Aug 27, 2014 10:36 am Post subject: Pitot location |
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Never feel like a dope. No matter what changes you make, you gave it a lot of thought and came to a rational decision. Yeah, the judge was right .... less screws in the inspection panel, but how often do you look at it? At least you'll look at it every condition inspection. I plan on using hinge to attach my tips.
Linn
On 8/27/2014 12:14 PM, woxofswa wrote:
[quote] | Quote: | --> RV10-List message posted by: "woxofswa" <woxof(at)aol.com> (woxof(at)aol.com)
I have the Gretz mount and mine is mounted one bay closer to the tip than where Van's has the access plate. I'm pretty sure, but haven't yet confirmed, that input it where the Gretz instructions recommended.
Anyway, at OSH, I had one of the judges ask me "why did you move your pitot tube?" The question threw me for a loop and I didn't have a quick answer.
He responded, "it should work okay, but Van's design is for it to be in-board where the access cover is and yours is the first I've seen further out "
Sure enough, I looked at three -10's on the row behind me and theirs were all more inboard than mine. I felt kind of stupid like I had made a silly mistake.
As the judge was leaving, I told him that having it where it was gave me more access to the connections with the tip off. He didn't seem impressed and said "that seems like more work than the designated access panel, but whatever, it should work okay."
I felt like a dope. Then for the rest of the show, I started looking at the pitot position of every 10 I could find and while the majority where in the inboard position, I did find 4 or 5 that had it exactly where I did. I told one fellow who had his where mine was about the judge's comments, and he said that he also had the Gretz mount and was sure that he mounted it exactly per the instructions.
--------
Myron Nelson
Mesa, AZ
Flew May 10 2014
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=429462#429462
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No virus found in this message.
Checked by AVG - www.avg.com
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[b]
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