|
-
POSTING RULES

-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|

03-31-2012, 02:04 AM
|
|
|
|
Join Date: Sep 2010
Location: Houston Texas
Posts: 83
|
|
Dynon pitot/AOA question
hi everyone,
i am installing the dynon heated pitot/aoa in my rv7a. Just 1 question, what screw size do we use to attach the mounting bracket to the pitot tube? #6 or #8? the gretz install instruction specifies to install the screws that came with pitot tube. i either did not get these or lost them when i opened the package. also do we use AN515 screws, round head or the countersunk AN509???
thank you.
omar
|

03-31-2012, 03:35 AM
|
|
|
|
Join Date: Feb 2006
Location: San Diego, CA, U.S.A.
Posts: 770
|
|
The answer is in the instructions from Dynon
The Dynon tube doesn't come with screws. It doesn't even come with screw holes. You have to drill and tap them yourself. The installation instructions from Dynon recommend #6-32. This document also has other guidance and cautionary notes, so I highly recommend reading it thoroughly before you start drilling.
|

04-05-2012, 08:00 AM
|
|
|
|
Join Date: Jan 2011
Location: Cumming, Georgia
Posts: 873
|
|
I also used #6 screws but had to shorten them up as they were a little long and I did not want them to hit the actual tubing inside which are in that semi-hard silicon material
I then shaped the heads and numbered the screws so to match the contour of the blue aluminum tube
Smilin Jack
__________________
Smilin' Jack & Anita Hunt
N507H RV7, KJZP Jasper, GA
EAA690
APRS/ WB4JKY
Retired Corporate Pilot CFI-AI, MEL
CE500, LRJT, HS25, C650, SBJT, CL60
Hunt Aviation, LLC.
Pilot Service, IPC's Biennials.
Comm Glider
Last edited by Smilin' Jack : 04-05-2012 at 08:01 AM.
Reason: Spelling
|

04-05-2012, 01:04 PM
|
 |
|
|
Join Date: Mar 2008
Location: Ramona, CA
Posts: 2,370
|
|
Here is what mine looks like.

Drilled 4 holes, tapped them and used button head screws. Countersinking would be difficult on the rounded surface of the mount. Not to say that it isn't possible to mount the pitot with flush screws, but I chose not to.
|

04-10-2012, 01:34 AM
|
|
|
|
Join Date: Sep 2010
Location: Houston Texas
Posts: 83
|
|
8-32
unfortunately i screwed up the tap and ended up with a #8 screw that i have to use. i also shortened the head screws because i only had the 8-32 1/2. i hope this will work. thanks for all your replies.
|

05-04-2012, 07:26 AM
|
|
|
|
Join Date: Oct 2005
Location: Arnprior Ontario
Posts: 26
|
|
screws for Dynon Pitot/AOA
Used #6-32 stainless countersunk screws and they worked out well. Had to cut them as well so they would not damage tubes. Take care when drilling.
__________________
Mike Asselin
RV 7A - finish kit,
Arnprior, Ontario
Canada
|

05-11-2012, 09:38 AM
|
 |
|
|
Join Date: Dec 2011
Location: Kirkland, WA
Posts: 886
|
|
I assume folks are machine countersinking when using countersunk screws? I imagine the mast wall is too thick to dimple. Plus, dimpling on the curved surface could have undesirable results.
Thanks,
Russ
|

09-20-2012, 12:15 PM
|
|
|
|
Join Date: Dec 2010
Location: Germany, Bavaria
Posts: 5
|
|
Hello,
could you please tell me the order number of the gretz pitot bracket for the dynon pitot tube?
Is the PBK-12 or the PBK-ND (non-drilled) the right one?
Many thanks...
cb
|

09-20-2012, 03:11 PM
|
 |
|
|
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
|
|
Interestingly, if you want to duplicate the mounting of the AN5812 pitot tube you should use fine thread 6-40 screws.
You could also copy the mounting hole locations from the certified part. They make a good recommended starting point.
http://spaceagecontrol.com/AN5812.pdf
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 08:46 AM.
|