 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
tonyvaccarella
Joined: 10 Sep 2014
Posts: 68
Location: Australia
|
 Posted: Mon Sep 04, 2017 9:24 pm Post subject: Alignment of pitot tube |
 |
|
Hi all,
Im installing a heated pitot tube on my Classic wing. Im trying to determine how I should align the tube to the airflow. I would have assumed that the pitot tube be pointing directly into the airflow but since the wings have a 2.5 deg angle of incidence, I would need to make allowance for that when installing it.
Ive been advised by other sources that the pitot tube should be aligned to the chord of the wing.
Your advice would be greatly appreciated.
Cheers
Tony
S/N A011
| | - The Matronics Europa-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?Europa-List |
|
_________________
Tony Vaccarella
Mascot NSW 2020
Sydney Australia |
|
| Back to top |
|
 |
davidjoyce(at)doctors.org
Guest
|
| Posted: Tue Sep 05, 2017 12:03 am Post subject: Alignment of pitot tube |
|
|
Tony, Presumably you are replacing a standard Europa non heated one, which has served you up to this point. Why not simply use the same orientation?
Regards, David Joyce, GXSDJ
On 2017-09-05 06:24, tonyvaccarella wrote: | Quote: | | Quote: | --> Europa-List message posted by: "tonyvaccarella" <tony(at)weimagine.com.au (tony(at)weimagine.com.au)>
Hi all,
Im installing a heated pitot tube on my Classic wing. Im trying to determine how I should align the tube to the airflow. I would have assumed that the pitot tube be pointing directly into the airflow but since the wings have a 2.5 deg angle of incidence, I would need to make allowance for that when installing it.
Ive been advised by other sources that the pitot tube should be aligned to the chord of the wing.
Your advice would be greatly appreciated.
Cheers
Tony
S/N A011
--------
Tony Vaccarella
Mascot NSW 2020
Sydney Australia
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=472500#472500
ttp://www.matronics.com/Navigator?Europa-List
ics.com
.com
.matronics.com/contribution
|
|
| | - The Matronics Europa-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?Europa-List |
|
|
|
| Back to top |
|
|
tonyvaccarella
Joined: 10 Sep 2014
Posts: 68
Location: Australia
|
| Posted: Tue Sep 05, 2017 1:40 pm Post subject: Re: Alignment of pitot tube |
|
|
Thanks David,
This is the initial installation as the aircraft has not flown yet. The way I see it I could make the pitot tube parallel to:
1) the Chord Line
2) the bottom wing (not sure if they are the same) or
3) the flight path
Am I overthinking this?
Many thanks
Tony
| | - The Matronics Europa-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?Europa-List |
|
_________________
Tony Vaccarella
Mascot NSW 2020
Sydney Australia |
|
| Back to top |
|
|
davidjoyce(at)doctors.org
Guest
|
| Posted: Wed Sep 06, 2017 12:33 am Post subject: Alignment of pitot tube |
|
|
Tony, I suspect you just might be overthinking it. I would expect the dynamic pressure on the pitot tube to relate to the cos of the angle to the air flow and cosines of small angles are very close to one - hence for instance minor angular deviations from a direct line route make very little difference to total distance travelled. In fact cos 85 degrees is 0.9962, so 5 degrees off straight gives less than 0.4% difference, barely perceptible in our speed range. would place it where the manual suggests (or possibly where the premoulded position is on the XS wing if you have access to one) and then angle the tube parallel to the underwing surface there as airflow is bound to be close to parallelto the surface locally. I suspect that its position on the wing is more important than the precise pitch angle but you could assume the Europa recommended position is best as long as your pitot is not significantly shorter or longer than the standard one.
Regards, David Joyce, G-XSDJ
On 2017-09-05 22:40, tonyvaccarella wrote:
| | - The Matronics Europa-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?Europa-List |
|
|
|
| Back to top |
|
|
kaarsberg(at)terra.com.br
Guest
|
| Posted: Wed Sep 06, 2017 9:43 am Post subject: Alignment of pitot tube |
|
|
Tony,
I'd expect it should have to be parallel to the airflow in cruise attitude, not that a few degrees would make much difference...
Regards,
Alex Kaarsberg
| Quote: | On 5 Sep 2017, at 07:24, tonyvaccarella <tony(at)weimagine.com.au> wrote:
Hi all,
Im installing a heated pitot tube on my Classic wing. Im trying to determine how I should align the tube to the airflow. I would have assumed that the pitot tube be pointing directly into the airflow but since the wings have a 2.5 deg angle of incidence, I would need to make allowance for that when installing it.
Ive been advised by other sources that the pitot tube should be aligned to the chord of the wing.
Your advice would be greatly appreciated.
Cheers
Tony
S/N A011
--------
Tony Vaccarella
Mascot NSW 2020
Sydney Australia
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=472500#472500
|
| | - The Matronics Europa-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?Europa-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
