REFLECTOR: I'm Pitot(ed) off

[Laurence Coen]

MessageYes, you heard it here!  The problem with the bow wave was with the 
static port.  I have a pitot static probe and the static ports are on the 
top and bottom.  The pitot function works fine but the static ports, which 
are closer to the nose, see pressure from the bow wave.  I abandoned the 
pitot mounted static ports and went to a static port on the side of the 
fuselage below the door.  When you think about it, the pressure created by 
forward facing things is what makes a pitot system work.

Larry Coen
N136LC
  ----- Original Message ----- 
  From: gpoole
  To: 'Velocity Aircraft Owners and Builders list'
  Sent: Friday, September 22, 2006 6:35 AM
  Subject: Re: REFLECTOR: I'm Pitot(ed) off


  ….. thought I read somewhere recently (…thought it was here!) that a 
problem found with the nose mounted pitot tubes in most homebuilt instances 
(probably why that military one is soooooo long!) is that they are not out 
of the pressure wave and give a false reading…..



  Greg Down-Under

  (warming up early here already and we’re not even past the Spring 
solstice!)



  -----Original Message-----
  From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On 
Behalf Of Al Gietzen
  Sent: Friday, 22 September 2006 2:09 PM
  To: 'Velocity Aircraft Owners and Builders list'
  Subject: Re: REFLECTOR: I'm Pitot(ed) off





  I just bought one of those on Ebay, too. How far should it stick out in 
front of the nose?



  Mine extends just so the bleed hole (water drain) on the bottom is 
exposed.



  Al



  Doug Holub

    ----- Original Message ----- 

    From: Keith Hallsten

    To: 'Velocity Aircraft Owners and Builders list'

    Sent: Thursday, September 21, 2006 8:58 PM

    Subject: Re: REFLECTOR: I'm Pitot(ed) off



    I have the same one mounted on the pointy nose of my XL project.  I 
bought it as “new, old stock” on E-bay for $75.  It came in the original 
manufacturer’s packaging – it was manufactured in May 1961!!!  I have every 
intention of avoiding visible moisture and keeping to “VFR meteorological 
conditions” so I won’t cry if it doesn’t heat well or for too long.  It will 
certainly work as an unheated pitot!



    I got some high-temperature-rated thick wall phenolic tube and turned a 
mount for it, which then was glassed into the fuselage.  That way it won’t 
melt the nose off! J



    Keith Hallsten




----------------------------------------------------------------------------

    From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On 
Behalf Of Al Gietzen
    Sent: Thursday, September 21, 2006 5:30 PM
    To: 'Velocity Aircraft Owners and Builders list'
    Subject: Re: REFLECTOR: I'm Pitot(ed) off



    Chuck;



    I think you are looking for a AN 5813-1; 28 volt, heated.  That’s what I 
have in the nose of my plane.  I think when I bought mine it was $129.  AS&S 
now has it for $645.  I hope mine never goes bad.



    It works fine on 12V when it is mostly shrouded as it is in this 
installation.  Be sure to insulate from the fiberglass.



    Al





    Subject: REFLECTOR: I'm Pitot(ed) off



    As Little Richard would say, "help, help, help me"--too bad you can't 
hear the falsetto and waving hands!



    I'm looking for a 12v heated pitot that fits on the pointy-nose of an 
airplane....not a right angle type. Just a straight bayonet that mounts in 
the nose. I know they make 'em because I have one that's only about 3 years 
old (but now inoperable for reasons I'll not go into). I checked AS&S, Wicks 
and the usual suspects, but they don't seem to have what I'm looking 
for--all right angle jobs. Any leads or ideas?

    Chuck Jensen


----------------------------------------------------------------------------

    _______________________________________________
    To change your email address, visit 
http://www.tvbf.org/mailman/listinfo/reflector

    Visit the gallery!  www.tvbf.org/gallery
    user:pw     Check new archives: www.tvbf.org/pipermail
    Check old archives: http://www.tvbf.org/archives/velocity/maillist.html



  --
  No virus found in this incoming message.
  Checked by AVG Free Edition.
  Version: 7.1.405 / Virus Database: 268.12.7/454 - Release Date: 21/09/2006





  --
  No virus found in this outgoing message.
  Checked by AVG Free Edition.
  Version: 7.1.405 / Virus Database: 268.12.7/454 - Release Date: 21/09/2006




------------------------------------------------------------------------------


  _______________________________________________
  To change your email address, visit 
http://www.tvbf.org/mailman/listinfo/reflector

  Visit the gallery!  www.tvbf.org/gallery
  user:pw   Check new archives: www.tvbf.org/pipermail
  Check old archives: http://www.tvbf.org/archives/velocity/maillist.html 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.tvbf.org/mailman/private/reflector/attachments/20060922/cd3e2cf6/attachment.htm