 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
brinker(at)cox-internet.c
Guest
|
 Posted: Sun Mar 05, 2006 2:59 pm Post subject: Heated Pitot test |
 |
|
I bought a used 12v heated pitot removed from a Piper Seminole off
of ebay claimed to be servicable and tested. I have never hooked up one of
these. It has two terminals to hook up wires. But accually has 2 wires now
soldered to one terminal and one wire soldered to the second terminal but
appears a second wire was at one time soldered to the second terminal.
The only verifiable markings are a "p" and an "s" I believe designate
which tube is the pitot and static ports. But no marking for positive or
negitive.
I will not be installing this for a while since I have a ways to go
on building my plane but wish to at least test it before storing it for
later.
Randy
| | - The Matronics AeroElectric-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?AeroElectric-List |
|
|
|
| Back to top |
|
 |
brian
Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA
|
| Posted: Sun Mar 05, 2006 3:28 pm Post subject: Heated Pitot test |
|
|
Brinker wrote:
| Quote: |
I bought a used 12v heated pitot removed from a Piper Seminole off
of ebay claimed to be servicable and tested. I have never hooked up one of
these. It has two terminals to hook up wires. But accually has 2 wires now
soldered to one terminal and one wire soldered to the second terminal but
appears a second wire was at one time soldered to the second terminal.
The only verifiable markings are a "p" and an "s" I believe designate
which tube is the pitot and static ports. But no marking for positive or
negitive.
I will not be installing this for a while since I have a ways to go
on building my plane but wish to at least test it before storing it for
later.
|
Since the heating element is a resistor, there is no polarity. If it was
designed to work on either 12V or 24V there will be two elements. Use
them in series for 24V and in parallel for 12V.
And the latter is just a guess on my part.
--
Brian Lloyd 361 Catterline Way
brian-yak at lloyd dot com Folsom, CA 95630
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery
| | - The Matronics AeroElectric-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?AeroElectric-List |
|
_________________
Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery |
|
| Back to top |
|
|
chaztuna(at)adelphia.net
Guest
|
| Posted: Sun Mar 05, 2006 8:02 pm Post subject: Heated Pitot test |
|
|
Randy,
There are two heating elements in the Piper style heated pitot
tube. One is a 70 watt unit, the other is 100 watts. I've seen the
wires of both heating elements crimped together before. Cut the wires
apart, so that you can insure that BOTH elements work. Check for
continuity between both wires of each element. I believe my pitot
elements ohm out at about 3 ohms. An infinite reading will be that
the element being tested is bad.
Connect each elements 2 wires to a 12 volt battery (check one
element at a time) using 16 or 14 AWG wire. The Pitot should start to
warm up in your hand within 30 to 60 seconds. Do not apply power for
a period of time longer than is needed to verify that each element works.
If you have a bad element, they can be replaced. A number of
outfits will charge you a hefty price for these parts. RV-9A builder
Peter Laurence tracked down the "source" for these units. They are
available for a reasonable price from HotWatt. See Peter's email to
me below for more info.
Charlie Kuss
Charlie,
Here is the info. Heaters are made by
Hotwatt Http://www.hotwatt.com/cartridg.htm
Hotwatt part #s
For Pitot: 13A7025 70 W 12V
Static 13A7026 100W 14V
Piper part #s
464-356 for the 70W 12V
464-357 for the 100W 14V
These are called cartridge heaters. They are 3"X 3/16" and 4"X 3/16"
Check the ceramic plug where the wire enters the cartridge. If
there's any movement of the wire, it should be replaced.
Peter Laurence
| Quote: |
I bought a used 12v heated pitot removed from a Piper Seminole off
of ebay claimed to be servicable and tested. I have never hooked up one of
these. It has two terminals to hook up wires. But accually has 2 wires now
soldered to one terminal and one wire soldered to the second terminal but
appears a second wire was at one time soldered to the second terminal.
The only verifiable markings are a "p" and an "s" I believe designate
which tube is the pitot and static ports. But no marking for positive or
negitive.
I will not be installing this for a while since I have a ways to go
on building my plane but wish to at least test it before storing it for
later.
Randy
|
| | - The Matronics AeroElectric-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?AeroElectric-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
