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davidjoyce(at)doctors.org
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 Posted: Wed Jan 24, 2018 12:42 pm Post subject: Heated pitot |
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A year or so ago I remember reading someone's account of designing his own heated pitot tube using only v. modest amounts of electricity. I thought I had carefully filed the article but cannot find it. Does anyone have the details or know what progress has been made?
Regards, David Joyce, GXSDJ
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paul.the.aviator(at)gmail
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| Posted: Wed Jan 24, 2018 1:46 pm Post subject: Heated pitot |
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I downloaded this document written by Eric M. Jones describing a low energy heated pitot tube. It was on my "to do" list but I never got around to it.
On Wed, Jan 24, 2018 at 2:41 PM, <davidjoyce(at)doctors.org.uk (davidjoyce(at)doctors.org.uk)> wrote:
| Quote: |
Â
A year or so ago I remember reading someone's account of designing his own heated pitot tube using only v. modest amounts of electricity. I thought I had carefully filed the article but cannot find it. Does anyone have the details or know what progress has been made?Â
Regards, David Joyce, GXSDJ Â
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thermopitot.pdf |
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davidjoyce(at)doctors.org
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| Posted: Wed Jan 24, 2018 3:24 pm Post subject: Heated pitot |
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Paul, Many thanks but I seem to have only got a picture with no text. Regards, David
On 2018-01-24 21:46, Paul McAllister wrote: | Quote: | I downloaded this document written by Eric M. Jones describing a low energy heated pitot tube. It was on my "to do" list but I never got around to it.
On Wed, Jan 24, 2018 at 2:41 PM, <davidjoyce(at)doctors.org.uk (davidjoyce(at)doctors.org.uk)> wrote: | Quote: |
A year or so ago I remember reading someone's account of designing his own heated pitot tube using only v. modest amounts of electricity. I thought I had carefully filed the article but cannot find it. Does anyone have the details or know what progress has been made?
Regards, David Joyce, GXSDJ
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budyerly(at)msn.com
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| Posted: Wed Jan 24, 2018 7:29 pm Post subject: Heated pitot |
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Paul,
I really like and use Eric’s stuff!
I last talked to Eric about 6 years ago, he hasn’t finished his pitot heater. It was self regulating by use of the PTCs and he never finished as there were some issues. The FAA test is to freeze water in the pitot at 40 below and see if the heat clears it within some short time set by the Feds. He and I talked about it, I felt it would be worth it for those light snow and drizzle days, but I don’t fly in that anymore so I dropped the idea also.
All the 7-10 amp ones (Dynon/Gretz etc.) in Aircraft Spruce for experimentals work OK. Just 7 amps! I’ve installed three. They do have a PTC type circuit to limit the amps to what is required so they are somewhat reasonable to install. I would recommend a second alternator though.
Regards,
Bud Yerly
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
________________________________
From: owner-europa-list-server(at)matronics.com <owner-europa-list-server(at)matronics.com> on behalf of Paul McAllister <paul.the.aviator(at)gmail.com>
Sent: Wednesday, January 24, 2018 4:46:27 PM
To: europa-list(at)matronics.com
Subject: Re: Heated pitot
I downloaded this document written by Eric M. Jones describing a low energy heated pitot tube. It was on my "to do" list but I never got around to it
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Nigel Graham
Joined: 23 Mar 2017
Posts: 36
Location: Winchester - UK
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| Posted: Thu Jan 25, 2018 3:39 am Post subject: Re: Heated pitot |
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| davidjoyce(at)doctors.org wrote: | A year or so ago I remember reading someone's account of designing his own heated pitot tube using only v. modest amounts of electricity. I thought I had carefully filed the article but cannot find it. Does anyone have the details or know what progress has been made?
Regards, David Joyce, GXSDJ |
David, Attached is the article I think you're referring to.
Nigel
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Heated Pitot Design.pdf |
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graeme bird
Joined: 15 Jul 2010
Posts: 434
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| Posted: Thu Jan 25, 2018 9:08 am Post subject: Re: Heated pitot |
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I have a design based on the standard tube. It's proportional with a max of 1.6 amps. I put the mod 2 form in and made a prototype. Laa said I'd need to prove that it didn't affect the airspeed readings etc. It uses a nichrome wire wound on kapton sleeved in glass fibre needs 4 wires to the control circuit ( under pilot seat)
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_________________
Graeme Bird
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