25 May 2025, 09:03 [ UTC - 5; DST ]
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Username Protected
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Post subject: Re: How hot are bizjet pitot tubes?  Posted: 29 May 2019, 10:15 |
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Joined: 12/04/09
Posts: 354
Post Likes: +149
Aircraft: Dakota
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Username Protected wrote: how hot do these get??? "Meat-Leaving Hot" 
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Username Protected
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Post subject: Re: How hot are bizjet pitot tubes? Posted: 29 May 2019, 10:25 |
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Joined: 12/03/14
Posts: 20087
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Company: Ciholas, Inc
Location: KEHR
Aircraft: C560V
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Username Protected wrote: how hot do these get??? Very, at 0 KIAS. Heating element can be > 100 watts. It has to reach well over freezing in -30 C air going 300 knots. You could build it with a thermostat to limit the high temperature, but that's another thing to fail. Mike C.
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Email mikec (at) ciholas.com
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Username Protected
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Post subject: Re: How hot are bizjet pitot tubes? Posted: 29 May 2019, 12:55 |
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Joined: 10/07/18
Posts: 3287
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Company: Retired
Location: Columbus, Ohio
Aircraft: Baron 58, Lear 35
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Username Protected wrote: Wow, chrome turns blue about 1000F. Think motorcycle exhausts...
--paul The type I work around (Lear) aren’t chrome. They’re a dull light brown color. The bluing is from leaving them on too long on the ground.
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Post subject: Re: How hot are bizjet pitot tubes? Posted: 29 May 2019, 12:56 |
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Joined: 10/07/18
Posts: 3287
Post Likes: +2321
Company: Retired
Location: Columbus, Ohio
Aircraft: Baron 58, Lear 35
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Username Protected wrote: Wow, chrome turns blue about 1000F. Think motorcycle exhausts...
--paul The type I work around (Lear) aren’t chrome. They’re a dull light brown color. The bluing is from leaving them on too long on the ground.
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Username Protected
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Post subject: Re: How hot are bizjet pitot tubes? Posted: 29 May 2019, 13:02 |
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Joined: 08/26/15
Posts: 9929
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Company: airlines (*CRJ,A320)
Location: Florida panhandle
Aircraft: Travel Air,T-6B,etc*
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Username Protected wrote: You could build it with a thermostat to limit the high temperature, but that's another thing to fail. Yep- some airplanes' heaters have a controller to do that for you (mostly for when you're on the ground). That tends to keep the pitot tubes at a temperature of approximately 2nd~ish degree burn (instead of an instant 3rd). 
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Post subject: Re: How hot are bizjet pitot tubes? Posted: 01 Jun 2019, 14:18 |
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Joined: 03/10/17
Posts: 86
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Aircraft: B35
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During troubleshooting on the Piper Meridian, I pointed the Chinese IR thermometer at the tubes on the ground and got 150 degrees f on both. I do not recall if the tubes get more current when the plane is in the air. If a failure occurs, they could possibly get high current on the ground, but normally a warning would be prudent.
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Post subject: Re: How hot are bizjet pitot tubes? Posted: 02 Jun 2019, 09:24 |
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Joined: 05/23/08
Posts: 6060
Post Likes: +709
Location: CMB7, Ottawa, Canada
Aircraft: TBM - C185 - T206
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TBMs pitots have a lower output when on the ground so they dont come too hot. Never replaced one in 1500 hrs. Username Protected wrote: You could build it with a thermostat to limit the high temperature, but that's another thing to fail. Yep- some airplanes' heaters have a controller to do that for you (mostly for when you're on the ground). That tends to keep the pitot tubes at a temperature of approximately 2nd~ish degree burn (instead of an instant 3rd).
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Former Baron 58 owner.
Pistons engines are for tractors.
Marc Bourdon
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Post subject: Re: How hot are bizjet pitot tubes? Posted: 02 Jun 2019, 09:35 |
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Joined: 08/26/15
Posts: 9929
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Company: airlines (*CRJ,A320)
Location: Florida panhandle
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Username Protected wrote: Turn that sucker on and hold my beer! 
Mark, don't touch the stove.
Mark, ..."
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Post subject: Re: How hot are bizjet pitot tubes? Posted: 02 Jun 2019, 09:42 |
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Joined: 05/29/13
Posts: 14300
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Company: Easy Ice, LLC
Location: Marquette, Michigan; Scottsdale, AZ, Telluride
Aircraft: C510,C185,C310,R66
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Username Protected wrote: Turn that sucker on and hold my beer!
Mark, don't touch the stove.
Mark, ..."
Agh...just don’t stand there! Pour my beer on my hand!
_________________
Mark Hangen
Deputy Minister of Ice (aka FlyingIceperson)
Power of the Turbine
"Jet Elite"
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Post subject: Re: How hot are bizjet pitot tubes? Posted: 13 Jun 2019, 13:10 |
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Joined: 04/26/13
Posts: 21649
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Location: Columbus , IN (KBAK)
Aircraft: 1968 Baron D55
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Username Protected wrote: The Multi-Function probes (like pitot/static probes, but with more holes for sensing AOA & sideslip in addition to static press) on our Gulfstreams are regulated to 150 deg C. They look almost exactly like the one pictured above (same manufacturer). We have 4 of those.
We turn them on after engine start & leave them on until after landing. That's why they're all purple. Unless there's freezing precip ours were always runway items.
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My last name rhymes with 'geese'.
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