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How Hot Does Pitot  
User currently offlineChopper From United Kingdom, joined Aug 2005, 0 posts, RR: 0
Posted (13 years 11 months 1 day 8 hours ago) and read 2412 times:

tube get on the airliner jets

21 replies: All unread, jump to last
 
User currently offlineIainhol From , joined Dec 1969, posts, RR:
Reply 1, posted (13 years 11 months 1 day 8 hours ago) and read 2298 times:

Probably not hot at all considering it is up at 30,000 and has a wind chill factor.
If you fly throw clouds (in a small aircraft I am not sure with a jet) you have to turn on your pito heat to stop water going in it and freezing, so I guess most of the time you fly it is below 0.
Iain


User currently offlineChopper From United Kingdom, joined Aug 2005, 0 posts, RR: 0
Reply 2, posted (13 years 11 months 1 day 8 hours ago) and read 2273 times:

NO THESE JETS I BEEN WORKING ON LOOK LIKE THEY GET REALY HOT LOOKS LIKE ITS ALMOST BURNT

User currently offlineJETPILOT From United States of America, joined May 1999, 3130 posts, RR: 29
Reply 3, posted (13 years 11 months 1 day 7 hours ago) and read 2278 times:

If I remeber correctly the number of 180 degees F comes to mind.

JET


User currently offlineFDXmech From United States of America, joined Mar 2000, 3251 posts, RR: 34
Reply 4, posted (13 years 11 months 1 day 6 hours ago) and read 2259 times:

Let me tell you a story, amazingly stupid but true.
One day when I was working for Continental EWR, I was assigned a job of replacing an angle of attack probe on an A300B4. This wasn't the type that looks like a moveable vane but resembles (for lack of a better description) a cigar probe sticking out of the forward fuselage.

Before removing this probe, I pulled the heater circuit breakers as was standard practice. Well, as can be expected the probe mount had several stripped out screws. I left the aircraft and went back to the hangar to get a drill and extraction tools to remove the bad screws. I returned to the airplane and got on the manlift to continue the job, unbeknownst to me, when I left, power was reapplied to the heater circuit for troubleshooting by someone else. I grabbed the probe and holy mackerel, all I saw was white in front of my eyes, it was so shockingly painful. My right hand received a 2nd degree burn in the image of the probe. I rushed back to the hangar and my lead stuck my hand in a bucket of freezing water and ice he got off an airplane. Whenever I took my hand out of the bucket, the pain would be excruciating. I was taken to the airport infirmary where my hand was treated. The kicker was with my poor aching hand I had to take a urine test.



You're only as good as your last departure.
User currently offlineL_188 From , joined Dec 1969, posts, RR:
Reply 5, posted (13 years 11 months 1 day 1 hour ago) and read 2221 times:

Pitot Heat Ramp story......

I guess that down in some states they have this bug called the Muddauber. Anyway these thing like building nests out of mud in tiny spaces. Like that little hole that is in the middle of a pitot tube. Anyway a lot of guys have the habit of blowing into that hole to check and see if that tube is plugged. Mechanics cringe at this practice of course. It isn't good for the gauges.

Anyway this guy was doing his walkaround and started inside the cabin. Anyway it was his habit to turn the breaker for the pitot heat off at this point and then do his outside walkaround, including blowing on the pitot tube. Well on this day he forgot to pull the breaker.

He reported had these two neat little half moon blisters on his lips for a coupe of days. One on each lip.


User currently offlineFeret From , joined Dec 1969, posts, RR:
Reply 6, posted (13 years 11 months 1 day ago) and read 2219 times:

It can burn your skin! The B767, for example, has lower heat on the ground than in flight, determined by the air/ground sensing system.
Many years ago I accidently grabbed a F86 pitot head while checking it for heat as I was about to put the cover on. I ended up with very bad burns as my hand stuck to it. Never again!!!


User currently offlineNKP S2 From United States of America, joined Dec 1999, 1714 posts, RR: 5
Reply 7, posted (13 years 11 months 20 hours ago) and read 2198 times:

Talk about a small world! Same thing happened to me but with the AOA vane in the PE/BA days...you may remember this. I was R&R-ing a 737 windshield in hangar 14... Outside on a none-too-steady BA ladder torqueing the screws. I lost my balance and freaked out...and grabbed ANYthing just to steady myself...Grabbed the AOA vane and smelled my own burning flesh and then felt the intense pain and saw the white mark. I might have been working with you, but I don't remember. Anyway, sorry to hear of your incident at Frank's place. Take care, Tom

User currently offlineXFSUgimpLB41X From United States of America, joined Aug 2000, 4229 posts, RR: 37
Reply 8, posted (13 years 11 months 18 hours ago) and read 2181 times:

Chopper: if the pitot heat isnt turned on that thing will get very very cold....if the pitot heat is on..very very hot.


Chicks dig winglets.
User currently offlineAvmechgirl From , joined Dec 1969, posts, RR:
Reply 9, posted (13 years 11 months 16 hours ago) and read 2185 times:

It gets hot enough to if a human hand touches it, you'll be having the worst degree of burns there are! I've seen guys have inprints in their hand for life from touching it. It has to get warm enough to prevent ice from building up on it seeing as three of the major flight insturments are connected to it, the air speed indicator, the Altimeter. and the vertical speed indicator.
If you have a false reading on those due to ice or no reading at all, you're bumming big time


User currently offlineCrjmech From United States of America, joined Jun 2000, 260 posts, RR: 1
Reply 10, posted (13 years 11 months 6 hours ago) and read 2161 times:

All the pitot tubes, static ports, AOA vanes, etc. I've ever dealt with get hot enough to cause burns almost instantly. On the CRJ, all the heated items are cold provided the aircraft is weight-on-wheels, neither of the engines are running (with IDGs on-line), and the heat switches are off. The exception are the ice detectors located on both sides of the forward fuselage. The detectors work by vibrating at a set frequency. Ice build-up changes the frequency and is sensed by the detector which triggers an ice warning in the cockpit and heats the ice detector. This is regardless of the aircraft's configuration; so long as the plane is powered-up, the detectors are active. Many a new mechanic has been burnt after grabbing an ice detector, puzzled by it's function. They get very, very hot very, very quickly.


Thou shalt mind thine altitude,lest the ground reach up and smite thee.
User currently offlineOldman From United States of America, joined Sep 2006, 0 posts, RR: 0
Reply 11, posted (13 years 11 months 1 hour ago) and read 2148 times:

This is directed to the first reply Mr. Ihinhol

Why do you "puke" out your opinions when you do not know of what you speak? This reply only serves to polute the the text and show how uninformed you are? Think before jumping in son!


User currently offlineCdfMXTech From United States of America, joined Jul 2000, 1341 posts, RR: 26
Reply 12, posted (13 years 10 months 4 weeks 1 day 3 hours ago) and read 2121 times:

Let's just say this.
Touch one on the ground and you can rob a couple of banks and not get caught because of a fingerprint!!


User currently offlineWilcharl From United States of America, joined Jun 2000, 1168 posts, RR: 3
Reply 13, posted (13 years 10 months 4 weeks 1 day ago) and read 2119 times:

does the static port not get as hot or am I just not senstive to heat? ive touched them and not gotten burnt, just warmed

User currently offlineMe From United States of America, joined Oct 2000, 220 posts, RR: 2
Reply 14, posted (13 years 10 months 4 weeks 6 hours ago) and read 2120 times:

This is very embarrassing, but I don't know any of you so I'll tell the story.

I was a flight instructor at a tiny little general aviation airport right out of college in '93. A student of mine had his private pilot checkride scheduled at 9am at an airport about 25miles north of where the flight school was based. We met at the flight school at 7:30, he did the preflight and soon we were rolling down the runway in our C172 on our way to meet the FAA examiner.

On the takeoff roll, we never got an airspeed indication. I aborted the takeoff, had him taxi off the runway and into the runup area. "Must be some ice in the pitot tube" I said as he shut down the engine, "I'll be right back". I got out of the Cessna and very gently blew into the pitot tube. BIG MISTAKE!!

In the 3-4 minns that the pitot heat was on, the pitot tube got very hot, super hot. I was burnt pretty bad, picking up snow and pressing it against my lips. The good news was I cleared the pitot tube and the airspeed indicator worked fine. The bad news was I quickly developed two HUGE blisters, one on each lip.

I had a hard time explaining to people, who know nothing about airplanes or pitot tubes, what I did.
 Wow!

P.S. My student passes his ride with flying colors.



User currently offlineWilcharl From United States of America, joined Jun 2000, 1168 posts, RR: 3
Reply 15, posted (13 years 10 months 4 weeks 6 hours ago) and read 2096 times:

Now I dont feel so stupid for drinking the skydrol

User currently offlineNKP S2 From United States of America, joined Dec 1999, 1714 posts, RR: 5
Reply 16, posted (13 years 10 months 4 weeks 3 hours ago) and read 2082 times:

Using ones lungs as a pitot/static test set...That's a good one Smile Wonder how many knots a good exhale is good for?

User currently offlineJETPILOT From United States of America, joined May 1999, 3130 posts, RR: 29
Reply 17, posted (13 years 10 months 4 weeks 3 hours ago) and read 2072 times:

LOL

I hope you didn't drink Skydrol....Did you? That would answer many questions.  Smile/happy/getting dizzy

JET


User currently offlineCrjmech From United States of America, joined Jun 2000, 260 posts, RR: 1
Reply 18, posted (13 years 10 months 4 weeks 2 hours ago) and read 2068 times:

While I haven't actually ingested Skydrol, I did get a pretty good a taste of it once. It seems that while replacing some hydraulic widget I got some on my mini Maglite. Later on said flashlight ended up in my mouth. It tastes rather like that super-hot habenero pepper sauce. Not as spicy, but it stays with you for hours. Happily, my lips and tounge remained intact.


Thou shalt mind thine altitude,lest the ground reach up and smite thee.
User currently offlineChopper From United Kingdom, joined Aug 2005, 0 posts, RR: 0
Reply 19, posted (13 years 10 months 4 weeks ago) and read 2061 times:

Thanks for the stories everyone . maybe this will keep me from touching pitot tubes before checking.

User currently offlineRyaneverest From , joined Dec 1969, posts, RR:
Reply 20, posted (13 years 10 months 3 weeks 6 days 22 hours ago) and read 2056 times:

NKP_S2 - a human sneeze is measured at 60 knots. Big grin

I think the respiratory tract warming system works somehow like the Pitot heat system?


User currently offlineHeavyCapt From United States of America, joined Jan 2001, 62 posts, RR: 0
Reply 21, posted (13 years 10 months 3 weeks 5 days 15 hours ago) and read 2034 times:

Hot enough to cause 2nd degree burns by momentarily touching it and 3rd degree burns if you actually "grab" it. That folks......I learned the hard way

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