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#21
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There was also an accident in a large turbojet aircraft (727?) years ago (as I
recall it was a freighter) where the crew forgot to turn on the pitot heat before takeoff. They were climbing when the pitot tubes iced up, and crew responded to the increasing indicated airspeed by pitching up more and more until they entered a stall/spin. Not good. Needless to say, the crew perished. I went to a (as in one) IFR ground class. The instructor was very good but I simply decided to do it on my own. Nevertheless the one thing i got out of the class was possibly the story above. He showed a clip on a south american passenger transport jet (type?) where they just repainted the plane and they left some kind of tape over the pitot tubes. I would hope a ATP pilot flying jets could at least figure out what is happening when they have a single point failure. Gerald |
#22
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I recently had a pitot/static system failure on climbout, and found it was
helpful to turn the Garmin 430 to crosscheck the altimeter and airspeed against the GPS altitude and groundspeed. I have a Garmin 196 also which I mount on the yoke if flying IMC, which can also be used for this purpose. "G. Sylvester" wrote in message . .. There was also an accident in a large turbojet aircraft (727?) years ago (as I recall it was a freighter) where the crew forgot to turn on the pitot heat before takeoff. They were climbing when the pitot tubes iced up, and crew responded to the increasing indicated airspeed by pitching up more and more until they entered a stall/spin. Not good. Needless to say, the crew perished. I went to a (as in one) IFR ground class. The instructor was very good but I simply decided to do it on my own. Nevertheless the one thing i got out of the class was possibly the story above. He showed a clip on a south american passenger transport jet (type?) where they just repainted the plane and they left some kind of tape over the pitot tubes. I would hope a ATP pilot flying jets could at least figure out what is happening when they have a single point failure. Gerald |
#23
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"Jeremy Lew" wrote in message
... I recently had a pitot/static system failure on climbout, Wow. What were the symptoms, and what turned out to be the cause? --Gary |
#24
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I had a pitot/static problem as a new PPL (clear weather) that was very
exciting. Airspeed was fine till about 20 feet off the ground. At that point airspeed would start dropping. I kept pushing the nose over and airspeed kept dropping. I then realized rpm's were normal, the propellor was attached, and everything sounded right. It scared the bejezus outta me. Turned out to be water in the static line. Afterwards, I realized I was way too dependant on that one indicator. Had it been IMC, it could have been very ugly. As someone else posted, I now keep an eye on gps ground speed on takeoff.... and I'm not even instrument rated yet. "Gary Drescher" wrote in message news "Jeremy Lew" wrote in message ... I recently had a pitot/static system failure on climbout, Wow. What were the symptoms, and what turned out to be the cause? --Gary |
#25
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"dlevy" wrote in message ... As someone else posted, I now keep an eye on gps ground speed on takeoff.... and I'm not even instrument rated yet. If you know your plane well the ASI should be one of the least-critical instruments to lose, at least on anything Skyhawk-class. Set power and pitch, and your airspeed will follow. As close to foolproof as anything gets in aviation. That's why if you look at an ultralight with only one instrument, it's probably a tach. Go up with a CFI sometime and tell him to cover the ASI while you do some pattern work. Of course every kind of failure can be distracting, that's why experienced pilots crash after having doors open in flight. GPS groundspeed is useless for flying the plane. What do you think you're getting by watching it? -cwk. |
#26
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I had water in the static lines one time in solid IMC. One pull of the
Alternate Static Source took care of it. That's what it is there for. :-) Jon Kraus PP-ASEL-IA '79 Mooney 201 Triple43Hotel dlevy wrote: I had a pitot/static problem as a new PPL (clear weather) that was very exciting. Airspeed was fine till about 20 feet off the ground. At that point airspeed would start dropping. I kept pushing the nose over and airspeed kept dropping. I then realized rpm's were normal, the propellor was attached, and everything sounded right. It scared the bejezus outta me. Turned out to be water in the static line. Afterwards, I realized I was way too dependant on that one indicator. Had it been IMC, it could have been very ugly. As someone else posted, I now keep an eye on gps ground speed on takeoff.... and I'm not even instrument rated yet. "Gary Drescher" wrote in message news "Jeremy Lew" wrote in message ... I recently had a pitot/static system failure on climbout, Wow. What were the symptoms, and what turned out to be the cause? --Gary |
#27
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GPS groundspeed implies airspeed. If the airspeed indicator is zero, rpm's
2500, the nose pitched up, and gps groundspeed holding at 80 knots...... which is wrong? "Colin W Kingsbury" wrote in message ink.net... snip GPS groundspeed is useless for flying the plane. What do you think you're getting by watching it? -cwk. |
#28
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"dlevy" wrote in message
... I had a pitot/static problem as a new PPL (clear weather) that was very exciting. Airspeed was fine till about 20 feet off the ground. At that point airspeed would start dropping. I kept pushing the nose over and airspeed kept dropping. I then realized rpm's were normal, the propellor was attached, and everything sounded right. It scared the bejezus outta me. Turned out to be water in the static line. Afterwards, I realized I was way too dependant on that one indicator. Had it been IMC, it could have been very ugly. Hm, shouldn't a blocked static line cause the airspeed indicator to show an increase in airspeed, rather than a decrease, with increasing altitude? --Gary |
#29
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If the static line were blocked but not the pitot then the
airspeed indication would decrease with increasing altitude. |
#30
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On 2005-01-12, dlevy wrote:
I had a pitot/static problem as a new PPL (clear weather) that was very exciting. Airspeed was fine till about 20 feet off the ground. At that point airspeed would start dropping. My first solo XC was my first time in a C-172 with an airspeed indicator in MPH. It took me about half of the first leg to figure out what was going on. My brain is really screwed up now: I fly a plane marked in MPH (with knots on the inner ring) and I tend to think about cruise and approach in knots and critical airspeeds in MPH. -- Ben Jackson http://www.ben.com/ |
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