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#41
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"Gord Beaman" wrote in message ... (B2431) wrote: From: (Walt BJ) Gentleman, the F4E does indeed have static ports, two of them. They are located ON the pitot boom. snip Walt BJ Walt, that's why I referred to it as the "pitot-static" tube. I guess I could have been more clear in referring to static ports as a separate entity. I was referring to the static ports flush mounted on the fuselage eg; KC-135. The KC-135 has pitot tubes and the static ports are elsewhere on the fuselage. A pitot-static tube has static ports a few inches back from the inlet as in F-4E, T-39 etc. As for the static ports on the F-4E pitot-static tube there were 4 small holes in pairs on opposite sides of the tube IIRC(it's been 23 years since I last worked on an F-4E). In any event the ports were all routed to a single fitting extending out the back of the pitot-static tube coaxially with the pitot fitting and heater connector. The pitot and static fittings were -4 and were connected to lengths of nylon tubing running aft along the right side of the radome. Dan, U. S. Air Force, retired That reminds me...there was an odd setup on the C-119 with respect to static ports...there was one on each side of the big flat sides of the fuselage which were connected together then "teed" off to feed the ASI, altimeter and VSI. It was a little 'trick' question as to the reason for this. Apparently it's purpose was to cancel out the effect of 'skidding' the fuselage. With those huge 'barn door' sides the effect of skid was quite large. Could this have been why the F-4E's static ports were 'doubled up'? -- -Gord. Yes, Gord, same purpose in both cases though I ran into one example that showed me it isn't always that critical. later for that First, I'd like to mention that there are a few examples of the two types on my site that I've referred to from time to time in this ongoing idiocy with Splaps. The original Pitot Tube with flush mounted static ports is used on the B-727, B-757, DC-10 and probably many others. I've represented it with: http://home.att.net/~j.knoyle/pitot57a.gif and http://home.att.net/~j.knoyle/pitot10.gif What we referred to as a Combined Pitot Probe is used on the B-737, B-747, B-767 etc. That type is shown on: http://home.att.net/~j.knoyle/pitot.gif The standby system still uses flush mount static ports. Before one concludes that one system is 'newer. i.e. 'better' check out http://home.att.net/~j.knoyle/pitot777.gif Lots of the plumbing is replaced with wire, though. I borrowed that diag. from: http://http--euler.ecs.umass.edu-ece655-boeing777.ppt/ As for that story I promised in para. 1. One of our top-notch gate mechanics at SFO had to replace an altimeter on a B-737 for something like a lighting problem and when the aircraft failed the required static system leak check, he cancelled the flight and they drug the sick bird over to me to fix. I set up and did a static leak test from the right side probe and darned if the system wasn't perfect. Since I have great respect for this mechanic and his work, a phone call was in order. I learn that his leak test from the *left* side can't even get the needle off of the peg. The aircraft had been flying around for months with the static line disconnected from the left probe and capped and any error was too small to notice. JK |
#42
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"Jim Knoyle" wrote in message ... "Gord Beaman" wrote in message ... (B2431) wrote: From: (Walt BJ) Gentleman, the F4E does indeed have static ports, two of them. They are located ON the pitot boom. snip Walt BJ Walt, that's why I referred to it as the "pitot-static" tube. I guess I could have been more clear in referring to static ports as a separate entity. I was referring to the static ports flush mounted on the fuselage eg; KC-135. The KC-135 has pitot tubes and the static ports are elsewhere on the fuselage. A pitot-static tube has static ports a few inches back from the inlet as in F-4E, T-39 etc. As for the static ports on the F-4E pitot-static tube there were 4 small holes in pairs on opposite sides of the tube IIRC(it's been 23 years since I last worked on an F-4E). In any event the ports were all routed to a single fitting extending out the back of the pitot-static tube coaxially with the pitot fitting and heater connector. The pitot and static fittings were -4 and were connected to lengths of nylon tubing running aft along the right side of the radome. Dan, U. S. Air Force, retired That reminds me...there was an odd setup on the C-119 with respect to static ports...there was one on each side of the big flat sides of the fuselage which were connected together then "teed" off to feed the ASI, altimeter and VSI. It was a little 'trick' question as to the reason for this. Apparently it's purpose was to cancel out the effect of 'skidding' the fuselage. With those huge 'barn door' sides the effect of skid was quite large. Could this have been why the F-4E's static ports were 'doubled up'? Yes, Gord, same purpose in both cases though I ran into one example that showed me it isn't always that critical. later for that Knoyle, village idiot, you have already demonstrated that you don't even know what a pitot tube is. Hit the bricks, dumbass. |
#43
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That reminds me...there was an odd setup on the C-119 with respect to static ports...there was one on each side of the big flat sides of the fuselage which were connected together then "teed" off to feed the ASI, altimeter and VSI. It was a little 'trick' question as to the reason for this. Apparently it's purpose was to cancel out the effect of 'skidding' the fuselage. With those huge 'barn door' sides the effect of skid was quite large. Could this have been why the F-4E's static ports were 'doubled up'? -- -Gord. On the F-4E it is possible that the doubling was for that purpose. Dunno, never thought about it. Many large aircraft like the C-130 have static ports on both sides that are teed together. On the C-130 there are a pair of static ports on each side forward of the main gear wells. One is paired with one on the other side for the pilot's system and the other ones are paired for the co-pilot's and nav's systems. The pitot tubes only run to one system ie; pilot's side or copilot's side. There was a third static port on the right side of some of the C-130s I worked on. It would have been outboard of the Nav's station. I don't recall what it went to. AFCS? That would be a long reach since the AFSC amp was near the crew entrance door on the left as you climb in. The static ports on most of the aircraft I worked on looked like salt shaker tops. Maybe that's what tarver meant by "screened over." Dan, U. S. Air Force, retired |
#44
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"Jim Knoyle" wrote:
Yes, Gord, same purpose in both cases though I ran into one example that showed me it isn't always that critical. later for that Ok, thanks Jim, odd how some situations can go for years before they're found. Reminds me of a fire detector fault on a twin jet airliner that went for a long time undetected. Apparently the fire-detectors were cross connected and, because the detector test circuit for both engines was activated by a single switch the problem wasn't noticed. It was noticed (bigtime) when, after a fire warning on one engine (which was immediately caged) the other engine failed (it was the one that actually was on fire). It seems to me that this happened in the UK but I cannot find it now in my accident files. -- -Gord. |
#45
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"B2431" wrote in message ... That reminds me...there was an odd setup on the C-119 with respect to static ports...there was one on each side of the big flat sides of the fuselage which were connected together then "teed" off to feed the ASI, altimeter and VSI. It was a little 'trick' question as to the reason for this. Apparently it's purpose was to cancel out the effect of 'skidding' the fuselage. With those huge 'barn door' sides the effect of skid was quite large. Could this have been why the F-4E's static ports were 'doubled up'? -- -Gord. On the F-4E it is possible that the doubling was for that purpose. Dunno, never thought about it. Why would you think about it kook. You were never there, Dan. |
#46
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"Gord Beaman" wrote in message ... "Jim Knoyle" wrote: Yes, Gord, same purpose in both cases though I ran into one example that showed me it isn't always that critical. later for that Ok, thanks Jim, odd how some situations can go for years before they're found. In Jm's case they go on forever, being that he doesn't even know what a pitot tube is. |
#47
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#48
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"Gord Beaman" wrote in message ... (B2431) wrote: The static ports on most of the aircraft I worked on looked like salt shaker tops. Maybe that's what tarver meant by "screened over." Could be...I hardly ever think about anything that he says. You have bought off on Knoyle's archive troll havn't you, Gord? That would mean you know little to nothing about airplane systems, so I can see why you wiould try to support his bull****. Really now, Gord, once Dan didn't know there is a static temperature probe in a jet's pitot tube, the chesse was binding. You can't rehabilitate the idiot. Just have fun bull****ting with Dan and forget about his technical acumen, 'cause he has none. |
#49
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"Tarver Engineering" wrote:
"Gord Beaman" wrote in message .. . (B2431) wrote: The static ports on most of the aircraft I worked on looked like salt shaker tops. Maybe that's what tarver meant by "screened over." Could be...I hardly ever think about anything that he says. You have bought off on Knoyle's archive troll havn't you, Gord? That would mean you know little to nothing about airplane systems, so I can see why you wiould try to support his bull****. Really now, Gord, once Dan didn't know there is a static temperature probe in a jet's pitot tube, the chesse was binding. You can't rehabilitate the idiot. Just have fun bull****ting with Dan and forget about his technical acumen, 'cause he has none. grin -- -Gord. |
#50
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"Gord Beaman" wrote in message ... "Tarver Engineering" wrote: "Gord Beaman" wrote in message .. . (B2431) wrote: The static ports on most of the aircraft I worked on looked like salt shaker tops. Maybe that's what tarver meant by "screened over." Could be...I hardly ever think about anything that he says. You have bought off on Knoyle's archive troll havn't you, Gord? That would mean you know little to nothing about airplane systems, so I can see why you wiould try to support his bull****. Really now, Gord, once Dan didn't know there is a static temperature probe in a jet's pitot tube, the chesse was binding. You can't rehabilitate the idiot. Just have fun bull****ting with Dan and forget about his technical acumen, 'cause he has none. grin I thought so. The Knoyle archive troll is a wonderful idiot detector. |
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