KELPkid From United States of America, joined Nov 2005, 6237 posts, RR: 4
Reply 1, posted (7 years 5 months 3 weeks 16 hours ago) and read 2309 times:
When the pitot tube probe is placed far ahead of the aircraft, it is much less prone to installation error (and, as a matter of fact, helps the engineers determine what the installation error is on the final placement of the pitot tube ). Also, many flight test articles contain Angle-of-Attack instrumentation in the long test boom (extremely useful data for flight testing!).
Celebrating the birth of KELPkidJR on August 5, 2009 :-)
It sound like you are making a point, thanks KELPkid.
One final note (so far) to those of you who make fun of the poor plane. Everyone thinks that it's a Pan Am plane just because it seems that way - blue and white with a visible letter "P" just like the Pan Am plane in the middle.
Naturally Pan Am would not like to have their name om such a weird looking plane. So I thinks that Boeing must have painted Pinocchio on the fuselage instead.
Yours in realtime
Look at me, I´m riding high, I´m the airbornmaster of the sky...
Oly720man From United Kingdom, joined May 2004, 6593 posts, RR: 11
Reply 8, posted (7 years 5 months 2 weeks 6 days 23 hours ago) and read 2076 times:
Quoting JHSfan (Reply 7): Right now i'm looking for more info on the net about the USAF/NASA plane.
It was used in the early 1980's for winglet research. In the db there is a side view of the aircraft on the same day and the remark mentions it having winglets on. The nose probe was presumably to get accurate attitude information to correlate the winglet results.
This is a review of the tests..... It's huge >30Mb, 192 pages.
474218 From United States of America, joined Oct 2005, 6340 posts, RR: 9
Reply 10, posted (7 years 5 months 2 weeks 6 days 20 hours ago) and read 2025 times:
Quoting JHSfan (Thread starter): I suppose that Boeing wanted data from a point forward of the plane, a point where the air is still relatively "untouched" by the flying plane.
Someone must have an idea of why, thanks.
JHSfan, Your are correct, the probe is called a "Gust Boom" it allows turbulence to be measured without interference from the airframe.
KC135TopBoom From United States of America, joined Jan 2005, 12023 posts, RR: 52
Reply 12, posted (7 years 5 months 2 weeks 5 days ago) and read 1783 times:
The boom gathers very accurate TAS (true airspeed) information. A second method to get accurate TAS is to trail a small drogue off the tip of the vertical stabilzer. But, the boom can be used to get additional information, as already has been mentioned.