just out of interest: pressure pattern navigation

Plane & Pilot Magazine | Feature Articles | Revisiting
Pressure ... Initiated in 1943, pressure-pattern navigation
is attributed to Dr. John Bellamy. His so-called "Bellamy
Drift" was used widely during the late 1940s, ...
www.planeandpilotmag.com/content/
pastissues/2001/mar/revisiting.html - 37k - Cached - Similar
pages


Flying Magazine - You want to put them where? The
relationship between barometric pressure and wind drift is
enshrined in the so-called Bellamy Drift, named for John
Bellamy, a civil engineer and ...
www.flyingmag.com/article.asp?section_
id=12&article_id=602&page_number=2 - 24k - Cached - Similar
pages


[PDF] AFI 11-2C-130 Volume 3, Checklist 5 File Format:
PDF/Adobe Acrobat - View as HTML
Whiz Wheel Formula for finding Bellamy Drift:. ZN. =.
DCA. Grnd Dist. 57.3. PRESSURE PATTERN ALTITUDE CHANGE.
FORMULA METHOD ...
www.e-publishing.af.mil/pubfiles/
af/11/afi11-2c-130v3cl-5/afi11-2c-130v3cl-5.pdf - Similar
pages




"xerj" wrote in message
...
| ... when using pressure pattern nav techniques, what's a
standard way for
| working out groundspeed for flight planning purposes? Do
you take the
| forecast curved route and divide it up into segments and
average it out?
|
| TIA
|
|