Thanks for the clarifications, Steven. I'll try to make the corrections
ASAP.

And many thanks again for the scans!
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

"Steven P. McNicoll" wrote in message
ink.net...

"Jay Honeck" wrote in message
news:lpnDb.555418$Tr4.1505046@attbi_s03...

Thanks to Steven McNicoll, a regular newsgroup contributor, we've now
got
old Iowa City Sectionals (going back to 1939!) available for download on
our "History of the Iowa City Airport" website.

These charts provide a fascinating glimpse into our past, and
graphically
illustrate the evolution of our national airspace, from the light beacon
days, through the A-N radio ranges, up to the current VOR system.

Check 'em out at
http://www.alexisparkinn.com/iowa_ci...nal_charts.htm


"1945 -- The magenta triangles depict the A/N radio ranges, emanating from
Moline and Des Moines."

The image shows just a portion of the magenta feather of the east leg from
the Des Moines Range, it's on the left side of the image. The north-south
feather to the east of Iowa City is from the Burlington Range.


"1948 -- The light beacons are no longer depicted on the chart"

The airway light beacons are still depicted on this chart.


"1953 - Iowa City's VOR first appears, and Des Moines' A/N radio range
disappears"

The magenta feathers defining the range legs were shortened on the
sectionals sometime between 1948 and 1953. The Des Moines Range was still
in operation in 1953 (and in 1960 as well), but the eastern leg fell short
of the scanned area.

Perhaps a bit of explanation about these charts is in order. No doubt a
few
people have thought; "Des Moines Sectional? There is no Des Moines
Sectional, Des Moines is on the Omaha Sectional." Sectional charts
underwent a major overhaul circa 1968-1970. The old series sectionals
covered less than half the area of the new series because they were
printed
on just one side. They were initially just blank on the back, then
aeronautical information was added to the back. The airport information
that today appears in the Airport/Facility Directory was on the back, as
well as general information that is now in the AIM. The old series charts
generally covered two degrees of latitude and six degrees of longitude, it
took 87 charts to cover the 48 contiguous states. The new series charts
generally cover four degrees of latitude and eight degrees of longitude,
it
takes 37 charts to cover the contiguous US.