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In 1926, Congress passed the Civil Aeronautics Act. The Department of
Commerce was now responsible for civil aviation in the US. To address the
law passed by Congress, The Department of Commerce established the
"Division
of Aeronautics".
The Division created regulations which airplane manufacturers, aircraft
mechanics and owners would have to comply.
All aircraft builders after this time would be issued an ATC (Approved
Type
Certificate)to manufacture aircraft of a like kind.  Any changes to the
design had to be covered by an STC (Supplemental Type Certificate). Each
approved aircraft would now be issued a license number as they were sold
by
the manufacturer. This would be issued in the form of an "N" number. The
"N"
was chosen for the country of orgin, hence the United States. Great
Brittan
used "G", Germany used "D", Switzerland used "SW" and Canada "C".
To further identify the US built airplanes an additional letter was issued
after the "N" to form NC.  The "C" denoted the aircraft was issued an ATC
number and was approved for sale on the commercial market. Others also
included were, NX (Experimental), NR (Restricted) and NS (Government).
As time passed and aviation grew, the Division was removed from the
Department of Commerce and changed to the CAA (Civil Aeronautics
Administration). The CAA was later broken up into two parts; the CAA and
the
CAB (Civil Aeronautics Board)  The board oversaw the airlines and the CAA
oversaw the private sector. As one might guess, there was indeed conflict
between the two powers. Both sought domination over the other until it got
so bad they were both dissolved and the FAA was born.
The FAA has been cooperative in allowing historical aircraft to display
their original lettering issued for their time period.  Therefore the
ERcoupe can display in their original form; (Upper right, lower left wing
12" high numbers and 6" numbers on both sides of the vertical tail. You
may
also select two other options. [1] If your airplane is over 30 years-old,
you may display small 3" letters on the fuselage, or on the vertical tail,
or [2] Use the 12" letters on both sides of the fuselage. If you decide to
use the 3" letters, you will not be allowed to leave the Unites States as
foreign countries do not accept anything but the 12" letters/numbers.
I know this is long, but the weather here on the East Coast is downright
awful, and I needed something to do to keep from getting cabin feaver.
George Frebert







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