Stamp: Airplane over the Cathedral in Sofia (Bulgaria 1940)
Airplane over the Cathedral in Sofia (Bulgaria 1940)
15 January (Bulgaria ) within release Aircraft and Landscapes goes into circulation Stamp Airplane over the Cathedral in Sofia face value 45 Bulgarian lev
| Stamp Airplane over the Cathedral in Sofia in catalogues | |
|---|---|
| Michel: | Mi:BG 386 |
Stamp is square format.
Also in the issue Aircraft and Landscapes:
- Stamp - Aircraft Hirtenberg HV 15 face value 1;
- Stamp - Airmail Plane face value 2;
- Stamp - Plane over the Ruins of the Asseburg face value 4;
- Stamp - Ba'kovo Monastry face value 6;
- Stamp - Aircraft, Locomotive and Motorcyclist face value 10;
- Stamp - Castle in Sofia face value 12;
- Stamp - Pirin Mountains face value 16;
- Stamp - Rila Mountains and Rila Monastery face value 19;
- Stamp - Aircraft and Swallow face value 30;
- Stamp - Airplane over the Cathedral in Sofia face value 45;
- Stamp - Aircraft over the Shipka-Memorial face value 70;
- Stamp - Aircraft and Monogram of the Tsar face value 100;
Stamp Airplane over the Cathedral in Sofia it reflects the thematic directions:
Aviation is the practical aspect or art of aeronautics, being the design, development, production, operation and use of aircraft, especially heavier than air aircraft. The word aviation was coined by French writer and former naval officer Gabriel La Landelle in 1863, from the verb avier (synonymous flying), itself derived from the Latin word avis ("bird") and the suffix -ation.
An aircraft is a machine that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. The human activity that surrounds aircraft is called aviation. Crewed aircraft are flown by an onboard pilot, but unmanned aerial vehicles may be remotely controlled or self-controlled by onboard computers. Aircraft may be classified by different criteria, such as lift type, aircraft propulsion, usage and others.
