Stamp: Biplane in flight - Pair (South-West Africa 1930)
Biplane in flight - Pair (South-West Africa 1930)
27 November (South-West Africa ) within release Air post goes into circulation Stamp Biplane in flight - Pair face value 4 South African penny
| Stamp Biplane in flight - Pair in catalogues | |
|---|---|
| Michel: | Mi:NA-SW 136I |
| Stamp Number: | Sn:NA-SW C1 |
Stamp is square format.
Also in the issue Air post:
- Stamp - Biplane in flight - Pair face value 4;
- Stamp - Biplane in flight - Pair face value 1;
- Stamp - Biplane in flight face value 4;
- Stamp - Biplane in flight face value 1;
Stamp Biplane in flight - Pair it reflects the thematic directions:
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.
