20 June (Hungary ) within release Air Post goes into circulation Stamp Hungarian in Slovakia calling for help, aircraft face value 40 Hungarian fillér
Stamp Hungarian in Slovakia calling for help, aircraft in catalogues | |
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Michel: | Mi:HU 505 |
Stamp Number: | Sn:HU C29 |
Yvert et Tellier: | Yt:HU PA29 |
Stamp is vertical format.
AirmailAlso in the issue Air Post:
Stamp Hungarian in Slovakia calling for help, aircraft 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.