FIELD: transport.
SUBSTANCE: invention relates to aircraft engineering, particularly, to small aircraft. Aircraft porthole comprises the frame (5) to secure it to aircraft fuselage (4) and at least one glass fitted in said frame by sealing system (7-11). Note here that said glass (20) has inner and outer surfaces. Glass (20) is produced so that at the rest state when there is no pressure difference between said inner and outer surfaces it has concavity in its outer surface. Note here that at the second state when there is the actual pressure difference between said inner and outer surfaces the glass concavity is partially or completely smoothed.
EFFECT: decreased weight.
19 cl, 9 dwg
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