Finns det en definition av ljus / medium / tungt flygplan?

Avsnitt 4.9.1.1 av ICAO PANS-ATM-Doc 4444 Air Traffic Management definierar LIGHT, MEDIUM & HEAVY-flygplan i syfte att väcka separation:

4.9.1 Wake turbulence categories of aircraft

4.9.1.1 Wake turbulence separation minima shall be based on a grouping of aircraft types into three categories according to the maximum certified take-off mass as follows:

a) HEAVY (H) — all aircraft types of 136,000kg or more;

b) MEDIUM (M) — all aircraft types less than 136,000kg but more than 7,000kg; and

c) LIGHT (L) — aircraft types of 7,000kg or less.

4.9.1.2 Helicopters should be kept well clear of light aircraft when hovering or while air taxiing.

Note 1.— Helicopters produce vortices when in flight and there is some evidence that, per kilogram of gross mass, their vortices are more intense than those of fixed-wing aircraft.

Note 2.— The provisions governing wake turbulence minima are set forth in Chapter 5, Section 5.8, and Chapter 8, Section 8.7.3.

FAA svarar på denna fråga här: Viktklass

Weight Class Weight class is based are assigned by APO130 based on the TFMS observed aircraft codes. There are 6 categories -- (A) Heavy, (B) B757, (C) Large Jet, (D) Large Commuter, (E) Medium, (F) Small.

(A) Heavy: Any aircraft weighing more than 255,000 lb such as the Boeing 747 or the Airbus A340;

(B) B757: Boeing 757 all series;

(C) Large Jet: Large jet aircraft weighing more than 41,000 and up to 255,000 lbs such as the Boeing 737 or the Airbus A320;

(D) Large Commuter: Large non-jet aircraft (such as the Aerospatiale/Alenia ATR-42 and the Saab SF 340), and small regional jets (such as the Bombardier Canadair Regional Jet), weighing more than 41,000 and up to 255,000 lbs;

(E) Medium: Small commuter aircraft including business jets weighing more than 12,500 up to 41,000 lbs such as the Embraer 120 or the Learjet 35; and

(F) Small: Small, single, or twin engine aircraft weighing 12,500 lbs or less such as the Beech 90 or the Cessna Caravan.

Unknown; refers to unspecified equipment.

"Light" Aircraft följer samma definition som "Small" i ovanstående text.

Det var en Grumman Tiger landning på min lokala flygplats som inte uppmärksammade, ignorerade tornets varningsvågturbulensvarning och blev vred inverterad och kraschade sedan som en följd av vaken turbulens från en UH-60 militär helikopter som hade avgått flera minuter tidigare. Piloten gick mycket lyckligtvis, men flyget var förstört.

Observera att även om helikoptrar inte nämns i ditt inlägg, lämnar någon helikopter persistent rotorvask och du bör vara extremt försiktig och vänta flera minuter innan du försöker ta ut eller landa varhelst en helikopter har varit.