thumb|Skywriting over Oshkosh, Wisconsin during EAA's Airventure in 2008. Skywriting is the process of using one or more small aircraft, able to expel special smoke during flight, to fly in certain patterns that create writing readable from the ground. These messages can be advertisements, general messages of celebration or goodwill, personal messages such as a marriage proposals and birthday wishes, or acts of protest.
thumb|Skywriting over Oshkosh, Wisconsin during EAA's Airventure in 2008. Skywriting is the process of using one or more small aircraft, able to expel special smoke during flight, to fly in certain patterns that create writing readable from the ground. These messages can be advertisements, general messages of celebration or goodwill, personal messages such as a marriage proposals and birthday wishes, or acts of protest.
==Description== The typical smoke generator consists of a pressurized container of viscous oil, such as Chevron/Texaco "Canopus 13" (formerly "Corvus Oil"). The oil is injected into the hot exhaust manifold, vaporizing it into a huge volume of dense white smoke.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).