what is it?
The Helio Rat'ler (as in Rattlesnake) was an agricultural spraying aircraft to be produced by Helio Aircraft. The aircraft featured the wings and tail of a Helio Courier on a new, low-wing fuselage, and a Lycoming IO-720 eight-cylinder engine producing 400 horsepower. The prototype Rat'ler (registered N4405S) was exhibited at the Agricultural Aviation Convention in Las Vegas in 1984.
spec sheet
- first flight
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- number built
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- role
- agricultural aircraft
- makers
- Helio Aircraft Company
- engines
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- top speed
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- range
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Specs are for the version in the Wikipedia article's specification section. Blank means the sources don't say.
Sources: Wikidata Q5705419, Wikipedia: Helio Rat'ler (CC BY-SA 4.0).Updated 2026-10-24.