The Helio Rat'ler (as in

Rattlesnake Rattlesnakes are venomous snakes that form the genus, genera ''Crotalus'' and ''Sistrurus'' of the subfamily Crotalinae (the pit vipers). All rattlesnakes are vipers. Rattlesnakes are predators that live in a wide array of habitats, hunting sm ...

) was an agricultural spraying aircraft to be produced by Helio Aircraft. The aircraft featured the wings and tail of a

Helio Courier The Helio Courier is a cantilever high-wing light Short Take-Off and Landing, STOL cargo aircraft, utility aircraft designed in 1949. Around 500 of these aircraft were manufactured in Pittsburg, Kansas, from 1954 until 1974 by the Helio Aircraf ...

on a new, low-wing fuselage, and a

Lycoming IO-720 The Lycoming IO-720 engine is a large displacement, horizontally opposed, eight-cylinder aircraft engine featuring four cylinders per side, manufactured by Lycoming Engines. There is no carbureted version of the engine, which would have bee ...

eight-cylinder engine producing 400 horsepower. The prototype Rat'ler (

registered Registered may refer to: * Registered mail, letters, packets or other postal documents considered valuable and in need of a chain of custody * Registered trademark symbol, symbol ® that provides notice that the preceding is a trademark or service ...

''N4405S'') was exhibited at the Agricultural Aviation Convention in Las Vegas in 1984.

References

* 1980s United States agricultural aircraft Rat'ler Single-engined tractor aircraft Low-wing aircraft {{aero-1980s-stub