Compelling proof that a high quality, proven design never goes out of style.

That means greater reliability from a proven design.

With over 200 PWRs already in operation around the world this was a proven design.

Modern amateur-built airplanes, however, are based on proven designs using detailed instructions and high-tech materials.

Material based standards describe proven designs for particular circumstances.

"We adopted a proven design to simplify our work," he said in an interview.

Transbotics is known for rugged, proven designs that last in industrial environments.

They don't have to use a proven design, because they're only risking themselves.

Compelling proof that a high quality, proven design never goes o..

However, the designers wanted an engine with a proven design and a racing pedigree.