# Lawrance J-1

> R-9 piston aircraft engine, initial version of the Whirlwind family

**Wikidata**: [Q6503734](https://www.wikidata.org/wiki/Q6503734)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Lawrance_J-1)  
**Source**: https://4ort.xyz/entity/lawrance-j-1