# Sikorsky S-69

> experimental co-axial compound helicopter

**Wikidata**: [Q1432561](https://www.wikidata.org/wiki/Q1432561)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Sikorsky_S-69)  
**Source**: https://4ort.xyz/entity/sikorsky-s-69


## References

1. Freebase Data Dumps. 2013
2. U.S. Army Aircraft Since 1947