# SB-1 Defiant

> experimental gyrodyne by Sikorsky and Boeing

**Wikidata**: [Q54933180](https://www.wikidata.org/wiki/Q54933180)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Sikorsky–Boeing_SB-1_Defiant)  
**Source**: https://4ort.xyz/entity/sb-1-defiant