DH4

DH4 is the abbreviation for:

• De Lackner DH-4 Heli-Vector , see De Lackner HZ-1
• the De Havilland DHC-8-400 turboprop aircraft , see De Havilland DHC-8-400
• the single-engine, two-seater double-decker Airco DH4
• DH4 (RAJA) , a series of diesel multiple units of the RAJA passenger transport company of the Railway Company of the Islamic Republic of Iran

This is a disambiguation page for differentiating between several terms identified with the same word.