See also

Sources

• FAA Type Data Certificate, Helicopter Specification No. 1H2, rev. 3; 7 July 1961.
• GAA Rotorcraft Flight Manual for Model S-52-3 Helicopter, Publication No. SA4045-10 Register 2, Sikorsky Aircraft Division of United Aircraft, 1952.
• Donald, David, ed. "Sikorsky S-52". Encyclopedia of World Aircraft. Etobicoke, Ontario: Prospero Books, 1997. ISBN 1-85605-375-X.
• Harding, Stephen. "Sikorsky H-28". U.S. Army Aircraft Since 1947. Shrewsbury, England: Airlife, 1990. ISBN 1-85310-102-8.
• Polmar, Norman, and Floyd D. Kennedy, Jr. Military Helicopters of the World. Annapolis, MD: Naval Institute Press, 1981. ISBN 0-870321-383-0.

External links

• H-18 page on GlobalSecurity.org
• Sikorsky S-52-1 and S-52-2/HO5S/H-18 pages on aviastar.org