Rolls Royce Hawk Note: This item is currently in storage. The British Rolls Royce Hawk engine was used in the British-Built SS "Zero" (Submarine Scout, Zero) airship of which 76 were built. Two of these World War I airships -- SSZ23 and SSZ24 -- were used by American forces flying out of Howden, England, for operations against German U-boats. TECHNICAL NOTES: Model: Hawk Type: Six-cylinder, liquid-cooled, in-line Rated hp: 75 Click here to return to the Featured Accessions index.