Metallic Details has released in 1/48 scale resin Mk.46 and Mk.54 Torpedoes and there are lightweight versions of the two for use with helicopters.
MDR4847 - Torpedo Mk-46 – 1/48
Kit contains resin parts for assembly of 2 torpedoes Mk-46 in version for aircraft. The Mark 46 torpedo is lightweight aerial anti-submarine warfare torpedo.
MDR4848 - Torpedo Mk-46 for helicopters – 1/48
Kit contains resin parts for assembly of 2 torpedoes Mk-46 in version for helicopters. The Mark 46 torpedo is lightweight aerial anti-submarine warfare torpedo.
MDR4849 - Torpedo Mk-54 – 1/48
Kit contains resin parts for assembly of 2 torpedoes Mk-54 in version for aircraft. The Mark 54 torpedo is lightweight aerial anti-submarine warfare torpedo.
MDR4850 - Torpedo Mk-54 for helicopters – 1/48
Kit contains resin parts for assembly of 2 torpedoes Mk-54 in version for helicopters. The Mark 54 torpedo is lightweight aerial anti-submarine warfare torpedo