[U.S. NAVY TOWED MAGNETIC AIRBORNE DETECTION SYSTEM]

[Music] [Music] the threat posed by enemy submarines to our Fleet combat forces and Coastal Shores is steadily increasing because of improvements in speed operating depth qu in methods and submerged endurance to counter this threat corresponding improvements in anti-submarine Warfare avionic systems such as mad must be achieved increasing the Mad Effectiveness will result in better localization classification and tracking of submerged submarines including particularly those capable of Greater operating depths expected in the future one phase of the US Naval Air development Center's mad Improvement program concerns the development of a towed mad system this Towing technique permits the magnetometer to be housed in the non-magnetic environment of a vehicle towed by the ASW aircraft the Airborne vehicle is constructed of lightweight epoxy plastic reinforced with fiberglass the vehicle consists of a cylindrical fuselage with a swept Wing design the toe bar is located only 8 in from the vehicle's tapered nose the toad vehicle and launcher shown here are installed on a p2h aircraft wing bomb rack the launcher mechanism provides for launching retrieving and storage of the toad vehicle and the tow cable toad mad systems developed to date for fixed Wing aircraft applications have been installed at various wing and fuselage locations flight tests were conducted at the Naval Air Development Center Johnsville Warminster Pennsylvania Key West Florida and Alberta Canada results of these instrumented flight tests indicated that the toad vehicle flies a path corresponding to that of the parent aircraft and is inherently stable during All Phases of launching Towing and retrieving flight tests have demonstrated toad mad systems compatibility with Patrol type aircraft operation the towed vehicle can be launched towed and retrieved throughout the p2h aircraft speed range of special interest to the pilot of the ASW aircraft is the fact that aircraft maneuverability is not restricted by the toad mad system when the Airborne vehicle is toad a distance ranging from 100 to 200 ft from the parent aircraft the magnetometer is found to be removed from the objectionable magnetic environment of the parent aircraft the exact distance is a function of the aircraft's magnetic characteristics the more favorable magnetic environment of a non-magnetic vehicle towed behind the aircraft permits the realization of the full potential of the new Atomic level type magnetometer toad mad therefore provides substantially increased mad detection ranges and detection probabilities toad mad also eliminates the requirement for extensive aircraft compensation which has been a major and very serious Fleet problem two mad tow vehicles are shown being flight tested simultaneously from one aircraft to evaluate the gradiometer concept at the Mad operator's position is a simple power onoff switch and a to to vehicle in out switch no special training is required to operate the toad vehicle system toad mad systems have also been successfully flight tested from carrier based aircraft the launch unit is shown installed under the port wing of an s2f aircraft mad tow vehicle and launcher systems have proven to be extremely reliable an mad tow vehicle launcher system developed at the Naval Air Development Center has been used extensively by the US Navy oceanographic office for worldwide magnetic survey work the national aeronautical establishment Ottawa Canada has fabricated a similar system for magnetic research work over 3,000 flight hours have been logged on fixed wi aircraft employing the toad mad system to date only one toad vehicle has been lost this loss being clearly attributed to a malfunction in the launching mechanism toad mad systems catapulting and arrested Landing suitability tests were successfully conducted by the Naval Air test facility Lake Hurst New Jersey the flush deck catapult is shown catapulting an S2 F2 aircraft with a towed mad system installed on the port Wing the Mark 7 mod 2-3 arresting gear is shown arresting the s2f 2 aircraft no adverse runout characteristics were observed either on the Catapult or a resting gear during this performance evaluation maximum acceleration takeoffs and mirror approach Landings were accomplished without difficulty in the past short cable stability has presented a problem when launching and retrieving toad bodies from aircraft however the nose toad vehicle developed at the Naval Air Development Center for the Mad system is very stable at Short cable lengths the Mad vehicle short cable stability characteristics are demonstrated by stopping the vehicle at cable lengths of 25 ft 10 ft 5T two feet and finally one foot before being secured in the launcher New Concept mad toad vehicles and launchers are being designed with a 50% reduction in size and weight a low drag launcher is shown installed on the wing and fuselage of a carrier based aircraft in summary the toad magnetic Airborne detection system provides for a substantially increased localization classification and tracking capability additionally and perhaps most important the system eliminates the requirement for Air C magnetic compensation a requirement posing a substantial problem to our naval fleet [Music] the