AVIONICS

The DM N4-4 navigation antenna is a true center-fed antenna which minimizes bearing errors when receiving VOR and ILS signals. The N4-4  provides considerably more gain at the horizon than fuselage mounted ""deer horn"" or ""vee"" antennas. Improved signal to noise ratio and reduced errors is due to the N4-4 greater discrimination against vertically polarized signals, and when properly installed on helicopters greater rotor modulation rejection is also provided. To obtain maximum performance, the installation location must be carefully considered.

The N4-33 VOR/LOC antenna has a low drag balanced loop design for use on high performance aircraft where aerodynamic drag must be kept to a minimum. The N4-15 antenna provides increased range and reduced barring error. Rugged construction provides erosion resistance; a flush fiberglass housing improves aerodynamics; and a foam-filled assembly ensures maximum durability.

The DM N4-17 VOR/LOC/Glide slope antenna is designed for general aviation, commercial, and military aircraft that operate up to Mach 1.0. DM N4-17 is designed to provide a low-cost, lightweight, and low-drag antenna for state-of-the-art avionics. This antenna's performance parameters exceeds environmental specifications of MIL-5400 Class 3 equipment; therefore, it can be installed on single engine to jet engine aircraft. The balanced loop design of the DM N4-17/N assures an omnidirectional radiation pattern at the horizon to obtain maximum signal for VOR and area navigation which provides more receiving distance and reliable system performance.

The DM N27 marker beacon antenna features a rugged and lightweight design for receiving 75 MHz marker beacon signals. The DM N27 antenna has a low-drag design that is simple to install. Mounting to the aircraft does not require a any cutting of airframe structural members. Its dielectric foam filled, polyester-fiberglass radome offers resistance excellence resistance to moisture and Skydrol while the metal leading edges offer erosion protection.