Rocket MK 40 FFAR Free 3D model

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The Mk 4 and Mk 40 FFARs comprise conventional 70 mm (2.75 in) diameter unguided rockets powered by solid-propellant motors with four folding fins and a matching exhaust nozzle and warhead. The standard helicopter-launched Mk 40 rocket motor stands at 1.01 m long, weighs 5 kg and, due to its scarfed exhaust nozzle, generates an induced spin rate of 20 rev/s. A burn time of 1.55 seconds is delivered by the extruded N5 double-base propellant charge, which produces a total impulse of 514 daN. Identical in all respects except for a non-scarfed exhaust nozzle, the Mk 4 rocket motor is tailored for fixed-wing aircraft applications and as a result yields no spin rate whatsoever. Equipped with an M151 HE warhead and M433 nose fuze, both variants boast a length of 1.42 m, a body diameter of 70 mm, and weigh approximately 10 kg. Warheads associated with the Mk 4 and Mk 40 rockets encompass the following: Mk 1, a 2.63 kg blast/fragmentation; Mk 5, 2.63 kg anti-tank; Mk 61, 2.95 kg target practice; Mk 64, 3.91 kg blast/fragmentation; Mk 67, 2.04 kg smoke containing white phosphorus; M151, a 4.68 kg HE device which is 0.41 m long, filled with 1.04 kg of Composition B-4 explosive and serves for anti-personnel and anti-material targets; M229, a 7.62 kg HE item that stands at 0.68 m long; M247, an anti-tank shaped charge; and the WDU-4A/A, a flechette warhead in addition to those mentioned earlier. Furthermore, the Mk 40 rockets have also been linked to several variants that feature various configurations, each serving a unique purpose and operating requirement.