M247 Narednik Jork

M247 narednik Jork
Zemlja	Sad
Ulogu	40-mm samohodni protivavionski top
Dizajniran	1977–1985
Izgradio	50

Foto galerija narednika M247 Iork, The M247 narednik Jork zasnovan je na šasiji srednjeg tenka M48A5 Patton. Pokreće ga Continental AVDS-1790-2D dizel motor, koji razvija 750 konjskih snaga. M247 je opremljen sa potpuno stabilizovanim dvostrukim 40-mm Bofors protivavionskim topovima. Ovi topovi su poboljšali brzinu paljbe. Vozilo može precizno pucati u pokretu. M247 ispaljuje HE i HE-FRAG metke protiv vazdušnih ciljeva i AP metaka protiv oklopnih vozila. Ukupno se prenosi 580 metaka. Ponovno punjenje traje manje od 15 minuta.

Izvor: M247 na Vikipediji

M247 Sergeant York
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M247 Sergeant York Walk Around
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The Shield that Never Stood

Čaj M247 narednik Jork is one of the most famous “what-if” failures in US military history. Designed in the late 1970s to protect mechanized divisions from Soviet attack helicopters and jets, it combined an M48 Patton tank chassis with twin 40mm Bofors cannons and a radar system derived from the F-16 fighter. While it looked formidable, the project was plagued by technical glitches, massive cost overruns, and embarrassing performance during live-fire trials. It was ultimately canceled in 1985 by Secretary of Defense Caspar Weinberger after only 50 units were produced.

Attribute	Technical Specification (M247)
Ulogu	Self-Propelled Anti-Aircraft Gun (SPAAG)
Posada	3 (komandant, topnik, vozač)
Glavno naoružanje	2 × 40 mm Bofors L/70 autocannons
Chassis	Modified M48A5 Patton tank hull
Radar System	Westinghouse AN/APG-66 (Pulse-Doppler)
Rate of Fire	600 rounds per minute (combined)
Motor	Continental AVDS-1790-2D V12 diesel (750 hp)
Status	Project canceled in 1985

Design Engineering: Frankenstein’s Turret

The F-16 Radar Graft: To save money, Ford Aerospace used the AN/APG-66 radar from the F-16. However, a radar designed for the sky struggled to differentiate between low-flying helicopters and ground clutter (trees, hills, and even latrine fans).
Proximity Fuzed Ammo: The Sergeant York was intended to use advanced 40mm shells that didn’t need a direct hit; they would explode near a target to shred it with shrapnel. This made the 40mm Bofors far more lethal against agile helicopters than traditional “hit-to-kill” rounds.
Chassis Mismatch: Using the aging M48 Patton chassis was a double-edged sword. It was readily available, but it was much slower than the M1 Abrams and M2 Bradley it was supposed to protect, meaning the anti-aircraft shield would have been left behind in a fast-moving armored dash.
Turret Weight: The massive armored turret was so heavy that it strained the M48’s hydraulic traverse systems, leading to slow response times when trying to track high-speed jets.

A History of Trials and Errors

The “Latrine” Incident: During a high-profile demonstration for officials, the M247’s radar reportedly locked onto a spinning exhaust fan on a nearby latrine instead of the target drone, highlighting its inability to filter out ground interference.
Target Tracking Failures: In live-fire tests, the system struggled to hit targets that were moving even slightly, and in one infamous test, it reportedly aimed its guns at the reviewing stand where the brass was sitting.
The Legacy of Failure: The M247’s cancellation left the US Army without a heavy gun-based air defense system for decades. This gap was eventually filled by the M6 Linebacker (a Bradley with Stinger missiles) and later the M-SHORAD Stryker.
Museum Pieces: Almost all M247s were used as targets on firing ranges. Only a few survive today in museums, such as the Sgt. York at the Sargeant York State Historic Park in Tennessee.