M247
Contents
Description
The Gun, Air Defence Artillery, Self-Propelled, 40-mm, M247 is a Rank VI American self-propelled anti-aircraft gun with a battle rating of 9.0 (AB/RB/SB). It was introduced in Update 1.81 "The Valkyries".
General info
Survivability and armour
Armour type:
- Cast homogeneous armour (Hull)
- Rolled homogeneous armour (Rear (low), Roof, Turret)
| Armour | Front (Slope angle) | Sides | Rear | Roof |
|---|---|---|---|---|
| Hull | 85-200 mm (59-74°) Front glacis 63-200 mm (13-60°) Lower glacis |
76 mm (8-43°) Front 51 mm (0-43°) Rear |
35 mm (26-32°) Top 25 mm (61-62°) Bottom |
57 mm |
| Turret | 25.4 mm (15-76°) Turret front (Upper) 12.7 mm (40-69°) Turret front (Lower) 25.4 mm (0-87°) Gun mantlet |
12.7-25.4 mm (0-19°) Upper 12.7 mm (40-69°) Lower |
12.7 mm (18°) | 12.7 mm |
Notes:
- Suspension wheels and tracks are 20 mm thick.
- Belly armour is 38 mm in the front and 25 mm in the rear.
Mobility
| Game Mode | Mobility characteristics | Engine power (horsepower) | Power-to-weight ratio (hp/ton) | ||||
|---|---|---|---|---|---|---|---|
| Max Speed | Weight | AoA Weight | Stock | Upgraded | Stock | Upgraded | |
| Arcade | 52 | 49.3 | N/A | 1065 | ____ | 21.60 | __.__ |
| Realistic | 48 | 663 | 750 | 13.45 | 15.21 | ||
The M247's turret is installed on the hull of an M48 medium tank, because of this they have roughly similar mobility. The M247 is about 3 tons heavier than the M48A1 (49.3 tons vs. 46.4 tons), and has a slightly weaker engine, which translates into a slightly more sluggish machine compared to the M48A1. The M48A1 has a max engine power of 810 hp, while the M247's engine power is 750 hp. For a vehicle this heavy, it has fairly good mobility. When spaded, it can comfortably hit a top speed of 45 km/h on flat terrain, while in cross-country you will have a top speed of around 25 km/h. While going backwards, the top speed is somewhat less impressive: about -9 km/h.
Armaments
| 40 mm M266 Automatic Cannon (x2) | |||||
|---|---|---|---|---|---|
| Capacity (Belt capacity each) | Fire rate (shots/minute) |
Vertical guidance |
Horizontal guidance | ||
| 560 (280) | 300 | -5°/+85° | ±180° | ||
| Turret rotation speed (°/s) | |||||
| Mode | Stock | Upgraded | Prior + Full crew | Prior + Expert qualif. | Prior + Ace qualif. |
| Arcade | 52.8 | ? | ? | ? | ? |
| Realistic | 35.7 | ? | ? | ? | ? |
| Reloading rate (seconds) | |||||
| Stock | Prior + Full crew | Prior + Expert qualif. | Prior + Ace qualif. | ||
| 6.5 | ? | ? | ? | ||
Ammunition
| Penetration statistics | |||||||
|---|---|---|---|---|---|---|---|
| Ammunition | Type of warhead |
Penetration in mm @ 90° | |||||
| 10m | 100m | 500m | 1000m | 1500m | 2000m | ||
| M811 | HEFI-T* | 5 | 5 | 5 | 5 | 5 | 5 |
| M822 | HEFI-T* | 5 | 5 | 5 | 5 | 5 | 5 |
| 40 mm AP-T | AP-T | 93 | 90 | 77 | 62 | 51 | 41 |
| Shell details | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Ammunition | Type of warhead |
Velocity in m/s |
Projectile Mass in kg |
Fuse delay
in m: |
Fuse sensitivity
in mm: |
Explosive Mass in g (TNT equivalent): |
Normalization At 30° from horizontal: |
Ricochet: | ||
| 0% | 50% | 100% | ||||||||
| M811 | HEFI-T* | 1100 | 0.87 | 0.2 | 0.1 | 255 | +0° | 79° | 80° | 81° |
| M822 | HEFI-T* | 1100 | 0.87 | 0.2 | 0.1 | 185 | +0° | 79° | 80° | 81° |
| 40 mm AP-T | AP-T | 1030 | 0.88 | N/A | N/A | N/A | -1° | 48° | 69° | 79° |
Belt types
| Belts | Shell composition | Combat usage |
| Default | HEFI-T* / AP-T | These work fine, a hit on an aircraft means instant disassembly for it and still is able to hurt ground vehicles, especially if it is side into the side of a enemy tank. These seem like a good I don't know what i will run into belt. |
| 40 mm AP-T | AP-T / AP-T / AP-T / HEFI-T* | Very powerful ammunition against ground targets with significantly more penetration than other 35-40 mm AP-T projectiles. Will easily destroy any target with side shots even outside point blank range, and can destroy lighter targets and weak spots from the front even against MBTs. |
| M811 | HEFI-T* / HEFI-T* / HEFI-T* / AP-T | "Poor man's anti-air ammunition." Unlike the M822 shells these require direct hits to do damage, but if you experience problems with M822 detonating too early this belt may be your best choice. |
| M822 | HEFI-T* / HEFI-T* / AP-T | Proximity-fused shells that absolutely obliterate anything flying, when they work. Somewhat unreliable in if they detonate within range of the target, but when they do the target will be quickly torn apart. The only ammunition for self-propelled anti-aircraft guns that lets you hit planes and helicopters even with near misses. Should be your go-to anti-air ammunition, if it works reliably for you. |
Usage in battles
Describe the tactics of playing in the vehicle, the features of using vehicles in the team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view but give the reader food for thought. Describe the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).
Pros and cons
Pros:
- Twin 40mm M266 cannon (L/70 40mm Bofors) have a much higher rate of fire compared to the M42 Duster
- Large ammunition count ensures that you will have plenty to fire throughout a match without fear of running out of ammo mid-game
- Has access to 12x 66 mm smoke grenades if you find the need to escape a dangerous situation
- The M822 ammunition is proximity fused, and will detonate if the projectile passes close enough to the target
- The 40mm's pose a serious threat to lightly-armoured vehicles
- Uses the M48 Patton's hull (armour included) = one of the best-protected SPAA in the game
- Benefits in RB from aim-assistance thanks to the radar
- Has access to NVD for use in night battles
- Large radar sweep range to easily spot targets, as well as a large radar lock-on marker in its scope
Cons:
- As with all high-rank SPAA, the M247 has very thin turret armour; a shell strike could instantly end the vehicle
- Turret is also vulnerable to strafing aircraft + rockets
- Armour advantages are nullified due to the inclusion of the Hull Break mechanic
- No thermal sights
History
Describe the history of the creation and combat usage of the ground vehicle in more detail than in the introduction. If the historical reference turns out to be too big, take it to a separate article, taking a link to an article about the vehicle and adding a block "/ History" (example: https://wiki.warthunder.com/(Vehicle-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref>, as well as adding them at the end of the article.
Media
Skins and camouflages for the M247 Sergeant York from live.warthunder.com.
See also
Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:
- reference to the series of the vehicles;
- links to approximate analogues of other nations and research trees.
External links
| USA anti-aircraft vehicles | |
|---|---|
| M3 Half-track derivatives | M13 MGMC · M15 CGMC · M16 MGMC |
| M24 derivative | M19A1 |
| M41 derivative | M42 |
| Radar SPAAG | M163 · M247 |
| Missile SPAA | ADATS · Imp.Chaparral · LAV-AD · XM975 |
