Difference between revisions of "B7A2"
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=== Flight performance === | === Flight performance === | ||
{{Specs-Avia-Flight}} | {{Specs-Avia-Flight}} | ||
| − | Designed to carry most of its payload internally, the B7A2 is much bulkier than its predecessor, the [[B6N (Family)|B6N]] series, as well as equipped with a less powerful Homare 12 engine. Thus the Ryusei is a bit slow to accelerate and somewhat sluggish at low speed, thought WEP should comes in handy as the engine can cool down relatively quickly. | + | <!-- ''Describe how the aircraft behaves in the air. Speed, manoeuvrability, acceleration and allowable loads - these are the most important characteristics of the vehicle.'' --> |
| + | Designed to carry most of its payload internally, the B7A2 is much bulkier than its predecessor, the [[B6N (Family)|B6N]] series, as well as equipped with a less powerful Homare 12 engine. Thus the Ryusei is a bit slow to accelerate and somewhat sluggish at low speed, thought the WEP should comes in handy as the engine can cool down relatively quickly. | ||
| − | Once the Ryusei reaches 300 km/h, however, its | + | Once the Ryusei reaches 300 km/h, however, its manoeuvrability is significantly increased. Between 300 and 500 km/h, the Ryusei is capable of out-turning most of the enemy fighters it faces. With a help of WEP, it barely loses any energy while turning and can keep up on the enemy's tails. |
| + | |||
| + | However, when the Ryusei's speed is above 500 km/h, the plane will slowly lose its controllability and lock up when reaches 600 km/h. This can be counterproductive for the plane's usage as a dive bomber, as it may results in a lethal failed pull-ups. Here is where your airbrakes comes into rescue, as it will help to restore the Ryusei's controllability and safely pull out from a dive. | ||
| − | |||
{| class="wikitable" style="text-align:center" width="70%" | {| class="wikitable" style="text-align:center" width="70%" | ||
! rowspan="2" | Characteristics | ! rowspan="2" | Characteristics | ||
| Line 83: | Line 85: | ||
* Fuel tanks are not self-sealing (3 in each wing) | * Fuel tanks are not self-sealing (3 in each wing) | ||
| − | + | Although the B7A2's airframe is fairly durable, the pilot and gunner is exposed to an attack from any angle except frontally due the lack of bulletproof glass and armour. As the Ryusei lacks any self-sealing fuel tank, fire damage will be a death sentence for the plane. | |
| + | |||
=== Modifications and economy === | === Modifications and economy === | ||
{{Specs-Economy}} | {{Specs-Economy}} | ||
| Line 163: | Line 166: | ||
* Common Navy plane construction: | * Common Navy plane construction: | ||
** Excellent manoeuvrability | ** Excellent manoeuvrability | ||
| − | |||
* '''{{PAGENAME}}''' specific | * '''{{PAGENAME}}''' specific | ||
** Airbrakes | ** Airbrakes | ||
| + | ** Short take-off and landing distance | ||
** 2x wing mounted [[Type 99 Model 2 (20 mm)]] | ** 2x wing mounted [[Type 99 Model 2 (20 mm)]] | ||
** 1x tail defensive [[Type 2 (13 mm)]] with good coverage | ** 1x tail defensive [[Type 2 (13 mm)]] with good coverage | ||
| Line 176: | Line 179: | ||
** Little armour, and no self-sealing fuel tanks | ** Little armour, and no self-sealing fuel tanks | ||
** Exposed tail gunner | ** Exposed tail gunner | ||
| − | * Easily compress when exceeding 600 km/h | + | * Easily compress when exceeding 600 km/h |
* Mediocre roll rate | * Mediocre roll rate | ||
== History == | == History == | ||
<!-- ''Describe the history of the creation and combat usage of the aircraft in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Vehicle-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' --> | <!-- ''Describe the history of the creation and combat usage of the aircraft in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Vehicle-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' --> | ||
| − | Two-seat carrier-based Aichi B7A2 Ryusei "Shooting Star" or "Meteor" Torpedo/Dive Bomber (Allied reporting name: Grace). The B7A was an answer to a specification for a carrier-based torpedo/dive bomber in 1941. It was intended to replace B6N and D4Y, having an internal and external payload, increased speed and long-range. Some of the design features of the B7A include; inverted gull-wings, conventional fuselage, and tail unit and a four-bladed propeller. During its development, it went through a series of shortcomings, such as the delivery of engines, and an accidental earthquake which destroyed the main factory housing most of the B7A's. Thus not seeing active service until 1944. By this time, there were no aircraft carriers capable of operating the B7A. The last aircraft carrier being the Shinano was sunk 10 days after its commission. The B7A2 was then forced to operate in home | + | Two-seat carrier-based Aichi B7A2 Ryusei "Shooting Star" or "Meteor" Torpedo/Dive Bomber (Allied reporting name: Grace). The B7A was an answer to a specification for a carrier-based torpedo/dive bomber in 1941. It was intended to replace B6N and D4Y, having an internal and external payload, increased speed and long-range. Some of the design features of the B7A include; inverted gull-wings, conventional fuselage, and tail unit and a four-bladed propeller. During its development, it went through a series of shortcomings, such as the delivery of engines, and an accidental earthquake which destroyed the main factory housing most of the B7A's. Thus not seeing active service until 1944. By this time, there were no aircraft carriers capable of operating the B7A. The last aircraft carrier being the Shinano was sunk 10 days after its commission. The B7A2 was then forced to operate in home defence operations, seeing limited service. |
Known as the AM-23 within Aichi, the first prototype was completed and flown in May 1942 which was designated the B7A1 by the Navy. The B7A used the Nakajima NK9C 12 Model radial engine, producing 1,825 hp. This gave the aircraft exceptionally good speed, even when fully loaded with ammunition and bombs. During flight testing, the Navy was very impressed with its performance. Despite it being a very large light bomber, the B7A1 displayed handling and performance comparable to the Mitsubishi's A6M Zero and a further 8 prototypes were ordered. However, with more testing underway, it was noted that the engine (which was experimental as well) suffered teething problems, and the airframe of the aircraft needed modifying structurally. It was not until two years later that the B7A would begin production in 1944. | Known as the AM-23 within Aichi, the first prototype was completed and flown in May 1942 which was designated the B7A1 by the Navy. The B7A used the Nakajima NK9C 12 Model radial engine, producing 1,825 hp. This gave the aircraft exceptionally good speed, even when fully loaded with ammunition and bombs. During flight testing, the Navy was very impressed with its performance. Despite it being a very large light bomber, the B7A1 displayed handling and performance comparable to the Mitsubishi's A6M Zero and a further 8 prototypes were ordered. However, with more testing underway, it was noted that the engine (which was experimental as well) suffered teething problems, and the airframe of the aircraft needed modifying structurally. It was not until two years later that the B7A would begin production in 1944. | ||
Revision as of 18:42, 11 October 2021
Contents
Description
The B7A2 Ryusei is a rank III Japanese bomber with a battle rating of 3.7 (AB/RB) and 4.0 (SB). It was introduced in Update 1.37.
The Allied reporting name for this aircraft was "Grace".
The B7A2 was designed as a carrier-based dive/torpedo bomber. For an aircraft of its size, it has exceptionally good manoeuvrability, on par with the A6M Zero. Therefore it can be used in the fighter role as well, since its two 20 mm cannons perform very well against all other aircraft. When using the B7A2 in either dive or torpedo bombing, it is important to not rely on the B7A2's defensive gunner if an enemy is approaching. The B7A2 can quickly outmanoeuvre most American and Soviet aircraft so use this to your advantage if you're being intercepted. You will then be able to quickly tail your enemy, and be able to engage them with your forward firing cannons. As the aircraft is seen, it is a very big target, with minimal armour. This is why it is important to not rely on your defensive gunner. In addition, the B7A2 does not have a very good climb rate, and works best at lower altitudes. Getting your guns on target can also be a pain, especially when traveling at higher speeds since the B7A2's roll rate is very poor. Most enemies are able to easily out roll the B7A2, giving them a distinct advantage in a dogfight. Nonetheless, many pilots do not expect death to come from a dive bomber.
The B7A2 wields two 20 mm Type 99 mk 2 cannons placed in the wings. Since the B7A2 can be used as a multi-purpose aircraft, the B7A2's weapons will also serve those roles. Equipping the ground targets belt for the 20 mm cannons can be helpful if attacking targets like light pillboxes or light tanks. The Ryusei is also capable of equipping the "Stealth" belt which is composed entirely of HEF and API shells. This belt is the best choice for air to air combat. The B7A2 pilot should remember to set his or her gun convergence lower than 400 meters to take down enemy fighters effectively. Since the cannons themselves are a fair ways apart from each other on the actual aircraft, having a low gun convergence ensures each round hits a single point on a target.
General info
Flight performance
Designed to carry most of its payload internally, the B7A2 is much bulkier than its predecessor, the B6N series, as well as equipped with a less powerful Homare 12 engine. Thus the Ryusei is a bit slow to accelerate and somewhat sluggish at low speed, thought the WEP should comes in handy as the engine can cool down relatively quickly.
Once the Ryusei reaches 300 km/h, however, its manoeuvrability is significantly increased. Between 300 and 500 km/h, the Ryusei is capable of out-turning most of the enemy fighters it faces. With a help of WEP, it barely loses any energy while turning and can keep up on the enemy's tails.
However, when the Ryusei's speed is above 500 km/h, the plane will slowly lose its controllability and lock up when reaches 600 km/h. This can be counterproductive for the plane's usage as a dive bomber, as it may results in a lethal failed pull-ups. Here is where your airbrakes comes into rescue, as it will help to restore the Ryusei's controllability and safely pull out from a dive.
| Characteristics | Max Speed (km/h at 6,550 m) |
Max altitude (metres) |
Turn time (seconds) |
Rate of climb (metres/second) |
Take-off run (metres) | |||
|---|---|---|---|---|---|---|---|---|
| AB | RB | AB | RB | AB | RB | |||
| Stock | 542 | 525 | 8260 | 28.8 | 29.6 | 7.3 | 7.3 | 270 |
| Upgraded | 594 | 565 | 26.7 | 28.0 | 17.7 | 10.4 | ||
Details
| Features | ||||
|---|---|---|---|---|
| Combat flaps | Take-off flaps | Landing flaps | Air brakes | Arrestor gear |
| ✓ | ✓ | ✓ | ✓ | ✓ |
| Limits | ||||||
|---|---|---|---|---|---|---|
| Wings (km/h) | Gear (km/h) | Flaps (km/h) | Max Static G | |||
| Combat | Take-off | Landing | + | - | ||
| 0 | 350 | 457 | 428 | 280 | ~15 | ~15 |
| Optimal velocities (km/h) | |||
|---|---|---|---|
| Ailerons | Rudder | Elevators | Radiator |
| < 380 | < 380 | < 450 | > 312 |
Survivability and armour
- 13 mm steel plate in the nose
- Fuel tanks are not self-sealing (3 in each wing)
Although the B7A2's airframe is fairly durable, the pilot and gunner is exposed to an attack from any angle except frontally due the lack of bulletproof glass and armour. As the Ryusei lacks any self-sealing fuel tank, fire damage will be a death sentence for the plane.
Modifications and economy
| Flight performance | Survivability | Weaponry | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
Since the B7A2 is a multi-role aircraft any module research path is viable. Unlocking performance modules will boost survivability and damage potential in dogfights, whereas unlocking armament modules will help with the ground attack. Some of the best modules to unlock are the "Engine injection" and "Offensive 20 mm belts".
Armaments
Offensive armament
The B7A2 is armed with:
- 2 x 20 mm Type 99 Model 2 cannons, wing-mounted (200 rpg = 400 total)
Suspended armament
The B7A2 can be outfitted with the following ordnance:
- 10 x 60 kg Navy Type 97 Number 6 bombs (600 kg total)
- 2 x 250 kg Navy Type 98 Number 25 bombs + 4 x 60 kg Navy Type 97 Number 6 bombs (740 kg total)
- 1 x 800 kg Navy Type Number 80 Model 1 bomb (800 kg total)
- 1 x 850 kg Type 91 Model 3 torpedo
Defensive armament
The B7A2 is defended by:
- 1 x 13 mm Type 2 machine gun, dorsal turret (1,000 rpg)
Usage in battles
The Ryusei is best utilized as a multi-role aircraft, similar to the role the Ju 87 D-5 plays. Once its payload is dropped, the B7A2 becomes a low altitude, low-speed dogfighter similar to an A6M. In realistic battles, the B7A2 is often paired with aircraft such as the A6M3, A6M3 mod. 22, and A6M3 mod. 22Ko. If unable to shake an enemy off your tail, these "Zeroes" can be relied on as they have impressive low altitude capabilities.
Payload choice is dependent on target choice. If the target is a light pillbox, for instance, one does not need an 800 kg bomb. Instead, equip either of the other bomb loadout options. The same goes for most ground units, apart from arcade mini bases. The Ryusei is similar to aircraft such as the Ki-49-IIa in that it can "hover" above an enemy base or airfield, rapidly dropping its payload and diving up to altitude again. Since the B7A2 is a dive bomber, it does not have to be level to drop its payload accurately. The Ryusei's ability to "hover" above enemy mini bases and airfields can be a great help to any arcade battles team. Upgrading the crew reload speed makes this aircraft a potential game-winner, especially when in a squad.
Similar to the Ju 87 D-5, the Ryusei's airspeed is not on par with the aircraft it faces, no matter the game mode. This handicaps the B7A2 to playing solely a support role, only being able to engage the aircraft it can catch. Nonetheless, having a B7A2 on any team, no matter the game mode, never hurts.
Manual Engine Control
| MEC elements | ||||||
|---|---|---|---|---|---|---|
| Mixer | Pitch | Radiator | Supercharger | Turbocharger | ||
| Oil | Water | Type | ||||
| Controllable | Controllable Not auto controlled |
Controllable Auto control available |
Controllable Auto control available |
Separate | Controllable 2 gears |
Not controllable |
Pros and cons
Pros:
- B7A for Carrier-based torpedo bomber
- Bomber spawn
- 1x Type 91 Aerial Torpedo
- Torpedo has the highest drop speed in the game at 580 km/h and is one of the most feared torpedoes in Naval Battles
- 10x Type 97 No.6 Land Bomb (60kg)
- Gets a bomb bay of 6 x 60 kg bombs which can be used to hit multiple targets (+4 on the wings that drop in pairs)
- 1x No.80 Land Bomb (800kg)
- Heaviest bomb Japanese Navy can offer
- Common Navy plane construction:
- Excellent manoeuvrability
- B7A2 specific
- Airbrakes
- Short take-off and landing distance
- 2x wing mounted Type 99 Model 2 (20 mm)
- 1x tail defensive Type 2 (13 mm) with good coverage
Cons:
- B7A for Carrier-based torpedo bomber
- Relatively Large target
- Common Navy plane construction:
- Little armour, and no self-sealing fuel tanks
- Exposed tail gunner
- Easily compress when exceeding 600 km/h
- Mediocre roll rate
History
Two-seat carrier-based Aichi B7A2 Ryusei "Shooting Star" or "Meteor" Torpedo/Dive Bomber (Allied reporting name: Grace). The B7A was an answer to a specification for a carrier-based torpedo/dive bomber in 1941. It was intended to replace B6N and D4Y, having an internal and external payload, increased speed and long-range. Some of the design features of the B7A include; inverted gull-wings, conventional fuselage, and tail unit and a four-bladed propeller. During its development, it went through a series of shortcomings, such as the delivery of engines, and an accidental earthquake which destroyed the main factory housing most of the B7A's. Thus not seeing active service until 1944. By this time, there were no aircraft carriers capable of operating the B7A. The last aircraft carrier being the Shinano was sunk 10 days after its commission. The B7A2 was then forced to operate in home defence operations, seeing limited service.
Known as the AM-23 within Aichi, the first prototype was completed and flown in May 1942 which was designated the B7A1 by the Navy. The B7A used the Nakajima NK9C 12 Model radial engine, producing 1,825 hp. This gave the aircraft exceptionally good speed, even when fully loaded with ammunition and bombs. During flight testing, the Navy was very impressed with its performance. Despite it being a very large light bomber, the B7A1 displayed handling and performance comparable to the Mitsubishi's A6M Zero and a further 8 prototypes were ordered. However, with more testing underway, it was noted that the engine (which was experimental as well) suffered teething problems, and the airframe of the aircraft needed modifying structurally. It was not until two years later that the B7A would begin production in 1944.
Up until May 1945, 80 B7A2's had been completed. But soon after, a severe earthquake occurred, destroying the factory housing the aircraft that were being assembled. A further 25 more examples were completed by another factory. Throughout the B7A2's service, different variants were planned. Firstly, was an experimental production B7A2, that was fitted with the Nakajima Homare 23 radial engine, producing 2,000 hp. Only 1 was built. Secondly, came the B7A3 Ryusei-Kai. This was to use the Mitsubishi Ha-43 radial engine producing 2,200 hp but it was not built. Lastly, came the B8A1 Mokusei "Planet". This was to have no carrier equipment and no gull wings. In addition, 2 x Type 99 20mm cannons were to be replaced with 2 x Type 5 30mm cannons. The B8A remained on the drawing board before the war ended, with no mock-up even though it was accepted to be built.
In all, 9 B7A1's, and 105 B7A2's were produced. 114 in total.
Katori Naval Air Base, Chiba-Prefecture, Japan, May 1945
- 752nd Naval Air Group
Kanogawa-Prefecture, Japan, April 1945
- Yokosuka Naval Air Group
Media
- Skins
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 aircraft;
- links to approximate analogues of other nations and research trees.
External links
- Official data sheet - more details about the performance
- [aviastar.org] Aichi B7A Ryusei / Grace
- [MilitaryFactory.com] Aichi B7A Ryusei (Grace)
- [Smithsonian NASM] Aichi B7A2 Ryusei (Shooting Star) GRACE
- [HyperScale.com] Aichi B7A2 Ryusei Kai "Grace"
- [HyperScale.com] Aichi B7A2 Ryusei Kai (Grace)
| Aichi Aircraft Company, Limited (愛知航空機株式会社) | |
|---|---|
| Bombers | D3A1 |
| B7A2 · B7A2 (Homare 23) | |
| Recon | E13A1 |
| Japan bombers | |
|---|---|
| Navy | |
| Carrier-based attack bomber | |
| B5N | B5N2 |
| B6N | B6N1 · B6N2 · B6N2a |
| B7A | B7A2 · B7A2 (Homare 23) |
| Carrier-based dive bomber | |
| D3A | D3A1 |
| D4Y | D4Y1 · D4Y2 · D4Y3 Ko |
| Shipboard Observation seaplane | |
| F1M | F1M2 |
| Land-based Attack bomber | |
| G4M | G4M1 |
| G5N | G5N1 |
| G8N | G8N1 |
| Flying boat | |
| H6K | H6K4 |
| H8K | H8K2 · H8K3 |
| Land-based Bomber | |
| P1Y | P1Y1 |
| Army | |
| Light | Ki-32 |
| Ki-48-II otsu | |
| Heavy | Ki-21-Ia · Ki-21-I hei |
| Ki-49-I · Ki-49-IIa · Ki-49-IIb · Ki-49-IIb/L | |
| Ki-67-I Ko · Ki-67-I otsu | |
| Other countries | ▅B-17E |
