Ho-155 (30 mm) - Revision history

U38088265: /* Available ammunition */ Updated

2024-03-14T19:37:09Z

‎Available ammunition: Updated

U38088265: /* Available ammunition */ Updated

2023-09-19T15:14:52Z

‎Available ammunition: Updated

U38088265: /* Available ammunition */ Converted to transclusion

2023-07-04T13:25:00Z

‎Available ammunition: Converted to transclusion

U44629479: Edits

2022-10-06T20:07:02Z

Edits

U44280144: /* Pros and cons */

2022-10-05T09:25:07Z

‎Pros and cons

U38088265: /* Available ammunition */

2022-09-19T09:29:45Z

‎Available ammunition

U17577377: /* Available ammunition */

2022-09-18T12:23:53Z

‎Available ammunition

U38088265: /* History */

2022-09-18T08:51:45Z

‎History

U137319744: /* History */ Added history

2022-09-17T16:58:42Z

‎History: Added history

U3312106: /* Available ammunition */ Added another table

2021-03-18T15:28:50Z

‎Available ammunition: Added another table

@@ Line 17: / Line 17: @@
 <!-- ''Describe the shells that are available for the weapon and their features and purpose. If it concerns autocannons or machine guns, write about different ammo belts and what is inside (which types of shells).'' -->
-* '''Default:''' {{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|HEF-I|High-explosive fragmentation incendiary}}{{-}}{{Annotation|HEF-T|High-explosive fragmentation tracer}}
+* '''Default:''' {{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|HEF-I|High-explosive fragmentation incendiary}}
-* '''Universal:''' {{Annotation|HEF-T|High-explosive fragmentation tracer}}{{-}}{{Annotation|HEF-I|High-explosive fragmentation incendiary}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}
+* '''Universal:''' {{Annotation|HEF-I|High-explosive fragmentation incendiary}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}
-* '''Ground targets:''' {{Annotation|HEF-T|High-explosive fragmentation tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}
+* '''Ground targets:''' {{Annotation|HEF-I|High-explosive fragmentation incendiary}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}
-* '''Tracers:''' {{Annotation|HEF-T|High-explosive fragmentation tracer}}
+* '''Tracers:''' {{Annotation|AP-T|Armour-piercing tracer}}
-* '''Stealth:''' {{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}
+* '''Stealth:''' {{Annotation|HEF|High-explosive fragmentation}}
-{{:{{PAGENAME}}/Ammunition|HEF-T, HEF-I, HEF, AP-T}}
+{{:{{PAGENAME}}/Ammunition|HEF-I, AP-T, HEF}}
 === Comparison with analogues ===

@@ Line 16: / Line 16: @@
 === Available ammunition ===
 <!-- ''Describe the shells that are available for the weapon and their features and purpose. If it concerns autocannons or machine guns, write about different ammo belts and what is inside (which types of shells).'' -->
-When flying on a newer-type air map, AI ground targets that have detailed vehicle models have reduced armour and can be killed with HE, allowing the pilot to take the full HEF-T belt without wasting any precious ammo count on Practice shells.
+* '''Default:''' {{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|HEF-I|High-explosive fragmentation incendiary}}{{-}}{{Annotation|HEF-T|High-explosive fragmentation tracer}}
+* '''Universal:''' {{Annotation|HEF-T|High-explosive fragmentation tracer}}{{-}}{{Annotation|HEF-I|High-explosive fragmentation incendiary}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}
-* '''Default:''' {{Annotation|P|Practice}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF-I|High-explosive fragmentation incendiary}}{{-}}{{Annotation|HEF-T|High-explosive fragmentation tracer}}
+* '''Ground targets:''' {{Annotation|HEF-T|High-explosive fragmentation tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}{{-}}{{Annotation|AP-T|Armour-piercing tracer}}
 * '''Tracers:''' {{Annotation|HEF-T|High-explosive fragmentation tracer}}
-* '''Stealth:''' {{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|P|Practice}}
+* '''Stealth:''' {{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}
-{{:{{PAGENAME}}/Ammunition|HEF-T, P, HEF-I, HEF, PT}}
+{{:{{PAGENAME}}/Ammunition|HEF-T, HEF-I, HEF, AP-T}}
 === Comparison with analogues ===
@@ Line 39: / Line 36: @@
 '''Pros:'''
-* Tracers belt is made of HEF-T rounds only (with 59 g TNTeq)
 '''Cons:'''

@@ Line 26: / Line 26: @@
 * '''Stealth:''' {{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|P|Practice}}
-{| class="wikitable sortable" style="text-align:center" width="100%"
+{{:{{PAGENAME}}/Ammunition|HEF-T, P, HEF-I, HEF, PT}}
 === Comparison with analogues ===

@@ Line 81: / Line 81: @@
 '''Pros:'''
-* tracer-Belt is HEF-T only (fast bullets with 59g explosives)
+* Tracers belt is made of HEF-T rounds only (with 59 g TNTeq)
 '''Cons:'''
@@ Line 96: / Line 96: @@
 == 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 article about the variant of the cannon/machine gun;''
 * ''references to approximate analogues by other nations and research trees.''
@@ Line 102: / Line 101: @@
 == External links ==
 ''Paste links to sources and external resources, such as:''
 * ''topic on the official game forum;''
 * ''other literature.''

@@ Line 81: / Line 81: @@
 '''Pros:'''
+* tracer-Belt is HEF-T only (fast bullets with 59g explosives)
 '''Cons:'''

@@ Line 16: / Line 16: @@
 === Available ammunition ===
 <!-- ''Describe the shells that are available for the weapon and their features and purpose. If it concerns autocannons or machine guns, write about different ammo belts and what is inside (which types of shells).'' -->
-Only the practice shells offer any kind of penetration of 20mm up to 500m but lack any damage to be used as a ground attack warrant. It is best advised to use a full tracer belt as the HEF-T offers the most explosive mass and is a single shell-type belt.
+Only the practice shells offer any kind of penetration of 20 mm up to 500 m, but they lack the post-penetration damage to be used for ground attack. It is best advised to use a full tracer belt as the HEF-T offers the most explosive mass and is a single shell-type belt.
-When flying on a newer-type air map, AI ground targets that have playable vehicle models, have reduced armour and can be killed with HE, allowing the pilot to take full HEF-T belt without wasting any precious ammo count on Practice shells.
+When flying on a newer-type air map, AI ground targets that have detailed vehicle models have reduced armour and can be killed with HE, allowing the pilot to take the full HEF-T belt without wasting any precious ammo count on Practice shells.
 * '''Default:''' {{Annotation|P|Practice}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF-I|High-explosive fragmentation incendiary}}{{-}}{{Annotation|HEF-T|High-explosive fragmentation tracer}}
@@ Line 45: / Line 45: @@
 |-
 |}
+{| class="wikitable sortable" style="text-align:center" width="100%"
-{| class="wikitable" style="text-align:center" width="100%"
+! colspan="9" | Shell details
 |-
 ! rowspan="2" data-sort-type="text" | Ammunition
 ! rowspan="2" | Velocity<br>(m/s)
-! rowspan="2" | Projectile<br>Mass (kg)
+! rowspan="2" | Projectile<br>mass (kg)
 ! rowspan="2" | Fuse delay<br>(m)
 ! rowspan="2" | Fuse sensitivity<br>(mm)
-! rowspan="2" | Explosive Mass<br>(TNT equivalent) (g)
+! rowspan="2" | Explosive mass<br>(TNT equivalent) (g)
 ! colspan="3" | Ricochet
 |-
 ! 0% !! 50% !! 100%
 |-
-| Tracers || HEF-T || 920 || 0.33 || 0.5 || 0.1 || 59.5 || 79° || 80° || 81°
+| HEF-T || 920 || 0.33 || 0.5 || 0.1 || 59.5 || 79° || 80° || 81°
 |-
-| Universal || HEF-I || 710 || 0.35 || 0.5 || 0.3 || 35 || 79° || 80° || 81°
+| HEF-I || 710 || 0.35 || 0.5 || 0.3 || 35 || 79° || 80° || 81°
 |-
-| Stealth || HEF || 710 || 0.35 || 1.1 || 0.8 || 35 || 79° || 80° || 81°
+| HEF || 710 || 0.35 || 1.1 || 0.8 || 35 || 79° || 80° || 81°
 |-
-| Practice || P || 920 || 0.33 || N/A || N/A || N/A || 47° || 56° || 65°
+| P || 920 || 0.33 || N/A || N/A || N/A || 47° || 56° || 65°
 |-
-| Practice || PT || 920 || 0.33 || N/A || N/A || N/A || 47° || 56° || 65°
+| PT || 920 || 0.33 || N/A || N/A || N/A || 47° || 56° || 65°
 |-
 |}

@@ Line 79: / Line 79: @@
 == History ==
-By early 1942, The Imperial Japanese Army Air Service recognized that their newly introduced [[Ki-43 (Family)|Ki-43]] fighter aircraft lacked the firepower needed to engage enemy aircraft with only two [[Ho-103 (12.7 mm)]] machine guns to use. Nakajima's replacement design, the [[Ki-84 ko]] increased the firepower by supplementing the Ho-103 with 2 [[Ho-5 (20 mm)]] cannons. However, the same year, the Third Army Aerotechnical Laboratory at Tachikawa, under the leadership of Chuo Kogyo K. K., developed a 25x155mm variant of the Ho-5 to replace it. Designated the Ho-51, this gun was intended to fit in the same mounts of the Ho-5 it was intended to replace, but in early 1943, the decision was made to scale the design up to fire a 30x115mm shell that held 2.25 times the explosive power of a Ho-5 shell. Unusually for a recoil-operation design, the Ho-155 prototype had both the "ice cream cone" muzzle break of the Ho-5 and a forward extension to support the heavier barrel, while still keeping the same receiver as the Ho-51. However, the weight and reliability issues from the recycled receiver made it a undesirable replacement for the Ho-5, so the Nagoya Army Arsenal went to work making the gun a feasible replacement. From 1943-1944,  Nagoya made the Ho-155-I prototype which could successfully handle the 30mm cartridge but was once again too large for aircraft. By 1945, they had their second prototype, the Ho-155-II which was capable of fitting into the wing bays of the Ki-84 and was tested. The Ho-155 was also planned for the [[Ki-102 otsu]] and the Ki-201 fighter jet, the latter of which never left the drawing board. If the Ho-155 ever saw service is unknown but it is unlikely given the state of Japanese industry thanks to the Allies strategic bombing campaign.
+<!-- ''Examine the history of the creation and combat usage of the weapon 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 weapon and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Weapon-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>.'' -->
 == Media ==

@@ Line 40: / Line 40: @@
 |-
 | Stealth || 23 || 22 || 19 || 14 || 7 || 3
 |-
 |}