View source for Mansyū Ki-98

{{Short description|Japanese ground-attack aircraft}}
<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. -->
{| {{Infobox Aircraft Begin
  |name = Ki-98 
  |image = 
  |caption = 
}}{{Infobox Aircraft Type
  |type = [[Ground-attack aircraft]]
  |manufacturer = [[Manchuria Airplane Manufacturing Company]]
  |national origin=Japan
  |designer =
  |first flight = 
  |introduced = 
  |retired = 
  |status = 
  |primary user = [[Imperial Japanese Army Air Force]] (intended)
  |more users = 
  |produced =
  |number built = 1 (destroyed before completion)<ref name="Dyer">{{cite book|last=Dyer|first=Edwin M. III|title=Japanese Secret Projects:Experimental aircraft of the IJA and IJN 1939–1945|publisher=Midland publishing|location=Hinkley|year=2009|edition=1st|pages=24–25|isbn=978-1-85780-317-4}}</ref>
  |unit cost =
  |variants with their own articles = 
  |developed into = 
}}
|}
The '''Mansyū Ki-98''', (also written as '''Manshū Ki-98'''),<ref name="Dyer"/> was a  Japanese [[ground-attack aircraft]] proposed by [[Mansyū]] (''Manshūkoku Hikōki K.K.'' - [[Manchuria Airplane Manufacturing Company]] Ltd.) during [[World War II]] for use by the [[Imperial Japanese Army Air Force]]. The still unassembled components of the first prototype were deliberately destroyed before [[Japan]] surrendered.

==Design and development==
By late 1942, the Imperial Japanese Army Air Force issued requirements for new combat aircraft, including a ground attack aircraft. [[Kawasaki Aircraft Industries|Kawasaki]] proposed the [[Kawasaki Ki-102]] and Mansyū the Ki-98. The Ki-98 was to have been a single-seat, twin-boom, low-wing monoplane with a central [[nacelle]] housing both the [[cockpit]] and a [[Turbosupercharger|turbosupercharged]] 1,643-kilowatt (2,200-hp) [[Mitsubishi Ha-43|Mitsubishi Ha-211 Ru]] [[radial engine]] behind the pilot driving a four-bladed [[Pusher configuration|pusher]] propeller rotating between the booms.<ref name="Francillon486">Francillon, p. 486.</ref> The underslung booms extended aft from slightly forward of the leading edge of the wing with ovoid fins supporting the tailplane and elevator between them.<ref name="Francillon486" /> The aircraft had a retractable tricycle [[landing gear]], [[bubble canopy]], and an armament of one 37-mm and two 20-mm cannon mounted in the nose.<ref name="Francillon486" /> Entry to the cockpit was to have been through a door in the nose undercarriage bay.

In the spring of 1944, the Army Air Force instructed Mansyū to adapt the design as a high-altitude fighter. The major change being the engine, substituting the turbocharged Mitsubishi Ha-211 Ru for the original [[Mitsubishi Ha-43|Ha-211 III]]. The increased bulk of the new engine requiring the fuselage to be enlarged and the larger diameter propeller necessitated moving the booms outboard.<ref name="Dyer"/>

Construction of the first prototype was delayed by bombing raids on the [[Harbin]] factory till January 1945. Components for the first prototype was still under construction and hadn't been assembled when the [[Soviet Union]] invaded Manchuria in August 1945; the [[Manchukuo Imperial Army]] ordered all documentation and material to be destroyed to prevent capture by Soviet forces, bringing the Ki-98 project to an end.<ref name="Dyer"/>

==Specifications (Ki-98 estimated)==
{{Aircraft specs
|ref=Japanese Secret Projects:Experimental aircraft of the IJA and IJN 1939–1945<ref name="Dyer" /><!-- reference -->
|prime units?=met<!-- imp or kts first for US aircraft, and UK aircraft pre-metrification, 
met(ric) first for all others. You MUST choose a format, or no specifications will show -->
<!--
        General characteristics
-->
|crew=1
|length m=11.4
|span m=11.26
|height m=4.29
|wing area sqm=23.99
|empty weight kg=3,500
|gross weight kg=4,500
<!--
        Powerplant
-->
|eng1 number=1
|eng1 name=[[Mitsubishi Ha-43|Mitsubishi Ha-211 Ru]]
|eng1 type=18-cyl. fan assisted air-cooled radial engine
|eng1 hp=2,200<!-- prop engines -->
|eng1 note= for take-off<br/>
**{{convert|1,461.6|kW|hp|abbr=on|0}} at {{convert|2,000|m|ft|abbr=on|0}}
**{{convert|1,305|kW|hp|abbr=on|0}} at {{convert|8,500|m|ft|abbr=on|0}}

|prop blade number=4<!-- propeller aircraft -->
|prop name=metal constant speed pusher propeller driven by a {{convert|2|m|ft|abbr=on|0}} long extension shaft
|prop dia m=3.6<!-- propeller aircraft -->

<!--
        Performance
-->
|max speed kmh=730
|max speed note=at {{convert|10,000|m|ft|abbr=on|0}}
|range km=1,249
|endurance=2 hours 15 minutes at {{convert|499|km/h|mph|abbr=on|0}}
|ceiling m=10,000
|climb rate ms=15.15
|time to altitude=<br/>
**{{convert|5,000|m|ft|abbr=on|0}} in 5 minutes 30 seconds
|wing loading kg/m2=187.5
|power/mass=0.5 kW/kg (0.3 hp/lb)
;
<!--
        Armament
-->
|guns=<br/>
* 1× [[Ho-204 cannon|Ho-204]] 37-mm cannon
* 2× [[Ho-5 cannon|Ho-5]] 20-mm cannon
}}

==See also==
{{aircontent
<!-- |related= -->
|similar aircraft=
* {{lwc|De Schelde S.21}}
* {{lwc|Lockheed P-38 Lightning}}
* {{lwc|Mitsubishi J4M}}
* {{lwc|SAAB 21}}
* {{lwc|Tachikawa Ki-94|Tachikawa Ki-94-I}}
* {{lwc|Vultee XP-54}}
|lists=
* [[List of military aircraft of Japan]]
* [[List of pusher aircraft by configuration]]
|see also=
* [[Twin-boom aircraft]]
}}

==References==

===Notes===
{{reflist}}

===Bibliography===
{{refbegin}}
* Francillon, René J. ''Japanese Aircraft of the Pacific War''. Annapolis, Maryland: Naval Institute Press, 1979. {{ISBN|0-87021-313-X}}.
*{{cite book|last=Dyer|first=Edwin M. III|title=Japanese Secret Projects:Experimental aircraft of the IJA and IJN 1939–1945|publisher=Midland publishing|location=Hinkley|year=2009|edition=1st|pages=24–25|isbn=978-1-85780-317-4}}
{{refend}}

===External links===
*[http://www.j-aircraft.com/artwork/peter_allen/5.jpg Artist's impression] at j-aircraft.com
*[https://beyazgazete.com/haber/2021/4/5/yerli-bitkisel-tibbi-urunler-avrupa-yolunda-6037173.html Erdal Can Alkoçlar]
{{Mansyu aircraft}}
{{Japanese Army Aircraft Designation System}}

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{{DEFAULTSORT:Mansyu Ki-98}}
[[Category:1940s Japanese attack aircraft|Ki-98, Mansyu]]
[[Category:Mansyū aircraft|Ki-98]]
[[Category:World War II Japanese ground attack aircraft|Ki-98, Mansyu]]
[[Category:Abandoned military aircraft projects of Japan|Ki-98, Mansyu]]
[[Category:Single-engined pusher aircraft]]
[[Category:Aircraft with retractable tricycle landing gear]]