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Author Topic: Kawanishi 17-shi Land Bomber (K-100)  (Read 8097 times)

Offline T-50

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Kawanishi 17-shi Land Bomber (K-100)
« on: March 25, 2009, 01:24:18 pm »
 Hello folks im looking for the Kawanishi K-100 bomber, it was an competitor to the projected G7M
 bomber.
 Im looking for drawnings or artist inpressions of this aircraft
 cheers T-50
« Last Edit: July 06, 2016, 01:49:37 am by Skyblazer »

Offline Hikoki1946

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Re: Kawanishi 17-shi Land Bomber (K-100)
« Reply #1 on: March 26, 2009, 10:11:56 am »
Another site, http://www.ww2aircraft.net/forum/aviation/4-engine-japanese-heavy-bomber-4388.html, described the K-100 as:

"Another contender for a high-speed long-range bomber that was fulfilled by the G8M1 “Rita” was a Kawanishi proposal- the K-100 (Type17). This thing was small like the Mitsubishi Type 17 with a crew of four in a short 50-foot fuselage. Four Nakajima Mamoru-Kai 18-cylinder radials each with 2,300 HP mounted on the 75-foot wings. Weighing just 30,000 lbs. loaded this thing could scream with a 376 MPH top speed and cruised at 230 MPH for 3,450 miles range. A ceiling of 30,732 feet was projected. Armament was just three 20 mm cannon a 1,760-lb. torpedo or bob of the same weight."

I doubt the validity of this given the same poster said the G7M1 was a four-engine design. The K-100 was a twin-engine bomber as it was the competitor of the G7M and was canned later so it couldn't have been a competing design against the G8M.


Offline blackkite

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Re: Kawanishi 17-shi Land Bomber (K-100)
« Reply #2 on: September 17, 2012, 07:15:48 pm »
Hi Kawanishi K100.
K100 did not have G number. Estimeted performance was excellent as follows. Detail design began at the day, but Mamori-kai(護-改) engine cancelled.
Span : 21.60m, Length : 15.00m, Height : 6.07m, Wing area : 64.0sqm, Aspect ratio : 7.3, Dihedral 0°(central wing)/5°(outer wing), Sweep back angle : 30°!?, Empty weight : 8,550kg, Gross weight : 13,500kg~16,000kg
Engine : Nakajima Mamori-kai aircooling 18 cylinders ×2, Take off power : 2,300hp(each), propeller : metal constant speed 4 blades,  diameter : 4.50m, Fuel : 12,800L, Oil : 240L, Maximum speed : 327kt(606km/h)/7,600m, Landing speed : 78kt(145km/h), Climb to 4,000m~6′16″, Service ceiling : 11,200m, Range : 3,000nm(5,556km)/at cruising speed 200kt(370km/h), Armaments : 20mm×3, Torpedo 800kg×1, Crew : 4(inline position)
Source : ENCYCLOPEDIA OF JAPANESE AIRCRAFT 1900-1945 VOL.3 KAWANISHI/HIROSHO CONTENTS
Tail turret was remote controlled?
« Last Edit: September 18, 2012, 01:47:06 am by blackkite »

Offline airman

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Re: Kawanishi 17-shi Land Bomber (K-100)
« Reply #3 on: September 18, 2012, 04:12:43 am »
nice information!
the mamoru-kai are listed also on :
http://en.wikipedia.org/wiki/List_of_Imperial_Japanese_Navy_Air_Service_aircraft_engines

about Kawanishi 17-shi
http://forum.valka.cz/viewtopic.php/t/64996  surely was  G9K1 
« Last Edit: September 18, 2012, 05:12:30 am by airman »
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Offline blackkite

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Re: Kawanishi 17-shi Land Bomber (K-100)
« Reply #4 on: September 18, 2012, 05:58:11 am »
Many thanks airman. Nice information,too!

Offline burunduk

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Re: Kawanishi 17-shi Land Bomber (K-100)
« Reply #5 on: September 18, 2012, 10:47:03 am »
blackkite, thank you for very interesting information.
But 12800l of gasoline weights about 9200 kg.
And the difference between empty mass and MTOW is only 16000 - 8850 = 7150 kg.
 
So I suppose that here is a mistake in the data.
 
From the other side in valka.cz forum there is only 2800, not 12800 l are mentioned.
It seems too small: 2800 l gasoline + 240 l oil = 2400 kg, crew and cartridges are about 600 kg, torpedo 800 kg, totally
 
8850 + 2400 + 600 + 800 = about 12700 kg, much less than normal take-off mass and 3,3 ton less than MTOW (16 ton).
 
So, please, check weights one more time, if it's possible.
« Last Edit: September 18, 2012, 10:49:54 am by burunduk »

Offline blackkite

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Re: Kawanishi 17-shi Land Bomber (K-100)
« Reply #6 on: September 18, 2012, 01:01:00 pm »
Many thanks burunduk for your sharp and precious opinion. I will check K100 weight distribution. But perhaps it's hard for me. :)

Offline airman

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Re: Kawanishi 17-shi Land Bomber (K-100)
« Reply #7 on: September 18, 2012, 03:17:08 pm »
Knowing  the history of Mamoru engines, it's not very difficult understand why Mamoru-Kai was cancelled  + disastrous situation  (1944-1945)
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Offline blackkite

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« Last Edit: September 19, 2012, 05:05:06 am by blackkite »

Offline blackkite

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Re: Kawanishi 17-shi Land Bomber (K-100)
« Reply #9 on: September 20, 2012, 05:23:57 am »
Hi!
G4M2 Betty Engine : Mitsubishi Kasei21, displacement : 42L, take off power : 1850hp, Range : 3270n.m.(6056km), Fuel : 6300L
Kawanishi K100 Engine : Nakajima Mamoru-kai, displacement : 57.7L, take off power : 2300hp, Range : 3000n.m.(5556km)
So I suppose Kawanishi K100’s fuel 6300L×3000n.m./3270n.m.×57.5L/42L = 7940L
« Last Edit: September 21, 2012, 01:09:35 am by blackkite »

Offline Hikoki1946

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Re: Kawanishi 17-shi Land Bomber (K-100)
« Reply #10 on: January 24, 2013, 12:15:17 pm »

The K-100 was definitely not the G9K. The the whole designation of the G9K is confusing as so many authors kick it around various places. What gets me is that in some sources, it puts the G9K ahead and before the G8N. The G10N designation was not used by the Japanese for the Fugaku projects and was a post-war creation based on the progression of bomber designs. Robert C. Mikesh in an article for Airpower magazine feels the Kawanishi 19-shi elliptical winged, 6-engined bomber is likely the G9K. But then he muddles it by stating the design was also called the TB which I've seen listed as distinct from the 19-shi plane in some sources. If Mikesh is right, then the G9K would have followed the G8N and keep the progression intact. Maybe Kawanishi called their design the TB internally.



about Kawanishi 17-shi
http://forum.valka.cz/viewtopic.php/t/64996  surely was  G9K1

Offline Skyblazer

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Re: Kawanishi 17-shi Land Bomber (K-100)
« Reply #11 on: July 06, 2016, 01:49:47 am »
Topics merged.