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Author Topic: Nakajima Ki-52  (Read 6166 times)

Offline gerhard

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Nakajima Ki-52
« on: May 10, 2012, 02:58:15 am »
Hi Guys
 
Check out the link below. My Japanese is not good at all, but this site claims that the Ki-52 is an Army dive bomber version of the Nakajima D3N1. Could this true? Could someone perhaps clarify this?
 
http://w.livedoor.jp/harmony-gold_japan/d/%c3%e6%c5%e7%20%bd%bd%b0%ec%bb%ee%b4%cf%be%e5%c7%fa%b7%e2%b5%a1

Cheers
Gerhard

Offline Justo Miranda

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Re: Nakajima Ki-52
« Reply #1 on: May 10, 2012, 03:08:25 am »
Hi

Offline Skyblazer

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Re: Nakajima Ki-52
« Reply #2 on: May 10, 2012, 03:28:59 am »
Very interesting. Thanks to your findings I've tried to do a comparison of the two aircraft in profile form at the same scale (see below), and they match almost perfectly (differences being in the engine, which is shorter on the Ki-52, the absence of tail-hook, the all-glazed rear-cockpit and the slightly different shape of the tail).

Offline gerhard

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Re: Nakajima Ki-52
« Reply #3 on: May 10, 2012, 10:22:49 pm »
Hi Guys
 
That is great. Thank you Stargazer and Justo. But is there proof and I still would like for someone to confirm this.
 
Cheers
Gerhard

Online Jemiba

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Re: Nakajima Ki-52
« Reply #4 on: May 11, 2012, 01:25:26 am »
Cannot read the Japanese text, but the picture on the page posted by Justo suggests,
that the landing gear doubled as dive break ? Read something like that before about at
least one other aircraft, but nevertheless it seems to indicate some kind of a make-shift type.
It takes a long time, before all mistakes are made ...

Online Arjen

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Re: Nakajima Ki-52
« Reply #5 on: May 11, 2012, 02:44:52 am »
The SAAB 17 also used its landing gear as a dive brake.

Online Jemiba

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Re: Nakajima Ki-52
« Reply #6 on: May 11, 2012, 03:18:39 am »
Ah, yes, you're right, I think, that's the type, I've read about. But the Saab seems to have
quite strong fairings of the landing gear legs and I can imagine, that the wind loads on a dive
brake are quite severe.
It takes a long time, before all mistakes are made ...

Online Arjen

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Re: Nakajima Ki-52
« Reply #7 on: May 11, 2012, 03:27:40 am »
The Ki-52 seems to lack landing gear covers completely <edit>it has small gear covers, but they extend sideways, not down</edit>. That should actually reduce aerodynamic forces on extended landing gear. In both designs, landing gear and gear actuators must be robustly made to avoid the landing gear being pushed back into the wings, or worse, torn off entirely.
« Last Edit: May 11, 2012, 03:44:36 am by Arjen »

Offline Justo Miranda

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Re: Nakajima Ki-52
« Reply #8 on: May 11, 2012, 08:20:20 am »
The SAAB 17 also used its landing gear as a dive brake.


here... :)

Online Jemiba

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Re: Nakajima Ki-52
« Reply #9 on: May 11, 2012, 12:25:25 pm »
In both designs, landing gear and gear actuators must be robustly made to avoid the landing gear being pushed back into the wings, or worse, torn off entirely.

And probably must be modified in a way, that enables them to be set at intermediate angles between retracted
and fully extended, I think ?
It takes a long time, before all mistakes are made ...

Offline LAW

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Re: Nakajima Ki-52
« Reply #10 on: May 11, 2012, 02:00:18 pm »
another drawing...
 
regards
 
 

Online Arjen

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Re: Nakajima Ki-52
« Reply #11 on: May 12, 2012, 03:21:18 am »
In both designs, landing gear and gear actuators must be robustly made to avoid the landing gear being pushed back into the wings, or worse, torn off entirely.

And probably must be modified in a way, that enables them to be set at intermediate angles between retracted
and fully extended, I think ?
That looks sensible. It also illustrates that seemingly simple ideas sometimes cause all kinds of complications: using landing gear as dive brakes leads to bigger actuators, stronger mounting points, intermediate retraction angles and who-is-to-know-what-else.

Furthermore, I am happy to note 'SAAB 17' by Bo Widfeldt and Åke Hall attracted such an august reader as Justo, I had to read my copy with a dictionary nearby because my Swedish is sort of rudimentary.
« Last Edit: May 12, 2012, 05:24:28 am by Arjen »

Offline Justo Miranda

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Re: Nakajima Ki-52
« Reply #12 on: May 12, 2012, 04:48:41 am »
 ;)

Offline famvburg

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Re: Nakajima Ki-52
« Reply #13 on: May 12, 2012, 06:54:54 am »

      As did the Corsair, too. Also I know of at least 2 large a/c that use only the main landing gear as speed brakes (while not dive brakes they serve the same purpose), the Grumman Gulfstream I & the DC-7. 


The SAAB 17 also used its landing gear as a dive brake.

CostasTT

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Re: Nakajima Ki-52
« Reply #14 on: May 12, 2012, 11:49:36 am »
And the Loire-Nieuport LN.401.