Kyushu J7W1 Shinden/J7W2 Shinden-kai

[AndersJ]

I have heard of a situation I can only partially recall at 'flap reversal' in some aerodynamic conditions. It looks like this could have happened in the 'bank' manouvre.

This is another one I would like to see as a flying replica but then I would say that.

Yes, a J7W1 Shinden replica roaring by the grandstands and flying formation with Mustangs and Thunderbolts at air shows, that would really be something!

 

[Scott Kenny]

About the torque: At first I wondered why they were complaining so much about it, but if you think about it, on a tractor, the rotating slipstream induces angles of attack on the wings and tail section which counteracts the torque the pilot experiences while on a pusher, you’re left to counter the full force of the torque with the ailerons.

In addition, the short moment of arm for the rudders on Shinden don’t help either when trying not to veer of the runway, so I’m not surprised if they had to be even more careful with applying power at take-offs compared to typical tractor designs.

I suspect that the rudders would end up getting enlarged a good bit in the production version.

 

[AndersJ]

I suspect that the rudders would end up getting enlarged a good bit in the production version.

Yes, because not only was the moment of arm short for the rudders, but they were outside the slipstream as well, so basically nothing to work with until you got up to speed.

So when taking off, you would probably have to nurse the throttle quite a bit and avoid opening it up too quickly. I guess they must have used the brakes to keep straight until the speed built enough to give the rudders got control authority.

Connected to this, does anyone know anything about nose-wheel locks or variable gearing on the Shinden as in different modes for taxiing and take-off/landing?

 

[Scott Kenny]

Yes, because not only was the moment of arm short for the rudders, but they were outside the slipstream as well, so basically nothing to work with until you got up to speed.

Oh, ewwwwwwww.....

That would suck in levels I don't even want to think about thinking about...

Connected to this, does anyone know anything about nose-wheel locks or variable gearing on the Shinden as in different modes for taxiing and take-off/landing?

@blackkite ? There are times I wish I lived closer to DC, so I could go diving into the Smithsonian on a regular basis...

 

[Hetzer]

Hi all; what is the difference of angle of attack between the canard and wing (root) typically for a high performance aircraft such as Shinden?

 

[riggerrob]

I suspect that the rudders would end up getting enlarged a good bit in the production version.

Either larger rudders or mount them farther aft to improve the length of the tail moment arm.
The farther rudders are from the center-of-gravity, the more powerful they are.

 

[Justo Miranda]

Hi all; what is the difference of angle of attack between the canard and wing (root) typically for a high performance aircraft such as Shinden?

Hi

 

[AndersJ]

Hi all; what is the difference of angle of attack between the canard and wing (root) typically for a high performance aircraft such as Shinden?

As far as I know, the canard had a 1 deg higher angle of attack than the main wing on the prototypes.

But a number of changes were planned for the series aircraft: "Planned changes from prototype to series aircraft: Main landing gear moved back 10 cm. Propeller changed from 6 to 4 blade with wider blades, possibly 3.4 to 3.5 m diameter. Canard angle of attack versus fuselage reference line increased from 1 to 3 degrees."

Unfortunately, I only have this text in my notes but I'm no longer sure about the provenance. Maybe someone else can confirm and source where the text comes from?

 

[blackkite]

The first prototype of the Shinden, completed in June 1945, failed to take off in July and damaged its propeller.
At the time of the first flight on August 3, a white chrysanthemum tail wheel was added to the lower end of the vertical stabilizer as a temporary measure.
The second test flight was conducted on August 6, and the third test flight on August 8. During the test flight, the engine broke down, and the war ended while repair parts were being ordered from Mitsubishi Heavy Industries for the next test flight.
As a result of the test flight, it was decided to increase the front wing angle of attack from 1 degree to 3 degrees and set the flap operating angle to 35 degrees for the first prototype in order to improve the vertical balance.
In addition, the addition of a large air scoop was considered as a countermeasure against the oil temperature, which tended to rise during flight. It was also considered to incorporate an auxiliary mechanism into the flight control system to counter the tendency of the aircraft to tilt to the right at low speeds due to torque.

 

[blackkite]

[Smithsonian National Air and Space Museum NASM. Steven F. Udvar-Hazy Center] Shinden
14390 Air and Space Museum Parkway, Chantilly, Virginia 20151 U.S.A.

The Smithsonian National Air and Space Museum NASM. Steven F. Udvar-Hazy Center, adjacent to Washington Dulles Airport, has restored and exhibited most of the Japanese Army and Navy aircraft, including those that were transported from occupied Japan for research after the war.

The "Ohka" exhibited next to the Gekko has disappeared somewhere,
and the "Shinden" has come to where the Ohka was!

Steven F. Udvar-Hazy Center · Steven F. Udvar-Hazy Center, 14390 Air and Space Museum Pkwy, Chantilly, VA 20151

âââââ · Museum

www.google.com