Kawanishi J6K

The cockpit of the wooden mock-up of the Kawanishi J6K interceptor shows an interesting device. On the internet this is often speculated as an FK-3 radar indicator. And while both the FK-3 and J6K were developed by Kawanishi, this is quite unlikely. Both the timeline nor intended purpose match.

The J6K mock-up was presented in February and June of 1944, with the plane cancelled the 8th of July 1944. Development of FK-3 however didn’t start until October.

The intended purpose of the FK-3 as well was a long range search and patrol radar. It was intended to warn about incoming aircraft, but not precisely locate them as would be useful on an interceptor such as the J6K. It was also not an easy device to operate, requiring a 2nd person to do so, even if the pilot would have their own indicator.

The prototype doesn’t show any antenna either that would be required for the FK-3, nor does it show any other controls inside the cockpit, making it unclear if the device even is a radar in the first place.

While the device may indeed have been an theoretical radar or another, to date unknown device under development by Kawanishi, it is most likely not an FK-3.

레이더일수도 있고 아닐수도 있는 장치라고함

https://emmasplanes.com/index.php/japanese-radar/japanese-radar-fk-3-prototype-19-ku-1-model-12/