Thanks for the kind cooperation and advice, Wojtek and GG.
Thanks for the kind comment, Gnomey.
The wind tunnel building is not a museum. Time stops there as if nothing happened since 1945.
The wooden Ki-44 model was donated to National Museum of Nature and Science in Tokyo by the university.
Thanks for the nice info and enjoying my work, Wuerger190
This is an old story but I am the first guy who introduced the JACAR archives to Japanese aviation researchers in March, 2004 first and it spread to the world through J-Aircraft in the U.S. Taking this opportunity, I must appreciate Mr Jim Lansdale and Mr David Aiken for their cooperation and timely advice about what researchers always want.
I heard this retracting device was a copy of Vought V-143's as well as for the Zero's.
The right sub-shaft seen is not straight but a crank so that it makes locking/unlocking firm and easy.
I think the designer was genius.