Hi my dear hesham!
You are absolutely right.
11-shi Carrier Dive Bomber was born from the competition between Aichi D3A and Nakajima D3N1.
D3N1 had retractable undercarriage with speed brake and under wing perforated speed brake panel same as SBD.
Chief designer was Ryozo Yamamoto.
Engine was Hikari-1 type.(Max power 820HP 3,400m).
MTOW:3,400kg, Wing span:14.5m, Overall length:8.8m, Wing area:34m2, Max speed:352km/h(3,000m), Range:1,519km.
3 planes were manufactured and 1 was survived till the end of the war.
Unfortunately all pictures and drawings were lost.http://www.geocities.co.jp/Bookend-Ohgai/3853/jnrs/jnrsC224c.htm