For whatever its worth, here is still another BD-5 electric. This one was published in the Japanese R/C Technic magazine.
Lenght ４６０ｍｍ
Wingspan ６７０ｍｍ
Weight ２２０ｇ
Battery ８．４Ｖ２２５ｍＡ
See http://www.h2.dion.ne.jp/~masahy/bd5.htm for more pictures.
