This follow-up is written by Mr. Lars Sundin of Sweden:
I am quite convinced that it is as Mr Isacson writes in his autobiography, from which I attach two pages, namely that he presented this "project" as a graduation thesis for an engineering degree. He does not tell how detailed the study was and he gives the impression it was all his own concept. He tells the the two man crew were located in lying positions (pilot on his belly and the other man on his back) and that a braking parachute was to be used. Mr Isacson also tells that the German "Signal" wrote "The design by the "Swedish" designer Sigurd Isaacson that is shown in "Aero-Express" is a copy of a German..." He also draws the attention to the antisemitic flavour in the Signal wording (Swedish between quotation marks and the misspelling of his name.) He does not tell how the knowledge of his ""project" spread to the belligerent powers but I guess it first was presented in a Swedish magazine It may very well be just that Mr Isacson knew of the patent of Richard Vogt or some presentation of it. He is in his autobiography not always fully correct. For example, he tells that the magazine Aeroplane Monthly in the February 1999 issue states that the Germans started to develop a similar project after he had presented his. However, in this article "Flying flat out" by Hans Amtmann and dealing partly with the "attack glider" Bv 40 (where the pilot is in a prone position), nothing is mentioned of Mr Isacson or any other B&V project. Mr Isacson was born in 1922. He was active in oldtimer model flying last year.