Yep, Mike's right about Mr Howard Huntington's "device"
Good work Bankoletti !....I was going to say......
Re the second shot......
Is that a pair(?) of rotaries driving shafts to the props.....(cooling?)
A single seat (?) is that an observer/gunners position at the front (?)
The bloke stood in front of the a/c looks French.....
Many thanks for the info......but Mike got the Multiplane......your go Mike
Cheers
Alfie
PS I've just looked up the Salmson...it was armed with two 37 mm APX cannon