Letov S-9 (1923) proect three engined bomber (see - S-15 layout 2)
Letov S-24 (1927) light night bomber (development S-16)
Letov S-27 (1928) proect high-wing monoplane, three engined (Walter "Jupiter" 450 h.p.) passenger
airplaine /18 person/
Letov S-29 (1929) bomber, high-wing monoplane, 4x Walter "Jupiter" (location:
one under the wing of another over it), project only
Letov S-30 (1928) passenger airplaine /18 person/, biplane, 4x Walter "Jupiter" (pull & pusher) project
only.
Letov S-38 (1930) two-seat reconnaissance biplane, with gun turret, twin-finned (transferable S-328)
Letov S-41 (1934) layout 1
assenger airplaine /12 person/, twin-engined, project only
S-41 (1934) layout 2
assenger airplaine, twin-fuselage aircraft /1+6 person in every/ project
only .
source: V. Nemechek "Czechoslovak aircraft 1918-1945" Volume 1.,
(Some of them have views from the side. If interested can send posting)