Name	Explanation	Examples
L	Initial of N.R.Lobanov	L-1
La	Initials of Lavochkin Design Bureau;	La-5, La-15
LB, LB-2LD	Light Bomber, Legkij Bombardirovschik, Light Bomber with 2 Lorraine-Dietrich engines)	LB-2LD
LEM	Initials of Lev Malinovskij	LEM-2, LEM-3
LFI	Light front line fighter, Legkij Frontovoj Istrebitel
LIG	Leningrad Institute for Civil Airfleet, Leningradskij Institute GVF	LIG-6
LII	Flight Research Institute, Letno-Issledovatelskij Institute	See LII WEB Site, Zhukovsky and Gromov, Flight Research Institute named for M M Gromov, State Research Centre
LK	Leningrad Factory, Leningradskij Kombinat	LK-1
LL	Flying Boat, Letauschaja Lodka	LL-143
LL	Aircraft by Lushin and Lavochkin, Lushin-Lavochkin	LL Lushin-Lavochkin
LL	Flying Laboratory, Letauschaja Laboratorija	LL-1,-2,-3
LM	Seaplane by V.A.Lebedev, Lebed Morskoj	LM-1
LM	Aircraft by V.A.Lykoshkin and N.G.Mikhelson, Lykoshkin-Mikhelson	LM
LR	Light Recco, Legkij Razvedchik	LR
LSh	Light attack fighter, Legkij Shturmovik	LSh
LSh	Light Headquarter Liaison, Legkij Shtabnoj	U-5 LSh
LYaM	Aircraft built by M.G.Lerke, G.V.Yankovsky and F.E.Mosca. Designation built of the last names initials.	LYaM