K Airplane and Helicopter Plans
- Kaiser Ka-1 Rhönlaus
- Kalinin K-12
- Karpinski Akar
- Kaman HOK-1
- Kawanishi H8K2 (Emily)
- Kawanishi N1K2 Shiden (George)
- Kawanishi J6K1 Jinpu (Squall)
- Kawanishi J7W
- Kawasaki Ki-10 (Perry)
- Kawasaki KDA-5
- Kawasaki Ki-45 Toryu (Nick)
- Kawasaki Ki-48 (Lily)
- Kawasaki Ki-61 Hien (Tony)
- Kawasaki Ki-64 (Rob)
- Kawasaki Ki-100
- Kawasaki Ki-102b (Randy)
- Kellner-Bechereau E-5
- Kellner-Bechereau E-60
- Kinner Canary
- Klemm 25
- Koolhoven FK-49
- Koolhoven FK-51
- Korolev SK-3 Krasnaya Zvezda
- Kuznetsov A-4
