Jordanov-1 
One two-seat reconnaissance biplane (100 hp Argus) designed and built by Asen Jordanov. The first Bulgarian-designed aircraft operated by the Bulgarian Aviation Company. First flight early 1915, but grounded for design improvements. Flight tested on 7 August 1915 and accepted by Bulgarian Defence Ministry on 10 August 1915. Planned series production cancelled. Used for pilot training. Date withdrawn from service not known.

Serial	c/no.	Prev. Identity	Delivered	Fate/Notes
?	?		Aug 1915

References:

• Air Enthusiast No.94 July/August 2001 pp19-20
• Air Power of the Kingdom of Bulgaria Part II by Dimitar Nedialkov, 2001
• Asen Jordanov-1

Grigorov-1 
One two-seat reconnaissance biplane floatplane, designed and built by Atanas Grigorov. The first Bulgarian-designed floatplane. Basic layout based on the Friedrischshafen FF-33 seaplane. Named 'Leitenant Liapchev'. Evaluated by Bulgarian Navy with favourable results, but series production cancelled when prototype destroyed in a violent storm circa 1925.

Serial	c/no.	Prev. Identity	Delivered	Fate/Notes
-			1924

References:

• Air Enthusiast No.94 July/August 2001 pp19-20