Curtiss XNBS-4
Role Biplane night bomber
National origin United States
Manufacturer Curtiss Aeroplane and Motor Company
First flight 1924
Primary user United States Army Air Corps
Number built 2
Developed from Martin NBS-1

The Curtiss Model 36 XNBS-4 was a 1920s prototype biplane night bomber built by the Curtiss Aeroplane and Motor Company for the United States Army Air Corps.[1]


The XNBS-4 was developed by Curtiss as an improvement on the Martin NBS-1. Two prototypes, AS68571 and AS68572, were built. The design did not enter production because it offered no significant improvement over the NBS-1.[1]


Data from National Museum of the United States Air Force[1] and Aerofiles[2]

General characteristics




  1. ^ a b c "Factsheet: Curtiss XNBS-4". NMUSAF. Archived from the original on 16 June 2012. Retrieved 12 July 2017.((cite web)): CS1 maint: bot: original URL status unknown (link)
  2. ^ Eckland, K.O. "K through Z". Retrieved 31 March 2015.
  3. ^ Lednicer, David. "The Incomplete Guide to Airfoil Usage". Retrieved 16 April 2019.