techumseh
Deity
Found this on Quora:
"It means that’s it was a modified version of the base plane.
“Bis” by itself is not an abbreviation in this instance. It’s a phonetic name for Russian letter “Б” -that makes English “b” sound.
Just like you would use certain words when you spell in English - like Foxtrot for F , or India for I, you would use Bis to mean that’s its a Б version of the plane - i.e. a new modification . Like this I-15 Bis"
So essentially gentlemen, it means plane B.
"It means that’s it was a modified version of the base plane.
“Bis” by itself is not an abbreviation in this instance. It’s a phonetic name for Russian letter “Б” -that makes English “b” sound.
Just like you would use certain words when you spell in English - like Foxtrot for F , or India for I, you would use Bis to mean that’s its a Б version of the plane - i.e. a new modification . Like this I-15 Bis"
So essentially gentlemen, it means plane B.