Actually, not even slightly - however, it was in turn - let me explain....
I originally took the classic Type-S Wedge. I decided I'd like to have the engines exposed rather than sat in a great hall in the back of the ship. With this in mind I started curving it's lines to make it more genuinely streamlined.
The resultant desing smacks rather a lot of Amidala's Nubian design from the Phantom Menace. Once I realised that I kind of just went with it.
The Nubian itself is based on the SR-71 so I guess in a way it is based on the SR-71 but not intentionally so.
Regards,
Crow