Sorry its not the B.E 12 or the Bf 110. Lets add a couiple more clues.
I am looking for a Warbird.
1. This airplane was a failure but it still made it into large scale production.
2. The large number built left leaders no choice to continue to deploy it.
3. Development was based on a combat doctrine found to be out of date.
4. It is a two seater.
5. The airplane had one obvious feature the manufacturer was known for.