Chuck Mangione plays the trumpet and the flugelhorn.

Yes, a Flugelhorn is a brass instrument because it uses a mouthpiece and the player's vibrating lips to produce sound. The flugelhorn resembles a trumpet but has a wider, conical bore.

Brass

diameter of the pipe

A flugelhorn uses the same fingering and is played in the same manner as a b flat trumpet or cornet. I find notes with the flugelhorn mouthpiece a little harder to find and control than my trumpet, but that probably means that I just need to practice more.