Both Automotive and Aviation industry follow Aerodynamic design principles.  Almost all cars on the road have an aerodynamically minded design. The design is inspired by Fighter jets sometimes. Many modern vehicles feature advanced radar or LIDAR based driven systems like PCAS for sort, automatic line centering, etc. These are practised in the aviation industry. Both industries go hand in hand with new and advanced technologies making life simpler. So based on this, if you can learn additional courses in Aviation Industry after your B.Tech, it should not be difficult to work in aircraft.

Hey there

There is no restriction as such. Nowadays industries need engineers from every sector like a steel manufacturing company needs electrical, mecanical, CSE, Electronics and various other engineers same way an aircraft manufacturing company needs Automobile engineers too but there numbers are less in company and they do not do the core job of the company rather they are employed in maintainance and other departments.

Good luck