Ask an Engineer New Bombardier Inc. The ASK AN ENGINEER series is here. Our Bombardier engineer will demystify the science behind the making of planes and trains. Discover how we surpass the limits of innovation. Viewing of Show all photos and videos Show all photos and videos Show only photos Show only videos Ask an Engineer - Video 3 - Why are the tips wing sometimes bent upwards? Ask an engineer - Video 2 - Are aircraft lightning proof? Ask an Engineer - Video 1 - Why do planes have rounded windows?