What was Charles Lindbergh's biggest problem in his solo flight across the Atlantic Ocean?

Answer 1

The major problem of the 33-hour flight is that he had worried he did not have enough fuel to finish the flight. It is said that he literally had no fuel left when he entered Paris airspace. He used gravity, not his engine, to land on the runway.

Another serious problem was wing icing, and had it worsened. he might have turned back.

A serious drawback to the design of his aircraft was that he could not see straight ahead, his view being blocked by a spare gas tank. He had to look out of his side window.