Other mistake: When the two heroes are wind riding the plane they more or less repaired (about 1 hour and 30 minutes from the beginning of the movie), the wind blows from the right side of the plane to the left, but the hero is counter balancing the plane on the left side as if the wind were coming from the left. He should be standing on the right side of the plane to really balance it.
Suggested correction: They are using the aileron and rudder to counter the effects of the wind and to provide forward momentum. The makeshift wing was placed on the right side of the roof meaning he would have to be floating in mid-air to be on the right side of the plane which is not feasible.
Other mistake: After Dirk, Al, and Eva jump from the camels to the train the camels are seen practically huddled together when noticed by the guard even though each camel traveled further than the last one.
