But titan 404 the mass of the birds displacing the air whether stationary or flying has already been taken into account so it wouldn't cause a proportional change in the air pressure inside. If a ball is float 1 cm from the top of a glass or at the bottom of the glass it still takes up the same volume...... it has to be the downwards force produced through the lift generated.. not the weight of the birds.... put the birds and the air around the birds into a seperate systems within the cain system
Since we are talking about an aircraft as a enclosed environment.... lets put the bloody thing on the ground for ease of thinking.... why.. because it doesn't matter.
To cabin is supporting the mass of the air which is being disturbed by the the bird generating lift therefore producing the downwards force to produce their lift and applying a force on the bottom of the cabin to generate an increase in weight (or no change is should say)... if the undercarriage was put on a scale.
As for bernoullis principle...... well if birds are flapping their wing to flying arn't they using air deflection?.... but either way.... in this example both create a downwards force.
now i have a question........ what if the birds were inverted ????
