Thrust,drag and lift on airplane Question (1 Viewer)

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

1. The problem statement, all variables and given/known data

If the engine thrust is F(T)=130kN and the plane's weight is W=180kN,determine the atmospheric drag F(D) and the wing lift F(L).
What is the distance s to the line of action of the drag force?


3. The attempt at a solution

Well I have trouble with this question because I don't know where to start.In my statics book there is nothing on airplanes or about drag,thrust and lift.

I was thinking like the resultant force = F(T)- F(D)

I dont know the relationship between the drag,thrust and lift and couldnt find anything in my statics book.
So any hint or advice how to start it would be greatly appreciated or is there any equation I need to use.
Thanks.

http://img685.imageshack.us/img685/1364/11212009113824am.jpg [Broken]
 
Last edited by a moderator:

lanedance

Homework Helper
3,305
2
its flying at constant velocity... so all accelerations must be zero, ie. static equilibrium...
 
so then the drag is 130 and the lift is 180
and to determine s I can take moments at point where W is pointing
is this right?
 

The Physics Forums Way

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top