mass and balance question, can anyone answer this one
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Join Date: Apr 2003
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mass and balance question, can anyone answer this one
how much mass must be added to a hold at -150 inches, in order to move the c og g of a 52900kg aircraft 120 inches forward from its initial position of +515 inches
an explaination would be most helpful with this
thank you
an explaination would be most helpful with this
thank you
Join Date: Nov 2002
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Corr! What a cr@p question. Most I have seen are "how much must be moved from hold A to hold B" so I had to think about this one.
If y = amount to be added
then 395 * ( 52900 + y) = ( 52900 * 515) + ( y * -150)
Logic being the new moment (new postion 395 times new weight [52900 + y]) equals the old moment ( 52900 * 515) plus the moment of the new weight (y * -150).
20895500 + 395y = 27243500 - 150y
395y + 150y = 27243500 - 20895500
545y = 6348000
Answer y = 11648kg
I'll await other responses
D
If y = amount to be added
then 395 * ( 52900 + y) = ( 52900 * 515) + ( y * -150)
Logic being the new moment (new postion 395 times new weight [52900 + y]) equals the old moment ( 52900 * 515) plus the moment of the new weight (y * -150).
20895500 + 395y = 27243500 - 150y
395y + 150y = 27243500 - 20895500
545y = 6348000
Answer y = 11648kg
I'll await other responses
D
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I
Come up with 31421.8 KG
m/M=d/D
515-120= 395 = d
515+150= 665= D
m = not known
M = 52900
so now> m/ 52900 = 395/665
m/52900 = .5939849 = m = .5939* 52900= 31421.8
I usually draw a line for such questions and insert the valid info into it as so>
-150 0 120 515
------------------------------------------------------------------------------
you know the weight and you know how far and what is the maximum it can move between -150 and 515.
Not sure if it's correct since I'm a bit tired right now.
m/M=d/D
515-120= 395 = d
515+150= 665= D
m = not known
M = 52900
so now> m/ 52900 = 395/665
m/52900 = .5939849 = m = .5939* 52900= 31421.8
I usually draw a line for such questions and insert the valid info into it as so>
-150 0 120 515
------------------------------------------------------------------------------
you know the weight and you know how far and what is the maximum it can move between -150 and 515.
Not sure if it's correct since I'm a bit tired right now.
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the answer is.....
well done to those who aswered correctly - 11648kg
many people looked at the question but only four attempted it,
tune in next week for some more wacky questions
many people looked at the question but only four attempted it,
tune in next week for some more wacky questions
TightYorksherMan
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Did anyone sit it this time in January?
Was there anything "out of the blue"?
what did the big markers at the end ask?
I am sitting in Feb.
Jinkster
Was there anything "out of the blue"?
what did the big markers at the end ask?
I am sitting in Feb.
Jinkster
