W&B Calcs, second pair of eyes needed (again !)
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Location: Glens o' Angus by way of LA
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W&B Calcs, second pair of eyes needed (again !)
OLd numbers Empty Weight 1425, CG 10.86, Moment 15481.03
Equipment Removed (1) Weight 56 Arm -61.3
Equipment Removed (2) Weight 4.0 Arm -62.2
Equipment Added (1) Weight 52.0 Arm -61.3
Equipment Added (2) Weight 2.0 Arm -62.2
New Empty Weight 1419, CG ?, Moment?
Equipment Removed (1) Weight 56 Arm -61.3
Equipment Removed (2) Weight 4.0 Arm -62.2
Equipment Added (1) Weight 52.0 Arm -61.3
Equipment Added (2) Weight 2.0 Arm -62.2
New Empty Weight 1419, CG ?, Moment?
Join Date: Jan 2005
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Arm (CG) = Moment / Weight
To nearest 2 decimal places
Starting: 10.86 = 15481 / 1425
Kit you're removing:
-56 * -61.3 = 3432.8
-4 * -62.2 = 248.8
After removal:
Weight = 1425 + (-56) + (-4) = 1365
Moment = 15481 + 3432.8 + 248.8 = 19162.6
CG (Arm) = 19162.6 / 1365 = 14.04
Kit you're adding:
52 * -61.3 = -3187.6
2 * -62.2 = -124.4
After adding:
Weight = 1365 + 52 + 2 = 1419
Moment = 19162 + (-3187.6) + (-124.4) = 15850.6
CG (Arm) = 15850.6 / 1419 = 11.17
New Empty Weight: 1419, CG: 11.17, Moment: 15850.6
PLEASE get someone else to verify these before trusting them when doing W&B calculations before flight.
OC619
Edited to add:
This seems reasonable because if you're removing weight with a negative ARM then the result would be to make the ARM more positive
To nearest 2 decimal places
Starting: 10.86 = 15481 / 1425
Kit you're removing:
-56 * -61.3 = 3432.8
-4 * -62.2 = 248.8
After removal:
Weight = 1425 + (-56) + (-4) = 1365
Moment = 15481 + 3432.8 + 248.8 = 19162.6
CG (Arm) = 19162.6 / 1365 = 14.04
Kit you're adding:
52 * -61.3 = -3187.6
2 * -62.2 = -124.4
After adding:
Weight = 1365 + 52 + 2 = 1419
Moment = 19162 + (-3187.6) + (-124.4) = 15850.6
CG (Arm) = 15850.6 / 1419 = 11.17
New Empty Weight: 1419, CG: 11.17, Moment: 15850.6
PLEASE get someone else to verify these before trusting them when doing W&B calculations before flight.
OC619
Edited to add:
This seems reasonable because if you're removing weight with a negative ARM then the result would be to make the ARM more positive
Last edited by OpenCirrus619; 20th Jul 2016 at 17:13. Reason: To add
I agree with Open Cirrus
pb, I would have thought your AME would have done a new W&B.
pb, I would have thought your AME would have done a new W&B.
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pb,
I would have thought your AME would have done a new W&B?[/QUOTE]
Oh he will, but wants to charge me an arm and a leg (pun intended) to do it because he didn't get the prop sale, so I'm going to present him with the amended calcs for signature about 10 minutes before I get my checkbook out to write a 20k check for the inspection.
I would have thought your AME would have done a new W&B?[/QUOTE]
Oh he will, but wants to charge me an arm and a leg (pun intended) to do it because he didn't get the prop sale, so I'm going to present him with the amended calcs for signature about 10 minutes before I get my checkbook out to write a 20k check for the inspection.
Well let me wait a "moment" before I decide what my charge will be. 
OK. Let's just call it a trade for my ride in your "little yellow plane". You'll have to negotiate separately with Open Cirrus.
OK. Let's just call it a trade for my ride in your "little yellow plane". You'll have to negotiate separately with Open Cirrus.
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I spend most of my time in the gliding world - it works slightly differently from the power one, in that most things (including instructor time) are donated free of charge.
The odd beer (after the hangar doors are shut) doesn't go unappreciated.
Enjoy
OC619
The odd beer (after the hangar doors are shut) doesn't go unappreciated.
Enjoy
OC619
Well spotted, dont overfill.
For AME, read A&P.
For AME, read A&P.
