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% MAC

  • bosh-777
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bosh-777 created the topic: % MAC

The rear limit of the CoG range of an echo aeroplane at a gross weight of 2300KG is ?

- 11.6 % mac
- 25.8 % mac
- 5.8 % mac
- 32.1 % mac


2300 - 2190 = 110

110/1900X100 = 5.78 closest is 5.8%.

Thats what i done but the answer is wrong ??
#1

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bobtait replied the topic: Re: % MAC

I'm sure you've heard the old one about read the xxxxxxx question! The question is asking for the REAR limit of the centre of gravity range. That's 2680mm for any weight. In this case you don't have to use the forward limit formula.

Sorry for being so devious. All the best with your study.

Bob
#2

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  • bosh-777
  • Topic Author

bosh-777 replied the topic: Re: % MAC

Thank you so much bob !! reading the question over again, i see my stupid mistake. Thats my biggest mistake not reading the questions properly
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