| | lbs | kg | % | % | x | x*m |
| wing weight | 1397.21 | 633.76 | 14.3 | 0.5 | 4 | 2535 |
| fuslage weight | 582.11 | 264.04 | 6.0 | 0.4 | 2.13 | 562.4 |
| empennage w | 190.33 | 86.33 | 1.9 | 0.43 | 4.3 | 371.23 |
| undercarriage w | 400.70 | 181.75 | 4.1 | 0.35 | 3.5 | 636.14 |
| landing gear | 407.96 | 185.05 | 4.2 | 0.15 | 1.5 | 277.57 |
| nacelle weight | 227.41 | 103.15 | 2.3 | 0.5 | 4 | 412.61 |
| installed engin w | 1810.90 | 821.41 | 18.5 | 0.5 | 4 | 3285.6 |
| propeller w | 225.31 | 102.20 | 2.3 | 0.5 | 4 | 408.8 |
| fuel system | 57.94 | 26.28 | 0.6 | 0.48 | 4.8 | 126.14 |
| flight controle weight | 228.91 | 103.83 | 2.3 | 0.25 | 2.5 | 259.58 |
| hydraulic system | 58.54 | 26.55 | 0.6 | 0.45 | 4.5 | 119.48 |
| electrical sys | 283.02 | 128.38 | 2.9 | 0.26 | 2.6 | 333.78 |
| aircon system | 113.81 | 51.62 | 1.2 | 0.4 | 4 | 206.49 |
| avionic sys | 156.37 | 70.93 | 1.6 | 0.1 | 1 | 70.928 |
| furnishing weight | 574.80 | 260.72 | 5.9 | 0.43 | 4.3 | 1121.1 |
| miscellanious operating | 47.50 | 21.55 | 0.5 | 0.15 | 1.5 | 32.318 |
| flight crew | 205 | 92.99 | 2.1 | 10759 | ||
| OWE | 3160.53 | Xcg | 3.404248 |
i need the fuel weight to get new MTOW then update my OWE !!!
the rest of weight and positions are correct
fahim i havnt done the loops i have been updating the weights
i havnt even started my other part that weight 13 marks. i could do with little help to be honest. seems that me and ilkay going to end up more than certain people. (17 marks its loads), if someone hasnt got much to do we could do with little help at least loading loop, so i can start my 30 pages of writing.
Question, maybe i need clarification. How is the propeller 5m away from the nose and the wing is 3.5m away. Or am I not understanding the table properly?
ReplyDeleteAbzy
the center of gravity of the whole aircraft will change every time you change the position of the wing and engine including propeller, the note i have says the propeller position its up to where you put it so im going to email you my excel file when you place the propeller on the aircraft all you have to do is update the position on the excel file and it will generate new position of the CG. the positioning of the propeller is up to you, when you update it let us know:
ReplyDeletehere is a tip
Centre of Gravity
As a guide to establishing the aircraft empty centre of gravity, the following values are reasonable ranges based on current large civil transports:-
Wing, tailplane, fin 36 ~ 42% MAC (depends on sweep)
Fuselage 45 ~ 50 % fuselage length
Landing gear as located - nose gear 10 ~ 14% total landing gear weight
Engines/pylons as located
Fuel system 46 ~ 48% fuselage length
Control surfaces 57% fuselage length
Electrical systems 26 ~ 32 % fuselage length
Hydraulic systems 42 ~ 50% fuselage length
Air systems 36 ~ 42% fuselage length
Avionic systems 10 ~ 20 % fuselage length
Furnishings 43 ~ 48% fuselage length [i.e. about 2% ahead of fuselage CG]
thats the data i have been given
btw the x for the wing is 1/4 the mac.
ReplyDeletethe above one is updated
ReplyDeleteupon these calculation the CG position is on 19% of the mac which is brilliant results as the CG range suppose to be: 5-55% mac
ReplyDeletetry to keep the positions as it is if you change anything let me know i will calculate the position in terms of mac