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Robin 200 & W&B problems
Robin 200 & W&B problems
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Robin 200 & W&B problems
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jtuggey
jtuggey
posted 5/21/2013 1:22:00 PM
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Dear All,
I've read the forums and also the help on skydemon website for how to setup the W&B.
However, I seem to be struggling.
The w&B 'polygon' has the correct numbers on x & y axis, to reflect exactly that in the PoH (x axis m.kg, y total weight, kg)
However despite various attempts at putting the invidual moments for passenger, fuel etc., the 'X" is way off the graph (which is not the case when I do this manually).
I'm a little confused about whether I need to redo the x-axis. Can anyone help please?
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stevelup
stevelup
posted 5/21/2013 7:29:44 PM
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Post all your numbers and I'll try to help
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jtuggey
jtuggey
posted 5/22/2013 8:29:49 PM
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Stevelup,
Many thanks for the prompt and helpful reply!
The coordinates from the PoH are, in clockwise direction:
95,400
125,575
250,780
360,780
180,400
Units are x axis, m.kg and y axis kg
CofG limits are +0.32 to +0.46 at 780kg
max authorised weight 780kg
Basic weight is 549kg
CofG is 0.268m aft of datum, of which total moment about the datum is 147kg/m
Arm for pilot + passenger are 0.45m
Baggage 1.2m
Fuel 1.1m (max is 85kg)
Hope that helps - really appreciate you looking at this for me.
Regards
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stevelup
stevelup
posted 5/23/2013 9:04:36 AM
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You've got the same issue as the other poster I replied to. Your envelope is for a moment, not a CG
Also, it's a bit confusing as your empty weight is 576kg yet your graph starts at 400kg
I found another POH online
here
- I accept that it's not necessarily for the same aircraft, but the rest of the values are the same.
This gives a loading envelope of:-
22,580, 32,780, 46,780, 46,580
(this also matches the figures you gave of .32 to .46 at 780kg)
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