Robin 200 & W&B problems

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Robin 200 & W&B problems

Author	Message
jtuggey	jtuggey posted 5/21/2013 1:22:00 PM Topic Details Share Topic
Group: Forum Members Posts: 2, Visits: 7	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 Post Details Share Post
Group: Moderators Posts: 593, Visits: 4.9K	Post all your numbers and I'll try to help
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jtuggey	jtuggey posted 5/22/2013 8:29:49 PM Post Details Share Post
Group: Forum Members Posts: 2, Visits: 7	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
	Like 102
*stevelup*	*stevelup* posted 5/23/2013 9:04:36 AM Post Details Share Post
Group: Moderators Posts: 593, Visits: 4.9K	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)
	Like 112