Hi! David
No Opinions from me ... not qualified.... but I have the weight and balance
documents as produced by Andy Draper at the factory for G-PTAG and it shows
MAx FWD C.G. 58.0" Max Aft C.G. 62.5 "
So I reckon that your C of G would be better with my 1lb of my Torque Tube
Drive Clamp mod. being of more constructive use than your 3lb of lead !!!
It would seem to me to be most desirable to have it midway between Max. and
Min. but full of fuel or empty needs to stay within the range.
G-PTAG published figures are ...APS Weight 933.04 Arm Inches 59.22 Moment
55257.19
FWD C of G ...Total " 1370.04 " " 58.34 Moment
79929.19
AFT C of G ...Total " 1194.04 " " 62.50 "
74633.19
Own Design 9 Gallon LR Tank Empty Total " 941.04 " " 59.44 "
55933.19
I'm now bracing myself for some smart arse to tell me different! but at
least you have some more figures to chew!!!
Regards
Bob Harrison G-PTAG
-----Original Message-----
From: forum-owner@europaclub.org.uk
Subject: C of G position
Does anyone have a view on what an ideal C of G position is? Mine initially
came out at 58.5", with battery in the engine compartment, 914 and wobbly
prop, albeit a light one. I calculated that 3 lbs of lead bonded and bolted
to the front of the stern post would take it back to 59", and this seemed a
better bet than repositioning the battery which would have been a fair
amount of hassle, and involved some extra weight and diminished electrical
efficiency. The 59" position lets me carry 400lbs pax with no fuel or
baggage, (clever that!), or alternatively 120 lbs pax and full fuel + 80 lbs
luggage, which two loadings take the C of G pretty much to the two limits.
What has anyone else settled on? Davbid Joyce G-XSDJ
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