christoph.both(at)acadiau
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 Posted: Sat Sep 07, 2013 4:15 pm Post subject: Weight & Balance parameters requested: EUROPA CLASSIC TRI |
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Graham,
Thank you so much for addressing my questions. Much appreciated.
Best,
Christoph
From: GRAHAM SINGLETON <grahamsingleton(at)btinternet.com (grahamsingleton(at)btinternet.com)>
Reply-To: "europa-list(at)matronics.com (europa-list(at)matronics.com)" <europa-list(at)matronics.com (europa-list(at)matronics.com)>
Date: Saturday, 7 September, 2013 8:36 PM
To: "europa-list(at)matronics.com (europa-list(at)matronics.com)" <europa-list(at)matronics.com (europa-list(at)matronics.com)>
Subject: Re: Weight & Balance parameters requested: EUROPA CLASSIC TRI
Christoph
Don't be too confused by different data, (datums? don't sound right does it?)
The critical issue is the relationship between Centre of Pressure and C of G. The datum is an empirical position chosen for convenience of calculation, so you need to refer your calculated CG to the datum used to calculate it. I suggest you use the XS datum point, remember you need to be accurate with distance measurement, (0.1 inch.)
I always use a spreadsheet, this can be entered in your iPad to check loading in the field. This works for any airplane. I simply enter the relevant lengths which sometimes have a -ve sign if they are the other side of the datum. For another airplane just alter the measurements.
I hope that helps, please note I've had my nocturnal Scotch which might dilute quality of communication.
Graham
From: Christoph Both <christoph.both(at)acadiau.ca (christoph.both(at)acadiau.ca)>
To: "europa-list(at)matronics.com (europa-list(at)matronics.com)" <europa-list(at)matronics.com (europa-list(at)matronics.com)>
Sent: Saturday, 7 September 2013, 23:09
Subject: Re: Weight & Balance parameters requested: EUROPA CLASSIC TRI
Dear Europa Community:
I am in the process of establishing Weight&Balance for my Europa Classic Engine Frame Trigear.
The question of the firewall forward datum has come up as data produced from preliminary measurements of weight and distance have not yet returned a satisfactory reference to the required 58'-62.5' CG envelope.
The Classic version I completed has the Classic Engine Mount fitted, this is why I referred to the Pilot Handbook from 1998. However, the handbook shows only the MONO configuration. No reference to the recently more common zero station to be found at 29.75 inches forward from the backward firewall juggle is made there. And I assume this newer, more precise measurement probably applies to the XS motor mount and cowling which might have quite different dimensions. My Classic forward face of the cowling shows 29.0 inches from that firewall juggle.
Am I missing something important here? Where exactly os the Zero Datum for Classic Engine Mount Europas to be found?
Finally, I assume the nose wheel is supposed to point backwards towards the tail when taking weight and distance measurements from station zero.
If there is an official documentation how to establish W&B for my configuration, I appreciate this.
Thank you.
Christoph Both
#223 Classic 912ULS
C-GPEL
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