On 7/11/2022 8:04 AM, Flesner via KRnet wrote:
Divide the difference in the "moment" number by the difference in the
"weight" and that is the "arm" for the fuel.
That process should be used to determine t
On 7/10/2022 10:30 PM, Craig Williams wrote:
Because the datum in my plane no longer exists (tip of spinner) I needed to
pick a new Datum.
++
The "datum" is simply a location from which you take measurements.
On 7/10/2022 11:15 PM, Craig Williams wrote:
Thanks, that seems more reasonable. So the center of the tank is used for the
arm I would assume. After all it's essentially a rectangle. I did find a pic
on Marks website (http://www.flykr2s.com/wing.html) so measuring between the
spar faces also
The "datum" is not something that's calculated, its a "concrete" point
that will remain the same between flights and over the decades, whether
or not you change spinners, for example. You could also call it the
"origin".
The math is easier if you choose a point at one extreme or the other,
My KR2Ss wing tanks extend about 16 inches behind main outer wing spar at the
WAF
That’s about 20.5 from leading edge.
So about 1/2 through the tank from the L/E is about 20 inches.
Just doing an empty W&B as we speak
So that is what I will use till a professional W&B IS DONE.
Phil matheson
Thanks, that seems more reasonable. So the center of the tank is used for the
arm I would assume. After all it's essentially a rectangle. I did find a pic
on Marks website (http://www.flykr2s.com/wing.html) so measuring between the
spar faces also should give me the number I need. So far my r
I calculated the datum using the book method of weighing all three wheels,
adding fuel and weighing again. My wing tanks are at 21.6 aft of the
leading edge.
On Sun, Jul 10, 2022, 20:31 Craig Williams wrote:
> Because the datum in my plane no longer exists (tip of spinner) I needed
> to pick a n
Because the datum in my plane no longer exists (tip of spinner) I needed to
pick a new Datum. My question is what ya'll are using for wing tank arms as
measured from the leading edge? It looks to be about 16".
Thanks
Craig
N886MJ (N51CW)
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