Scale Soaring UK

Max Wright wrote: ↑24 Oct 2020, 22:08 When I lifted the assembled model, it seemed extra heavy. So I stepped on to the scales, deducted my 90 kg and the residue was 4.5 kg. The wings together have an area of 0.570 m² = wing loading of 126 grams/m².

Max, I think your calcs are a bit out. 4.5kg & 0.57m square, gives 9.7kg/m square.
This equates to nearly 26oz/sq ft in old imperial money - which is a bit heavier than the 16oz/sq ft area I would expect. If that is correct then it might need a good blow to stay up!

My advice was 0.570 m² ÷ 4.5 kg = 0.126 kg/m² Peter.

Are you doing 0.570 m² x 4.5 kg = 2.56 ?

No. That's not 9.7 kg/m²

Sorry. How did you arrive at 9.7?

4.5 ÷ .570 = 7.89

4.5 x .570 = 2.56

Sorry for being thick. What are we missing?

Cheers

1/0.57= 1.754385964912281

1.754385964912281 x 4.5 = 7.89

So 7.89 Kg/SqMtr
or 23.59 Oz/Sqft

I could be wrong though.



BC

Max, as Barry shows - you have to divide your weight by your wing area (in sq m), thus you increase your weight per m sq. as you say you have less than 1 sq m.
(Wing loading = weight / wing area)

But this is in upside down land.......................

RobbieB wrote: ↑25 Oct 2020, 10:19 But this is in upside down land.......................

I would like it noted that I did not say that....

BC

Barry_Cole wrote: ↑25 Oct 2020, 11:18

RobbieB wrote: ↑25 Oct 2020, 10:19 But this is in upside down land.......................

I would like it noted that I did not say that....

BC

But I bet you thought it

My long and well thought out reply has disappeared.

The precis is "What is my wing loading in grams per square decimetre?"

That's the yard stick.

Max,
Google says multiply by 10, so that makes 78.9grams/decimetre squared.

Thanks, Peter.