On Friday, August 22, 2014 2:22:52 AM UTC-7, Bruce Hoult wrote:
On 2014-08-22 06:08:12 +0000, Andrew Ouellet said:



In many of Johnson's flight test reports, he refers to something like

'the square root of the wing loading' method to unify glide polars

taken from different gliders at different wing loadings down to a

common wing loading in order to be effectively compared. Can someone

explain what this is and how to do this?



I have a strong engineering background so no need to mince words.

Thanks!



Which part of that description do you not understand?



I'll assume you understand "square root". So, "wing loading" is the

total mass of the aircraft and occupents divided by the area of the

wings. Generally you'll find it in kg/m^2, in which case a modern

racing glider can generally be adjusted in range typically something

like 30 - 60, with older wood/fabric gliders having lower numbers.



Work out the square root of it, and use it to normalise all horizontal

and vertical speeds in the polar diagram.

I found your reply to be condescending and did not explain how to "normalize" whereas Andrew's reply did.
Tom