radiators have no influence on speed

[ACE-OF-ACES]

Originally Posted by David198502

the whole document is twisted 90° left.
so the speed is actually on the y axis.

Disagree.. Look at the top of the document.. The heading is not rotated, which is the way it is scanned in and how it will appear when you click on the link. Thus all my references are to how it is presented. PS the word is rotated not twisted

Originally Posted by David198502

but there is also the temperature on the y axis as well in the lower half...

Which pertains to the temperate graph.. which is not what we are talking about, we are talking about how it affected the speed

Originally Posted by David198502

and the rads settings are on the x axis in mm.

If you want to rotate the graph, go for it, but all my references are to the graph in how it is presented (un rotated) in a typical 8 1/2 by 11 sheet of paper

Originally Posted by David198502

so the doc you provided states a difference of more than 50kph between open and closed rads.

Nope..

Not based on the numbers I read, i.e.

(left) 520 - 530 - 540 - 550 - 560 (right)