rolling.html: Note that the results are unreliable under some circumstances.

[dep-ui] / rolling.html

diff --git a/rolling.html b/rolling.html
index c73cd96..1feb248 100644 (file)
--- a/rolling.html
+++ b/rolling.html
@@ -148,8 +148,9 @@
        DEP_UI.add_elt_class(DEP_UI.elt('js-note'), 'conceal');
 --></script>
 <p>This page is only really interesting because it contains a Javascript
-program.  You seem to have Javascript turned off, so it won't work very
-well.
+program.  You seem to have Javascript turned off, so it won&rsquo;t work very
+well.  It only requires first-party scripts;
+see <a href="#privacy">Privacy</a> for more details.
 </div>
 
 <h3>Background</h3>
@@ -172,9 +173,14 @@ of it you need to create the required starting size that you can then
 roll down to the required thickness of strip.
 
 <p>For best results, roll the strip in as few passes as you can handle.
+The results aren&rsquo;t accurate for broad, thin strips.
+Width-to-thickness ratios of up to 6:1 are known to be good; ratios of
+12:1 or more don't work: strips don&rsquo;t get as wide as predicted by
+our model.  We need to collect more data and construct a better model to
+handle this case properly.
 
 <p>You can see the <a href="rolling-eqn.html">detailed equations</a>
-used for this calculation if you're interested.
+used for this calculation if you&rsquo;re interested.
 
 <h3>Use</h3>
 
@@ -214,10 +220,21 @@ version.
 about them.  Please <a href="mailto:mdw@distorted.org.uk">mail me
 patches</a>.
 
-<p>The JavaScript machinery on this page was written by Mark Wooding;
+<p>The Javascript machinery on this page was written by Mark Wooding;
 the text was written by Mark Wooding and Gary Wooding.  The data used
 to derive the computation was provided by Gary Wooding.
 
+<h3 id="privacy">Privacy</h3>
+
+<p>There are no cookies or other trackers here.  This page does not use
+externally hosted scripts, fonts, images, or anything else.  The server
+has logged your IP address, which helps me fix things if they go wrong;
+mostly things work fine and the logs are discarded after a couple of
+weeks.
+
+<p>Most web browsers can save a version of this page which can be used
+offline.
+
 </div>
 </body>
 </html>