On 24.3.2011 21:27, izgo wrote:
> Tapio rubber tests show 09/2009 only 5% less than TanII 05/99, so the
> may and june batch are a bit superior. hope this one is even closer than
> that.
Unfortunataly I did not get any 2009/05 or 2009/06 batch to test, but
the 2009/01 and 2009/09 test quite similar, both within a half procent
of each less than half procent from the best SS that I had tested
before, the 2004/04. I actually managed to get a few pounds of 2011/01,
and this tested ever so slightly better than 04/04. Unfortunately, while
I was e-mailing FAI model supply, that batch was already sold out...
But to summarize it seems to me that 2009 was consistent in the rubber
quality, and SS has reached the best level it has ever been, that 5.5%
below the 1999/05 batch energy return. So you still may see difference
to Tan II, but I doubt that you could really tell the difference between
the good batches of SS.
The attached picture includes the test for 11/01. Note that the error
bars indicate +- one standard deviation within the batch. However, this
is calculated _before_ temperature correction, and as some TanII batches
(especially May99) are tested in multiple small batches over a long
period of time and varying temperatures, the larger standard deviation
rather reflects the temperature effect. Within each sample batch, the
variation in the energy return was consistent (less than 1%), so even
99/05 does not seem to have any variation to consider within the batch.
-Tapio-
- application/x-ygp-stripped attachment: stored
Received on Thu Mar 24 2011 - 21:34:46 CET