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@BigH
Quick bit of research while I'm supposed to be doing boring uni work, proves that there are two models, one track and one road, but the track did have variations in degree. Heres a quote from Hilary Stone
"Three basic stem designs were offered: road with 73 degree angle between quill and extension, the no 2 track stem with a 65 degree angle giving a slightly steeper drop, and the no 3 track stem, sometimes referred to as Sacchi in the 1950s and later called the Sprint, with a 58 degree angle and a very steep drop."
Ive folded a piece of paper to a 45' angle. Then folded it to the angle where it matches the stem and at the ctc distance of 10cm it is 25mm from the 45' fold
If anyone could make any sense out of that, could they work out the angle for me please? I would presume its the sprint version judging by eye?
Used to be kinda good at doing origami penguins I'll have you know..
http://www.giladorigami.com/P_Penguin_Kasahara_Mundo.JPG
From bike pron, this is missing version 2 but still a good read.
http://2.bp.blogspot.com/-qV9HVJYfWs4/TtjGkg5JKSI/AAAAAAAASuU/vFXWU3Q_p4E/s1600/Cinelli%2B1958%2B1.jpg