Page 53 - Mark Gommers "Bowlines Analysis
P. 53
Figure 16a Figure 16b
Collar
The version of the Bowline
is shown in Wright &
Magowan's 1928 paper to
the Alpine Club. Heinz
Prohaska referred to it as a
‘Double Bight Bowline’. It
also has 3 rope diameters
which are encircled and
compressed by the nipping
loop. Of interest, Dan
Lehman refers to this form
as a ‘Janus Bowline’.
Collar
3 rope diameters
within the nipping
loop
Double Bight Bowline Double Bight Bowline
(Janus bowline) (Janus bowline)
[Conventional view]
[Detail view]
Figure 17a Figure 17b
This variation of the
‘Janus’ was suggested by
Dan Lehman. It also has 3
rope diameters which are
encircled and gripped by
the loop. This structure is
vulnerable to ring loading.
Cowboy Janus Cowboy Janus
variant variant
[Detail view] [Conventional view]
Page 52 of 59 Bowline Analysis Version 2.7a 16 July 2016 © Copyright Mark Gommers
