|Version A||Version B|
[ Top | Version B | Return to Misc. Descenders ]
|Front View||Rear View||Bottom View|
I acquired two Russian Tri-bollards from John E. Weinel, Inc. at the 1991 NSS Convention. I acquired another in 2017 as part of Bob Thrun's collection.
My Russian Tri-bollard is 101 mm. tall, 80 mm. wide, 22 mm. thick, and weighs 73 g. This lightweight aluminum device consists of three bollards and a cross piece riveted to a subtriangular piece of sheet metal. The lower bollard is 38 mm. in inner diameter, while the upper two are 11 mm. The lower bollard is cut away on the upper side, although it isn't clear to me that this is necessary or desirable (except to save weight), since it leaves some sharp edges that can damage the rope. These can be removed with a file.
Thre are no markings on this device.
The device is rigged by inserting a bight between the upper bollards and looping it over the lower bollard, then clipping the seat maillon through the lower hole. I find that the back of the device bends noticeably in use, but not enough to damage the device. The resulting friction is less than I prefer.
[ Top | Version A | Return to Misc. Descenders ]
|Front View||Rear View||Side View|
I acquired my Russian Tri-bollard, Version B from Philipp Molzer in 2013.
Version B is 72 mm. tall, 21 mm. wide, and 63 mm. thick, and weighs 60 g. The frame and cross piece are 2.9 mm. aluminum. The lower bollard is held in place with three slotted countersunk screws, while the upper two bollards are riveted in place. The lower bollard has a 43 mm major diameter and 29.3 mm. minor diameter, while the upper two are 118 mm. cylinders. The lower bollard is cut away on the upper side - this was done after it was screwed in place. There is a hook at one side to assist in locking off.
This one is considerably smaller than the previous version. The plate is heavier, and I don't notice any flexing.
[ Top | Version A | Version B | Return to Misc. Descenders ]