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Darrell Tomer Brake Bars

Tomer 4 Tomer 3 Tomer 2 Tomer 1 Tomer Brake Bars

Tomer #1

Tomer Brake Bars

Tomer #2

Tomer #3

Tomer #4


Tomer #1
(#475)

Darrell’s comments:

This was my first attempt to make a brake bar that wouldn't heat up. It was fastened to a carabiner by a screw that went in the end of the longest leg. I decided the fins were running in the wrong direction as the relative wind on descent would usually be vertically upward.

My Comments:

The screw has been lost, so I need to find a replacement.

There are fins on the back as well. The fins are not optimally shaped. I suspect that the fins don't do nearly as much as the extra mass unless one uses a water bottle to cool the brake bar, since the convective heat transfer coefficient probably isn't all that great.


Tomer #2
(#476)

Darrell’s comments:

The next version of fin cooling. It is put on the carabiner by taking out the little screw and sliding the mutilated cotter pin a bit. It seemed a little crude.

My Comments:

It isn't clear in the photo, but there are fins on the left and right sides as well as the back.


Tomer #3
(#477)

Darrell’s comments:

This one works a little nicer. To open it for rope insertion, press the end of the round pin.

My Comments:

The pin Darrell refers to is spring-loaded. Note the sleeves that keep the carabiner gate from ever opening.


Tomer #4
(#478)

Darrell’s comments:

Why I made one for a pear carabiner I have forgotten. It locks on the carabiner with a simpler system, but the retainer wire tip needs to be filed off just a bit to make it work easier.

My Comments:

The wire retainer appears to have been made from a large cotter pin.