Various Collins Machetes

See attached In order from bottom to top are: Collins 128 Guatemala Collins 128 USA circa 1940’s Collins 128 with concealed tang circa 1920-1930 Collins MKII lightweight guatemala circa 1965 one of the last originals Collins USN MKII 1945 stamp Collins MKII could be WWII but it is a Colombian blade, has period sheath. GTK […]

Collins 128 Guatemala compared to a similar sized Dha

The attached drawing shows a large Dha compared to a reshaped Collins 128 Guatemala circa 1960-1965. I decided to recut the collins spine and angle the blade into a more forward sweep. The machete is designed to cut and slice brush and saplings not as a weapon and is used mainly as an agricultural implement although […]

Tracing of a 20″ Dha

The attached photos and drawing is a tracing of a 20″ (19.75 actual) burmese dha. These are a similar type of general purpose implements to machetes but are usually much lighter in weight. I could go on at length about this subject because I was trying to figure out how to get the maximum rotational speed in […]

Impulse Momentum Transfer

I borrowed a equation to calculate how much impact a tool of any kind has to try and figure out how strong to make a blade to trim some really tall hedges, similar to a California Pepper Tree, but in a hedge form. The results were interesting from a strength of materials standpoint.  If the math […]

Notes about steel: Solingen Steel

A academic paper regarding solingen steel from: http://www.academia.edu/319632/A_contribution_to_the_understanding_of_Solingen_steel_in_the_19th.century originally published by http://www.hanser-elibrary.com/loi/pm 110093_Dietz If the copyright holder does not want this posted here please let the website admin know and it will be removed immediately.