Bois d'Arc is an MOR/MOE Study
In a recent episode of the WoodTalk podcast someone asked about making a bow. I decided to use that question to delve deeper into what makes a good species for a bow. This bow wood discussion is a good example of using the technical properties of wood in context to solve an application question. My thought is that a further understanding of the application you need will lead you to examine the technical properties that make it possible. Eventually helping to discover all manner of species that will serve you well for your particular application.
In this case bending strength to allow the bow to flex and stiffness to add force to throw the arrow forward as the bow straightens out. Or, MOR and MOE. Osage Orange is also known as Bois d'arc or Bow wood and when you examine the properties of this and other well known long bow species like English Yew you can understand the magic mix of bending and stiffness. This knowledge allows you to find other species that have the same properties.
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Shannon I have gone all Matt Cremona. I
have several thousand bf of oak, red maple, ash, cypress, hackberry, and sycamore. Probably missing something but I have 2 probably easy to answer questions but I am finding 20 answers for each. I am building a solar kiln to finish drying the lumber and I want to sanitize it for bugs before I bring it into my shop for storage. My questions are how dry before I can stack without stickers. And what do I have to get the core temperature and for how long to be sure that it is big free. Thanks in advance and I really love the show.
HI Shannon. When replying to a listener’s question about moving lumber from Florida to Arizona, you did not mention possible issues with transporting air-dried lumber across state borders. This is definitely an issue in New England. Thanks for the great podcast!
Shannon,
lbf or lb subscript f is pounds force. Lbf/in^2 is psi or pounds per square inch. This designates between pounds force and mass because of the imperial system not wanting to use slugs as a measurement of mass.
Foot pounds which is a torque is ft-lb.
I’m not sure why Eric at wood database uses the more confusing notation for psi vs the one most imperial users are used to.