25 more posts in this thread. [Missing image file: wooden-shack-wallpapers_12403_1024x768.jpg]
OK guys, not exactly sure where I should post this, but fuck you I'm gonna post it here.
Anyway, let's say that I wanted to build a shack on about an acre of land somewhere in the US. Say I own the land, and apply for planning permission for it to be built. What regulations or laws would I have to meet in order for the shack to be legal?
I'm talking about something very small, about 20 square metre, maybe less. Obviously I would have no electricity, but I'd grow my own crops for food, have a fire for heat, etc.
79 more posts in this thread. [Missing image file: 114_recurve_bow.jpg]
Hey /diy/, this is my first time making something (apart from minecraft steve head) and I wanna make a bow and arrow.
I don't have a workbench and tools, no saw no clamps, NOTHING.
I wanna make something similar in the picture and I believe its called a recurve bow because of the shape. I need to know what type of wood and string is suited for this, with the lack of tools how am I supposed to do this?
>inb4 google it
wikihow and howcast wants me to be Robin Hood, I think you guys have a better idea here.
Trajectory of a Falling Batman
5 more posts in this thread. [Missing image file: batman-triangle(1).jpg]
Hello again, /diy/
Please begin by reading Trajectory of a falling Batman found here:
As you can imagine, building a functional personal glider such as one in similar size and shape to that of Batman's from Batman Begins would be a very coveted feat. According to authors Marshall, Hands, Griffiths, and Douglas, the glider (and Batman) as shown in Batman Begins would function quite well - carrying Batman twice as far as he falls. The problem comes when it's time to stop. Batman's glider in it's current design would reach speeds of 50mph (80kmh) as the Caped Crusader comes in for a landing, which would prove deadly to most if some sort of method for rapid deceleration is not used (such as a parachute).
The cape-glider, when rigid, is about half as tall as Batman and about twice as wide as he is tall. I'm now trying to find a design that would produce better lift and drag, bringing our would-be vigilante to a stop at a much more manageable speed. By doubling the height of the aerofoil, we double the aerofoil's surface area, or wing area. In order to figure out the horizontal and vertical speeds during decent, the paper says to use the formula for Lift and Drag, citing examples of how to reorganize the equation to better account for the value you're solving for.
I cannot solve these values for the life of me, and my project partner (who is much better at Trig than I am) is unavailable for the next 10 hours. Could someone please point me in the right direction?
tl;dr - Designing Batman's glider cape and Trig is breaking my brain - need help solving formulas involving Lift and Drag coefficients.