You can choose a password length of not more than 50 characters. Do not forget to switch keyboard layout to the English. Do not choose a password too simple, less then 4 characters, because such a password is easy to find out. Allowed latin and !@#$%^&*()_-+=., characters
Create Free Account
Already have an account? Enter
Back
Welcome back!
Please enter all the fields
Incorrect login or password entered
Sign In
Forgot your password?
Don’t have an account? Create Account
Back
Forgot your password?
Please enter your Email
This Email is not registered in Simkl
Failed to send email, try again later
Don't worry. It's easy to reset.
Please enter your Simkl username or E-mail from your account to start the password recovery process.
Reset Password
We have sent instructions to the email address you provided during signup. Please follow the link from the email to continue.
A spear thrower is a simple tool that allows the user to throw a spear further than by hand alone. It is a small length of wood with a hook in the end that fits into a notch in the back of the spear. The extra power and distance gained by the thrower is due to the extra leverage it gives.
I cut a small branch with a minor branch coming off the side. I shaped the minor branch into a spur to fit into the end of the spear. The thrower was about 65 cm long.
For the spear, I cut a thin sapling approximately 2 m long and about 1.5 cm thick. I carved a cup in the end of the spear for the spur to fit into. Then I bound the back of the spear with bark fiber to prevent the wood from splitting. The head of the spear was simply charred in the fire and scrapped against a rock to sharpen it (during practice the head regularly breaks so only a sharpened tip is used to save work).
To use the spear thrower, the spur of the thrower is inserted into the cup of the spear. The spear and thrower are held at about shoulder height. The thrower is quickly flicked forward and the spear propelled towards the target. As the spear leaves the thrower it bends slightly storing energy until it jumps of the spur. During flight, the flexible spear wobbles and oscillates paradoxically giving the spear some stability in flight.
The throws in the video show what can be done in one afternoon of practice (my arm got sore and I wanted to start on other projects). I hit the target a few times at a distance 15 m. It is more powerful than a spear thrown by hand alone but is difficult to learn. The spear I made could have been a fraction lighter and so would have greater speed. Another improvement would be to add flights to the spear so it would be more accurate and fly straighter (like an atlatl).
The extra energy gained from a Woomera's (Australian spear thrower) use has been calculated as 4 times that of compound bow (Wikipedia). It's easy to make (this took less than a day) but requires lots of train
You can paste URL of the image inside
your comment and it will be
automatically converted into the image
when reading the comment.
Find a GIF
Create a Meme
How to add a video:
To add a video paste video url directly into your comment. Example:
https://www.youtube.com/watch?v=s7L2PVdrb_8.
Do not post links to copyrighted video content (TV Episodes,
Movies). Share them privately if
needed.