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Mangonel catapult
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Types: Machines
Machine Categories: Basic
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370.102 KB
May 12, 2019 @ 10:18am
Jul 14, 2019 @ 8:39am
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BiBi
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Mangonel catapult

Description
UPDATED a small catcher:
use arrow keys and right ctrl to control

This may be a first realistic torsion method catapult in Besiege.

Able to throw almost everything
must be very careful with bombs (winch fewer rounds)
not capable of fireballs till present
blocks:128
controls:
I J K L - drive
, . - use grabber
n m - rope winch
v - fire
how to fire?
1. pick an ammo (reversing the mangonel and lay down the grabber to pick an ammo)
2. hold n until the bucket is attached
3. put the ammo into the bucket (press . to detach the ammo)
4. hold m (max range is two rounds, watch the winch beside the back wheel! You can also control the range by fewer rounds)
5. press v to fire!
Sometimes it can't sustain itself's huge power, the reasons are:
1. It's the first time you play with this machine, Besiege's simulation always makes mistakes in first time. In most situation can fix in second time.
2. Everyone's computer environment is different, if always can't fix this. Use invincibility please.

The Mangonel works by pulling a long arm with a bucket attached down form its 90o angle of equilibrium. By doing this we store the potential energy of the catapult in the tension in the ropes and the arm. The tension is stored much like in a spring, therefore the equation of potential energy is the same as the for the Ballista. The k constant must be determined experimentally by find how much force is required to move the arm back a certain distance F=kx. The x is how far back the arm is stretched.
14 Comments
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Dihnin Jul 18, 2019 @ 4:27pm 
@Age of mike
You are truly a medieval Engineer
ArmouredKnight May 21, 2019 @ 5:06pm 
I would love to see a boulder ballista.
nico May 19, 2019 @ 1:18pm 
hum are you underestimating the power of the trebuchet, best medieval siege weapon?
Ibeatmywife420 May 19, 2019 @ 1:10pm 
yes yes yes yes yes
Ross P. May 19, 2019 @ 1:42am 
When Besiege was first introduced, the main thing to build in it was a catapult to beat the zones.
But I haven't seen an original medieval catapult in some time, so I was really happy to find this!
This design in particular is really enjoyable to operate and watch, and feels very true to Besiege's medieval theme. Truly great work! 😃
BiBi  [author] May 18, 2019 @ 6:40pm 
@Age Of Mike
Wow you know so much, I've learned a lot.
Age Of Mike May 18, 2019 @ 10:30am 
I'll get into more engineering terminology here:
What is present: a bending arm is drawn back, bending it, and storing energy. When it is released, a restorative moment is applied, returning the arm to its starting position/shape and throwing the projectile. Getting into explaining the deformation of the arm would be a bit difficult in a short format, so I'll leave it at that.
In a torsion spring: It's a bit more complex due to some bending being mixed in, but in short the 'spring' is twisted, storing energy, and produces a restorative moment at the BASE of the arm.
Notable formulas: tau = -kappa*theta [torque:tau, torsion spring const.:kappa, angle of twist:theta]
U = 0.5*kappa*theta^2 [U:potential energy]

Once again, still a great Besiege creation, showcasing several great techniques!
Age Of Mike May 18, 2019 @ 10:30am 
@IphoneWagen
To settle the question, torsion is when something is twisted about an axis (generally by a torque applied about the axis). Trust me, I'm a Mechanical Engineer.

In the case of a torsion catapult, torsion was used in torsion 'springs', in which energy is stored by pulling back the arm, and in the process, twisting a number of ropes or something similar around the axle on which the arm pivots.
Conventionally the name Mangonel can be used for a range of stone throwing siege engines, but is generally used to refer to a traction trebuchet (which, I'm sorry to say, does not use torsion at all) Perhaps, the term Onager would be more fitting, or maybe even leaf-spring catapult (but the base of the arm is not fixed so not quite). You may be able to tell I'm also a medieval engineering fanatic.
Age Of Mike May 18, 2019 @ 10:27am 
Certainly a reasonably accurate siege weapon. Also, you did a great job making an arm that can bend rather far before breaking; stores plenty of energy. Good job!
kau pahal gila May 17, 2019 @ 7:50am 
is this tabs