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Large scale test trebuchet
PaulsBods
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Nordrhein-Westfalen, Germany
Member Since: October 24, 2010
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Posted: Monday, June 04, 2012 - 02:45 AM UTC
Before I try to build a 1/72nd scale working vewrsion of a trebuchet I decided to try and learn a bit more about them..so I built a large scale version :-D


A couple more pics and two mini films of it in operation HERE
endrju007
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Wojewodztwo Podkarpackie, Poland
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Posted: Monday, June 04, 2012 - 09:41 PM UTC
What is the throwing range of this beauty?
Maki
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ARMORAMA
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Croatia Hrvatska
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Posted: Monday, June 04, 2012 - 10:25 PM UTC
Very cool. How do your neighbours like your new "toy"?

Mario
AJLaFleche
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Posted: Tuesday, June 05, 2012 - 06:32 AM UTC
Trebuchets are cool!

Now, how do you define working? If you mean the are pivots and the sling is loose, it can be made to work. If you mean it will propel an object, physics will limit you. The weight can't fall far enough to build up enopugh speed to throw the object any distance. Further, the mass of the weight might be too small to even counter balance the arm: again, physics.
PaulsBods
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Posted: Tuesday, June 05, 2012 - 07:32 AM UTC

Quoted Text

Trebuchets are cool!

Now, how do you define working? If you mean the are pivots and the sling is loose, it can be made to work. If you mean it will propel an object, physics will limit you. The weight can't fall far enough to build up enopugh speed to throw the object any distance. Further, the mass of the weight might be too small to even counter balance the arm: again, physics.


Working as in it actually will launch an object. I was going to make the Zvezda trebuchet into a working model..ie; one that throws but it would mean a lot of "upgrading" which would have completely changed the overall look so much that I might as well of built one (and a more historically accurate) from scratch.
PaulsBods
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Posted: Tuesday, June 05, 2012 - 07:34 AM UTC

Quoted Text

Very cool. How do your neighbours like your new "toy"?

Mario


Luckily they are on holiday at the moment. They seem to have got used to all the " Historical experiments" that have taken place in the last couple of years...they seem to have the attitude now of, "oh..hes trying to blow himself up again"
PaulsBods
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Posted: Tuesday, June 05, 2012 - 07:40 AM UTC

Quoted Text

What is the throwing range of this beauty?


it throws a 4-5cm stone 30meters. Its quite accurate..once its ranged in it will hit the same target area of about 1/2 a meter square 2 times out of 3. Now Ive built one..and any problems have been noted, I might build one twice the size..but more historically correct but first I will experiment a bit with this one...trying to launch flaming ammo etc. . The one in the pic is, with the arm up, 120cms tall
Imagine..one twice as big!!!!!
Maki
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ARMORAMA
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Croatia Hrvatska
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Posted: Tuesday, June 05, 2012 - 08:18 AM UTC

Quoted Text

Imagine..one twice as big!!!!!



Oh... hes trying to blow himself up again!

Mario
endrju007
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Wojewodztwo Podkarpackie, Poland
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Posted: Tuesday, June 05, 2012 - 06:41 PM UTC

Quoted Text

it throws a 4-5cm stone 30meters.


Does this distance include two broken windows when the projectile flew through your house?
Imagine building a real size one...
Hwa-Rang
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Posted: Tuesday, June 05, 2012 - 10:17 PM UTC
That is just COOL.
PaulsBods
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Posted: Wednesday, June 06, 2012 - 09:19 PM UTC

Quoted Text


Quoted Text

it throws a 4-5cm stone 30meters.


Does this distance include two broken windows when the projectile flew through your house?
Imagine building a real size one...


Id like a full size one...but where to keep it? and I think the local police "may" get interested as well
Luckily we have a very long garden..lucky for the neighbours
PaulsBods
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Posted: Wednesday, June 06, 2012 - 09:23 PM UTC

Quoted Text


Quoted Text

Imagine..one twice as big!!!!!



Oh... hes trying to blow himself up again!

Mario


The rocketplane for the new years celebrations two years ago ?
This year it didnt blow up as dramatically..in fact it survived (and I did) the flight..huge bang though.
PaulsBods
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Posted: Wednesday, June 06, 2012 - 09:25 PM UTC

Quoted Text

That is just COOL.


Thanks Jesper.
I may have found a way of making and launching fire balls..needs testing first though.
05Sultan
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Posted: Thursday, June 07, 2012 - 07:13 AM UTC

Quoted Text


Quoted Text

That is just COOL.


Thanks Jesper.
I may have found a way of making and launching fire balls..needs testing first though.


Aaahh! Re-inventing 'Greek Fire'
Did you know you can pay for neighbor's damage with PayPal? Nice accuracy on that size!
Cheers!
PaulsBods
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Posted: Thursday, June 07, 2012 - 09:09 PM UTC

Quoted Text


Quoted Text


Quoted Text

That is just COOL.


Thanks Jesper.
I may have found a way of making and launching fire balls..needs testing first though.


Aaahh! Re-inventing 'Greek Fire'
Did you know you can pay for neighbor's damage with PayPal? Nice accuracy on that size!
Cheers!


Thanks.
The accuracy seems to depend on the stone being thrown having the roughly the same size and weight each time
Im going to make a form and use basic modelling clay to make some "mass produced" shot....but my treb is way smaller than anything back then which makes me wonder, how they did this way back then ?..
.A set of big scales..like two flat boards with one stone as the counterweight and then every stone to be fired was rolled on or did they just chisel the shot into the same shape ..using a form or externa callipers to get a consistant size? .