LR - Ballista webpage

[Adam Harrison]

Just noticed another thing, the aiming device on this ballisa blows chunks.
There's no way to adjust horizontal aim without moving the whole friggin
thing!  Better to go with a universal joint, which is just as easy to make,
and a heck of alot better....



----- Original Message -----
From: Adam Harrison <hookshot at star-telegram.com>
To: <loch-ruadh at ansteorra.org>
Sent: Thursday, April 27, 2000 8:27 PM
Subject: LR - Ballista webpage


> The is the webpage I mentioned in my last email.  The design is simple and
> it works from an SCA standpoint.  It uses a bungee cord for the
"bowstring"
> and is not tortion powered.  The author claims to be able to build this
> thing for less than $100.
>
> I don't particularly like the design, but it is a starting point.
>
> http://jim-diana-hart.home.att.net/ballista.html
>
>
> The first thing I would do is scrap the "prod" idea he has(which is NOT
> period, as in "none of the sources I have looked at show them").  His
design
> ends up looking like a giant crossbow on a stand.  The closest thing to it
> is a gastrophetes or "belly bow"  which is a_giant_crossbow, and was not
> mounted on a stand(that I know of).
>
> to replace the prod I would build a box frame that looks like the period
> ballistas I have seen.  The bungee cord, or surigcal tubing, or whatever
can
> be attached to the prods that power a tortion design.  these prods would
not
> be able to move.
>
> What I have just described is the style of engine that the majorty of
> engines at Gulf Wars  were this year.
>
> I want to build a true tortion design, but that may be outside our
> capability.
>
> -Bjorn
>
>
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