Saturday, April 05, 2008

How to Build a Working Wood Catapult Toy Kit

This is the first in a two part series reviewing the working wood catapult kit made by Pathfinders. In this first part, I will tell you about the kit and give you some assembly tips. In part two, I'll tell you how I went about making the catapult look like it truly belongs on an ancient battlefield.

ThinkGeek.com offers more than one model; this review refers to the one advertised as "Catapult Kit". It sells for $19.99.

Where did kit come from?
The product is sold by ThinkGeek.com in their Geek Toys section under the Cube Warfare subsection by the name of Wooden War Engine Kits.


What do you get in the kit?
The kit comes with nearly everything you need to assemble the catapult. The only material you need to provide is white Elmer's-type glue. The kit comes with a small swatch of sandpaper and suggests that you have a ruler and scissors available. The kit arrived in a slender cardboard box with instructions and parts separated into two plastic bags. No excessive packaging, no impossible-to-open-plastic-clamshell. I like that.

The kit contains just over a dozen wooden parts, two washers, some string, a small bit of wire, and some soft Play-Doh type clay -- otherwise known as "ammunition".

The wood is a clear-grained pine. Just one of the pieces of my kit had a medium sized knot in it. It had been filled with a little plastic-wood type filler to keep things solid and smooth.

How were the instructions?
The instructions are printed in black and white on 8 pages. There are instructions in English, French, and German which is nice, though they are intermingled in a way that requires a bit of scanning and rescanning. I found the directions to be very good, though there were a few vague spots. I'll address these very minor pitfalls in the next section. The line drawings in the instructions are simple and clear and serve as the primary means of instruction.

What helpful hints do you have?
Overall, the kit itself took me a little over half an hour to make, though they suggest that you set aside 1 to 2 hours. The kit is suggested for ages 9 and up. That sounds about right to me.

Here are a few helpful hints for the assembling the catapult kit:
  1. Read the entire instruction manual all the way through, paying attention to the drawings. This won't take long and this will prevent any possible confusion.
  2. At first, I wasn't sure how to tell the crosspiece that the holds the trigger from the upright braces. It's quite simple really: just read the directions (I hadn't yet). Note that they have thoughtfully placed red marks on the crosspiece and the base with which it mates.
  3. The kit is held together with pegs that are glued in place. There are 18 total. Be sure to sift through the lot to find the two that a just a bit longer than the others. These are used to add tension to the string.
  4. I found that the pegs fit rather tightly. The glue helps to lubricate them a bit. I gently used a nonmarring hammerto tap the pieces together. Alternatively, you could use the included sandpaper to slightly taper the ends of the dowels and ease their entry.
  5. Add a safety/trigger - The trigger arm didn't always want to hold the throwing arm in place when under tension (OK, yeah...so maybe I have it wound too tightly). I rigged up a small diagonal piece of wood that fits in a notch to keep the trigger arm from swinging. By pulling this diagonal piece out, the trigger arm is free to swing and the catapult will fire. (See image below for my safety/trigger addition.)
  6. A small hobby or razor Sawis handy if you want to trim some of the dowels that are left a bit over the surface of a few parts.
  7. Consider staining and/or sealing your model to increase its beauty and lifetime. More on this in part 2 of this series.

So...does it work?
The packaging claims that the catapult can throw a soft clay ball over 15 feet. This is absolutely true. I easily achieved distances over 20 feet and don't think I have put undue strain on the model. Should you choose to add extra horsepower to your model (and this is just my speculation), I believe some added string and a reinforced crossbar would allow you to throw a grape twice as far as advertised.

The Verdict?
This is a well proportioned and historically accurate catapult. More specifically this is a mangonel variety of catapult that uses twisted fibers for its power source. I gather that many had a sling on the end rather than the spoon shape we typically see. (You can learn more about catapults from The Art of the Catapult: Build Greek Ballistae, Roman Onagers, English Trebuchets, and More Ancient Artillery)

Everything that was promised was delivered and the model outperformed the advertising copy. When was the last time you purchased a product that did that?

I give the Authentic Working Wood Catapult from ThinkGeek.com high marks.

What's next?
In the next installment of this article, I'll show you how to the catapult model look ancient and ready for a siege.

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1 Comments:

Anonymous Rocking Horse Plans said...

Would it be too geeky of me to tell you that I made one of these catapults up and recreated mock battle scenes from Lord Of The Rings? These catapults are superb, the detail is extraordinary especially when you consider how cheap they are.

March 28, 2011 at 5:06 PM  

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