Junkyard Wars    TV Series

~ APRIL 2003 ~
 'Laundry Launchers' 

This semi-final contest pits previous winners the Super Chargers against the High Flyers. All they have to do is launch Tyler's shorts the farthest. Simple, right? Very simple except Tyler's shorts are inside a 150 pound washing machine. Each team gets three tries to throw the washing machine the farthest. No engines are allowed so they will have to figure out a way to store the energy then fling the washer forward. Whoever gets it the farthest advances to the finals.

The Super Chargers want to build a catapult. With a truck frame for a base and a large steel arm attached to a winch to pull it back, they will fling their washer forward. By twisting steel wire around the base of the arm, that will store the power to fling the washer. It's a simple design but finding enough steel wire (that is in solid condition) could be tricky. Also, the welds will have to be super strong because the forces will be massive when the arm is winched back.

Initially the High Flyers were going with a massive slingshot. By attaching cord to the leaf springs on a car (all attached to uprights on a solid base) a lot of power could be stored and let go. The team didn't think they could find big enough leaf springs so they're going with a trebuchet. We've seen many trebuchets before, but a quick run down anyway. Two a-frames support an arm with a big weight on one end and the washer hooked to the other end. The weight swings down and the washer is flung over the top and forward. It's gonna be big and it's gonna have to be strong.

Super Chargers expert 
Antoni Feldon
High Flyers expert 
Rob Valentine
The Super Chargers want to 
build a washer catapult
The High Flyers' expert wants to 
ping the washer
But the team would rather 
fling the washer
By cutting and stretching this cart, it 
will hold the washer in the catapult
These poles will make a great arm
And this trailer will work as a base
The High Flyers clear some junk away 
from this truck so they can use...
...it's heavy chassis for the base of 
their trebuchet, which is their plan
Judge Tony Swatton
Reams of cable will will put the 
fling into their catapult
This winch will wind that massive arm 
back into position
By using a car axle, the High Flyers 
have a pre-built pivot
By using these hubs, it will be easier to 
wind the cable into a torsion spring
The weld holding the arm to the pivot 
is critical and must be done with care
Supports are necessary for the 
High Flyers trebuchet
By filling this tank with sand, the catapult 
should keep from flipping over
The Super Chargers'
Chunky Catapult of Calamity
The High Flyers'
Truly Tremendous Trebuchet
The High Flyers are first and the
safety guy gives the all clear
It's up and...
...at 48 feet, It's Good!!
The Super Chargers are ready and
they load up for shot #1
However, slack in the wire is a no go.
The High Flyers add more weight and
adjust their hook for more distance
It flies through the air with the
greatest of ease...
Kapow! It lands solidly and lands
69 feet from the start
The catapult is ready for try #2
and a little more action but no distance
It's primed and the safety tech
scurries away
Oh! It hits the 2nd one and rolls for
quite a distance but the rolling doesn't
count. It flew 72 feet through the air
For the final attempt, the Super Chargers
are just going to pull it back and let fly.
The frame twisted under the enormous
pressures of the arm being drawn back
And it flies...for 1 foot.
The High Flyers win it!

These pages borrowed from.... http://jyw.tacorp.net/usseries5/laundry/launcher.html

Email: michco@shiretech.net
This page and all photos are copyrighted © by Shiretech Web Design.
All pictures from September, 2001.
Please ask us for permission to use these photos.