It's really toy-sized, but it could be scaled up to fling, oh, say, a
Volkswagen.

From Popular Mechanics
http://www.popularmechanics.com/home...?click=pm_news

On Sun, 12 Aug 2012 20:18:34 -0500, "HeyBub"
wrote:

It's really toy-sized, but it could be scaled up to fling, oh, say, a
Volkswagen.

From Popular Mechanics
http://www.popularmechanics.com/home...?click=pm_news


Ever since Northern Exposure, I've been a Trebouchet fan--
http://www.trebuchet.com/

Seems like the end of every season they'd fling a pumpkin-- or a VW--
or a piano.

Jim

In article ,
Jim Elbrecht wrote:

On Sun, 12 Aug 2012 20:18:34 -0500, "HeyBub"
wrote:

It's really toy-sized, but it could be scaled up to fling, oh, say, a
Volkswagen.

From Popular Mechanics
http://www.popularmechanics.com/home...arly-adopter-b
uild-this-onager-catapult-11556480?click=pm_news


Ever since Northern Exposure, I've been a Trebouchet fan--
http://www.trebuchet.com/

Seems like the end of every season they'd fling a pumpkin-- or a VW--
or a piano.

Jim

Ah, the Pumkin Chunkin Annual Contest for such devices is only two months away

On Sun, 12 Aug 2012 20:18:34 -0500, HeyBub wrote:

It's really toy-sized, but it could be scaled up to fling, oh, say, a
Volkswagen.

From Popular Mechanics
http://www.popularmechanics.com/home...working/early-
adopter-build-this-onager-catapult-11556480?click=pm_news

My boy and I homebrewed one for a school science fair project of his a
few years ago; it was only about 9" long but would happily throw things
20' or more.

As for trebuchets, there's a nice one at Warwick castle in the UK,
complete with winding treadmills, for anyone who happens to ever be over
that way. (http://www.patooie.com/temp/warwick_trebuchet.jpg)

cheers

Jules

"HeyBub" wrote:

It's really toy-sized, but it could be scaled up to fling, oh, say, a
Volkswagen.

From Popular Mechanics
http://www.popularmechanics.com/home...?click=pm_news


So here is the results of this afternoon in the shop.

http://douglasjohnson.org/pictures/Onager.jpg

This is a great project with my grandsons, 6 and almost 4. It pops pecans about
20 feet.

I ripped a 2x down to 1x1s. The older one watched safely out of the way with
safety glasses and ear muffs. Then he learned to read a tape measure as we
marked and cut to length. We also had to make a Lowes run to pick up screws and
the gate latch.

Then the three of us took turns spreading glue, drilling pilot holes, and
driving screws. Grandma donated a wooden spoon to use as a throwing arm. That
worked great.

As built, the pecan comes off the arm in very flat trajectory. You can double
the range by tilting the front up so the pecan comes off at about 45 degrees. It
wouldn't be hard to built a frame base to make that happen.

I know you often say "It's for the children" sarcastically. Not this time.

Thanks,
Doug

On Wed, 22 Aug 2012 18:52:51 -0500, Douglas Johnson
wrote:

"HeyBub" wrote:

It's really toy-sized, but it could be scaled up to fling, oh, say, a
Volkswagen.

From Popular Mechanics
http://www.popularmechanics.com/home...?click=pm_news


So here is the results of this afternoon in the shop.

http://douglasjohnson.org/pictures/Onager.jpg

This is a great project with my grandsons, 6 and almost 4. It pops pecans about
20 feet.

I ripped a 2x down to 1x1s. The older one watched safely out of the way with
safety glasses and ear muffs. Then he learned to read a tape measure as we
marked and cut to length. We also had to make a Lowes run to pick up screws and
the gate latch.

Then the three of us took turns spreading glue, drilling pilot holes, and
driving screws. Grandma donated a wooden spoon to use as a throwing arm. That
worked great.

As built, the pecan comes off the arm in very flat trajectory. You can double
the range by tilting the front up so the pecan comes off at about 45 degrees. It
wouldn't be hard to built a frame base to make that happen.

I know you often say "It's for the children" sarcastically. Not this time.

Thanks,
Doug

The children will love you forever with fond memories. Nicely done.
--

On 2012-08-22, Douglas Johnson wrote:

This is a great project with my grandsons, 6 and almost 4. It pops pecans about
20 feet.

Neat little project, but I don't get the wheels. What? Gonna be
drawn by a team of hamsters? Gonna enter it in a Pinewood Derby,
driven by Baron Otto Matic?

"You can do it, Tom boy"
nb


--
Definition of objectivism:
"Eff you! I got mine."
http://www.nongmoproject.org/

That does look fun. I don't have a wood shop, and I don't have two grand
sons. But, if I did, I'd sure build one of these. Looks like the kids are
having fun. And, it doesn't have electronic screen, and runs on lots of
batteries. Just good old imagination.

Christopher A. Young
Learn more about Jesus
www.lds.org
..

"Douglas Johnson" wrote in message
...

From Popular Mechanics

http://www.popularmechanics.com/home...?click=pm_news


So here is the results of this afternoon in the shop.

http://douglasjohnson.org/pictures/Onager.jpg

This is a great project with my grandsons, 6 and almost 4. It pops pecans
about
20 feet.

I ripped a 2x down to 1x1s. The older one watched safely out of the way
with
safety glasses and ear muffs. Then he learned to read a tape measure as we
marked and cut to length. We also had to make a Lowes run to pick up screws
and
the gate latch.

Then the three of us took turns spreading glue, drilling pilot holes, and
driving screws. Grandma donated a wooden spoon to use as a throwing arm.
That
worked great.

As built, the pecan comes off the arm in very flat trajectory. You can
double
the range by tilting the front up so the pecan comes off at about 45
degrees. It
wouldn't be hard to built a frame base to make that happen.

I know you often say "It's for the children" sarcastically. Not this time.

Thanks,
Doug

On Wed, 22 Aug 2012 18:52:51 -0500, Douglas Johnson
wrote in
Re DIY: Build a
Onager Catapult:

"HeyBub" wrote:

It's really toy-sized, but it could be scaled up to fling, oh, say, a
Volkswagen.

From Popular Mechanics
http://www.popularmechanics.com/home...?click=pm_news


So here is the results of this afternoon in the shop.

http://douglasjohnson.org/pictures/Onager.jpg

This is a great project with my grandsons, 6 and almost 4. It pops pecans about
20 feet.

Good one. I like the use of the wood spoon.

"Oren" wrote


The children will love you forever with fond memories. Nicely done.
--

Last visit, my two grandboys helped make puzzles. The six piece three pole
pyramid types that you move one pyramid to the other pole without stacking a
larger piece on a smaller one, and moving only one piece at a time. They
got to help sanding the discs and drilling and gluing. Man, they figured
that one out FAST. They are 6 and 9. They took them to school, and shared
with their class. Gonna make them a ring puzzle that I will post pics of.
One of the most fun things we have done.

Steve

notbob wrote:

On 2012-08-22, Douglas Johnson wrote:

This is a great project with my grandsons, 6 and almost 4. It pops pecans about
20 feet.

Neat little project, but I don't get the wheels. What? Gonna be
drawn by a team of hamsters? Gonna enter it in a Pinewood Derby,
driven by Baron Otto Matic?

Two answers. I mean, how you besiege a sand castle without wheels? Tell me
that.

More seriously, the plans showed wheels, the boys wanted wheels, so we got
wheels.
-- Doug

They need a team of strong toy oxen to pull the catapult around.

Christopher A. Young
Learn more about Jesus
www.lds.org
..

"Douglas Johnson" wrote in message
...

Two answers. I mean, how you besiege a
sand castle without wheels? Tell me that.

More seriously, the plans showed wheels,
the boys wanted wheels, so we got wheels.
-- Doug

replying to Douglas Johnson, Anonymous wrote:
I don't know what the hell the wheels were for?!

--
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