On Mon, 08 Feb 2016 22:24:02 -0500, Micky
wrote:
On Mon, 8 Feb 2016 09:06:10 -0800 (PST), DerbyDad03
wrote:
On Sunday, February 7, 2016 at 6:28:38 PM UTC-5, Jeff Wisnia wrote:
DerbyDad03 wrote:
On Sunday, February 7, 2016 at 12:41:15 PM UTC-5, Jeff Wisnia wrote:
DerbyDad03 wrote:
First, let's assume a couple of things:
1 - The downward force of a GDO might be enough to injure or even a kill
a very small child.
2 - The neighbor boy that one might want to kill is going to be older than
a very small child. I mean, the kid has to have done something one might
consider worthy of killing for, right? So, he's probably a teenager or
young adult.
All right, with those 2 assumption in play, is the downward force of a GDO,
even set at maximum downforce, enough to actually kill a teenager/young adult?
It isn't just the downforce setting, it's also the inertia of the door.
Our garage doors are wood, and weigh well over 200 pounds each, which
makes for a lot of kinetic energy when they are in motion
.
You are talking about a case where the door is not being controlled by a GDO.
In your OP, you said that you tried adding your strength to GDO as it was closing and Micky asked that if that had worked (basically defeating the sensors
and allowing the door to close even with a blockage) woluldn't tht be a way
to kill the neighbor boy.
There is very little "kinetic energy" when the door is being lowered with the
GDO because the GDO is holding it back.
I'm scared to think of what would happen to the kid's skull if he was
lying in just the wrong spot so his head was on a concrete floor and a
moving door came down on it.
That's my question. Even at the highest downward force setting, I believe
that the door will eventually reverse when it hits an obstruction. The
Assuming that circuit is working.
downward force setting is there to overcome things like a cold, stiff door,
maybe a track that is slightly out of alignment, etc. It's not there to drive
the door down through the pavement.
So my question remains: Can a garage door that is being controlled by a
GDO actually exert enough force to kill a teenager/young adult?
Perhaps not. My goal would be to kill smaller children so that's not
really a problem for me.
Re my "kinetic energy" comment, it might be interesting to put a coconut
(in place of a real kid's skull.) on the concrete where the door comes
down and see what happens to it.
I doubt if the downforce reversing of the opener can happen fast enough
to overcome the inertia of the moving door and "save" the coconut.
No way to tell what the downward is set at in this video or what would
have happened to a skull or coconut.
https://www.youtube.com/watch?v=7uFl6cNUh04
This is the video that ran automatically after the one above:
https://www.youtube.com/watch?v=MxuS7J3eEnA
It looks like a very expensive house with a custom garage door that
opens sideways, and perhaps servants. Well it's hard to tell if those
people were already there or how long it took until they came, the
girl in the blue smock, the guy in the yellow overalls, and the one
who looks like a nurse. The guy with the tie seems like the husband.
BTW...I don't think I coconut is a good substitute for a skull. I think a
I think a coconut is a lot stronger than a child's skull.
skull would pop/deform long before a coconut would.
That would be almost good enough. If I coudln't kill the young man, I
could at least arrange it so he needed help to eat.
Maybe we need Jamie and Adam to build us a skull analogue.
Plus it can land on their chest, or their back behind their chest, so
that it doesn't have to crush anything, just prevent inhaling.
Do you know what fail-safe is? Your system is fail-unsafe.