# [tcb] Re: Can a collision move the engine?

• From: "Fred McDonald" <texasbluebus@xxxxxxxxx>
• To: <tcb@xxxxxxxxxxxxx>
• Date: Wed, 15 Oct 2008 11:20:24 -0500

```Best explanation yet!
And don't forget at impact there was an enormous blast of Gamma Radiation when
small star collapsed on it's self creating  the black hole in the engine
compartment frying the electric ignition.
----- Original Message -----
From: Will Wood
To: tcb@xxxxxxxxxxxxx
Sent: Wednesday, October 15, 2008 10:59 AM
Subject: [tcb] Re: Can a collision move the engine?

Issac would point out...

V^2 = U^2 + 2as

at 15mph (24.014 kph) gives a velocity of 6.7 m/s gravity is 9.8 m/s^2 and
assume he stopped in 1 meter.

This gives an approxmate G-Force of 2.3G  on impact.  If we assume the engine
/ transaxle wheels/brakes/axles etc all suspended from and including the
torsion housing is 500 lbs the force would be as much as 1150 pounds of force.
YMMV.

Now, I think Denis was traveling faster than 15mph because since he was
hitting a tree (or about to) he was experiencing time displacement.  Time was
slowing down for him.  Given Einstein's General Theory of Relativity and his
quotation from a few years after:

"For an observer falling freely from the roof of a house there exists, at
least in his immediate surroundings, no gravitational field. Indeed if the
observer drops some bodies then these remain to him in a state of rest or
uniform motion... The observer therefore has the right to interpret his state
as 'at rest' at least until he hits the ground!. "

From this we can assume that Denis was going close to the speed of light
until he hit the tree.  He has no way of truly knowing his velocity at the time
because the objects around him were in a state of rest or uniform motion.
Therefore the G-Force impact would go to near Infinity and thus he created a
mini black hole causing his pulley to bend.

-----Original Message-----
From: sammie smith
Sent: Oct 15, 2008 11:07 AM
To: tcb@xxxxxxxxxxxxx
Subject: [tcb] Re: Can a collision move the engine?

My experience (and I've had and seen a lot of it) is that the first
thing in an accident to go is the front tranny mount.  The second is the nose
cone of the tranny.  Unless there is some prior damage or rust rot the chances
of the frame bending in other than a really total wipe out is nil.

--- On Wed, 10/15/08, Will Wood <evilscientistboo@xxxxxxxxxxxxx>
wrote:

From: Will Wood <evilscientistboo@xxxxxxxxxxxxx>
Subject: [tcb] Re: Can a collision move the engine?
To: tcb@xxxxxxxxxxxxx
Date: Wednesday, October 15, 2008, 8:57 AM

I've seen the entire rear torsion assembly shift after a front end
collision, now the other damage could be caused as a side effect.  Things
being what they are the frame rails are probably 1/4 to 1/3 less in
strength than when the left the factory so any collision could cause an
accordion effect.  I had a single cab that
one day I tried to jack it up on the frame support rail and it
crumpled.  As they say, they don't get better with age.

-----Original Message-----
From: sammie smith
Sent: Oct 14, 2008 9:26 PM
To: tcb@xxxxxxxxxxxxx
Subject: [tcb] Re: Can a collision move the engine?

There ain't no way the tree caused the pulley problem; or
any other engine damage.

--- On Tue, 10/14/08, Denis Dodson <coocoo@xxxxxxx> wrote:

From: Denis Dodson <coocoo@xxxxxxx>
Subject: [tcb] Can a collision move the engine?
To: tcb@xxxxxxxxxxxxx
Date: Tuesday, October 14, 2008, 5:48 PM

I have done absolutely zero work of maintenance on
Murray's mechanicals since the tree kissing. When ever I did start him to move
him a few yards while doing the body work, there was a banging noise that I
thought was the tailpipe banging against the body metal. When Chuck and I were
replacing the electronic points with real points, I noticed that the crank
pulley nut was loose. It took a few turns. I also had to push the cooling tin
away from the pulley. When I started the engine with Chuck looking at the
engine we found that the pulley is way wobbly.

There was no problem before the crash. I say that I was
going, maybe, 15 MPH when I hit the tree, because I can't think that I was
going much faster, maybe I was.

The question is, would a front collision cause the engine
to move forward, maybe 1/4-1/2 inch? How hard would I have to smack to cause
the engine to go forward far enough to bend the pulley?

Let's all make a wish that the crank wasn't damaged. I'll
know tomorrow, maybe.

```