From: Richard (metal@fullwave.com)
Date: Thu Dec 04 2003 - 19:16:53 PST
man, all I can tell ya is that 10' long ramps
capable of safely supporting that thing, including
the shock-loading when it backs off the bed, tilts
through the air, and LANDS on the ramps...will
be REALLY heavy. <g>
I have a pair of 8' ramps that we used for driving
a TLB (JD410 backhoe/loader) onto a 2' high trailer.
They are 200+ lbs each, and even they did develop
a sag after a year's use.
Plan on having help moving the ramps fer sure <g>
I drove a 7-ton Michigan wheel-loader up onto a
tilt-bed truck this fall, cuz the winch didn't have
enough oomph, and I'll tell ya, I did not enjoy it! <g>
Had to have been 30 degrees....tires hanging over
the deck-sides....yuck.
If it was me, I'd make those ramps the full length
of your bed...i.e. as long as practical. I would also
design them with a center support to the ground;
and with VERY stout attachments where they hook
to the bed-end. Good luck with it. What an impressive
monster that'll be pulling into the fairgrounds <g>.
re; Diesel
The fuel does not "explode instantly" when it's injected.
There is what's called "ignition lag" in a diesel. It's
the time between injection and first burning. It's been
proven that the fuel MUST evaporate before it can
burn; so the rate of burning is limited by evaporation
rate, which is limited by droplet-size, among other
things. Good fuel-air mixing is also very critical in
a diesel.
This is why they keep going to smaller and smaller
nozzle orifices and higher and higher pressures. To
get the the droplet size down...in the search for higher
rpm's.
HP = torque X rpm And the only way to run faster,
while still being efficient, is to speed up the mixing
and burning process. Thus, smaller drops.
As a general rule, the longer the ignition-lag, the more
violent the burning; as more fuel is in the vapor-state
when the flame begins. If the engine is making severe
"diesel noise", it may be a timing issue. Early injection
tends to cause long ignition-lag. One usually wants to
advance the timing just to the point where noise begins
to pick up. Slight amount of noise is good. Lots is bad.
hope this helps,
Richard
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