Yes, but would you get up at 3am to stoke it

At 20:24 30 October 2003, Tango4 wrote:
I love it! The boiler could provide the permanent thermal
off the top of the
launch too!

Ian

'Bob Johnson' wrote in message
...
Hi Bruce --

That's a very welcome correction to my hazily-remembered
version of a
second-hand report of what the 454 c.i. engine torque/hp/rpm
chart looks
like. This is the kind of info I was looking for and
thanks for providing
it!

In all our past kicking around of the ideal winch
prime mover, here's one
that sounds silly but might rate at least an engineering
investigation --
a
recip steam engine! If I recall correctly, the steam
engine develops max
torque at stall.

What got me thinking about that was the fact that
the Navy gets 66,000 lb
Super Hornets flying in about the same three seconds
that it takes us to
get
airborne. And they do it with steam, not because it's
handy, but that's
probably the only practical way to get it done.

BJ

Bruce Hoult wrote:

In article ,
Bob Johnson wrote:

Our engine is petrol fueled. Despite Google's best
efforts, I have not
yet located a Torque/HP/RPM curve for our very common
7.4 L engine,
but
have heard that it develops max torque and HP at
about 3000 RPM and
further that the curves are fairly flat at this
point.

You are making some totally contradictory and inconsistent
claims there.

If max torque and max HP occur close together then
they must both drop
off precipitously after that.

If the torque curve is flat then HP will be increasing
linearly with
RPM, max torque and max HP will be very far apart.

It is quite likely that you do have maximum torque
at around 3000 RPM,
but if for example the torque curve is flat enough
that the torque at
the 5000 RPM redline is still 60% or more of that
at 3000 RPM then that
(redline) is exactly where maximum power will be.

-- Bruce