On Jan 8, 7:02*pm, "Existential Angst" wrote:
"jon_banquer" wrote in message

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On Jan 8, 6:13 pm, "Existential Angst" wrote:









"jon_banquer" wrote in message

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On Jan 8, 5:43 pm, "Existential Angst" wrote:

OK, took delivery of a 15,000 W tri-fuel generator, with a Honda GX690
motor, 690 cc, about 22 hp.
Couldn't get it to run off propane, cuz their regulator (that attaches
to
the tank itself) seems to be faulty. Haven't tried gasoline yet.

So I was able to kluge together a nat gas connection, some distance
away,
via a 50 ft coil of 3/8 id air hose.... yeah, I know, I know, chill, it
was
just a test.....

Generator ran fine, and I was a little surprised, given the narrow id
and
rel. long hose length. Under no-load conditions.

So here's the Q:
With typical natural gas pressure (I'm sposing 5-7" water), how much
actual load (hp) can be powered with 1/2" black pipe, of negligible
length?
Or, per actual sq in of pipe cross section. And then, how would that
power
capacity drop off with pipe length?

This will affect the size of the piping, and poss. the location of the
unit.
Tomorrow, I will wire up some temp. elec connections, and load as many
heaters etc as I can, to see if I can detect some fuel-bottleneck under
heavy load, thru 50 ft of 3/8" hose. If there is no perceptible
bottleneck,
then long-ish lengths of 1/2" pipe should be fine, 50 ft max.

Just wondering what I should expect.
--
EA

You have a picture or a link. I want to see what it looks like.
=================================================

http://www.generatorsales.com/order/...Generator.asp?...

additionally modified by them for gasoline, as well. No other options,
except for the propane regulator hose.

Looking at the specs, they specify a 3/8" connection, quite a bit smaller
than 3/4"
Altho, that diaphram pressure reg. you see attached to the base actually
has
a 3/4" thread, which the company bushes down to 3/8 -- but I think that
3/8"
is just for the propane, and you would use the un-bushed 3/4 for nat
gas....
Now ahm gettin it.... LOL

Note the small overall size of the unit...If you re-locate the pressure
reg,
the actual footprint of the unit is 30 L x 21 H x 16 D -- small indeed.
"Only" 245#, but goddamm, a heavy 245..... holy ****....
Much lower power Generacs et al are the size of a goddamm garden shed!!
And
not honda powered, either.

So it seems I will have to go with 3/4" pipe, which I thought I might
avoid.
So be it.
Let the next storm/outtage come!!
--
EA

Looks like a really nice unit to me. People swear by Honda engines for
generators, compressors, etc. I've never pulled one apart to see for
myself. I don't like Honda's car engines because if you overheat them
they have no material in the head and the head warps. Very easy to do
if an electric fan breaks or shorts. As soon as you notice it, it's
too late. I stick with GM / GMC trucks now. Obviously this isn't an
issue here. Just wondering what makes the Honda engines for this stuff
so good that people rave about them. Probably cast and machined very
well with a lot of attention to detail.
================================================== =====

That, and that the other engines that Generac et al uses are crappy, lot of
complaints.
Briggs&Stratton generators ought to have an OK engine, don't know about
Kohler and other brands.

What I think is happening is this:
When you buy a generator as a deducated standby back up generator for a
house, these companies are *banking* on the fact that in the next 10 years,
you will run the generator a whole 50 hours. *So that's what they build the
engine for. *And mebbe not even that.

Otoh, if you buy a *multi-purpose* unit like mine, they proly account for
the fact that you will be beating the **** out of the unit with lots of use,
and make it stronger. *Ergo, the Honder engine.

This Maine company doesn't manufacture stuff per se, they put these units
together from various suppliers, seems to be OK.
They also modify the Black Max 8,750 W unit for tri-fuel, that you find at
Sam's club (gasoline only) -- which *also has a Honda engine.

Generac et al has a lot of bells and whistles, but not intrinsic quality, as
per the above.
I just went for simple and lotsa power. *They're all goddamm noisy, until
you get to water cooled units, Onans, etc. *Much bigger $$ tho.
Even a lower rpm jobby air cooled jobby cost substantially more money. *Run
of the mill are all 3600 rpm.
--
EA

I agree with your assessment. Sure looks to me like you did your
homework and ended up with quality.