[Rhodes22-list] Gallons per hour

Stephen Staum snstaum at gmail.com
Sat Aug 25 12:11:06 EDT 2018


Rick,

I don’t understand. My 4 HP 2 stroke had a quart tank on the outboard. It
would run 2 hours @ 4.5 knots & 1 hour @ 5.5 knots. Since consumption has a
direct relationship to power output in any engine I don’t get how your 2
stroke consumes the same at all power settings. When flying I owned
aircraft with 108, 150 & 180 HP. They consumed 6, 8 & 10 gallons per hour
respectively  @ 70% cruise power.  Sorry Chris, I don’t know the formula
for computing consumption vs HP but the you can probably come up with one
from the above #’s.

Stephen Staum
s/v Carol Lee 2
Needham, MA

On Sat, Aug 25, 2018 at 11:45 AM Rick Lange <sloopblueheron at gmail.com>
wrote:

> Hi Chris,
>
> I don't think so, especially with 4 stroke engines where the variables are
> like that of car mileage.
>
> However, older 2 strokes are very predictable because they burn fuel at a
> constant rate.  My older 9hp burns a gallon each hour whether idling or
> pushing through 5 ft waves.
>
> Regards,
>
> Rick
>
>
> On Sat, Aug 25, 2018 at 9:47 AM Chris Cowie <ccowie at cowieassociates.com>
> wrote:
>
> > Trying to type on a phone.  My basic question, does hp divided by ten
> > provide and accurate estimate of gallons per hour.
> >
> >
> > Please note our new office address and phone number
> >
> > Christopher P. Cowie  [cid:image001.png at 01CA3AD3.5BD581F0]
> >  [cid:image002.png at 01CA3AD3.5BD581F0]
> >
> > 700 N Fairfax Street<x-apple-data-detectors://3/0>
> > Suite 304
> <https://maps.google.com/?q=BD581F0%5D%0A%3E%0A%3E+700+N+Fairfax+Street+%0A%3E+Suite+304+%0A%3E+Alexandria,+Virginia+22314&entry=gmail&source=g>
> <x-apple-data-detectors://3/0>
> > Alexandria, Virginia 22314
> <https://maps.google.com/?q=BD581F0%5D%0A%3E%0A%3E+700+N+Fairfax+Street+%0A%3E+Suite+304+%0A%3E+Alexandria,+Virginia+22314&entry=gmail&source=g>
> <x-apple-data-detectors://3/0>
> > 703.717.9103<tel:703.717.9103> ex.204 ● 202.270.1470<tel:202.270.1470>
> > mobile
> > [ccowie at cowieassociates.com<mailto:ccowie at cowieassociates.com>]
> >
> > [cid:image001.jpg at 01D24014.7A2D04E0]
> > Please consider the environment before printing this email.
> >
> >
> > On Aug 25, 2018, at 9:24 AM, Charles Nieman <blue66corvette at hotmail.com
> > <mailto:blue66corvette at hotmail.com>> wrote:
> >
> > Chris
> > This sentence makes no sense and how did you change to km at the end
> ?????
> >
> > Sent from my iPhone
> >
> > Charles
> >
> > On Aug 25, 2018, at 7:29 AM, Chris Cowie <ccowie at cowieassociates.com
> > <mailto:ccowie at cowieassociates.com>> wrote:
> >
> > A standard formula for an outboard is hp divided by ten or 8 hp divided
> by
> > equals .8 gallons per hour at 3/4 speed 5 kts.  Does this seem about
> right?
> > That would give a five gallon tank about 25 km plus.
> >
> >
> >
> > -----
> > Christopher P. Cowie
> >
> > 4400 MacArthur Blvd, NW
> > Suite 300
> > Washington, DC 20007
> > 202.342.2711 ex.204 ● 202.342.2691 fax ● 202.270.1470 mobile
> > [ccowie at cowieassociates.com<mailto:ccowie at cowieassociates.com>]
> >
> >
> >
> > --
> > Sent from: http://rhodes-22.1065344.n5.nabble.com/
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-- 
Stephen Staum
Pariser Industries, Inc.


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