[PUP] Fuel consumption Was: The right boat

[Arild Jensen]

> -----Original Message-----
> From: Scott Bulger

> S:  It's not the cost of piping and valves, but the complexity of
> manifolds and in/out combinations that must be balanced against the value.
> I was on a N46 with 5 tanks and the skipper spent a lot of time
considering
> where fuel was coming from and going to.  I concern myself with only Port
or
> Starboard, list one way, draw from the heavy side till trim.


REPLY
Well I was including manifolds as part of the necessary piping system.
With four tanks on board I really didn't want four individual filler pipes
scattered around the deck.

Given today's environmental concerns and the punitive fines imposed by USCG
if a spill occurs, I decided to go with an SPF system. SPF = single point
Fuelling which is what aircraft uses. You only have one filler port  which
is located in a spill pocket complete with anti splash filtering. This
naturally involves some substantial pipe manifolds valves and a transfer
pump with a capacity equal to the marina gas pump.



> A:  As a minimum a third tank with at least 48 hours fuel burn capacity is
> required. This now becomes the CLEAN FUEL reservoir and  is never
> compromised by filling directly from shore. It only gets filled from the
> fuel polishing system.
> S:  Does this mean your two days away from the source of bad fuel?  Maybe
> I'm crazy, but I see myself finding out ASAP and going back to the source
> and offloading the fuel back to them, then asking them to make it
> right.


REPLY
Well I was thinking more along the line of biological contamination from
bugs breeding in a tank that sits unused for a long period of time.



> S:  I subscribe to David Pascoe's' believe that condensation in
> fuel tanks is an urban legend:
> http://www.yachtsurvey.com/myth_of_condensation_in_fuel_tanks.htm


REPLY
David Pascoe is primarily a Florida surveyor.  I wonder if he would reach
the same conclusion  if he did a lot of work up in the PNW  where hot fuel
from a long run cools down to around 40F on a typical winter day.


regards
Arild