[Rhodes22-list] Cooking
Bill Effros
bill@effros.com
Mon, 4 Nov 2002 14:40:37 -0500
Brad,
I'd love to know what you come up with. Your problem will be something
called Puekert's Number or Puekert's Equation. Look it up in Google.
According to the theory, your 180 amp battery simply can't deliver that much
energy in such a short period of time. It can deliver 1 amp for 180 hours,
but it can't deliver 180 amps for 1 hour.
I've never tried it, so I don't know what the threshold is, but I do know I
wouldn't want to be in a boat at night with hot coffee and no lights.
Try it and let me know.
Since I plan to get rid of my batteries I may take a look also. Will the
boat wiring withstand this kind of load?
Bill Effros
----- Original Message -----
From: "brad haslett" <flybrad@yahoo.com>
To: "The Rhodes 22 mail list" <rhodes22-list@rhodes22.org>
Sent: Monday, November 04, 2002 1:58 PM
Subject: Re: [Rhodes22-list] Cooking
Bill, I've seen several of those grills mounted on
R-22's and I like them. Anne has a charcoal only
grill on hers and I like that. According to my math,
the 12vDC coffee makers draw 12 amps. Assuming a
fully charged 180 amp battery and a 50% draw down
threshold you could make 30 pots of hot water
(assuming a 15 minute cycle) without recharging, more
if you wanted to take the battery closer to death.
(180/2)/(12*.25)= 30 pots. As was pointed out
earlier, you can't always count on the numbers working
as advertised but I'm going to test this theory in my
backyard before I set out.
Brad Haslett
--- Bill Effros <bill@effros.com> wrote:
> Brad,
>
> We have long skirted over the cooking issue, I'm
> glad you brought it up.
>
> Like you, I'm uncomfortable with the fire down
> below. Roger has faced all
> adjacent surfaces with stainless steel. Have you
> seen those pictures?
>
> The Magma BarBQue grill can be hung over the stern
> rail so that it and the
> fuel and anything on fire will simply fall
> semi-harmlessly into the water.
> The new propane magmas can be used as a grill, as an
> oven, or as a burner.
> I store my grill in the lazarette and can quickly
> set it up as needed.
> However it's a little awkward leaning out to cook,
> and many a good meal has
> fallen overboard.
>
> Roger pre-plans everything, packs food in dry ice,
> and prefers to cook it on
> shore. Since a Rhodes can be pulled right up to the
> beach this is a viable
> option.
>
> Cooking on board is dicey even in much larger boats.
> Scalding is always a
> danger, in addition to carbon monoxide, stuff
> catching on fire below deck,
> and fuel exploding.
>
> I doubt that cooking electrically is viable. The
> current draw is enormous
> and will suck the life out of as many batteries as
> you would ever consider
> carrying. The small generator cannot provide enough
> power for cook as you
> generate, and would have to stay on 24 hours a day
> to recharge the batteries
> for 15 minutes of use. You'll wind up carrying and
> playing with a whole lot
> of gasoline high on a potentially rocking boat (not
> supposed to refill while
> hot--just one more problem.)
>
> Bill Berner has done a lot of cruising, and I'd love
> to hear how he has
> handled this problem.
>
> I'd also love to hear how others handle both
> overnight cooking and cruising
> cooking.
>
> Bill Effros
>
>
> ----- Original Message -----
> From: "brad haslett" <flybrad@yahoo.com>
> To: "The Rhodes 22 mail list"
> <rhodes22-list@rhodes22.org>
> Sent: Monday, November 04, 2002 10:34 AM
> Subject: Re: [Rhodes22-list] Electrical KISS
>
>
> Bill, for some reason about half the photos from the
> R-22 server come up as text files on my computer.
> Haven't figured that one out yet. I looked for the
> Thermos solution on the Rhodes22.org site but didn't
> find it. We currently use a thermos for our day
> auto
> trips and it works fine and would suffice for
> daysailing. One of the nice things about being on
> the
> Tennessee River is the ability to travel and yet
> stay
> in protected waters. My older sons and I plan to
> make
> a trip to Knoxville in one direction and KY Lake in
> the other, each trip 3-5 days or more if we don't
> trailer home and possibly to Mobile as well. I've
> already done the wiring for shore power, and the DC
> stuff is a piece of cake (I worked as an aircraft
> mechanic decades ago and have an A&P license). The
> only issue for me is weight and storage space. We
> don't plan on having any six course meals on board
> just some soup, some coffee, and some hot butter for
> Rummy if we cross paths. I've owned three VW
> campers
> and an Airstream and I'm just not a big fan of fire
> in
> confined spaces especially when it rocks. Obviously
> I
> could buy bigger boat that had all the bells and
> whistles but I bet their owner list would be dull.
>
> Brad Haslett
> "CoraShen"
> --- Bill Effros <bill@effros.com> wrote:
> > Brad,
> >
> > Have you seen Roger's Hot Water Thermos solution
> to
> > the problem? Seems a
> > lot simpler to me. I've attached the pictures.
> >
> > Bill Effros
> >
> >
> > ----- Original Message -----
> > From: "brad haslett" <flybrad@yahoo.com>
> > To: <rhodes22-list@rhodes22.org>
> > Sent: Sunday, November 03, 2002 1:34 PM
> > Subject: [Rhodes22-list] Electrical KISS
> >
> >
> > Actually there is one high power draw application
> > that
> > I'm condidering but because I haven't done the
> math
> > yet I haven't thrown it out to the list for
> > discussion. My boat doesn't have a stove and
> there
> > really isn't a single one I've seen yet that fills
> > all
> > the squares for me. I'm not paranoid but I have
> > seen
> > all the pictures from the early days of the DC-10
> > where one of our Middle Eastern friends set the
> > airplane on fire cooking goat on the way to Mecca.
> > Starting an open flame in an R-22 galley doesn't
> > apeal
> > to me so here's the idea: I need hot water about
> > 2-3
> > times a day, once for coffee, maybe soup, and my
> > daughter's needs. A 12v DC coffee maker would do
> > the
> > trick without the need for a stove. If I keep the
> > use
> > down to 15 minutes at a time for less than 2-3
> times
> > a
> > day I think an extra battery would suffice. If
> > someone has already done this or wants to "run the
> > numbers" let me know (I never pass up free math
> > tutoring or electrical engineering). Brad.
> >
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