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<P style="MARGIN: 0in 0in 10pt" class=MsoNormal><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt">That
is what I was thinking, I had already started typing a note.<SPAN
style="mso-spacerun: yes"> </SPAN>I think the hazard of a bump and spill
or splash is more likely than a tip over. A bump Like someone falling against
the stove could dislodge the pot but not tip over the stove. The pot holders,
the shape of the cook top and the foot print could affect the bump/spill/splash
hazard.<o:p></o:p></SPAN></B></P>
<P style="MARGIN: 0in 0in 10pt" class=MsoNormal><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt">I
am thinking that the height with a pot of 2 to 2.5 <SPAN
style="mso-spacerun: yes"> </SPAN>times the width of the base would be safe
but 3 or 4 times would be getting dangerous. <o:p></o:p></SPAN></B></P>
<P style="MARGIN: 0in 0in 10pt" class=MsoNormal><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt">This
is for household size stoves, with larger stoves, you are less likely to have a
force large enough to affect the stove.<o:p></o:p></SPAN></B></P></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=crispinpigott@gmail.com href="mailto:crispinpigott@gmail.com">Crispin
Pemberton-Pigott</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=stoves@lists.bioenergylists.org
href="mailto:stoves@lists.bioenergylists.org">'Discussion of biomass cooking
stoves'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, September 23, 2013 9:34
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] Stoves Digest, Vol
37, Issue 24</DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">Dear
Nate<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">I
am experimenting with a different form of stability as the chances of a pot
tipping over are not as great as that of a pot falling off. If the support
triangle or square of a stove is relatively then putting on a large diameter
pot is dangerous because it easily falls over spilling hot water on everything
and everyone.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">We
are looking at a rice steaming soblok as the most dangerous local cooking
container. It has a hollow space at the bottom where water is boiled
continuously, a platform for holding the rice which is more dense than water,
and a tall pot with little space above. When tilted the centre of gravity
moves more than it would if there was no steamer
section.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">When
that same pot is used for boiling water it is relative tall for its diameter.
When tilted the water shifts to the outside moving the CG more than the tilt
of a solid object.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">I
was thinking of a spec whereby the pot supports should be adequate to cause
the water to spill out of an 80% full pot before falling over. It is a test
that can be done mathematically as well as practically.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">Interested?<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">Regards<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">Crispin
in Jakarta<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<DIV>
<DIV
style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0mm; PADDING-LEFT: 0mm; PADDING-RIGHT: 0mm; BORDER-TOP: #e1e1e1 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<P class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 11pt"
lang=EN-US>From:</SPAN></B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 11pt" lang=EN-US>
Stoves [mailto:stoves-bounces@lists.bioenergylists.org] <B>On Behalf Of
</B>Nathan Johnson<BR><B>Sent:</B> Monday, September 23, 2013 11:28
PM<BR><B>To:</B> <stoves@lists.bioenergylists.org><BR><B>Subject:</B>
Re: [Stoves] Stoves Digest, Vol 37, Issue 24<o:p></o:p></SPAN></P></DIV></DIV>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Hi Lanny, <o:p></o:p></P>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal>There are two methods and metrics commonly used to measure
the susceptibility of a stove from tipping over<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal>1) method -- with a stove standing vertically, tilt the
stove to one side until it falls over; metric -- the angle that the stove can
be tilted away from vertical before it tips over on its own (typically used
for portable stoves)<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal>2) method -- apply a specified horizontal force to the
stove; metric -- if the stove tilts, moves, deforms, or falls over when the
force is applied (typically used for larger stationary
stoves)<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal>Protocols should not specify the required size of the base
to prevent tipping. That decision is left to the designer based on his/her
findings from the safety tests. <o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal>Most protocols do not require pots present on the stove.
Yet, as you note, a pot can affect the stove's risk of tipping. No doubt all
aspects of the cooking system--stove, user, pots/utensils, kitchen--affect
cooking safety. Many people in the stove community tend to consider the larger
contexts that influence the efficacy of technical designs. I have a similar
viewpoint, and chose to include the stove when developing a new set of safety
guidelines tailored to biomass cookstoves. You can find my work on stove
safety here <A
href="http://community.cleancookstoves.org/user_content/files/003/052/3052100/a8d66ebfa9745553fb1d971160a282d4-bssp1.0.pdf">http://community.cleancookstoves.org/user_content/files/003/052/3052100/a8d66ebfa9745553fb1d971160a282d4-bssp1.0.pdf</A>
The text is copied from my Master's Thesis. Let me know if you want a copy of
the full text. <o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal>Best regards, <o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal>Nate<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P>
<DIV>
<DIV>
<DIV>
<DIV>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Helvetica','sans-serif'; COLOR: black; FONT-SIZE: 13.5pt">--<BR>Nathan
Johnson<BR>Assistant Professor<BR>Department of Engineering &
Computing Systems<BR>Arizona State
University<BR><BR></SPAN><o:p></o:p></P></DIV></DIV></DIV></DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV></DIV>
<P>
<HR>
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