[Stoves] Camping and backpacking stoves

David G. LeVine dlevine at speakeasy.net
Tue Jul 17 17:47:45 CDT 2012


On 07/17/2012 09:58 AM, Steve Taylor wrote:
>
>
> On 17 July 2012 14:36, David G. LeVine <dlevine at speakeasy.net 
> <mailto:dlevine at speakeasy.net>> wrote:
>
>
>     Is there a good reason that a TLUD can not be hexagonal or
>     octagonal?  Hexagonal packs better, but either can be made to fold
>     almost flat (assuming normal hinging.)  Having multiple staggered
>     hinges allows very close to flat with only a small amount of
>     non-flat overhang.
>
>
> Aren't they round to ensure uniform gas flow conditions for both 
> primary AND secondary air ?

Yes, but there is round and there is round.  No TLUD stove I have seen 
is round within 0.0001".  The approximation of round with a series of 
straight line segments is common (take a good look at CAD/CAE software 
like Autocad and Corel DRAW!) and a small enough deviation from round 
does not affect the air flow significantly.

Let's assume a hexagonal shape.  Can airflow be close enough to uniform 
so there is little loss?  I would believe it can.  If not, where will 
the air flow be nonuniform enough to have a significant effect?

I would be willing to bet that a triangular TLUD stove could be built 
and it would be within 20% of the efficiency of a similarly designed 
round one.

Dave  8{)
-- 
/"The first method for estimating the intelligence of a ruler is to look 
at the men he has around him."/
Niccolo Machiavelli

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