[Stoves] Pedal powered fan

[Kevin Chisholm]

Dear Martin

I think your "direct mechanical drive system" will also work.... many 
millions or treadle operated Singer sewing machines around the world prove 
that it is practical to generate small quantities of power from human 
effort.

A different kind of fan system will be required... It will require different 
bearings of a nature that it endure the "side loading" caused by the belt. 
Additionally, if the stove system is relatively small, and if the fan is 
mounted on the stove, there will need to be a structure of some sort to 
ensure that belt tension does not more the stove toward the "power machine", 
or there must be two separate systems, with a flexible hose delivering the 
air to the stove.

Concerning the $5 number... I presume this is the equivalent to total 
expenditures equal to $5 of cost if the stove system was made in the USA. I 
do not know what costs are really permissible when coming up with a total 
cost. A factory made product has the following costs:
*Materials
*Labor
*Factory overhead, expense,  and profit
*Packaging
*Instructions
*Shipping
*Training and support.

If the stove is made locally near the point of use, for sale directly to the 
End User, the following costs are appropriate:
*Materials
*Labor
*Factory overhead, expense, and profit.
*Customer Support

If the stove can be made locally by the End User, then the cost could be as 
low as:
*Somebody else providing plans, sketches, or instructions on how to build 
the stove.
*Cost of materials that must be purchased.

It would be very helpful if someone could elaborate on what costs must be 
included in the "$5 stove." It is indeed a challenge to make a stove at a 
foreign factory and get it to the End User for $5 or less.

Best wishes,

Kevin




----- Original Message ----- 
From: "Boll, Martin Dr." <boll.bn at t-online.de>
To: <stoves at listserv.repp.org>
Cc: "'Frans Peeters'" <peetersfrans at pandora.be>
Sent: Sunday, December 17, 2006 9:59 AM
Subject: Re: [Stoves] Pedal powered fan


> Dear Kevin,
>
>
>
> First of all I think it is possible. But to make a 5$ fan plus
> energy-generator plus stove, we must de-lard as well the
> bicycle-pedal-system as well as the fan and the stove too. The fan must be
> locally made and low-tech; mechanically driven by a belt/string.
> -Transmission by a big and a small circle-disk with V- or U-profile on the
> periphery, to guide and hold the transmission-cord on both the disks.-
>
> The big disk can be made of wood, metal, armoured brick or concrete ( 
> Think
> of making the profile notch smooth, for not wearing out the belt before
> time), with quadratic axle-profile, where you easily can fix a lever and
> pedal on each side.
>
> -The big disk/wheel could be made as well as an old-fashioned water-wheel 
> by
> a pair of crossing wood-bars round the quadratic axle; my original thought
> for a solution.
>
> I think it is possible to do that -if no other possibility- with wood too.
> Naturally the dimensions must be wood-adequate, and not as the metal
> original.
>
> -The idea for a brick-wheel came when I saw your 5$ price to manage with.
> That would be another task for Crispins Brick-maker.
>
> When a transmission from pedal-disk 1 revolution to 10 revolutions of the
> fan will be sufficient, I think it is possible.
>
> For an according radial-fan I have a simple construction solution in mind
> and I shall try to give a sketch later on.
>
>
>
> Regards
>
>
>
> Martin
>
>
>
>
>
>
>
> Dear Martin
>
>
> Bicycle generated power is certainly practical, and it will work.
> Additionally, it is probably the most available, understandable, and
> maintainable way to generate adequate quantities of power to run a stove.
>
> We hear frequent reference to "The $5 Stove." Do you think it would be
> possible to build a stove with a fan, and to provide a bicycle type
> generator system for operating the fan, for $5 or less?
>
> Best wishes,
>
> Kevin
> ----- Original Message ----- 
> From: "Boll, Martin Dr." <
> <http://listserv.repp.org/mailman/listinfo/stoves_listserv.repp.org> 
> boll.bn
> at t-online.de>
> To: < <http://listserv.repp.org/mailman/listinfo/stoves_listserv.repp.org>
> stoves at listserv.repp.org>
> Cc: "'Frans Peeters'" <
> <http://listserv.repp.org/mailman/listinfo/stoves_listserv.repp.org>
> peetersfrans at pandora.be>
> Sent: Saturday, December 16, 2006 4:30 PM
> Subject: [Stoves] Pedal powered fan
>
>
>
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