A
Adam Rush
Guest
I found a local store which has a carbide lamp for sale for next to
nothing. How does the output of one of these compare to a
dynamo-driven lamp?
nothing. How does the output of one of these compare to a
dynamo-driven lamp?
Z
Zog The Undeniable
Guest
Adam Rush wrote:
> I found a local store which has a carbide lamp for sale for next to
> nothing. How does the output of one of these compare to a
> dynamo-driven lamp?
>
Not having access to a ready source of calcium carbide, I don't know,
but looking at this:
http://www.wmmi.org/topics/carbide.htm
maybe about half as bright.
> I found a local store which has a carbide lamp for sale for next to
> nothing. How does the output of one of these compare to a
> dynamo-driven lamp?
>
Not having access to a ready source of calcium carbide, I don't know,
but looking at this:
http://www.wmmi.org/topics/carbide.htm
maybe about half as bright.
P
peter
Guest
I used a carbide lamp on my bike years ago. The beam was not as
focussed as a good dynamo system (I think the larger size of the flame
makes it hard to get a good beam). The light output was generally a bit
on the low side except on bumpy roads. Then the shaking would drop
more water on the carbide and I'd have a real blowtorch for awhile.
focussed as a good dynamo system (I think the larger size of the flame
makes it hard to get a good beam). The light output was generally a bit
on the low side except on bumpy roads. Then the shaking would drop
more water on the carbide and I'd have a real blowtorch for awhile.
L
Leo Lichtman
Guest
"Adam Rush" wrote: I found a local store which has a carbide lamp for sale
for next to nothing. How does the output of one of these compare to a
dynamo-driven lamp?
^^^^^^^^^^^^^
When I was a kid I attached a miner's lamp (carbide) to a block of wood, and
put it in my flashlight holder (remember those?) on my handlebars. It
worked okay, but the problem was turning it off. You can close off the
water drip, but it continues to generate acetylene for a while. And if you
blow it out, it smells terrible.
for next to nothing. How does the output of one of these compare to a
dynamo-driven lamp?
^^^^^^^^^^^^^
When I was a kid I attached a miner's lamp (carbide) to a block of wood, and
put it in my flashlight holder (remember those?) on my handlebars. It
worked okay, but the problem was turning it off. You can close off the
water drip, but it continues to generate acetylene for a while. And if you
blow it out, it smells terrible.
A
Adam Rush
Guest
A
Andreas Oehler
Guest
18 Feb 2006 14:36:46 -0800, Adam Rush:
>I'm having trouble finding any dynamo lamp's candlepower. Anybody have
>some figures?
With "candlepower" you mean the unit "Candela"?
In germany legal requirements are given in lux measured on a wall 10 meter
away from the lamp. Modern headlamps with 2.4 Watt halogen bulbs reach 10
to 20 lux in 10m at 6.0 Volt. This means 1000 to 2000 Candela. When using
a 6V-3W bulb in such a headlamp and riding 20-30 km/h with a modern
gearless hub generator 30-35 lux (equalling 3000-3500 Candela) will be
reached in the brightest spot. Hub generators are able to power two 3W
bulbs at speeds above 20 km/h.
Halogen battery lamps like Cateye HL-500 and better LED-lamps like EL-500G
reach around 1000 Candela. Cheaper/older LED-lamps like Cateye EL-300G
reach only 400 Candela.
Andreas
>I'm having trouble finding any dynamo lamp's candlepower. Anybody have
>some figures?
With "candlepower" you mean the unit "Candela"?
In germany legal requirements are given in lux measured on a wall 10 meter
away from the lamp. Modern headlamps with 2.4 Watt halogen bulbs reach 10
to 20 lux in 10m at 6.0 Volt. This means 1000 to 2000 Candela. When using
a 6V-3W bulb in such a headlamp and riding 20-30 km/h with a modern
gearless hub generator 30-35 lux (equalling 3000-3500 Candela) will be
reached in the brightest spot. Hub generators are able to power two 3W
bulbs at speeds above 20 km/h.
Halogen battery lamps like Cateye HL-500 and better LED-lamps like EL-500G
reach around 1000 Candela. Cheaper/older LED-lamps like Cateye EL-300G
reach only 400 Candela.
Andreas
A
A Muzi
Guest
Adam Rush wrote:
> I found a local store which has a carbide lamp for sale for next to
> nothing. How does the output of one of these compare to a
> dynamo-driven lamp?
For 'next to nothing' you can compare them directly. (!)
The typical square body lamp with a drip valve on top gives
a small flame with (usually) an adjustable reflector. The
absolute minimum light, something akin to a 2W non-halogen
battery lamp. Awfully cute though, and attracts tinkerers.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
> I found a local store which has a carbide lamp for sale for next to
> nothing. How does the output of one of these compare to a
> dynamo-driven lamp?
For 'next to nothing' you can compare them directly. (!)
The typical square body lamp with a drip valve on top gives
a small flame with (usually) an adjustable reflector. The
absolute minimum light, something akin to a 2W non-halogen
battery lamp. Awfully cute though, and attracts tinkerers.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
A
Adam Rush
Guest
> For 'next to nothing' you can compare them directly. (!)
The carbide, however, costs $30 a bucket.
The carbide, however, costs $30 a bucket.
A
A Muzi
Guest
Adam Rush wrote:
>>For 'next to nothing' you can compare them directly. (!)
>
>
> The carbide, however, costs $30 a bucket.
>
Hobby stores sell small 'blocks' cheaply.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
>>For 'next to nothing' you can compare them directly. (!)
>
>
> The carbide, however, costs $30 a bucket.
>
Hobby stores sell small 'blocks' cheaply.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
L
Leo Lichtman
Guest
"A Muzi" wrote: Hobby stores sell small 'blocks' cheaply.
^^^^^^^^^^^^^^
What is it used for by hobbyists?
^^^^^^^^^^^^^^
What is it used for by hobbyists?
A
A Muzi
Guest
> "A Muzi" wrote: Hobby stores sell small 'blocks' cheaply.
Leo Lichtman wrote:
> What is it used for by hobbyists?
A small scale steam engine and carbide cannons
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
Leo Lichtman wrote:
> What is it used for by hobbyists?
A small scale steam engine and carbide cannons
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
D
dan_s
Guest
Adam Rush wrote:
>>For 'next to nothing' you can compare them directly. (!)
>
>
> The carbide, however, costs $30 a bucket.
>
you can get less here:
http://www.calcium-carbide.com/
they sell by the pound and do online orders
>>For 'next to nothing' you can compare them directly. (!)
>
>
> The carbide, however, costs $30 a bucket.
>
you can get less here:
http://www.calcium-carbide.com/
they sell by the pound and do online orders
A
Adam Rush
Guest
J
Andrew Muzi writes:
>> Hobby stores sell small 'blocks' cheaply.
>> What is it used for by hobbyists?
> A small scale steam engine and carbide cannons
Carbide and water makes acetylene gas. I watched welders use that as
a source for welding in times gone by. Maybe a welding supply store
still stocks the stuff... in large quantities.
Jobst Brandt
>> Hobby stores sell small 'blocks' cheaply.
>> What is it used for by hobbyists?
> A small scale steam engine and carbide cannons
Carbide and water makes acetylene gas. I watched welders use that as
a source for welding in times gone by. Maybe a welding supply store
still stocks the stuff... in large quantities.
Jobst Brandt
L
Leo Lichtman
Guest
I went to the website, www.unioncarbide.com, whose name came from this
product. They are now a wholly owned subsidiary of Dow Chemical, and there
is no mention of calcium carbide on their website.
product. They are now a wholly owned subsidiary of Dow Chemical, and there
is no mention of calcium carbide on their website.
M
M-gineering
Guest
[email protected] wrote:
> Andrew Muzi writes:
>
>
>>>Hobby stores sell small 'blocks' cheaply.
>
>
>>>What is it used for by hobbyists?
>
>
>>A small scale steam engine and carbide cannons
>
>
> Carbide and water makes acetylene gas. I watched welders use that as
> a source for welding in times gone by. Maybe a welding supply store
> still stocks the stuff... in large quantities.
>
> Jobst Brandt
You should travel more
. A Rumanian welding store should have what you
need.
In more safety conscious surroundings these things are frowned upon, as
a clogged-up safetyvalve has funny consequences.
--
---
Marten Gerritsen
INFOapestaartjeM-GINEERINGpuntNL
www.m-gineering.nl
> Andrew Muzi writes:
>
>
>>>Hobby stores sell small 'blocks' cheaply.
>
>
>>>What is it used for by hobbyists?
>
>
>>A small scale steam engine and carbide cannons
>
>
> Carbide and water makes acetylene gas. I watched welders use that as
> a source for welding in times gone by. Maybe a welding supply store
> still stocks the stuff... in large quantities.
>
> Jobst Brandt
You should travel more
. A Rumanian welding store should have what youneed.
In more safety conscious surroundings these things are frowned upon, as
a clogged-up safetyvalve has funny consequences.
--
---
Marten Gerritsen
INFOapestaartjeM-GINEERINGpuntNL
www.m-gineering.nl
A
Adam Rush
Guest
A
A Muzi
Guest
>> "A Muzi" wrote:
Hobby stores sell small 'blocks' cheaply.
> Leo Lichtman wrote:
>> What is it used for by hobbyists?
A Muzi wrote:
> A small scale steam engine and carbide cannons
Sorry for replying to my own reply but a couple of phone
calls show hobby stores no longer know what 'cabide' is.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
Hobby stores sell small 'blocks' cheaply.
> Leo Lichtman wrote:
>> What is it used for by hobbyists?
A Muzi wrote:
> A small scale steam engine and carbide cannons
Sorry for replying to my own reply but a couple of phone
calls show hobby stores no longer know what 'cabide' is.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
B
bob prohaska's usenet account
Guest
Adam Rush <[email protected]> wrote:
> I found a local store which has a carbide lamp for sale for next to
> nothing. How does the output of one of these compare to a
> dynamo-driven lamp?
All the carbide lamps I've ever seen used an open flame centered in a
reflector; how would one use it in the breeze of a moving bicycle?
Seems to me it would just blow out of focus, or out entirely.
FWIW I have some vague memories of playing with acetylene flames
and they are _very_ bright compared to any other flame. But, they're
no match for a tungsten filament when you need to focus the light.
I'd buy the lamp for its technical interest, but not as a practical
bike light.
bob prohaska
> I found a local store which has a carbide lamp for sale for next to
> nothing. How does the output of one of these compare to a
> dynamo-driven lamp?
All the carbide lamps I've ever seen used an open flame centered in a
reflector; how would one use it in the breeze of a moving bicycle?
Seems to me it would just blow out of focus, or out entirely.
FWIW I have some vague memories of playing with acetylene flames
and they are _very_ bright compared to any other flame. But, they're
no match for a tungsten filament when you need to focus the light.
I'd buy the lamp for its technical interest, but not as a practical
bike light.
bob prohaska
D
David Damerell
Guest
Quoting bob prohaska's usenet account <[email protected]>:
>Adam Rush <[email protected]> wrote:
>>I found a local store which has a carbide lamp for sale for next to
>>nothing. How does the output of one of these compare to a
>>dynamo-driven lamp?
>All the carbide lamps I've ever seen used an open flame centered in a
>reflector; how would one use it in the breeze of a moving bicycle?
All bike lights were carbide once. The difficulty is not that - it's
straightforward to build a light which has glass ahead of the flame and
air intakes further back - but that lights which go boom if mistreated are
not really ideal.
--
David Damerell <[email protected]> flcl?
Today is Gloucesterday, February.
>Adam Rush <[email protected]> wrote:
>>I found a local store which has a carbide lamp for sale for next to
>>nothing. How does the output of one of these compare to a
>>dynamo-driven lamp?
>All the carbide lamps I've ever seen used an open flame centered in a
>reflector; how would one use it in the breeze of a moving bicycle?
All bike lights were carbide once. The difficulty is not that - it's
straightforward to build a light which has glass ahead of the flame and
air intakes further back - but that lights which go boom if mistreated are
not really ideal.
--
David Damerell <[email protected]> flcl?
Today is Gloucesterday, February.