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What is the capacitance value of a condenser?

N

Naveed

Jan 1, 1970
0
Hi

Can anyone tell me the capacitance value of a condenser used in a car
ignition circuit (across the ignition coil)?

Thanks

Naveed
 
R

Rick

Jan 1, 1970
0
Naveed said:
Hi

Can anyone tell me the capacitance value of a condenser used in a car
ignition circuit (across the ignition coil)?

Thanks

Naveed


0.22 microfarads comes to mind....
 
J

JSF

Jan 1, 1970
0
Have not seen that in a long time. What country are you in.
 
N

Naveed

Jan 1, 1970
0
JSF said:
Have not seen that in a long time. What country are you in.

I'm in England.

I am trying to get my ignition circuit to produce large sparks and thought
that a condenser is basically a capacitor an I have lots of those.

naveed
 
B

Boris Mohar

Jan 1, 1970
0
I'm in England.

I am trying to get my ignition circuit to produce large sparks and thought
that a condenser is basically a capacitor an I have lots of those.

naveed

So you think that bigger capacitor will give you a bigger spark? Do they
use bigger nails for bigger houses?

Look up CD ignition systems if you want bigger sparks.




Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca

void _-void-_ in the obvious place
 
J

Joerg

Jan 1, 1970
0
Hello Boris,
So you think that bigger capacitor will give you a bigger spark? Do they
use bigger nails for bigger houses?

They use bricks, no nails. Wish it was the same in the US.

Regards, Joerg (currently fixing some framing and hating it...)
 
K

kell

Jan 1, 1970
0
Naveed said:
I'm in England.

I am trying to get my ignition circuit to produce large sparks and thought
that a condenser is basically a capacitor an I have lots of those.

naveed

I doubt changing the capacitance will boost your spark. The people
designing automobiles had generations to come up with the most
efficient way to do things, within the limitations of the technology at
the time.
You can get a better coil, or go to electronic ignition. The highest
voltage sparks come from capacitive discharge, but most commercially
produced CD ignitions produce a rapid series of several very short
duration sparks. Seems to work.
If you are sticking with inductive ignition, I think you have to go to
a different coil to make a difference in the spark voltage or energy.
And keep those points clean.
 
M

Michael A. Terrell

Jan 1, 1970
0
Joerg said:
Hello Boris,


They use bricks, no nails. Wish it was the same in the US.

Regards, Joerg (currently fixing some framing and hating it...)


You wouldn't want bricks in hurricane country. :(


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
J

John G

Jan 1, 1970
0
JSF said:
Have not seen that in a long time. What country are you in.

Dont think Kettering realy cared what country you were in.

The OP should just buy an ignition capacitor in the propoer frame to
suit the distributor in his car.
The value was optimised long before you/ we were born.
 
J

Joerg

Jan 1, 1970
0
Hello Michael,
You wouldn't want bricks in hurricane country. :(
If built right those building can be a lot stronger than any wood frame
scheme. Wood frame has the problem that even if you anchor your roof
trusses as good as you can it might lift the whole house off the foundation.

Whenever we had a tornado or something in Europe people sat it out in
the local pub and the damage usually was limited to some roof tiles
having flown off. Since they are heavy and just hooked into the field
the repair is pretty easy. Done it many times.

The best construction is with hollow bricks. You drop rebar through the
cavities and then fill that up with good mortar. The only downside is
that such a building is next to impossible to tear down if that is ever
desired. You can fire a big grenade at it and all you have is a few chips.

Regards, Joerg
 
M

Michael A. Terrell

Jan 1, 1970
0
Joerg said:
Hello Michael,

If built right those building can be a lot stronger than any wood frame
scheme. Wood frame has the problem that even if you anchor your roof
trusses as good as you can it might lift the whole house off the foundation.

Whenever we had a tornado or something in Europe people sat it out in
the local pub and the damage usually was limited to some roof tiles
having flown off. Since they are heavy and just hooked into the field
the repair is pretty easy. Done it many times.

The best construction is with hollow bricks. You drop rebar through the
cavities and then fill that up with good mortar. The only downside is
that such a building is next to impossible to tear down if that is ever
desired. You can fire a big grenade at it and all you have is a few chips.

Regards, Joerg


The latest research indicates that a concrete block wall with a layer
of 3/4" plywood is the safest design, for now. The local TV stations
showed a rebar reinforced concrete wall that had a 8' 2" * 4" fired at
it, and it went right through it because the force is concentrated in a
small area. The same test on a wall with the plywood added caused the
2" * 4" to explode on impact. Hurricanes require different designs than
for tornados. One of the universities has a research project where they
are trying to develop a more hurricane resistant design, without putting
everything underground.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
J

Joerg

Jan 1, 1970
0
Hello Michael,
The latest research indicates that a concrete block wall with a layer
of 3/4" plywood is the safest design, for now. The local TV stations
showed a rebar reinforced concrete wall that had a 8' 2" * 4" fired at
it, and it went right through it because the force is concentrated in a
small area. ...


I highly doubt that it was built right. They have built bunkers that way
and even a grenade fired at it is usually brushed off. Don't in when in
the army. It was impressive.

Sure, adding a plywood cushion can help but it may not be necessary.
Plus the stuff rots.

When it comes to building I trust the Romans more than anything, and
modern "research" can be influenced by the trade and what they prefer.
The Romans built stuff strong since they were constantly under attack
(because they attacked others all the time). A lot of their buildings
are still in good shape, more than 1500 years after the builder's
warranty ran out.

Regards, Joerg
 
M

Michael A. Terrell

Jan 1, 1970
0
Joerg said:
Hello Michael,


I highly doubt that it was built right. They have built bunkers that way
and even a grenade fired at it is usually brushed off. Don't in when in
the army. It was impressive.


The blast from a grenade is not a blunt force with mass at over 100
miles an hour. You have to live through a hurricane or two to see what
its really like. Sure, you can use poured concrete to build a home,
then the average family can't afford to buy the home. Like all other
engineering, it involves tradeoffs. There is a class action suit against
a number of home builders for the damage caused to fairly new homes that
leaked like a sieve from the hard driven horizontal rain that poured
through stucco and block homes.


Sure, adding a plywood cushion can help but it may not be necessary.
Plus the stuff rots.


Plywood was the traditional material used under the siding, till the
cheaper tar coated fiber crap came along. Termites are a bigger problem
in Florida than the wood rotting. Some of them can burrow through the
softer spots in concrete blocks, build a tube up the wall to the roof
and eat the rafters when there is no wood within 8 feet of the ground
outside.
When it comes to building I trust the Romans more than anything, and
modern "research" can be influenced by the trade and what they prefer.
The Romans built stuff strong since they were constantly under attack
(because they attacked others all the time). A lot of their buildings
are still in good shape, more than 1500 years after the builder's
warranty ran out.


Sure, but the huge blocks of solid stone used in Roman construction
were never exposed to a hurricane, were they?
Regards, Joerg


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
J

Joseph2k

Jan 1, 1970
0
Joerg said:
Hello Michael,

If built right those building can be a lot stronger than any wood frame
scheme. Wood frame has the problem that even if you anchor your roof
trusses as good as you can it might lift the whole house off the
foundation.

Whenever we had a tornado or something in Europe people sat it out in
the local pub and the damage usually was limited to some roof tiles
having flown off. Since they are heavy and just hooked into the field
the repair is pretty easy. Done it many times.

The best construction is with hollow bricks. You drop rebar through the
cavities and then fill that up with good mortar. The only downside is
that such a building is next to impossible to tear down if that is ever
desired. You can fire a big grenade at it and all you have is a few chips.

That depends on how much of the outer surface is windows.
Regards, Joerg
Design is a matter of tradeoffs, anyone interested in doing so can design
for a building in San Francisco to last for 400 years, or to be obsolete in
20 years anywhere on earth. Neither design is guaranteed to come to pass.
 
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