r1, rn, r2 OR R1, Rn, R2?

[Tidy Max]

I bought the box that split it up into smaller books so there was 8 in total. Very astute of you to notice though. Anyway The Hobbit was a far better book than any of the LOTR i made it through. Currently trying to plough through Game of Thrones!

Cheers Murdoch, it was tough, but we made it!

 

[Octopus]

I bought the box that split it up into smaller books so there was 8 in total. Very astute of you to notice though. Anyway The Hobbit was a far better book than any of the LOTR i made it through. Currently trying to plough through Game of Thrones!

Cheers Murdoch, it was tough, but we made it!

under each post is a "thanks" button and a "like" button. - use them

 

[Geoffsd]

Lord of the radials is easier. :seeya:

 

[Heisenberg]

under each post is a "thanks" button and a "like" button. - use them

I'd give up trying to catch Tel if I was you :rofl:

 

[HandySparks]

(r1)/2 = R1
(r2)/2 = R2

Page 94 (r1+r2)/4 = (R1+R2)

Draw the circuit.

In case the above confuses anyone, I just thought I'd point out that the correct formulae are:
(r1)/4 = R1
and
(r2)/4 = R2

So, (r1 + r2)/4 = (R1 + R2)

 

[Silly Sausage]

Something weird just happened, heard a slight bang, computer and hifi went dead then restarted, lights still on, alarms going off outside...

 

[Geoffsd]

......

 

[Tidy Max]

Meteor!!!!

 

[Silly Sausage]

In case the above confuses anyone, I just thought I'd point out that the correct formulae are:
(r1)/4 = R1
and
(r2)/4 = R2

So, (r1 + r2)/4 = (R1 + R2)

Only if the Line & CPC are same csa!

You wouldn't notice in reality!

 

[Geoffsd]

......

 

[HandySparks]

In case Max is getting confused again - My posts are correct.

Your original formulae:
"(r1)/2 = R1
(r2)/2 = R2
Page 94 (r1+r2)/4 = (R1+R2)"

Just put some trial values in.
Suppose r1=1ohm and r2=1ohm (same size line and CPC conductors).

Then 1/2 = R1
and 1/2 = R2

(1+1)/4 = (1/2 + 1/2)
which, clearly, is incorrect.

 

[GB.Kayak]

(r1)/2 = R1
(r2)/2 = R2

Page 94 (r1+r2)/4 = (R1+R2)

Draw the circuit.

Geoff,

If R1 = (r1)/2 and R2 = (r2)/2 then:

R1 + R2 = (r1 + r2)/2

Clearly not correct.

Therefore, R1 = (r1)/4 and R2 = (r2)/4 in order that:

R1 + R2 = (r1 + r2)/4

Regards

GB

 

[HandySparks]

Only if the Line & CPC are same csa!

It's true, even if they're different.

 

[Geoffsd]

I do beg your pardon. Getting muddled with half a half.

You are correct. I shall amend my posts.

Sorry.

 

[Stroppy]

OSG page 93.

Page 81 in the red 17th version.