P plate training ...not

So how much extra fuel would I be using by having my car air-conditioner set
at 23 degrees rather than 24 degrees ?

Boxer

 

That all depends on how much current the flux capacitor has stored .

 

You are wasting a lot of extra fuel. You should be on your bike!

Theo

 

The aircon on my bike is currently set at 33°C.. so if I am in my car
with the aircon set at 23° I'd be saving a lot of fuel, right?

Nev..
'04 CBR1100XX

 

An engine is designed to work efficiently with a certain amount of load so
perhaps driving with the air conditioner on is more efficient (and with the
windows up less drag) than with it switched off.

Boxer

 

Oi, don't you go dragging me into that camp. I repeatedly said more
lights need more energy. All I claimed was that adding electrical demand
could not by itself increase mechanical load; something has to decide to
supply more mechanical effort to satisfy the electrical demand, or to
leave the demand unsatisfied. That something (in the simple example I
used) was the person pedalling the push-bike. Everything I've read since
confirms your viewpoint, not mine, but since I still don't understand it
I'm holding off admitting error.
--
Cheers

Andrew

(Checks temperature reading of Hell: still a toasty 400 degrees C)

 

Oh I have no doubt at all we probably do have things in common (other than motorcycling). I just have no idea what they are,
considering I know next to nothing about you other than what I read here and from the 2 or 3 times we have met in person. Everyone
can find common ground if they make the effort. What on Earth do I have to be uncomfortable about?

And why the assumption that what I have typed is intentionally underhanded?

My comment "Some here may argue that you're keeping it for when you know what you're talking about"...... Why could you not take it
on face value? Clems response to it shows that my comment isn't far off the mark at all. A smart-arse comment, absolutely, but did I
say it was my personal opinion?

As for......

....... No we have never really had anything to talk to each other about, to me a sign of us being quite different (whether we have
things in common or not). And no it doesn't bother me. No malice, just stating fact.

 

Touché!

Nice one.

Hammo

 

Good try Nev but the Hammoflage doesn't really work for you.
It's much simpler if you just accept that you're too pissweak to admit that
you're wrong (and you think that making yourself look stupid is somehow a
better situation).

 

Hmm... that even sorta' makes sense.
OK; good luck then.
--
Clem
(PS. It's about magnetism. The current running through the coils in the
alternator creates magnetism and as these magnets are moved in relation to
each other they create currents in each-other which, if allowed to flow,
produce magnetism themselves in the opposite direction.
So; no load = open circuit = no current = no magnetism = easy spin.
Full load = short circuit = maximum current = full magnetism in the opposite
direction = very hard spin!
That said; even with a short circuit you can only ever get almost as much
power out as you're pushing in (by spinning the alternator) so if you're
only pedalling 1 kilowatt-worth you can't run the lights at the MCG (even if
the design of the alternator could transfer all of the input energy to the
output 100% efficiently)

 

See below.

My apologies, I misread what you were suggesting as your posts have often
been brief, pointed and coming from an angle that was not directly related
to the topic, but rather (as it seemed to be) personal in nature.

Hammo

 

I'd guess you felt they were more personal than they were in reality following my comment "It's all about you..." which was simply a
glib comment stemming from the general discussion about cars and alternators as a whole, which you then came in and asked to be
shown what you have (greatly narrowing that part of the discussion in that part of the thread). You then went for personal comments,
suggesting I had gone sooky la-la.

I think at the time I suggested to you that you were not aware of the intentions surrounding my remark. Read the thread in sequence,
then imagine me making the comments with a cheeky grin.

 

Clem



OK, thanks. I think we're tantalisingly close. I moved away from
alternators because they use electro-magnets which complicate the
discussion. That's why I substituted a dynamo, with static magnets and a
spinning squirrel cage (coil).

Now I thought that the magnetic field offered up by the static magnets
was fixed, and the amount of current in the system was determined solely
by the speed the squirrel cage rotates within that field.

I think what you are trying to tell me is that the spinning coil can
amplify or reduce the magnetic field of the static magnets depending on
the electrical demand (load) on the circuit. That's the bit I don't
understand.

Actually, there's another bit to do with electro-magnets and the lights
at the MCG that I don't understand either, but let's get the static
magnets out of the way first.

--
Cheers

Andrew

(and if I'd found a aus.electrics.for.n00bs I'd've posted there instead,
but I didn't)

 

Well stop introducing all that tripe into the debate and I won't have to
point out it's irrelevance eh Hammo.
Just like Bill Murray's character in the movie when YOU finally do the
correct thing Ground Hog day ends.

 

Well; three ways.
You can train up on the subject; read heaps and become an expert yourself,
OR
You can read this thread and have it explained to you OR
You can just make up some wild-arsed idea and then stick to it even though
it makes no sense. (Like Nev did).
Choice is yours.

Far more variables there than lights-on/lights-off.

No no; I meant look from the top downwards.

 

*more*

 

That windows up = less drag vs air-con theory has been around a while.
I remember a feller in aus.cars trying it out in a rental car on a run from
Adelaide-Woomera and back (or somewhere equally flat and devoid of things
that could affect the calculations) and I thiiiiink it came out in favour of
the windows.
Different cars, different engines, different air-con settings may swing the
results in the other direction though.

Send it to Mythbusters!

 

Don't get sucked in to feeling guilty Dale;
The "Why are you being hurtful when I was only trying to help...." response
is also standard-operating-procedure in Hammoland.

 

Oh no fear there Clem. There's not one iota of guilt here.

 

Mythbusters already did it.

Nev..
'04 CBR1100XX