"Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message
news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za...
> What makes a heavy vehicle like a bakkie, truck, or van get into motion so
> easily? You have to change gears very quickly but you can release the
clutch
> right after it starts moving.

Who uses a clutch? For other than the initial start and final stop, I mean.

> What I am trying to say is it is easier to pull away with a vehicle that
has
> this close gear configuration.
>
> What do you call this?

Close ratio

--
Brian
www.accesswave.ca/~orion

 

"Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message
news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za...
> What makes a heavy vehicle like a bakkie, truck, or van get into motion so
> easily? You have to change gears very quickly but you can release the
clutch
> right after it starts moving.

Who uses a clutch? For other than the initial start and final stop, I mean.

> What I am trying to say is it is easier to pull away with a vehicle that
has
> this close gear configuration.
>
> What do you call this?

Close ratio

--
Brian
www.accesswave.ca/~orion

 

"Brian Smith" <Halifax@NovaScotia.Canada> wrote in message
news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca...
>
> "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message
> news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za...
> > What makes a heavy vehicle like a bakkie, truck, or van get
into motion so
> > easily? You have to change gears very quickly but you can
release the
> clutch
> > right after it starts moving.
>
> Who uses a clutch? For other than the initial start and final
stop, I mean.
>
> > What I am trying to say is it is easier to pull away with a
vehicle that
> has
> > this close gear configuration.
> >
> > What do you call this?
>
> Close ratio

Nope.
Close ratio refers to the the difference between all the gears.
That is, the ratio between 1st and top is closer than usual.
In a close ratio box this usually gives a relatively high 1st
gear.
Meaning you have to slip the clutch more to pull away.
A low 1st gear ratio is all that's needed to enable an easier
pull away from rest.
Most HGV vehicles only need 1st gear when fully laden.
Mike.

 

"Brian Smith" <Halifax@NovaScotia.Canada> wrote in message
news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca...
>
> "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message
> news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za...
> > What makes a heavy vehicle like a bakkie, truck, or van get
into motion so
> > easily? You have to change gears very quickly but you can
release the
> clutch
> > right after it starts moving.
>
> Who uses a clutch? For other than the initial start and final
stop, I mean.
>
> > What I am trying to say is it is easier to pull away with a
vehicle that
> has
> > this close gear configuration.
> >
> > What do you call this?
>
> Close ratio

Nope.
Close ratio refers to the the difference between all the gears.
That is, the ratio between 1st and top is closer than usual.
In a close ratio box this usually gives a relatively high 1st
gear.
Meaning you have to slip the clutch more to pull away.
A low 1st gear ratio is all that's needed to enable an easier
pull away from rest.
Most HGV vehicles only need 1st gear when fully laden.
Mike.

 

"Brian Smith" <Halifax@NovaScotia.Canada> wrote in message
news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca...
>
> "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message
> news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za...
> > What makes a heavy vehicle like a bakkie, truck, or van get
into motion so
> > easily? You have to change gears very quickly but you can
release the
> clutch
> > right after it starts moving.
>
> Who uses a clutch? For other than the initial start and final
stop, I mean.
>
> > What I am trying to say is it is easier to pull away with a
vehicle that
> has
> > this close gear configuration.
> >
> > What do you call this?
>
> Close ratio

Nope.
Close ratio refers to the the difference between all the gears.
That is, the ratio between 1st and top is closer than usual.
In a close ratio box this usually gives a relatively high 1st
gear.
Meaning you have to slip the clutch more to pull away.
A low 1st gear ratio is all that's needed to enable an easier
pull away from rest.
Most HGV vehicles only need 1st gear when fully laden.
Mike.

 

"Brian Smith" <Halifax@NovaScotia.Canada> wrote in message
news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca...
>
> "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message
> news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za...
> > What makes a heavy vehicle like a bakkie, truck, or van get
into motion so
> > easily? You have to change gears very quickly but you can
release the
> clutch
> > right after it starts moving.
>
> Who uses a clutch? For other than the initial start and final
stop, I mean.
>
> > What I am trying to say is it is easier to pull away with a
vehicle that
> has
> > this close gear configuration.
> >
> > What do you call this?
>
> Close ratio

Nope.
Close ratio refers to the the difference between all the gears.
That is, the ratio between 1st and top is closer than usual.
In a close ratio box this usually gives a relatively high 1st
gear.
Meaning you have to slip the clutch more to pull away.
A low 1st gear ratio is all that's needed to enable an easier
pull away from rest.
Most HGV vehicles only need 1st gear when fully laden.
Mike.

 

"Mike G" <mgibbs@clara.co.uk> wrote in message
news:1070571313.15605.0@damia.uk.clara.net...
>
> Nope.
> Close ratio refers to the the difference between all the gears.
> That is, the ratio between 1st and top is closer than usual.

Okay, I'll stand corrected. But, the gears are close together in a 13, 15 or
18 speed transmission. I only bump the throttle a couple of hundred of rpms
between shifts.

> Most HGV vehicles only need 1st gear when fully laden.

That's true, enough.

--
Brian
www.accesswave.ca/~orion

 

"Mike G" <mgibbs@clara.co.uk> wrote in message
news:1070571313.15605.0@damia.uk.clara.net...
>
> Nope.
> Close ratio refers to the the difference between all the gears.
> That is, the ratio between 1st and top is closer than usual.

Okay, I'll stand corrected. But, the gears are close together in a 13, 15 or
18 speed transmission. I only bump the throttle a couple of hundred of rpms
between shifts.

> Most HGV vehicles only need 1st gear when fully laden.

That's true, enough.

--
Brian
www.accesswave.ca/~orion

 

"Mike G" <mgibbs@clara.co.uk> wrote in message
news:1070571313.15605.0@damia.uk.clara.net...
>
> Nope.
> Close ratio refers to the the difference between all the gears.
> That is, the ratio between 1st and top is closer than usual.

Okay, I'll stand corrected. But, the gears are close together in a 13, 15 or
18 speed transmission. I only bump the throttle a couple of hundred of rpms
between shifts.

> Most HGV vehicles only need 1st gear when fully laden.

That's true, enough.

--
Brian
www.accesswave.ca/~orion

 

"Mike G" <mgibbs@clara.co.uk> wrote in message
news:1070571313.15605.0@damia.uk.clara.net...
>
> Nope.
> Close ratio refers to the the difference between all the gears.
> That is, the ratio between 1st and top is closer than usual.

Okay, I'll stand corrected. But, the gears are close together in a 13, 15 or
18 speed transmission. I only bump the throttle a couple of hundred of rpms
between shifts.

> Most HGV vehicles only need 1st gear when fully laden.

That's true, enough.

--
Brian
www.accesswave.ca/~orion

 

Brian Smith <Halifax@NovaScotia.Canada> wrote in message
news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca...
>
> "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message
> news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za...
> > What makes a heavy vehicle like a bakkie, truck, or van get into motion
so
> > easily? You have to change gears very quickly but you can release the
> clutch
> > right after it starts moving.
>
> Who uses a clutch? For other than the initial start and final stop, I
mean.

Well, it depends on what you drive and how quickly you want to change gear.
In my car the revs don't drop quickly enough to get anything approaching a
quick change without the clutch. Obviously, the clutch takes a little more
hammer helping to slow the engine down. Probably better to break and replace
my clutch than the syncro rings. If your car has a lot of engine braking
(mine doesn't, something to do with emissions or helping stupid people
change gear, revs don't drop quickly at all) or a light flywheel, or a very
close gearbox, clutchless changing becomes simpler. In many cars I expect it
would be royal pain in the ****.

 

Brian Smith <Halifax@NovaScotia.Canada> wrote in message
news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca...
>
> "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message
> news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za...
> > What makes a heavy vehicle like a bakkie, truck, or van get into motion
so
> > easily? You have to change gears very quickly but you can release the
> clutch
> > right after it starts moving.
>
> Who uses a clutch? For other than the initial start and final stop, I
mean.

Well, it depends on what you drive and how quickly you want to change gear.
In my car the revs don't drop quickly enough to get anything approaching a
quick change without the clutch. Obviously, the clutch takes a little more
hammer helping to slow the engine down. Probably better to break and replace
my clutch than the syncro rings. If your car has a lot of engine braking
(mine doesn't, something to do with emissions or helping stupid people
change gear, revs don't drop quickly at all) or a light flywheel, or a very
close gearbox, clutchless changing becomes simpler. In many cars I expect it
would be royal pain in the ****.

 

Brian Smith <Halifax@NovaScotia.Canada> wrote in message
news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca...
>
> "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message
> news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za...
> > What makes a heavy vehicle like a bakkie, truck, or van get into motion
so
> > easily? You have to change gears very quickly but you can release the
> clutch
> > right after it starts moving.
>
> Who uses a clutch? For other than the initial start and final stop, I
mean.

Well, it depends on what you drive and how quickly you want to change gear.
In my car the revs don't drop quickly enough to get anything approaching a
quick change without the clutch. Obviously, the clutch takes a little more
hammer helping to slow the engine down. Probably better to break and replace
my clutch than the syncro rings. If your car has a lot of engine braking
(mine doesn't, something to do with emissions or helping stupid people
change gear, revs don't drop quickly at all) or a light flywheel, or a very
close gearbox, clutchless changing becomes simpler. In many cars I expect it
would be royal pain in the ****.

 

Brian Smith <Halifax@NovaScotia.Canada> wrote in message
news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca...
>
> "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message
> news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za...
> > What makes a heavy vehicle like a bakkie, truck, or van get into motion
so
> > easily? You have to change gears very quickly but you can release the
> clutch
> > right after it starts moving.
>
> Who uses a clutch? For other than the initial start and final stop, I
mean.

Well, it depends on what you drive and how quickly you want to change gear.
In my car the revs don't drop quickly enough to get anything approaching a
quick change without the clutch. Obviously, the clutch takes a little more
hammer helping to slow the engine down. Probably better to break and replace
my clutch than the syncro rings. If your car has a lot of engine braking
(mine doesn't, something to do with emissions or helping stupid people
change gear, revs don't drop quickly at all) or a light flywheel, or a very
close gearbox, clutchless changing becomes simpler. In many cars I expect it
would be royal pain in the ****.

 

On Thu, 4 Dec 2003 20:54:21 -0000, "Mike G" <mgibbs@clara.co.uk> wrote
:


>Most HGV vehicles only need 1st gear when fully laden.
>Mike.
>
>

Talking of which.

Any HGV drivers favourite gearbox out there ?

I haven't driven for some years now but mine was a Fuller
rangechanger.

Well fast.




--

JR

Genesis 38:8-10