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Re: gear ratio?
"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 |
Re: gear ratio?
"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 |
Re: gear ratio?
"Brian Smith" <Halifax@NovaScotia.Canada> wrote in message news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca... > > "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message > news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za... > > What makes a heavy vehicle like a bakkie, truck, or van get into motion so > > easily? You have to change gears very quickly but you can release the > clutch > > right after it starts moving. > > Who uses a clutch? For other than the initial start and final stop, I mean. > > > What I am trying to say is it is easier to pull away with a vehicle that > has > > this close gear configuration. > > > > What do you call this? > > Close ratio Nope. Close ratio refers to the the difference between all the gears. That is, the ratio between 1st and top is closer than usual. In a close ratio box this usually gives a relatively high 1st gear. Meaning you have to slip the clutch more to pull away. A low 1st gear ratio is all that's needed to enable an easier pull away from rest. Most HGV vehicles only need 1st gear when fully laden. Mike. |
Re: gear ratio?
"Brian Smith" <Halifax@NovaScotia.Canada> wrote in message news:3NMzb.114723$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. |
Re: gear ratio?
"Brian Smith" <Halifax@NovaScotia.Canada> wrote in message news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca... > > "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message > news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za... > > What makes a heavy vehicle like a bakkie, truck, or van get into motion so > > easily? You have to change gears very quickly but you can release the > clutch > > right after it starts moving. > > Who uses a clutch? For other than the initial start and final stop, I mean. > > > What I am trying to say is it is easier to pull away with a vehicle that > has > > this close gear configuration. > > > > What do you call this? > > Close ratio Nope. Close ratio refers to the the difference between all the gears. That is, the ratio between 1st and top is closer than usual. In a close ratio box this usually gives a relatively high 1st gear. Meaning you have to slip the clutch more to pull away. A low 1st gear ratio is all that's needed to enable an easier pull away from rest. Most HGV vehicles only need 1st gear when fully laden. Mike. |
Re: gear ratio?
"Brian Smith" <Halifax@NovaScotia.Canada> wrote in message news:3NMzb.114723$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. |
Re: gear ratio?
"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 |
Re: gear ratio?
"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 |
Re: gear ratio?
"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 |
Re: gear ratio?
"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 |
Re: gear ratio?
Brian Smith <Halifax@NovaScotia.Canada> wrote in message news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca... > > "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message > news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za... > > What makes a heavy vehicle like a bakkie, truck, or van get into motion so > > easily? You have to change gears very quickly but you can release the > clutch > > right after it starts moving. > > Who uses a clutch? For other than the initial start and final stop, I mean. Well, it depends on what you drive and how quickly you want to change gear. In my car the revs don't drop quickly enough to get anything approaching a quick change without the clutch. Obviously, the clutch takes a little more hammer helping to slow the engine down. Probably better to break and replace my clutch than the syncro rings. If your car has a lot of engine braking (mine doesn't, something to do with emissions or helping stupid people change gear, revs don't drop quickly at all) or a light flywheel, or a very close gearbox, clutchless changing becomes simpler. In many cars I expect it would be royal pain in the arse. |
Re: gear ratio?
Brian Smith <Halifax@NovaScotia.Canada> wrote in message news:3NMzb.114723$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 arse. |
Re: gear ratio?
Brian Smith <Halifax@NovaScotia.Canada> wrote in message news:3NMzb.114723$PD3.5802326@nnrp1.uunet.ca... > > "Johan Wagener" <pil(nospam)@webmail.co.za> wrote in message > news:TsOdnQi_D-UbDVKiU-KYiw@is.co.za... > > What makes a heavy vehicle like a bakkie, truck, or van get into motion so > > easily? You have to change gears very quickly but you can release the > clutch > > right after it starts moving. > > Who uses a clutch? For other than the initial start and final stop, I mean. Well, it depends on what you drive and how quickly you want to change gear. In my car the revs don't drop quickly enough to get anything approaching a quick change without the clutch. Obviously, the clutch takes a little more hammer helping to slow the engine down. Probably better to break and replace my clutch than the syncro rings. If your car has a lot of engine braking (mine doesn't, something to do with emissions or helping stupid people change gear, revs don't drop quickly at all) or a light flywheel, or a very close gearbox, clutchless changing becomes simpler. In many cars I expect it would be royal pain in the arse. |
Re: gear ratio?
Brian Smith <Halifax@NovaScotia.Canada> wrote in message news:3NMzb.114723$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 arse. |
Re: gear ratio?
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 |
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