Media / recordings of buses
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Dennis Trident SBS9674Y on 80
Customs Port Branch HQ to Chinatown MRT -
Mercedes-Benz OC500LE SMB13Z on 75
Esplanade to Shenton Way MAS Bldg. Notice the unique sound of the electronic suspension at work at 3:32 and 5:02.
Volvo B10M Mark IV DM SBS927C on 100
Finally one without TV Mobile!
Volvo Olympian SBS9208K on 132
The only VO3x with its ZF gearbox locking up at 2nd gear instead of 1st, which makes it switch gear like a Dennis Lance, Mark IV Strider or DM.
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Originally posted by ^tamago^:
Mercedes-Benz OC500LE SMB13Z on 75
Esplanade to Shenton Way MAS Bldg. Notice the unique sound of the electronic suspension at work at 3:32 and 5:02.LOVELY! Thanks for sharing!
Regards,
Dave -
Originally posted by ^tamago^:
Mercedes-Benz OC500LE SMB13Z on 75
Esplanade to Shenton Way MAS Bldg. Notice the unique sound of the electronic suspension at work at 3:32 and 5:02.
Volvo B10M Mark IV DM SBS927C on 100
Finally one without TV Mobile!
Volvo Olympian SBS9208K on 132
The only VO3x with its ZF gearbox locking up at 2nd gear instead of 1st, which makes it switch gear like a Dennis Lance, Mark IV Strider or DM.
Sounds exactly like any other VO leh....sounds like lock-up at 1st also. -
Now that I thought a little on the sound clip I heard on 9208K, here's my comments.
No. That's not the only VO that locks up at 2nd. A number do that. While the VOs are supposed to lock-up at 1st, there are some ZFs that are flexible enough to do that at 2nd instead.
Now that I think back, those VOs I took that abruptly "locked-up" early in 1st were actually transitions into 2nd, after which, the lock-up occurs. Half the time, this fails.
Initially I thought it was the lock-up disengaging because it engaged early.....but now I reckon its actually 2nd to 1st when the bus starts shuddering. The steeper than expected drop in rpm for such buses at that stage should be the biggest indication of 1st to 2nd rather than lock-up.
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how to hear lock-up ah?
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Originally posted by Powered_By_CNG:
LOVELY! Thanks for sharing!
Regards,
Dave
No problems Dave. (:
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Originally posted by SBS2601D:
Now that I thought a little on the sound clip I heard on 9208K, here's my comments.
No. That's not the only VO that locks up at 2nd. A number do that. While the VOs are supposed to lock-up at 1st, there are some ZFs that are flexible enough to do that at 2nd instead.
Now that I think back, those VOs I took that abruptly "locked-up" early in 1st were actually transitions into 2nd, after which, the lock-up occurs. Half the time, this fails.
Initially I thought it was the lock-up disengaging because it engaged early.....but now I reckon its actually 2nd to 1st when the bus starts shuddering. The steeper than expected drop in rpm for such buses at that stage should be the biggest indication of 1st to 2nd rather than lock-up.
There's a distinction between gear change and lock-up when there's an abrupt drop in rpm.
For the latter, I know some buses tend to lock-up too early and this means it has to lock-up again. This is due to a faulty setting, and fits the description you have described, which is, it fails half the time. They did not move on to the second gear but tried to rev again at first gear once more.
For the former, the pitch of the engine will be entirely different (though it may sound minimal to most people) when it's at second gear, and the rpm drop is actually not as abrupt as a faulty lock-up.
Most ZF gearboxes will, when it had cleared the first gear then dropped back to second gear and wishes to accelerate, lock-up at the second gear. This lock-up will sound like it is dragging and will take longer. The ones which will occasionally jump back to first gear and rev up again are usually LO3x's and 6HP's on B9TL and KUB. A small number of Striders do that too.
Maybe you can give me the regos of the VO3x's next time then I'll visit the buses. (: -
Originally posted by ^tamago^:
Mercedes-Benz OC500LE SMB13Z on 75
Esplanade to Shenton Way MAS Bldg. Notice the unique sound of the electronic suspension at work at 3:32 and 5:02.
Volvo B10M Mark IV DM SBS927C on 100
Finally one without TV Mobile!
Volvo Olympian SBS9208K on 132
The only VO3x with its ZF gearbox locking up at 2nd gear instead of 1st, which makes it switch gear like a Dennis Lance, Mark IV Strider or DM.I think that the MK IV DM recording is remarkably well-done.
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Originally posted by ak4711:
I think that the MK IV DM recording is remarkably well-done.
Just a poll, you're using earphones/headphones, or speakers?
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Originally posted by ^tamago^:
There's a distinction between gear change and lock-up when there's an abrupt drop in rpm.
For the latter, I know some buses tend to lock-up too early and this means it has to lock-up again. It should be a faulty setting.
For the former, the pitch of the engine will be entirely different (though it may sound minimal to most people) when it's at second gear, and the rpm drop is actually not as abrupt as a faulty lock-up.
Maybe you can give me the regos next time then I'll visit the buses. (:
Honestly I can't tell much from that clip....not to say that the quality sucked, but I have to be there to experience it haha.Initially I thought that for such VOs the lock-up is too early. But now I think back, these buses are closer to the Lance, MKIV etc etc than 9208K. These buses change to 2nd at fairly low rpm, then attempt to pull through 2nd at even lower rpms and then struggle to proceed to lock-up at 2nd. Obviously there's a reason why the VOs are usually made to lock-up at 1st and at fairly high rpms, because half the time you get a kick in your butt when the bus switches back to 1st.
In that clip however, I have no inkling of where's the lock-up, so honestly I can't say much about it. If you're looking for the above mentioned buses, I would say it is more likely to occur in the batch 3 types. Some I remember include 9630Z, 9638C. Light pressure on the pedal would induce that effect on these buses.
If the lock-up is early, I would expect a pause and a slight rpm drop. But for these VOs, the rpm drop is a little steep, and the pause is shorter than what I would expect for a lock-up. Lock-up takes longer and more jerky. And what I thought was transition to 2nd for these buses should actually be the lock-up. The change is more obvious and the drop in rpm is less.
And no wonder too.....a quick check on the gear ratios showed that the difference between 1st and 2nd are the greatest amongst the gears. Which proved all the more that these buses were actually changing from 1st to 2nd rather than locking-up.
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Originally posted by ^tamago^:
Just a poll, you're using earphones/headphones, or speakers?
Earphones/headphones. Gear change is really best already.
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Originally posted by SBS2601D:
Honestly I can't tell much from that clip....not to say that the quality sucked, but I have to be there to experience it haha.Initially I thought that for such VOs the lock-up is too early. But now I think back, these buses are closer to the Lance, MKIV etc etc than 9208K. These buses change to 2nd at fairly low rpm, then attempt to pull through 2nd at even lower rpms and then struggle to proceed to lock-up at 2nd. Obviously there's a reason why the VOs are usually made to lock-up at 1st and at fairly high rpms, because half the time you get a kick in your butt when the bus switches back to 1st.
In that clip however, I have no inkling of where's the lock-up, so honestly I can't say much about it. If you're looking for the above mentioned buses, I would say it is more likely to occur in the batch 3 types. Some I remember include 9630Z, 9638C. Light pressure on the pedal would induce that effect on these buses.
If the lock-up is early, I would expect a pause and a slight rpm drop. But for these VOs, the rpm drop is a little steep, and the pause is shorter than what I would expect for a lock-up. Lock-up takes longer and more jerky. And what I thought was transition to 2nd for these buses should actually be the lock-up. The change is more obvious and the drop in rpm is less.
And no wonder too.....a quick check on the gear ratios showed that the difference between 1st and 2nd are the greatest amongst the gears. Which proved all the more that these buses were actually changing from 1st to 2nd rather than locking-up.
Listen properly, and compare it to your normal ones. I think we may need a sound recording of another VO for comparison.
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Originally posted by ^tamago^:
Just a poll, you're using earphones/headphones, or speakers?
me use speakers, but i still can hear the engine/accelerating sounds
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Originally posted by Scania:
Listen properly, and compare it to your normal ones. I think we may need a sound recording of another VO for comparison.
Nah....if I'm lucky I would get to take this bus some day. -
Originally posted by ^tamago^:
There's a distinction between gear change and lock-up when there's an abrupt drop in rpm.
For the latter, I know some buses tend to lock-up too early and this means it has to lock-up again. This is due to a faulty setting, and fits the description you have described, which is, it fails half the time. They did not move on to the second gear but tried to rev again at first gear once more.
For the former, the pitch of the engine will be entirely different (though it may sound minimal to most people) when it's at second gear, and the rpm drop is actually not as abrupt as a faulty lock-up.
Most ZF gearboxes will, when it had cleared the first gear then dropped back to second gear and wishes to accelerate, lock-up at the second gear. This lock-up will sound like it is dragging and will take longer. The ones which will occasionally jump back to first gear and rev up again are usually LO3x's and 6HP's on B9TL and KUB. A small number of Striders do that too.
Maybe you can give me the regos of the VO3x's next time then I'll visit the buses. (:
Given enough pressure on the pedal, those that lock-up at 2nd are capable of doing it at first.....So nothing unusual about these cases. But for those that lock-up at 1st to do it at 2nd instead is more unusual I would say.
So it all depends on the BC's mood.
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Originally posted by ak4711:
Earphones/headphones. Gear change is really best already.
Okies. Seems like everyone prefers distinct transmission sounds.
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Originally posted by SBS2601D:
Nah....if I'm lucky I would get to take this bus some day.9208K on weekdays
Bt Merah 12.55pm
Hougang 2.15pm
Bt Merah 4.00pm
Saturdays Bt Merah at 1.25pm
Sundays Bt Merah at 4.11pm -
Originally posted by JaSoNhSu92:
how to hear lock-up ah?
anyone knows? -
Originally posted by SBS2601D:
Given enough pressure on the pedal, those that lock-up at 2nd are capable of doing it at first.....So nothing unusual about these cases. But for those that lock-up at 1st to do it at 2nd instead is more unusual I would say.
So it all depends on the BC's mood.
No no.... for VO's the lock-up gear setting is fixed. It can't choose to lock up at 2nd gear (for those set to 1st gear lock-up) unless it is already at 2nd gear.
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Originally posted by ^tamago^:
No no.... for VO's the lock-up gear setting is fixed. It can't choose to lock up at 2nd gear (for those set to 1st gear lock-up) unless it is already at 2nd gear.
That's why I was really surprised! -
Originally posted by JaSoNhSu92:
anyone knows?
If you could come for any outings, look for me. I can explain it to you.... or if the driver allows, you might want to observe the gear change of an OC500LE at the dashboard. Ignore the 5th and 6th gear and treat it as 4th, but most importantly look out for 1st gear on startup and 2nd gear lock-up after slowing down (e.g. after negotiating a bend or traffic junction).
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Originally posted by SBS2601D:
That's why I was really surprised!
No... it can't. Never seen any VO or even any ZF do it in my life. Probably I need to put in timings for comparision.
0:05 start 1st gear
0:08 2nd gear
0:11 2nd gear lock-up
0:15 3rd gear
0:25 4th gear
0:27 3rd gear
0:32 2nd gear
0:38 stop 1st gear
0:53 start 1st gear
0:56 2nd gear
0:59 2nd gear lock-up
1:05 3rd gear
1:21 4th gear
1:51 3rd gear
1:56 2nd gear
1:59 stop 1st gear
2:14 start 1st gear
2:16 2nd gear
2:18 2nd gear lock-up
2:20 3rd gear
2:27 4th gear
3:13 3rd gear
3:16 2nd gear
3:19 stop 1st gear -
Originally posted by ^tamago^:
If you could come for any outings, look for me. I can explain it to you.... or if the driver allows, you might want to observe the gear change of an OC500LE at the dashboard. Ignore the 5th and 6th gear and treat it as 4th, but most importantly look out for 1st gear on startup and 2nd gear lock-up after slowing down (e.g. after negotiating a bend or traffic junction).
its way too far to board OCs as such buses dont passby near me. i rather observe on KUBs and B9TLs. their accelerations was a music to me. anyway, thx for explanation.
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Originally posted by JaSoNhSu92:
me use speakers, but i still can hear the engine/accelerating sounds
earphones much better. u'll feel like u're in the bus.
