Double Deckers for SMRT
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Originally posted by TIB 501 D:
Precisely, like you said before...
For DDs, the top deck's weight is exerting pressure on the lower deck, and thus work is done against gravity.
While for bendies, it's just an additional trailer section, no work done against gravity.
The top deck is exerting weight, not pressure.
Pressure= force/area
Weight= mass x gravitational pull on the earth -
Originally posted by SBS6305H:
The top deck is exerting weight, not pressure.
Pressure= forcexarea
Weight= mass x gravitational pull on the earthOh ok...
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Top deck weight + people at the top deck.
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Originally posted by SMB195G:
Top deck weight + people at the top deck.
People at the rear
...To prevent the trailer section swinging dangerously due to Xtra weight
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Originally posted by TIB 501 D:
People at the rear
...To prevent the trailer section swinging dangerously due to Xtra weight
!I like to sit alone at the last seats on the trailer. That type of ride damn shiok.
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Originally posted by SBS6305H:
The top deck is exerting weight, not pressure.
Pressure= forcexarea
Weight= mass x gravitational pull on the earthPressure = force/area ...
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Originally posted by SMB145B:
Pressure = force/area ...
Oops! Sry! :-/ -
isn't just abt weight... there's dynamics [as the vehicle moves off, like the tendency bendies have inertia that pulls the backside to the rear], mechanics [forces related issues] and applied load...
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Originally posted by sbst275:
isn’t just abt weight…
there’s dynamics [as the vehicle moves off, like the tendency bendies have inertia that pulls the backside to the rear], mechanics [forces related issues] and applied load…
you made me lol
i should see more of the bumps in the tuas area
trailers at the container terminals?
so bendies have more inertia than DDs?
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Originally posted by SMB145B:
you made me lol
i should see more of the bumps in the tuas area
trailers at the container terminals?
so bendies have more inertia than DDs?
do you realise bendy bus can't be modelled the same as trailers for analysis purposes in reality? The trailers does not swing back as like the bendy buses... because the engine is at the front, the container load is at the rear... Bendy bus, the engine is at the articulated end which can swing back... -
DDs exert more weight in a lesser area...
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that's static... but bendy also had dynamic factor to consider
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Originally posted by Gus.chong:
Only people who don't understand the pull of gravity will say bendy is heavier.
ha.
hahahaha!!!
Its only fair to say that you surpassed yourself today.
Ya. I dont understand how your pull of gravity works.
Since you find it so hard to say "sorry, I am wrong" usually, today I will alpha demo show you:
I stand corrected.
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Originally posted by sbst275:
that’s static… but bendy also had dynamic factor to consider
liddat might as well say that planes are making changi sink, MRTs are making the whole island sink, buildings are making the island sink -
eh... I've stated there's one bus stop that has bus stop bay road sinking... why of all roads, specifically those bus stop bays are affected? dan474... I think you still dunno what the dynamics problem is... The engine is mounted on a body frame that's not on a properly stable/ rigid structure!
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I didn't know SQ planes can flex like bendy bus's backside... gosh... should I take a plane then... lol
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Aiyo.
Leave it to the engineers la.
I can only confirm bendies are heavier.
If you are talking about footprint, I have no idea.
Unless you guys know something I dont.
And after looking at "gravity", "pressure", "weight", I think we should leave it at that. Before I laugh harder.
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and to answer the qn over airport runway... Airport runway do have lifespan... after a certain no of years, it has to be repaired... all the depression where it's at the very pt of the aircraft's landing...
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Originally posted by sbst275:
and to answer the qn over airport runway…
Airport runway do have lifespan… after a certain no of years, it has to be repaired… all the depression where it’s at the very pt of the aircraft’s landing…
i assume roads have lifespans too, after a certain period of time it has to be resurfaced. unnless its as thick as a runwah -
Some common sense will tell you that bendies should be heavier than DDs....
For most cases at least, especially for those with the pusher arrangement.
Since many of you guys are lazy to find out like myself, at least have some logic....for the sake of stopping me from laughing.
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Originally posted by dan474:
DDs exert more weight in a lesser area…
How do you know?
Crunch the numbers first before I believe.
The footprint is more complex than you think....the weight distribution also complicates matters. Giving me the average footprint is not good enough.
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Comparing weight of DD and Bendy...
If you are comparing a Vo2x to a Bendy, obviously the Vo2x is light because it does not have a A/C unit, and is shorter.
If it is a Vo3x/VSO, think of something unique to each of them, other than the aesthetic changes.
Yes, DDs uses lightweight aluminium similar to those of an airplane. Bendies? Nope. Bendies have 2 categories : Rear mounted Engine or Mid-mounted Engine, Rear mounted engine seems to be heavier, like the Hispanos, they are rear mounted. Cause the pressure is all at the rear axle, after the articulator, rather than a DD with 3 axle, where there are 2 wheels at the rear to spread the weight.
Just imagine, would you like to be stepped on by a lady wearing high heels or a man with a croc shoe? You tell me. -
Originally posted by SBS2601D:
Some common sense will tell you that bendies should be heavier than DDs....
For most cases at least, especially for those with the pusher arrangement.
Since many of you guys are lazy to find out like myself, at least have some logic....for the sake of stopping me from laughing.
SBS9199C - unladen weight = 14190 KGS
SBS9399S - unladen weight = 14420 KGS
SBS9599G - unladen weight = 14380 KGS
SBS9670H - unladen weight = 14200 KGS
SBS9849K - unladen weight = 14830 KGS
SBS7499A - unladen weight = 15800 KGS
SBS7686B - unladen weight = 15400 KGS
SBS3229P - unladen weight = 14920 KGS
TIB904A - unladen weight = 15470 KGS
TIB1001Z unladen weight = 15 680 KGS
TIB1197S unladen weight = 15440 KGS
TIB1247G unladen weight = 15990 KGSnot really much different....
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Originally posted by lemon1974:
SBS9199C - unladen weight = 14190 KGS
SBS9399S - unladen weight = 14420 KGS
SBS9599G - unladen weight = 14380 KGS
SBS9670H - unladen weight = 14200 KGS
SBS9849K - unladen weight = 14830 KGS
SBS7499A - unladen weight = 15800 KGS
SBS7686B - unladen weight = 15400 KGS
SBS3229P - unladen weight = 14920 KGS
TIB904A - unladen weight = 15470 KGS
TIB1001Z unladen weight = 15 680 KGS
TIB1197S unladen weight = 15440 KGS
TIB1247G unladen weight = 15990 KGSnot really much different....
I disagree.
1. Its clear already from the numbers that the bendies seen here are heavier. The exception being the strangely heavy 7499A.
2. If we compare the lightest DD and the heaviest bendy here, the difference is nearly 2 tonnes. To put in another perspective, that is 15% more. If that is not significant enough, I dont know what is.
3. Is it as simple to talk about pressure and what-not? I dare not speak of such stuff as I am not an engineer. To put simply, because the bendy is heavier, but puts more tyre on the floor, you cannot just conclude that the footprint would be less/more! Numbers have to be crunched, and taking into account the weight distribution, each tyre will take different loads, further complicating the numbers. Eg. The mid-engine B10MA has a more even weight distribution, and despite being heavier than the VO3X, its unclear if the footprint will be more/less on the driving axle, to name one, because of the different weight distribution.
4. Thanks for the numbers anyhow....I appreciate that.
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Originally posted by SBS2656X:
Comparing weight of DD and Bendy...
If you are comparing a Vo2x to a Bendy, obviously the Vo2x is light because it does not have a A/C unit, and is shorter.
If it is a Vo3x/VSO, think of something unique to each of them, other than the aesthetic changes.
Yes, DDs uses lightweight aluminium similar to those of an airplane. Bendies? Nope. Bendies have 2 categories : Rear mounted Engine or Mid-mounted Engine, Rear mounted engine seems to be heavier, like the Hispanos, they are rear mounted. Cause the pressure is all at the rear axle, after the articulator, rather than a DD with 3 axle, where there are 2 wheels at the rear to spread the weight.
Just imagine, would you like to be stepped on by a lady wearing high heels or a man with a croc shoe? You tell me.Go crunch the numbers before I bother debating with your likes.