why does the truck lift up

[alumi numb]

Re: why does the truck lift up

I'd just like a good explanation of what the half shaft lengths has to do w/ it??
Mike

there is just a whole bunch of things that can influence torque steer but your just asking about the half shaft.
the long shaft will flex more than the short shaft "twist".
the body and wheels are level so the short shaft will have more angle to it than the long shaft "nonsymmetrical angle".
any time for any reason you change the direction of energy you loose some energy.
the greater the angle the more you loose.
every pilot out there is highly aware of this.
the sharper the turn the more power needs to be apllied.
physics is a wonderful thing.

 

[Fl_Richard]

Re: why does the truck lift up

I cant believe this thread's still going....

 

[EsoxRanger]

Re: why does the truck lift up

Try driving a Michigan Train and keep the front end on an even keel.
11 axles down 160,000# GVW, you learn real quickly to wind them up tighter than a Rolex...........

 

[QC]

Re: why does the truck lift up

Agreed ^^^^^ but try it on a real Road Train . . . :

That's 140 Metric tons, your load is 72 Metric tons and a typical US truck is 36 (80,000 lbs) . . . This is basically a US Driveline, CAT C15 with an 18 speed, 18 axles, oh and it burns 90% Natural Gas. Other than that just some simple regular everyday truck

18 speed because it must be kept wound up, buuuuut 1200 RPM full load would not hurt it.

 

[45Auto]

Re: why does the truck lift up

Well, QC, the important question is does it have a V6 or a V8? And are you claiming that it'll run in the 60's?

 

[alumi numb]

Re: why does the truck lift up

Agreed ^^^^^ but try it on a real Road Train . . . :

That's 140 Metric tons, your load is 72 Metric tons and a typical US truck is 36 (80,000 lbs) . . . This is basically a US Driveline, CAT C15 with an 18 speed, 18 axles, oh and it burns 90% Natural Gas. Other than that just some simple regular everyday truck

18 speed because it must be kept wound up, buuuuut 1200 RPM full load would not hurt it.

why don't we do that, will never understand?????????????
the australion road trains seem very efficient.
old train beds could be used as well as other means.
big rigs should have there own lane and cars have theres.
that way no dealing with stupid a holes passing on the right.
no dealing with stupid that blocks you from moving over as traffic is merging.

 

[Summer Fun]

Re: why does the truck lift up

Ayuh,... Sounds like you've been driving Detroits too long...

I've never drove a Mack with a Detroit engine in one. . GMC yes !!. My Mack is 525hp.

 

[QC]

Re: why does the truck lift up

Just noticed I never mentioned Australia . . . Doh!

Like all good (and modern) HD truck engines, it's an inline 6 . . . For fun, these trucks are geared for 90 kmh cruise. I have no doubt it would do 60 mph if unbound by gearing and/or electronics, under the right conditions. Like pretty much any truck, when spec'ing a truck like this you need to consider every single aspect including tightest turn it will encounter, any grades, road material and condition. These run mostly that red dirt in the pic. It might not be worth a damn on any deviation from it's intended route. Basically junk except within it's intended application. There, extremely valuable.

They may run these for a million Ks before an engine. They do not mess around with rebuilds much and usually buy a brand new, as in just manufactured, if they go another cycle. Very different environment than what we encounter here, and again, the predominant equipment at the highest weights, is US driveline and truck. Which is odd to me as we run the lightest GVW trucks (except Michigan and some Western states) in the world. Heck, regular on-highway Europe is 44 metric tons (97,000 lbs) on 6 axles. There it's all Volvo, DAF (PACCAR), Mercedes and Scania (used to own SAAB) . . . Those Road Trains are all Kenworth (PACCAR) and Freightliner (Mercedes) with a CAT or Cummins and Eaton stuff.

 

[jkust]

Re: why does the truck lift up

Just to confuse the issue....... wait until you drive a High Performance front wheel drive and it torque steers into another lane!!

How is it that when you read those reviews of new highpower sedans that they "eliminated torque steer" as a measure of the engineering?

 

[alumi numb]

Re: why does the truck lift up

How is it that when you read those reviews of new highpower sedans that they "eliminated torque steer" as a measure of the engineering?

lots of things can help but here are a few.
the use of a lay shaft makes both half shafts equal.
double wish bone or multi link suspension help reduce t/s.
worm gear torque biasing limited slip differentials.
power steering as well as steer by wire reduces the effect.
put all this stuff together and no torque steer just a m/t wallet.
now put a fat a's behind the wheel and your going to the left, just the way it is.
rear wheel drives do not have this problem under hard exceleration.
but with them the back end wants to pass the front end.
want to power slid a front drive, this is how you do it.
drop a gear so lots of torque in the turn and foot on the gas.
left foot on the brake both feet modulating things.
the brake dragging on the rear tires will help them brake loose thus hanging the tail out.
you won't get it right the first time or the second or third but it will come to you.