[lesmore49]

If it was the Canadian version of Uff da or Uffta it would be "Sorry".

Forgeddaboutit....No more meaningless apologies from this Canadian !!

Mark, hope I didn't offend you or anything...if so....I apologize in advance.

[robtcorl]

Any one miss Bert's bagpipes?
Me neither.
Hope our son is faring well at summer camp.

[StiffLegged]

Any one miss Bert's bagpipes?
Me neither.
Hope our son is faring well at summer camp.

I for one will miss his verbal profligacy in the forthcoming raffle for a Limited: just have to blither more meself to compensate!

[JimJohnson]

Sorry, but you're both wrong. It's spelled with a d, not a t, and it's two words. Uff da.

You are of course correct. I must have let the Texas influence addle my spelling. That's my story and I'm sticking with it. Yee Haw! [don't bother looking that one up in your Funk & Wagnall's either!]

[Yaki]

I apologize for breaking the joke - But I really want to answer the topic
Because my К3 III finally arrived

[Racer X 69]

My Volvo was a different beast compared to Racer's Volvos. My Volvo weighed in at about 2,600-2,700 pounds in fighting trim. Racer's Volvo trucks...I dunno...probably around 12,000 to 15,000 depending on number of axles, wheels, frame, engine size....12, 15, 16 liters, and that is just the highway tractor, no trailer attached

My Volvo, the PV 544s sedan with it's 1,8 liter engine, one light drive axle, etc....could be push started by one person (me).

I would put the gear shift in neutral, open the driver's door, push on the door frame with my left hand and push on the steering wheel with my right hand...get the car up to about 3 mph....jump into the driver's seat, push the clutch pedal in, shift to 2nd gear, switch the ignition to on....drop the clutch....and usually the engine would turn over enough to catch....I would then push in the clutch pedal, rev the bejeebers out of the Volvo engine, quick shift to first gear, drive off.

I was 20 years old, big and strong, fast reactions and agile. Half a century later....many of those personal characteristics have waned. At my age now, I would just call CAA to come and give the car a boost.

Semi tractors with sleepers weigh in at 25,000 to 30,000 lbs.

Volvo tractors are at the high end, with a steel cab, and extra insulation (way quieter than the other makes).

The blue Volvo had a 15 liter Cummins ISX, rated at 550 hp.

The Black Volvo also had a 15 liter Cummins ISX, rated at 500 hp.

The green Volvo had a 13 liter Volvo engine, rated at 375 hp (I disliked that truck for its lack of power).

The maroon Freightliner Cascadia had a 15 liter Detroit engine, rated at 495 hp.

The Peterbilt 379 had a 15 liter Caterpillar Acert engine, rated at 500 hp.

[lesmore49]

Semi tractors with sleepers weigh in at 25,000 to 30,000 lbs.

Volvo tractors are at the high end, with a steel cab, and extra insulation (way quieter than the other makes).

The blue Volvo had a 15 liter Cummins ISX, rated at 550 hp.

The Black Volvo also had a 15 liter Cummins ISX, rated at 500 hp.

The green Volvo had a 13 liter Volvo engine, rated at 375 hp (I disliked that truck for its lack of power).

The maroon Freightliner Cascadia had a 15 liter Detroit engine, rated at 495 hp.

The Peterbilt 379 had a 15 liter Caterpillar Acert engine, rated at 500 hp.

I did not know semi tractors with sleepers, weighed that much. I was out by quite a few pounds.

The hp of the different large semi diesels is quite a bit and even more impressive in terms of numbers are the torque ratings.

In comparison, my '62 Volvo PV544s had a 1.8 liter gas engine, rated at around 90 hp.

[Racer X 69]

I apologize for breaking the joke - But I really want to answer the topic
Because my К3 III finally arrived

Huh?

[lesmore49]

Any one miss Bert's bagpipes?
Me neither.
Hope our son is faring well at summer camp.

I'm sure he is doing fine. I believe he said it will be Canadian military basic training, which isn't easy, according to a few people I know who have gone through it . I don't know if he took his pipes with him. If he did, he will probably be too tuckered and puckered to play, even a note or two.

[StiffLegged]

I apologize for breaking the joke - But I really want to answer the topic
Because my К3 III finally arrived

Hah! You’ll have to try much much harder before you’ll break this joke (and thread), sorry .....

[StiffLegged]

I did not know semi tractors with sleepers, weighed that much. I was out by quite a few pounds.

The hp of the different large semi diesels is quite a bit and even more impressive in terms of numbers are the torque ratings.

In comparison, my '62 Volvo PV544s had a 1.8 liter gas engine, rated at around 90 hp.

A little arithmetic suggests its engine, if scaled up to 15 litres, would be rated around 750hp and you might wonder why truckers drive such underpowered wagons. (runs away very quickly.....!)

[Racer X 69]

A little arithmetic suggests its engine, if scaled up to 15 litres, would be rated around 750hp and you might wonder why truckers drive such underpowered wagons. (runs away very quickly.....!)

The horsepower may scale up nicely, but the torque of the 15 liter 550 horsepower Cummins ISX was around 1,200 ft lbs.

Gas engines usually have torque ratings far lower.

For instance, the Datsun 240Z had an L24 engine rated at 150 hp, and torque was something like 140 ft lbs. Impressive, but it would never outpull a diesel engine.

[lesmore49]

A little arithmetic suggests its engine, if scaled up to 15 litres, would be rated around 750hp and you might wonder why truckers drive such underpowered wagons. (runs away very quickly.....!)

As Racer said, heavy pulling requires big torque numbers and that is something that is in the province of large, turbo charged diesel engines, as you would find in a semi tractor.
OEM on the internet says about some....newer..... Cummins 15 liter turbo charged diesel:

"Cummins Inc. has redefined efficiency once again by releasing three new ISX15 ratings ideal for premium fleets or performance-oriented line-haul applications. The new 475-, 450- and 400-hp ratings with 1,850 lbs.-ft. of torque will provide an optimal blend of performance and fuel efficiency for high-load applications or fleets that frequently encounter mountainous terrains and require strong pulling power."

You'll note that the torque this engine generates is around four times the hp that it makes. Lbs.-ft. of torque is really what moves extremely heavy weights , such as a heavily laden semi trailer. Also these large turbo charged diesel truck engines, can generate almost the full torque rating throughout the rpm powerband of the engine...so a driver has close to it's maximum rating of 1,800 + lbs.- ft. of torque ...throughout it's rev range, coupled with multi geared transmissions that are designed to keep the torque /hp ratings at optimum level, while this truck is pulling it's many thousand pound load.

It is quite a science, of which I have only a superficial understanding. Racer knows much more than I do, and will correct if I am in error.

[Parallax]

The horsepower may scale up nicely, but the torque of the 15 liter 550 horsepower Cummins ISX was around 1,200 ft lbs.

Gas engines usually have torque ratings far lower.

Not only do diesels develop more torque, they produce it at a MUCH lower RPM.
My 6.7 Cummins has a torque curve that is very nearly flat. It has nearly as much at 1800 RPM as it has at its peak, which is around 3000 RPM. Some gas engines don't hit peak until nearly 5000 and the curve can be very steep.

[Racer X 69]

I meant to mention that the Volvo tractor weighed in at around 30,000 lbs, flatbed trailers add another 10,000 lbs or so, allowing for loads of around 40,000 lbs, as the maximum legal gross weight is 80,000.

The lighter tractors allow for loads around 45,000 lbs.

There are tractor trailers with extra axles that can be licensed to around 105,000 lbs GVW depending upon how many axles and tires they have.