Torquing bolts

[Bufallobiff]

Our fastener distributor put on a little symposium on nuts and bolts. Accd. to him, torque specs apply to NEW hardware only. Any anti-seize or loctite on the threads will give a false reading. Torquing old stuff will normally get you close.

[hampshirehog]

I've got plans to pop one of these motors in my PC50 - she might make over 40mph then....

[Steve]

I've got plans to pop one of these motors in my PC50 - she might make over 40mph then....

She might make over 40 mph, but not for long. You're gonna have to stop for fuel every so often too.

Check out the rest of the specs for the engine:

The Wartsila-Sulzer RTA96-C turbocharged two-stroke diesel engine is the most powerful and most efficient prime-mover in the world today. The Aioi Works of Japan's Diesel United, Ltd built the first engines and is where some of these pictures were taken.
It is available in 6 through 14 cylinder versions, all are inline engines. These engines were designed primarily for very large container ships. Ship owners like a single engine/single propeller design and the new generation of larger container ships needed a bigger engine to propel them.
The cylinder bore is just under 38" and the stroke is just over 98".
Each cylinder displaces 111,143 cubic inches (1820 liters) and produces 7780 horsepower.
Total displacement comes out to 1,556,002 cubic inches (25,480 liters) for the fourteen cylinder version.

Some facts on the 14 cylinder version:
Total engine weight:2300 tons (The crankshaft alone weighs 300 tons.)
Length:89 feetHeight:44 feet
Maximum power:108,920 hp at 102 rpm
Maximum torque:5,608,312 lb/ft at 102rpm
Fuel consumption at maximum power is 0.278 lbs per hp per hour (Brake Specific Fuel Consumption).
Fuel consumption at maximum economy is 0.260 lbs/hp/hour.
At maximum economy the engine exceeds 50% thermal efficiency. That is, more than 50% of the energy in the fuel in converted to motion.
For comparison, most automotive and small aircraft engines have BSFC figures in the 0.40-0.60 lbs/hp/hr range and 25-30% thermal efficiency range.
Even at its most efficient power setting, the big 14 consumes 1,660 gallons of heavy fuel oil per hour.

Let's assume a speed of 20 knots for the ship. That's just about 22 miles per hour.
Divided by 1660 gallons means that you will use about 75 gallons per mile. You will get about 70 feet per gallon.
Assuming about a 4-gallon tank on your bike, you will have to refill after travelling the length of a football field.



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[nisom512]

She might make over 40 mph, but not for long. You're gonna have to stop for fuel every so often too.

Check out the rest of the specs for the engine:

The Wartsila-Sulzer RTA96-C turbocharged two-stroke diesel engine is the most powerful and most efficient prime-mover in the world today. The Aioi Works of Japan's Diesel United, Ltd built the first engines and is where some of these pictures were taken.
It is available in 6 through 14 cylinder versions, all are inline engines. These engines were designed primarily for very large container ships. Ship owners like a single engine/single propeller design and the new generation of larger container ships needed a bigger engine to propel them.
The cylinder bore is just under 38" and the stroke is just over 98".
Each cylinder displaces 111,143 cubic inches (1820 liters) and produces 7780 horsepower.
Total displacement comes out to 1,556,002 cubic inches (25,480 liters) for the fourteen cylinder version.

Some facts on the 14 cylinder version:
Total engine weight:2300 tons (The crankshaft alone weighs 300 tons.)
Length:89 feetHeight:44 feet
Maximum power:108,920 hp at 102 rpm
Maximum torque:5,608,312 lb/ft at 102rpm
Fuel consumption at maximum power is 0.278 lbs per hp per hour (Brake Specific Fuel Consumption).
Fuel consumption at maximum economy is 0.260 lbs/hp/hour.
At maximum economy the engine exceeds 50% thermal efficiency. That is, more than 50% of the energy in the fuel in converted to motion.
For comparison, most automotive and small aircraft engines have BSFC figures in the 0.40-0.60 lbs/hp/hr range and 25-30% thermal efficiency range.
Even at its most efficient power setting, the big 14 consumes 1,660 gallons of heavy fuel oil per hour.

Let's assume a speed of 20 knots for the ship. That's just about 22 miles per hour.
Divided by 1660 gallons means that you will use about 75 gallons per mile. You will get about 70 feet per gallon.
Assuming about a 4-gallon tank on your bike, you will have to refill after travelling the length of a football field.



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HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA HAHAHAHAHAHAHAHAHAHAHAHAHAAH
that thing is so freakin sweet I want one so bad now.........HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA

[bucketsofgs1000]

So what's the torque spec on the connecting rod bolts?

In all seriousness, if you have access to a machinery's handbook, there are formulas for computing torque required based on either common joint loading, or a specified joint loading. I'm sure you can look up all kinds of formulas for those calcs on the net as well. It all depends on base metal, bolt material, and assumed bolt condition (new vs old). You can spec it to be torqued to the limit of thread ripout of the weaker thread, or you can spec it to obtain a desired normal force on the joint.

[hampshirehog]

You will get about 70 feet per gallon.
Assuming about a 4-gallon tank on your bike, you will have to refill after travelling the length of a football field.

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Shucks Steve, you sure know how to ruin a man's dreams...The PC only holds around a gallon so now I've got to toss up between 120mpg or 70 feet. Heck, 70 feet's long enough for a wheelie