Direct Drive

[mechanic]

Thanks for all the clarification. Even with 20 years of mechanic experiance I can still make a mistake!

 

I was thinking Power Train in my thought process, not just the power plant only. Why would the fan/cage/impeller what ever you want to call it, not be part of the power plant? A water pump is part of a power plant. Is it because its not integrel to the block?

 

Thanks

mechanic

[RotorWeed]

Thanks for all the clarification. Even with 20 years of mechanic experiance I can still make a mistake!

 

I was thinking Power Train in my thought process, not just the power plant only. Why would the fan/cage/impeller what ever you want to call it, not be part of the power plant? A water pump is part of a power plant. Is it because its not integrel to the block?

 

Thanks

mechanic

 

For the same reason a propeller, transmission, generator, or pulley sheave is not part of the power plant. They are all bolted to the output shaft of the power plant.

 

RW

[mechanic]

For the same reason a propeller, transmission, generator, or pulley sheave is not part of the power plant. They are all bolted to the output shaft of the power plant.

 

RW

 

I knew that answer was coming! But, I see that the aviation aircooled engines doesn't come factory with a cooling system. So they depend on an outside source. All the aircooled and water cooled engines I service come with the system installed as a unit from the factory and is considered part of the engine. Esp on all the aircooled outdoor power utility engines.

 

The engines I work on would be the direct drive type. But the power train is in-direct on the majority of the machines. I do have a little freak of an eng/trans combination that, the engine and trans share the same oil/filter, and the engine has no oil pan because it sits on the top case of the hydrostatic transaxle, .

 

They can have an electric clutch, friction clutch, sheave/belt, or driveshaft off the crank pto side or the flywheel side, turning a hydrostatic trans, hydorstatic transaxle, gear type transmission, or gear type transaxle to name a few diff ways I see daily.

 

This year has been the worst year on the job, stress wise, and I have been there 13 years. I need a vacation, but can't take one due to my company being so busy, and the family has decided to go on one with out me to her sisters in FL, .

 

I hope I didn't make anyone mad with the questions.

 

Later

[Gomer Pylot]

Anyone who get mad because someone asked questions can safely be ignored.

[james28]

thanks for asking mechanic, i learned something new!

[Jeff]

The Cessna 421 has gear drive engines also. Another example of non-direct drive.

 

On the same topic, are turbine engines equipped with gear reduction outputs? It seems to me that they would be based on their internal RPMs of 20,000 +.

 

Jeff

[apiaguy]

yes, the geared engines on the 421 are the Continental GTSIO-520 that I mentioned in the earlier post...

 

Turbine engines with a reduction gearbox are called "turbo-prop" or "turbo-shaft" engines.... the output gearbox shaft is reduced to a reasonable rpm depending on the installation, airplane or helicopter.

Turbine engines on jets do not have reduction gearboxes... they are called "turbo-jet" or "turbo-fan" engines depending on their configuration and the air flowing thru them pushes the aircraft instead of being converted to power to drive a gearbox or propeller.