Ok is my instructor messing with me?

[A Squared]

Bearing in mind what Goose wrote above, I'd say pneumatic. For one thing, you have to inflate it. Secondly, no fluids are being pushed through lines to make it operate.

Neither is air being pushed through lines to make it operate, so that reasoning goes nowhere. Fluids however, are being pushed through orifices when it operates.

I can think of 8 other hydraulic devices in the 172. Anyone?

 

[ROB-x38]

8! Ok feel stupid now....

A few guesses:

- CSU (for those with one fitted)
- Hobbs / engine hours switch
- Oil pressure gauge
- Oil pressure annunciator
- Fuel flow gauge
- Oil pressure relief valve

That's all I got - am I even in the ballpark A squared?

 

[A Squared]

8! Ok feel stupid now....

A few guesses:

- CSU (for those with one fitted)
- Hobbs / engine hours switch
- Oil pressure gauge
- Oil pressure annunciator
- Fuel flow gauge
- Oil pressure relief valve

That's all I got - am I even in the ballpark A squared?

That's good, but they aren't the ones I'm thinking of.

 

[bobbysamd]

172 hydraulics

The brake system is hydraulically-operated.

This is beginning to sound like one of those stupid, useless, hypertechnical ERAU discussions from the early nineties, e.g., how many fuel pumps are there in a Seminole, with no correct answers and plenty of hurt feelings. In other words, define "pump."

 

[Vector4fun]

That's good, but they aren't the ones I'm thinking of.

I'll try one;

Primer

 

[80/20]

Wings of Flem, tell us a bit more… why do you think he asked you this?
Did you sense that he liked or respected you?
Did you ask, or did he offer any suggestions to where you might find the answer to his question?
Was he giving you the test before the lesson or was he just teaching by asking question rather than lecturing you?
Answer this and I will give you my personal opinon - as a FAA Designee

 

[A Squared]

I'll try one;

Primer

THere's another, though it wasn't one I was thinking about.

Here's a clue: I cheated, they aren't 8 different things, they are all the same, but there's 8 of them. The number should be a good hint.

Bobby, if you're going to have hurt feelings about a silly trivia game (and yes I recognize that it's trivia) it might be best to avoid them.

 

[JB74]

Here's a clue: I cheated, they aren't 8 different things, they are all the same, but there's 8 of them. The number should be a good hint.

Maybe I am way off but are you talking about the hydraulic lifters in the engine?

 

[Vector4fun]

Maybe I am way off but are you talking about the hydraulic lifters in the engine?

I just had the same thought driving home. Cam followers.

 

[A Squared]

Maybe I am way off but are you talking about the hydraulic lifters in the engine?

Bingo! Pretty lame, huh?

 

[JediNein]

Just noticed your profile, A Squared, hope you're still flying and you get back to the left seat soon.

Fly SAFE!
Jedi Nein

 

[A Squared]

Just noticed your profile, A Squared, hope you're still flying and you get back to the left seat soon.

Fly SAFE!
Jedi Nein

Jedi,

Thanks for the thought. Yeah, I'm still flying, just from the right hand-seat. Tha company had some cut-backs, and I was pretty junior as a captain so I got downgraded. Hopefully it will all work out soon.

 

[bobbysamd]

Bobby, if you're going to have hurt feelings about a silly trivia game (and yes I recognize that it's trivia) it might be best to avoid them.

Maybe I am way off but are you talking about the hydraulic lifters in the engine?

Bingo! Pretty lame, huh?

Definitely. My feelings never get hurt; I've dealt with worse things. But, hypertechnical discussions such as this border on the asinine.

 

[JAFI]

Bobby, part of me agrees with you and part does not. If the intent of the question is a "stump the dummy" question, then I agree, it is asinine. If the question is to pass on knowledge or to expand the students mind or thinking ability, then I say it is an academic benefit. If the intent of the question is to get the students nose into the POH, then it is a benefit. The C-172 POH is tiny compared to any aircraft that requires a type rating. If you can get the student into the simpler systems then IMHO, the complex systems will come easier.

There were mechanical lifters in older engines, now they are mostly hydraulic, not part of the hydraulic system but moved by hydraulic action. I think if that distinction were made it would be a valid question.

JAFI

 

[bobbysamd]

Stump the dummy

Bobby, part of me agrees with you and part does not. If the intent of the question is a "stump the dummy" question, then I agree, it is asinine. If the question is to pass on knowledge or to expand the students mind or thinking ability, then I say it is an academic benefit. If the intent of the question is to get the students nose into the POH, then it is a benefit. The C-172 POH is tiny compared to any aircraft that requires a type rating. If you can get the student into the simpler systems then IMHO, the complex systems will come easier.

There were mechanical lifters in older engines, now they are mostly hydraulic, not part of the hydraulic system but moved by hydraulic action. I think if that distinction were made it would be a valid question.

(emphasis added)

That's essentially where I'm coming from. I don't regard hydraulic lifters as being a "hydraulic system." A fair question might be to ask how the lifters of the airplane engine are operated.

I dealt with a lot of this nonsense at ERAU. There were (inbred) ERAU stage check pilots who asked these questions of students, who (1) had no access to the shop manuals or wherever this "information" was found and (2) did not have the question defined sufficiently to answer the question.

A favorite question was the number of fuel pumps in a Seminole. Define "fuel pump." Most people would consider fuel pumps to be the electrically-driven pumps and the engine-driven pumps because these were gizmos that actually moved fluid from tank to engine so the answer is four, two for each engine. However, the answer varied from stage check pilot to stage check pilot, because some believed the throttle pumps were fuel pumps, while others regarded the carburetor pumps as fuel pumps. (I even heard fuel injectors falling under the definition of fuel pump because they "pump" gas into the combustion chambers.) I do not recall of any agreed-upon answer or definition of fuel pump for the Seminole. Answer the question wrong and a student would be downgraded on his/her stage check, so it was critical to provide the "correct" "answer." Riddlers would stress over the answer. For these reasons, I regard many of these questions as asinine.