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Search: Posts Made By: italia458
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Forum: Tech Log
15th Jun 2012, 20:01
Replies: 156
Views: 91,286
Posted By italia458

Oggers!... You're still arguing the same point I...

Oggers!... You're still arguing the same point I clearly described at the beginning of this thread, eh! :hmm:
Forum: Tech Log
31st Mar 2012, 16:45
Replies: 156
Views: 91,286
Posted By italia458

oggers: You're wrong. End of story. ...

oggers:

You're wrong. End of story.

There is no point explaining it anymore.

Good day!
Forum: Tech Log
31st Mar 2012, 14:42
Replies: 156
Views: 91,286
Posted By italia458

barit1: No. THP has to do with...

barit1:



No. THP has to do with aircraft performance. When it's on a testbed, you wouldn't be analyzing THP. The engine would be producing thrust and you could compute how efficient the engine...
Forum: Tech Log
31st Mar 2012, 13:52
Replies: 156
Views: 91,286
Posted By italia458

oggers: We had never talked about a wind...

oggers:

We had never talked about a wind before and I had assumed that there would be no wind. Therefore, with no wind, TAS is the same as GS.

You hold onto it as if you 'won' or something. If...
Forum: Tech Log
30th Mar 2012, 23:36
Replies: 156
Views: 91,286
Posted By italia458

oggers: You accusing me of holding out info...

oggers:

You accusing me of holding out info and trying to guilt trip me has been bugging me. I shared all the resources I was using throughout this discussion. You and everyone else had access to...
Forum: Tech Log
30th Mar 2012, 23:01
Replies: 156
Views: 91,286
Posted By italia458

oggers: I don't care what you think. I...

oggers:



I don't care what you think. I was not sitting on that information. 'Induced power' had not entered my mine ONCE while in this discussion. Would it have been easier to mention induced...
Forum: Tech Log
30th Mar 2012, 17:59
Replies: 156
Views: 91,286
Posted By italia458

rudderrudderrat: It would be good to read...

rudderrudderrat:

It would be good to read this.
Forum: Tech Log
30th Mar 2012, 17:06
Replies: 156
Views: 91,286
Posted By italia458

I do not care what you're doing with the elevator...

I do not care what you're doing with the elevator and rudder. If the forces are balanced, the aircraft WILL NOT turn. End of story.
Forum: Tech Log
30th Mar 2012, 17:03
Replies: 156
Views: 91,286
Posted By italia458

When did I say that equation wasn't correct? I...

When did I say that equation wasn't correct? I don't think you realize that the equation in that form is very basic. The terms THP, SHP and p.e. all expand to include a heck of a lot of variables....
Forum: Tech Log
30th Mar 2012, 15:58
Replies: 156
Views: 91,286
Posted By italia458

oggers: Is this a guilt trip now? We...

oggers:



Is this a guilt trip now? We were never talking about induced power. Don't blame me for your inadequacies in understanding material. I kept it pretty simple I thought - obviously not....
Forum: Tech Log
30th Mar 2012, 15:53
Replies: 156
Views: 91,286
Posted By italia458

rudderrudderrat: You're going to have...

rudderrudderrat:



You're going to have to actually listen to what I say. What is the equation for THP? You'll find that TAS is in that equation.



As I've said before, being on the earth...
Forum: Tech Log
30th Mar 2012, 15:41
Replies: 156
Views: 91,286
Posted By italia458

I know... sorry. It gets frustrating having to...

I know... sorry. It gets frustrating having to consistently repeat myself, especially when the recipients will not accept the way things really are.

Feynman sums up what I think about this: you...
Forum: Tech Log
30th Mar 2012, 15:16
Replies: 156
Views: 91,286
Posted By italia458

oggers: I don't disagree with anything...

oggers:



I don't disagree with anything he said! I hope you realize that he also agreed with what I said!

Like he says, you don't know how good your prop is doing at making thrust by...
Forum: Tech Log
30th Mar 2012, 15:06
Replies: 156
Views: 91,286
Posted By italia458

You're correct, except for that last sentence....

You're correct, except for that last sentence. Look at this picture taken from NAVAVSCOLSCOM-SG-111: http://i.imgur.com/R43ho.png

The speed of the aircraft (to be specific it would be the TAS of...
Forum: Tech Log
30th Mar 2012, 13:00
Replies: 156
Views: 91,286
Posted By italia458

rudderrudderrat: You are perfectly...

rudderrudderrat:



You are perfectly balanced and that means that there is no net acceleration. Imagine the earth to be stopped (not rotating). It would still have this gravity force as it's...
Forum: Tech Log
30th Mar 2012, 05:32
Replies: 156
Views: 91,286
Posted By italia458

Yup! You got it. Thrust is a force. It's the same...

Yup! You got it. Thrust is a force. It's the same as me pushing really hard against the side of a big box. If the box doesn't move, I haven't done any work. I have sure used a lot of energy though!...
Forum: Tech Log
30th Mar 2012, 04:23
Replies: 156
Views: 91,286
Posted By italia458

CYHeli: Yes, thrust is what is...

CYHeli:



Yes, thrust is what is opposing the force of gravity. But THP is different!



Yes, the ground is the reference and it is not irrelevant! You could hover in one position over the...
Forum: Tech Log
30th Mar 2012, 02:23
Replies: 156
Views: 91,286
Posted By italia458

CYHeli: I completely agree. It might...

CYHeli:



I completely agree. It might be good to specify that the "power (lift)" you mention is BHP(SHP) as we've been talking about THP as well.

blackhand:
Forum: Tech Log
30th Mar 2012, 01:35
Replies: 156
Views: 91,286
Posted By italia458

Hi blackhand: Insults eh? All...

Hi blackhand:



Insults eh? All mechanics are good for is turning bolts... don't try to think about physics. My analogy is correct... learn how to spell. Read this:...
Forum: Tech Log
29th Mar 2012, 20:58
Replies: 156
Views: 91,286
Posted By italia458

oggers... As ft said, you're not contributing to...

oggers... As ft said, you're not contributing to anything here. You consistently keep ignoring my questions asking you to prove your point and instead try to find any way that you can prove me wrong....
Forum: Tech Log
29th Mar 2012, 15:11
Replies: 156
Views: 91,286
Posted By italia458

Hi rudderrudderrat: Yes I agree with the...

Hi rudderrudderrat:

Yes I agree with the quote you provide from the Navy document. Do you understand that the Navy document does not mean what you had previously said about THP? The following...
Forum: Tech Log
29th Mar 2012, 01:28
Replies: 156
Views: 91,286
Posted By italia458

Yes, the slope of the line = thrust. What's your...

Yes, the slope of the line = thrust. What's your point? The reason the slope equals thrust is because of the equation: Power = thrust x speed. The slope of any line is rise over run. And that equals...
Forum: Tech Log
28th Mar 2012, 16:20
Replies: 156
Views: 91,286
Posted By italia458

Oggers... I'm done dealing with this. You're...

Oggers... I'm done dealing with this. You're going to have to figure this out on your own. Or just be happy with your answer knowing that all these textbooks say that you're wrong. I could derive the...
Forum: Tech Log
28th Mar 2012, 03:12
Replies: 156
Views: 91,286
Posted By italia458

Harold... that's a repeat of what was already...

Harold... that's a repeat of what was already said on the thread. It also caused a decent amount of confusion. Can you be more specific about the propeller torque you mention? What specific force and...
Forum: Tech Log
28th Mar 2012, 00:47
Replies: 156
Views: 91,286
Posted By italia458

oggers... To clarify further: You seem to...

oggers... To clarify further:

You seem to understand that Power required = drag x airspeed.

Drag is the same as Thrust required for level flight; it's basically the force that needs to be...
Forum: Tech Log
27th Mar 2012, 15:42
Replies: 156
Views: 91,286
Posted By italia458

See, that's the difference between you and I. You...

See, that's the difference between you and I. You seem to think that credibility is in a name (in general and in particular, in another thread). I believe credibility is in the truth or accuracy of...
Forum: Tech Log
27th Mar 2012, 13:14
Replies: 156
Views: 91,286
Posted By italia458

I can see that that might be exactly what he...

I can see that that might be exactly what he wanted to know. To me it seems obvious as Fnet=ma. When there is no acceleration (ie: steady RPM), there has to be no net force. This whole thing is...
Forum: Tech Log
26th Mar 2012, 16:59
Replies: 156
Views: 91,286
Posted By italia458

Propeller torque is measured after the gearbox....

Propeller torque is measured after the gearbox. So measuring 'engine torque after the gearbox' is propeller torque! Both would be measured in the same place so they would obviously be the same.

I...
Forum: Tech Log
26th Mar 2012, 16:25
Replies: 156
Views: 91,286
Posted By italia458

I understand it very well. We should probably...

I understand it very well. We should probably wait until he responds to see what he meant!

I'd recommend checking out this article to see the difference between power and torque. If you realized...
Forum: Tech Log
26th Mar 2012, 16:00
Replies: 156
Views: 91,286
Posted By italia458

Very quick to throw the insults out. Yes, I am a...

Very quick to throw the insults out. Yes, I am a flight instructor. Here is today's lesson:

When talking about performance, the paragraph below is appropriate.

"Power is the rate of doing...
Forum: Tech Log
26th Mar 2012, 14:46
Replies: 156
Views: 91,286
Posted By italia458

So when he said "propeller torque" and "engine...

So when he said "propeller torque" and "engine torque".... he really meant "thrust horsepower" and "brake horsepower"? :ugh:



Thrust horsepower is equal to thrust multiplied by velocity (TAS)....
Forum: Tech Log
26th Mar 2012, 06:01
Replies: 156
Views: 91,286
Posted By italia458

Ah yes, that might be what he's referring to. ...

Ah yes, that might be what he's referring to.



Yes and no. When the engine is rotating at any RPM, constant or not, it is creating a turning moment (torque) on the airplane. This is due to the...
Forum: Tech Log
26th Mar 2012, 04:58
Replies: 156
Views: 91,286
Posted By italia458

Like Mad Scientist said, torque is torque. In the...

Like Mad Scientist said, torque is torque. In the case you mentioned, one is measured at the propeller and one at the engine (crankshaft). Propeller torque will be less than engine torque, mainly due...
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