Search found 3369 matches

by airplay
Wed Nov 14, 2001 12:13 pm
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

VC-10, All is not lost! Note that the flag note says "Not on all airplanes". If that bypass was required why isn't it on all airplanes? Second, read paragraph F. It states that: "If less than maximum cooling capacity is required from the system, the mix valve is modulated to allow part of the air fr...

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by airplay
Wed Nov 14, 2001 9:11 am
Forum: Technical/Operations
Topic: For The Real Mech Wizards
Replies: 2
Views: 5084

RE: For The Real Mech Wizards

Older voltage regulators like you find in older Learjets (and Beavers for that matter) were pretty standard. They used a military standard regulator with a corresponding regulator mounting bracket. There were no tools required to remove and install the regulators in the mount although sometimes you ...

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by airplay
Wed Nov 14, 2001 8:41 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

Hey! It worked!

Here's the page describing operation. As you'll note, the by-pass valve labeled "35 degree valve" bypasses the ACM when the discharge temperature is in danger of falling below freezing.....

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by airplay
Wed Nov 14, 2001 8:37 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

Okay...lets give it a try! Thanks for the help VC-10. Here's a schematic of the 727 cooling pack. It's a simplified diagram and I'm sure it's missing a few minor details. <img src=http://members.home.net/airplay1/727acm.jpg> I have never come across an ACM "bypass" valve who's function was to "start...

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by airplay
Wed Nov 14, 2001 3:51 am
Forum: Technical/Operations
Topic: INS/FMS/fMC
Replies: 36
Views: 4508

RE: INS/FMS/fMC

EssentialPwr, Do yourself a favor and check out the pictures of aircraft on Airliners.net. Then maybe you'll realize that the world doesn't stop at the US border. There are several of the aircraft types you questioned in commercial operation in the world. Where I live there are several EMB110s, HS-7...

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by airplay
Wed Nov 14, 2001 3:36 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

VC-10,

How do you display that picture without having to use a link??

Cheers

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by airplay
Tue Nov 13, 2001 1:21 pm
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

Why answer? It's like talking to a post. I presented data directly from Boeing that concurred with my statement and you dismissed it. Tell you what...I have several reference copies of aircraft AMMs at work. Which do you want me to scan and post? They all say the same thing. And the schematic diagra...

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by airplay
Tue Nov 13, 2001 1:14 pm
Forum: Technical/Operations
Topic: INS/FMS/fMC
Replies: 36
Views: 4508

RE: INS/FMS/fMC

Thats funny, I've been involved in certification of FMSs in the following out of your list in aircraft that were delivered without an FMS or FMC: Lear 31 (and Lear 35) Lear 24 (It just got a GPS because he didn't need an FMS) BAE HS125-700 BAE HS125-800A GI GII CL600-2A12 CL600-2B16(3A) Falcon 50 Fa...

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by airplay
Tue Nov 13, 2001 12:03 pm
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

My goodness... Even when faced with proof that you're wrong, you continue. I presented black and white evidence and you chose to ignore it. And then you pull out another "snippet": "...and secondary heat exchanger before it reaches the turbine. A bypass is installed to enable startup." And state it ...

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by airplay
Tue Nov 13, 2001 9:26 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

EssentialPwr...

By the way, your description of the 737 system is shakey too....




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by airplay
Tue Nov 13, 2001 9:17 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

EssentialPwr, I went to the trouble of getting ahold of the 727 AMM, since as you stated it is the system you are most "familiar" with. I also reviewed several other aircraft including jets and turborprops. Based on my long investigation, I see absolutely nothing wrong with my explaination. All of t...

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by airplay
Mon Nov 12, 2001 2:17 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

EssentialPwr, I think I've made my point and you need to learn to just let go. Air "passes" through the compressor first. You said: "Air coming in the FCV in your diagram will NOT FLOW through the compressor by itself. It leaves the compressor at a HIGHER PRESSURE" And you say it with such convictio...

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by airplay
Sun Nov 11, 2001 2:48 pm
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

Darn....

Sent you to the wrong website. Go to:

http://perso.wanadoo.fr/mirabilevisu/PACK.htm

After you've checked that out tell me where the bleed air goes first.

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by airplay
Sun Nov 11, 2001 2:45 pm
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

EssentialPwr, Here's my sentence as you've stated (in full for the first time I might add, thank you very much): "So unlike a turbocharger whose compressor is run by directly driving the turbine, the air in an ACM has to pass through the compressor first" The air that drives the turbine DOES pass th...

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by airplay
Sun Nov 11, 2001 9:22 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

I guess that's where we disagree EssentialPwr. My post is not incorrect.

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by airplay
Sun Nov 11, 2001 12:30 am
Forum: Civil Aviation
Topic: Old Flight Attendents
Replies: 48
Views: 2517

RE: Old Flight Attendents

Andreas, Well spoken! Hopefully the some of the opinions expressed here are not indicative of our society at large. The ridiculous notion that "older" people should be taken out of the public's view in an attempt to promote a company's image is intolerable. Further, the idea that older people have s...

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by airplay
Sun Nov 11, 2001 12:11 am
Forum: Technical/Operations
Topic: Sevens And Threes
Replies: 4
Views: 1155

RE: Sevens And Threes

Here's another thread unrelated to tech/ops.

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by airplay
Sun Nov 11, 2001 12:10 am
Forum: Technical/Operations
Topic: Aviation Sayings
Replies: 42
Views: 18563

RE: Aviation Sayings

Does this thread belong in "tech/ops"???

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by airplay
Sat Nov 10, 2001 9:17 am
Forum: Civil Aviation
Topic: Old Flight Attendents
Replies: 48
Views: 2517

RE: Old Flight Attendents

The bias against age contained in this thread is abhorrent. I can't beleive that people can be so shallow or superficial to believe that the level of service or good company image is based on the age of the flight attendants whether they are 20 or 50. Some of you people need to grow up.

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by airplay
Fri Nov 09, 2001 3:49 am
Forum: Technical/Operations
Topic: Flight That Pass Through Anchorage
Replies: 8
Views: 2154

RE: Flight That Pass Through Anchorage

Ts-ior, Yes I know. Some people can't read another reply without taking a defensive stance. I was merely stating the "primary" reason for overflight of Canada and Anchorage. In other words I was answering the original question. Nobody at that point dicussed great circle routes. Does Anchorage have a...

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by airplay
Thu Nov 08, 2001 12:27 pm
Forum: Civil Aviation
Topic: Real Reason Why TWA800 Exploded
Replies: 26
Views: 2259

RE: Real Reason Why TWA800 Exploded

I think the overall safety record of the 747 speaks volumes. We should all be so lucky to own a specific car model that we can run for 30 years for millions of miles just below mach 1 before a single (or one or two) catastrophic event involving the fuel tank occurs.

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by airplay
Thu Nov 08, 2001 12:16 pm
Forum: Technical/Operations
Topic: Flight That Pass Through Anchorage
Replies: 8
Views: 2154

RE: Flight That Pass Through Anchorage

Don't have any string or a globe? Check this link out:

http://gc.kls2.com/

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by airplay
Thu Nov 08, 2001 12:10 pm
Forum: Technical/Operations
Topic: Flight That Pass Through Anchorage
Replies: 8
Views: 2154

RE: Flight That Pass Through Anchorage

Actually, the main reason is because airplanes use "great circle" routes when navigating. the shortest distance between for example New York City and Tokyo is through northern Canada and Alaska. Don't beleive me? Don't use a mercator grid map to prove this. Take a length of string and connect these ...

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by airplay
Wed Nov 07, 2001 12:25 pm
Forum: Civil Aviation
Topic: Glass Cockpits? What Did They Use To Use?
Replies: 11
Views: 2568

RE: Glass Cockpits? What Did They Use To Use?

Actually,

Theys used to make cockpits out of wood, bailing wire, and bits of brass. Leather accents were optional.

 Smile

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by airplay
Wed Nov 07, 2001 12:20 pm
Forum: Civil Aviation
Topic: Air Canada Ordered To Liquidate 4billion In Assets
Replies: 28
Views: 3106

RE: Air Canada Ordered To Liquidate 4billion In Assets

Air Canada killed Canadian. I have no doubt. Air Canada came out swinging following privatization with no debt and tons of assets. They used the next fews years killing Canadian airlines with predatory pricing without regard to the cost. The bottom line is that Air Canada couldn't (and can't) provid...

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by airplay
Wed Nov 07, 2001 9:22 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

VC-10, I'm assuming you're describing one specific type of ACM. I've never seen one that operates the way you describe. Of course that doesn't mean it doesn't exist. This is an example of the difficulty in discussing every aspect of some complex systems. There are countless specific designs! I guess...

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by airplay
Wed Nov 07, 2001 3:47 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

EssentialPowr, Thank you for demonstrating the typical "Bully" attitude we see so often and really need less of in these forums. I won't let you intimidate me. You took a portion of sentence out of context and called me on it. I've attempted to point out your mistake and you've chosen to refuse to s...

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by airplay
Wed Nov 07, 2001 3:39 am
Forum: Technical/Operations
Topic: INS: How Does It Work?
Replies: 5
Views: 7092

RE: INS: How Does It Work?

Tom, excellent description for the purposes of this forum.

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by airplay
Mon Nov 05, 2001 2:39 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

I see we'll have to agree to disagree on this one. Not about how an ACM and a turbocharger work....on how you continually refuse to state my full sentence in your arguement. For instance, you wrote: "The compressor on a turbo or an ACM is driven......." In this "snippet" you do exactly the same thin...

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by airplay
Mon Nov 05, 2001 2:08 am
Forum: Technical/Operations
Topic: INS/FMS/fMC
Replies: 36
Views: 4508

RE: INS/FMS/fMC

How about this one: "I guess I misread it. Hhmmm." Yes. When I presented the DC-3 arguement I immediately stated that it was "silly". But true to form, you took one statement out of context and presented it as a new arguement. Just like I just did!  <img src="/discussions/graphics/smile.gif" AL...

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by airplay
Sun Nov 04, 2001 2:36 pm
Forum: Technical/Operations
Topic: INS/FMS/fMC
Replies: 36
Views: 4508

RE: INS/FMS/fMC

EssentialPwr, For some reason you've chosen me as a target for some sort of misplaced anger. You've also chosen to do it a typically childish way. You extract snippets of statements and present them out of context. For instance, I could present your statement: "I don't think one could find an airlin...

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by airplay
Sun Nov 04, 2001 2:25 pm
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

EssentialPwr.... You took a part of sentence out of context...AGAIN. The sentence: "So unlike a turbo-charger whose compressor is run by directly driving the turbine, the air in an ACM has to pass through the compressor first" Is correct because compressors are run by driving a turbine in an ACM and...

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by airplay
Sun Nov 04, 2001 2:12 pm
Forum: Technical/Operations
Topic: INS/FMS/fMC
Replies: 36
Views: 4508

RE: INS/FMS/fMC

EssentialPwr......

I didn't say that. It's the original question. You need to read the whole post before you comment.

It says:

"Does every airliner must have a navigation system like INS FMC, or FMS?
thanks"

The answer again in case you missed it was "no".

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by airplay
Sun Nov 04, 2001 10:03 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

One more thing to add...... In a turbocharger or jet engine, the high temperature air runs the turbine and the compressor is relatively cooler. In an Air Cycle Machine, the turbine is driven by cold air and the air running through the compressor is very hot. Don't believe me? Check out AskJeeves... ...

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by airplay
Sun Nov 04, 2001 9:50 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

EssentialPowr, You should read the whole sentance and not take snippets out of context. I said: "So unlike a turbo-charger whose compressor is run by directly driving the turbine, the air in an ACM has to pass through the compressor first. (This fact is the hardest to wrap your mind around)" In a tu...

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by airplay
Sun Nov 04, 2001 1:56 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

VC-10,

I was just addressing your statement that information about the ACM is located in chapter 21. This implies that pressurization is NOT.

Just clarifying for those WITHOUT 28 years experience.

 Smile

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by airplay
Sat Nov 03, 2001 9:04 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

"Air Conditioning" includes the pre-conditioning of the pneuamatic supply that pressurizes the cabin. So....any pressurized aircraft will involve conditioning of the air. Pressure and temperature control are intimately related and often are represented in Chapter 21. This includes everything downstr...

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by airplay
Sat Nov 03, 2001 8:58 am
Forum: Technical/Operations
Topic: How NDBs Work
Replies: 9
Views: 4276

RE: How NDBs Work

960 KHz is in the commercial broadcast frequency spectrum.

So...what are you telling me?

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by airplay
Fri Nov 02, 2001 3:10 pm
Forum: Technical/Operations
Topic: How NDBs Work
Replies: 9
Views: 4276

RE: How NDBs Work

Typical ADFs will receive between 200 KHz and 1700KHz. The "radio stations" you hear on the ADF are broadcasting on the commercial AM band. Some NDB stations (which are restricted to the 200 KHz to 500 KHz) sometimes transmit transcribed weather but I've never heard of them broadcasting commercial A...

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by airplay
Fri Nov 02, 2001 2:57 pm
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

Metwrench, Your statement about the pressure of the air leaving the ACM is erroneous. (If I understand your intent) A typical inlet pressure at the compressor is about 45 PSI. The pressure is reduced at the outlet of the turbine to about 14 PSI. That's a pretty significant decrease. In general, pres...

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by airplay
Thu Nov 01, 2001 1:11 pm
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

Metwrench, I didn't say that the ACM was a "free turbine" type. (At least that's not what I meant. I said the the ACM consists of a compressor and a turbine on a single shaft. That certainly doesn't imply "free turbine". I think maybe the confusion came in when I said the compressor and turbine comp...

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by airplay
Wed Oct 31, 2001 11:58 am
Forum: Technical/Operations
Topic: INS/FMS/fMC
Replies: 36
Views: 4508

RE: INS/FMS/fMC

Yes I agree that an FMS is useful. I just disagree that "ALL" commercial aircraft have one. As far as the "maintenance" page you speak of, depending on the FMS this can represent 2 different things: 1) FMS maintenance pages that allow for FMS configuration programming and maintenance to the FMS 2) F...

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by airplay
Wed Oct 31, 2001 11:51 am
Forum: Technical/Operations
Topic: Pressurization ACM
Replies: 205
Views: 16595

RE: Pressurization ACM

Some incorrect information here... The ACM consists of a compressor and a turbine on a single shaft. The compressor and turbine compartments are separated in the ACM. Much like they are in a turbo-charger. Air enters the compressor side at temperatures that typically run about 100 C. following compr...

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by airplay
Tue Oct 30, 2001 9:26 am
Forum: Technical/Operations
Topic: INS/FMS/fMC
Replies: 36
Views: 4508

RE: INS/FMS/fMC

EssentialPowr I think you're mistaking other aircraft systems with an FMS in the case of the F/A 18 or the maintenance function you speak of. Flight computers make unstable aircraft like the F/A 18 fly. CAMS systems provide integrated maintenance systems that can be merely displayed on an FMS. And y...

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by airplay
Mon Oct 29, 2001 12:29 pm
Forum: Technical/Operations
Topic: INS/FMS/fMC
Replies: 36
Views: 4508

RE: INS/FMS/fMC

The term "Commercial Aircraft" is a pretty broad paint-brush. Just about every commercial aircraft does NOT have an FMS or FMC and for that matter an INS system. Many modern airliners however do have this sort of thing. Alot of it depends on what the role of the airliner is. Why spend money on IRS i...

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by airplay
Mon Oct 29, 2001 7:47 am
Forum: Civil Aviation
Topic: Canada 3000 Take Air Canada "Tango" To Court...
Replies: 73
Views: 4705

RE: Canada 3000 Take Air Canada "Tango" To Court...

Nobody seems to be discussing the obvious: Air Canada can't offer discount fairs without losing money. If the mainline can't do it why on earth would we believe the discount "arm" can???? This goes beyond competition. Air Canada consistently goes after the competition by offering predatory pricing i...

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by airplay
Mon Oct 29, 2001 7:33 am
Forum: Technical/Operations
Topic: A/c Antenna's
Replies: 3
Views: 2725

RE: A/c Antenna's

And like anything to do with airplanes there's no easy answer!  <img src="/discussions/graphics/smile.gif" ALT="Smile"> Modern ADF system use a combined loop/sense antenna so you don't need the long wire. Some airliner antennas are incorporated into fuselage parts and fairings so they are not o...

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by airplay
Thu Oct 25, 2001 9:21 am
Forum: Technical/Operations
Topic: DME Arcs Without An RMI
Replies: 9
Views: 5531

RE: DME Arcs Without An RMI

Sounds easier to buy an RMI...  <img src="/discussions/graphics/smile.gif" ALT="Smile"> An approach GPS can help do a good job as well. After loading in the approach from the database (not all of them are gonna be in there for sure) Just dial in the course that the box tells you. You can correc...

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by airplay
Thu Oct 25, 2001 9:17 am
Forum: Technical/Operations
Topic: Static Wicks
Replies: 9
Views: 18480

RE: Static Wicks

Just one thing to add.... Static wicks control the rate at which the airframe discharges. They offer very high resistance to the flow, typically 20 Megohms or more. The reason for this is to avoid arcing which is what eventually causes radio noise. If they were simply made of wire or other good cond...

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by airplay
Wed Oct 24, 2001 12:36 pm
Forum: Civil Aviation
Topic: American Behaving Badly
Replies: 7
Views: 1538

RE: American Behaving Badly

Price of tickets go down...quality of passengers go down. When I was a kid everyone dressed up to get on a flight. Now halter tops and flip-flops are typical fare. As for misbehavior, the Americans don't have a monopoly on boorish behavior. Different cultures have their own little quirks. I don't th...

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