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liamksa

RE: CAT II/III Vis - See Threshold/Touchdown Point?

Vikkyvik you are spot on! I'm getting confused between aiming point and TDZ lighting.

Thanks mate

liamksa

CAT II/III Vis - See Threshold/Touchdown Point?

Gday just been having a look at Heathrow Chart 11-4A which is the CAT <acronym title="Business Air (United Kingdom)">II</acronym>/III ILS <acronym title="Moscow - Domodedovo (DME / UUDD), Russia">DME</acronym> 27R, and have a couple of quesitons regarding the minimum RVR and what you'd expect to see...

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liamksa

747 Procedures Resulting From Accidents/Incidents

G'day I am interested in examples of 747 tech crew airline procedures which have changed due to other aviation accidents or incidents. They don't have to be big, high profile, international accidents. Even small incidents which may have occured on the ramp/ground and led to a policy change. An exmap...

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liamksa

RE: Camera Suggestions

Thanks for the advice. Please keep it coming... Any experience out there with <a href="http://www.einfotech.com.au/shop/product_info.php?products_id=3500" target="_blank">Sony Cybershot DSC-W200</a> Additionally, with reference to the <a href="http://canon.com.au/products/cameras/digital_compact_cam...

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liamksa

Camera Suggestions

Gday folks... I'm in the market for a digital camera which will be used for a combination of aviation photography and social occasions. I believe you guys are the authorities so thought I might ask your opinions. These are the main requirements... 1. Small and neat (ie: a consistent shape which won'...

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liamksa

RE: I Got An Email From CNN About The AirChina Pilot..

Not airline related but another example of 'communication difficulties'...

http://www.youtube.com/watch?v=NjD67VZuYNU

(Contains some language)

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liamksa

RE: Autopilot Actuators/Servos

In <acronym title="Asiana Airlines (South Korea)">OZ</acronym>... SCHEDULE 8 Paragraph 42ZC (4) (d) MAINTENANCE THAT MAY <acronym title="Aircompany Tavria-Mac (Ukraine)">BE</acronym> CARRIED OUT <acronym title="Air Nauru">ON</acronym> A CLASS B AIRCRAFT <acronym title="OLD: Britannia Airlines (Unite...

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liamksa

RE: Turn Coordinator In A Spin

So the turn coordinate will still indicate the direction of the spin correctly even in an inverted spin? No. For aerobatic aircraft it is better to have a turn and balance indicator (bat and ball) rather than a turn coordinator. A turn coordinator is sensitive to both yaw and ro...

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liamksa

RE: Your Radio Comm. Pet Peeves

Not a peeve but gives me a laugh...

"Alpha Bravo Charlie, no need to acknowledge cleared to land"

"No need to acknowledge, Alpha Bravo Charlie"

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liamksa

RE: Cessna 172S Fuel Selector Valve

We hardly use the crossfeed valve on our 172/R whereas on the 414 it's not uncommon to use it. Crossfeed on a 172R? <img src="/discussions/graphics/smilies/eyebrow.gif" alt="eyebrow" border=0> You probably don't use it much 'caus it doesn't exist 57AZ <img src="/discussions/...

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liamksa

RE: The Ultimate Cessna 172 Trivia Thread

Sorry to bring this one back up the top... G'day 2H4 - thanks for the clarification. I'll try to explain where I was going wrong... Although i'm aware that a higher reading is desirable and will spin the gyros faster, I was getting confused as I was thinking the higher reading we get (eg: lets look ...

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liamksa

RE: The Ultimate Cessna 172 Trivia Thread

BMAbound and 2H4 - correct! What are the suction limits in the 172? I have a real question (not 172 specific) which hopefully someone will be able to answer (I don't know the answer)... If the vacuum gauge is indicating toward the lower end of the scale would that mean that due to the greater differ...

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liamksa

RE: The Ultimate Cessna 172 Trivia Thread

Regarding the 172R:

Without looking at the AFM...

1) What type of ailerons?

2) At what quantity will the "LOW FUEL" annunciators come on?

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liamksa

RE: Taxiway Turnoff Lights

G'day Theflcowboy Here you can see the runway turnoff lights mounted above the landing lights and angled to illuminate any taxiways coming off the runway. <center><a href="/open.file/349426/L/" target="_blank">View Large</a> <a href=...

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liamksa

RE: Carb Heat Vs Alternate Air

Many open automatically when the pressure in the intake drops beyond a predetermined value, others are manually activated. Just to expand a little.... In aircraft i'm familiar with the alternate air 'door' is usually spring-loaded to closed, and in the event that the intake becomes blocked th...

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liamksa

RE: A Technical Photo Database?

Great idea! I'm all for it.

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liamksa

Short, Rough, Steep, Curved And Remote Strips

I'd love to see some photos of runways / strips where it's only just possible for small aircraft to make it in. Along the lines of the strips you see in the Air America movie. Strips on the sides of mountains, on steep slopes, really short strips, strips surrounded by trees etc... You get the idea &...

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liamksa

RE: How Are Aircraft Cabins Cooled And Heated?

G'day Mozart I suspect you're most interested in airliners but I'll explain the unpressurised, light aircraft scenario. Cold air - simply open a vent and use the freestream air. Not much good therefore if you're slow (eg: taxi) or lower where the air may be too warm. Hot air - a shroud is fitted aro...

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liamksa

RE: Maximum Crosswind/tailwind

Max demonstrated C-182S 15kts.

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liamksa

RE: Pressure Alt. Vs. Density Alt.

The forumla I'm familiar with:

DA = PA + 120 * (ISA Deviation)

where...
DA = Density Altitude
PA = Pressure Altitude
ISA Deviation in degees C

This formula seems to fit closely with the 8 degrees / 1000 feet rule of thumb above.

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liamksa

RE: Diesel Diamond Star?!

I strongly believe diesel is the way of the future for <acronym title="Garuda Indonesia">GA</acronym> aircraft. Advances in technologies and materials have the brought the weight of the diesel engine down around its gasoline counterpart for a similar power / torque output, but for a much lower fuel ...

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liamksa

RE: VOR/DME Approach

Slamclick I don't know the US rules with respect to instrument approaches but i'd bet that the definitions of precision approach, NPA, <acronym title="Atlantic Coast Airlines (USA)">DH</acronym> and MDA are the same the world over. That being the case everything Ralgha has written is entirely accura...

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liamksa

RE: How Is MLW Determined In Light Aircraft?

Thanks for the replies.

Great info CitationJet.

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liamksa

How Is MLW Determined In Light Aircraft?

Pretty much as the title says - I was wondering how the maximum landing weight for light aircraft (read < 5700 kg / 12500 lb) is determined? For example the MLW for the C-182S is 150 lbs less than the MTOW - is this figure designed to protect the undercarriage in the event of a landing at the maximu...

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liamksa

RE: Generic Power Graph Question

G'day Lehpron I guess the intersection of the power required and power available curves on the left would denote the minimum level flight speed. Below this speed the power required is greater than the power available. This is a bit of a strange circumstance though because most aircraft are li...

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liamksa

RE: Generic Power Graph Question

The speed for maximum range is found by the tangent to the power required curve drawn from the origin. This gives the minimum ratio for power required to airspeed. The intersection on the right in this graph gives the maximum level flight speed (ie: where the power available = power required). The s...

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liamksa

RE: Photos On Pilot Certificates Coming Soon!

Our flight crew licenses are getting the same treatment.

http://www.casa.gov.au/avreg/fcl_lic/photo/index.htm

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liamksa

RE: Jet Lag

It's very real. It's related to delaying and advancing your 'body clock'. Have you ever noticed travelling west is much easier than east? The body finds it far easier to delay than advance its circadian rhythms (which IIRC is related to body core temperature). The phenomenon is similar to what peopl...

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liamksa

RE: TAS And IAS Changes With Altitude.

1. Decrease. Remember Lift = Coefficient of Lift * [1/2 * rho * V squared] * S <LI>Coefficient of Lift is related to the wing's AoA, flap settings, its actual design etc...</LI> <LI>[1/2 * rho * V squared] is the dynamic pressure sensed at the pitot tube (or IAS),where rho = air density, V = true ai...

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liamksa

RE: 737-300 Vs 737-700 NG, How Can You Tell?

Does anyone know why the larger tail on the -700?

I was thinking along the Vmc lines (like the 747SP) but I had a quick look on the airliners stats page and the -300 and -700 are about the same length and have similar thrust outputs...

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liamksa

RE: Flying Through Bad Weather? And Why?

For interest's sake a couple of definitions form the Aussie docs: Moderate Turbulence. There may be moderate changes in aircraft attitude and/or altitude, but the aircraft remains under positive control at all times - usually, small variations in air speed - changes in accelerometer readings ...

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liamksa

RE: When To Retract Flaps During Landing Run?

G'day Bragi I was wondering if it's done soon after touchdown to improve braking action, or is it done later to use the drag the flaps provide to slow down the aircraft? On the big jets you get the best of both worlds. On touchdown you may have noticed the ground spoilers on top of the wing d...

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liamksa

RE: What Is The Most Robust Aircraft?

In terms of 'robustness' my vote would definitely go to older aircraft such as the DC-3. Modern aircraft are designed using modern methods which results in a structure which is right on the limit of what the regulations require. In the olden days structural and material anaylses weren't nearly as pr...

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liamksa

RE: What Aircraft Would You Most Like To Fly?

Agree this is Polls & Prefs, but for me:

- DA-42 (test run these new diesels)

- Connie

- Global Express

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liamksa

RE: Idling On The Tarmac

And just to confirm you're referring to an idling engine as opposed to a windmilling engine?

The combination of an operating APU and windmilling engine could give the wrong impression.

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liamksa

RE: The Future Of Diesel Engines...looks Bright

The Centurions which power the DA-42 don't actually have a TBO they have a TBR - Time Between Replacement. It's currently at 1000 hrs but they're targeting 2400. From the sounds of it the DA-42 is an awesome aircraft - about time <acronym title="Garuda Indonesia">GA</acronym> to...

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liamksa

RE: Runways Why The Names

It's also interesting to note that some runways don't actually represent their magnetic heading to the nearest 10 degrees (ie: + / - 5) For example at YSSY the magnetic heading of runway 07 is actually 062 degrees (which you would think would be called runway 06). However there's also a 16-34 runway...

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liamksa

RE: Markings At Australian Airports

G'day Both of the photos actually have a T-VASIS installed as opposed to a PAPI system. The four horizontal dots aren't PAPI - they mark the midpoint of the T-VASIS system. When dots are visible above the line you're too high and when dots are visible below the line you're too low. No dots visible a...

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liamksa

RE: Wake Turbulence Question

When I was working toward my PPL, my instructor and I were doing the required "turns about a point" on a perfectly calm day and I got around and hit my own wake. A C-172, so no big deal, but still a bump. Same thing happens with a loop - a little buffet on the exit. Easy way to tell you've na...

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liamksa

RE: Why Do Pilots Or Avionice Depend On UTC Time?

0.9 (9/10) minutes? I.e. 90 seconds? Maybe? I think you'll find 0.9 of a minute is 54 seconds. <img src="/discussions/graphics/biggthumpup.gif" ALT="Big thumbs up"> We know what you're getting at and that would be my guess also! <img src="/discussions/graphics/giggles.gif" ALT="La...

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liamksa

RE: Does GPS Take Altitude Into Account For Distance?

G'day Vorticity From the ICAO document titled “GUIDANCE MANUAL <acronym title="Fortaleza - Pinto Martins (FOR / SBFZ), Brazil">FOR</acronym> THE TRAINING <acronym title="Transports et Travaux Aériens de Madagascar">OF</acronym> HUMAN RESOURCES <acronym title="Air Nauru">ON</acronym> THE <acronym tit...

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liamksa

RE: Why Do Pilots Or Avionice Depend On UTC Time?

Simply so that everyone is working off the same reference. If communications, flight plans or whatever used local standard times it would simpy get too messy.

UTC keeps everyone on the same page to avoid confusion.

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liamksa

RE: Does GPS Take Altitude Into Account For Distance?

When only 4 satellites are in view (need 5 for RAIM), some GPS systems use the pressure altitude from the txpdr (or an approved altimeter) as the 5th 'distance measurement'.

It's called barometric aiding but using all satellites is preferred.

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liamksa

RE: Aircraft Flutter

There's a few interesting videos here ( <a href="http://www.airspacemag.com/ASM/Mag/Supp/FM01/Hammer.html" target=_blank>http://www.airspacemag.com/ASM/Mag/Supp/FM01/Hammer.html</a> ) which demonstrate flutter. <center><a href="/open...

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liamksa

RE: Aviation Terminology - Help!

There's a decent list of TLA's ( ) here in a past thread

https://www.airliners.net/discussions/tech_ops/read.main/56214/

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liamksa

RE: What's The Difference?

G'day Tangoecho QNH is the pressure at sea level whereas QFE is the pressure which is set on the altimeter's subscale to give a 'zero' reading at some point above the ground (eg: at an aerodrome). So if you set QFE at an aerodrom (rather than the QNH) your altimeter will read height above the aerodr...

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liamksa

RE: Propeller Commuter Airliner Startup And Shutdown

A feathered prop has less drag in-flight (ie: with forward airspeed) but more drag on startup. When starting a feathered prop the blades are 'slapping' the air rather than 'slicing' through it - more drag (resistance). For this reason direct drive turboprops (which must swing the prop ...

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liamksa

RE: The IFE System

I've heard the figure of 4 kgs per seat for the IFE system. Does anyone know if this is an accurate number?

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liamksa

RE: ATR 42/72 Startup

The ATR's have a prop brake which allows the gas generator to be running without spinning the prop (Hotel mode), supplying both bleed air and power.

Nifty little feature which is AFAIK only available on the ATR's - handy when there's no APU or ground power.

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liamksa

RE: GPS/Ground Speed Question

As Fred mentions, GPS gives altitude above a reference level. In the case of GPS (ie: the US global satellite navigation system), the reference is World Geodetic System (WGS) 84. This describes an imaginery ellipse around the earth which approximately resembles the shape of the earth. GLONASS (the R...

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