Search found 624 matches

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by kitplane01
Fri Sep 21, 2018 1:38 am
Forum: Technical/Operations
Topic: What is the most economical GA aircraft??????
Replies: 8
Views: 1332

Re: What is the most economical GA aircraft??????

Hi I am looking for an economical 6 seat or high useful load 4 seat aircraft after full tanks. Something not more 150k CAD but up to 200k CAD is fine but not preferred. Also just single engine aircraft. It's mission will be cross country recreation and carrying camping supplies also I live in a mou...

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by kitplane01
Fri Sep 21, 2018 1:35 am
Forum: Technical/Operations
Topic: Engine over the fuselage question
Replies: 28
Views: 2046

Re: Engine over the fuselage question

> The Hondajet is an example of over the wing. No other business jet does this. The Scaled Composites Triumph also had an over-the-wing engine installation. It was also the first airplane to fly with FJ44 engines. I did the aero design of the nacelle installation and will say that it wasn't easy. 1...

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by kitplane01
Thu Sep 13, 2018 2:40 am
Forum: Technical/Operations
Topic: Power by the Hour
Replies: 1
Views: 801

Power by the Hour

Most older business jets have engines maintained by their owners. But newer business jets are often on power-by-the-hour. A clear example is this: older Citations powered by Pratt engines are normally owner maintained, but newer Citations powered by Williams are almost always power by the hour. Only...

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by kitplane01
Thu Sep 13, 2018 2:33 am
Forum: Technical/Operations
Topic: Engine over the fuselage question
Replies: 28
Views: 2046

Re: Engine over the fusulage

BTW ignoring all the other arguments for wing mounted engines, mounting well behind the center of gravity, e.g. MD-80, is just fine, as long as you also move the center of lift back. Which is why the MD-80 wings are mounted relatively much further back compared to, say, the 737 wings. 2090945,43842...

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by kitplane01
Wed Sep 12, 2018 5:28 am
Forum: Technical/Operations
Topic: Engine over the fuselage question
Replies: 28
Views: 2046

Re: Engine over the fusulage

Hei all, This is maybe a noob question for many of you but I am not an engineers.... and I failed to find the reply by research function. The engine are normallly located near the centre or gravity due to structural reason + (if I am not wrong) it's easier for fuel intake system and some how better...

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by kitplane01
Wed Sep 12, 2018 5:19 am
Forum: Civil Aviation
Topic: Singapore’s Sovereign Wealth Fund interested in purchasing GECAS
Replies: 14
Views: 2109

Re: Singapore’s Sovereign Wealth Fund interested in purchasing GECAS

Singapore’s sovereign wealth fund has expressed interest in buying General Electric Co.’s plane-leasing unit, said people with knowledge of the matter. At a meeting between GIC Pte. and GE officials, fund executives asked whether the Boston-based company would consider selling all or a part of GE C...

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by kitplane01
Sun Sep 02, 2018 12:32 am
Forum: Technical/Operations
Topic: Jet Liner Control System Failures??
Replies: 16
Views: 1585

Jet Liner Control System Failures??

Have their ever been any computer control system failures so bad they had to go to alternate law or direct law in the modern jet age? I know about the DC-10 (United 232) that had hydraulic control system failure, and about 737 rudder issues. That's not what I'm asking. I'm asking about failures of h...

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by kitplane01
Sat Sep 01, 2018 4:33 am
Forum: Technical/Operations
Topic: Need help researching aircraft with short runway requirements, and airport environmental laws
Replies: 47
Views: 2051

Re: Need help researching aircraft with short runway requirements, and airport environmental laws

1200 meters if fine for small propeller aircraft with a reasonable pilot on a reasonable day. I've never heard of an airliner operating into a 1200 meter runway. Maybe someone does somewhere, but it's quite rare.

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by kitplane01
Sat Sep 01, 2018 4:30 am
Forum: Technical/Operations
Topic: Why Anhedral with fly by wire?
Replies: 23
Views: 1386

Re: Why Anhedral with fly by wire?

I think everything you wrote is true for non-fly-by-wire aircraft. But in the fly-by-wire world, one can counter undesired rolling moments from a slideslip using programmed movement of the ailerons. The human need never know anything is going on. A different poster suggested that flyability conside...

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by kitplane01
Fri Aug 31, 2018 4:33 am
Forum: Technical/Operations
Topic: Why Anhedral with fly by wire?
Replies: 23
Views: 1386

Re: Why Anhedral with fly by wire?

I have been assuming that the anhedral of high wing aircraft is due to gravity. In flight, due to lift, the wings are level. With low wing aircraft this is not possible due to ground clearance. Is that assumption far from reality? That is not at all the reason for anhedral and dihedral. The wings o...

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by kitplane01
Fri Aug 31, 2018 4:29 am
Forum: Technical/Operations
Topic: Why Anhedral with fly by wire?
Replies: 23
Views: 1386

Re: Why Anhedral with fly by wire?

Or you can have the great F4 with dihedral on the wing and anhedral on the horizontal stabilizer I That was done to keep the tail out of the wake of the main wing at various angles of attack. It's a reasonable reason to have andedral for some planes. Other planes just use a T-tail, or other arragme...

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by kitplane01
Fri Aug 31, 2018 4:27 am
Forum: Technical/Operations
Topic: Why Anhedral with fly by wire?
Replies: 23
Views: 1386

Re: Why Anhedral with fly by wire?

The normal reason to have anhedral angle is for better stability Are you sure? Acc. Wiki dihedral would be much more stable. So anhedral on high mounted aircraft is done for increasing maneuverability. You're right. I was trying to be too cute with my words. By "better" I means "not ...

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by kitplane01
Fri Aug 31, 2018 4:25 am
Forum: Technical/Operations
Topic: Why Anhedral with fly by wire?
Replies: 23
Views: 1386

Re: Why Anhedral with fly by wire?

fr8mech wrote:
Just from a practical point-of-view, the aircraft you mention are military cargo aircraft. The high-wing is a result of the necessity to keep the fuselage as close to the ground to facilitate rapid load/unload.


I didn't ask why high wings. I asked why anhedral.

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by kitplane01
Fri Aug 31, 2018 4:24 am
Forum: Technical/Operations
Topic: Why Anhedral with fly by wire?
Replies: 23
Views: 1386

Re: Why Anhedral with fly by wire?

The loss of lift isn't very large ... There are two sources of inefficiency. (1) The wing lift vector is not vertical, which reduces lift and (2) the wing has to weigh more to have the same span. Unless you get some benefit, you wouldn't accept any inefficiency. Aerodynamic designers will kill thei...

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by kitplane01
Thu Aug 30, 2018 6:08 am
Forum: Technical/Operations
Topic: Why Anhedral with fly by wire?
Replies: 23
Views: 1386

Why Anhedral with fly by wire?

I notice that most high wing jet aircraft, even ones with fly by wire controls, have significant Anhedral (the wings droop), Look at a C-5, a C-17, and AN-124, etc. This causes a slight loss of lift, since the lift vector for each wing is not vertical. The normal reason to have anhedral angle is for...

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by kitplane01
Thu Aug 30, 2018 12:05 am
Forum: Technical/Operations
Topic: PT-6
Replies: 6
Views: 991

Re: PT-6

Where are PT-6 built? Could Canada build PT-6s by themselves, or are they dependent on significant imported parts? Can I ask what's the reason for that question? You want to go to war with the USA with a fleet of DHC-6 Twin Otters and thus be independent on part delivery from the South? :lol: Just ...

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by kitplane01
Tue Aug 28, 2018 11:08 pm
Forum: Technical/Operations
Topic: PT-6
Replies: 6
Views: 991

Re: PT-6

Where are PT-6 built? Could Canada build PT-6s by themselves, or are they dependent on significant imported parts? Pratt and Whitney Canada builds the PT6 series many parts are built by american companies though . It could be built solely in Canada but it's under a US Patent and thus could also be ...

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by kitplane01
Tue Aug 28, 2018 4:40 am
Forum: Civil Aviation
Topic: Air India Privatization, by June-Failed sale. What next?
Replies: 758
Views: 53698

Re: Air India Privatization, by June-Failed sale. What next?

I think what would help me most is if people made an explicit prediction what they think will happen. Not what they think ought to happen, but what they think will happen.

I always find that kind of thing clarifying.

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by kitplane01
Tue Aug 28, 2018 4:38 am
Forum: Technical/Operations
Topic: PT-6
Replies: 6
Views: 991

PT-6

Where are PT-6 built? Could Canada build PT-6s by themselves, or are they dependent on significant imported parts?

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by kitplane01
Fri Aug 24, 2018 8:32 am
Forum: Civil Aviation
Topic: BA drops Tehran from 23 September 2018
Replies: 140
Views: 11851

Re: BA drops Tehran from 23 September 2018

If humanity is to progress, certain mindsets must be eradicated using peaceful methods, one of which are economic sanctions. Iran is not compatible with the Western world and ideas of equality seem abstract to its citizens regardless of the social ladder. I hope the US will impose similar sanctions...

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by kitplane01
Fri Aug 24, 2018 8:17 am
Forum: Civil Aviation
Topic: BA drops Tehran from 23 September 2018
Replies: 140
Views: 11851

Re: BA drops Tehran from 23 September 2018

Great news. Shows sanctions are working. The west must continue to apply severe pressure to force the theocratic government to its knees and usher in the great Persian country that is modern and secular. Well said. However I don't understand why POTUS allows European carriers to operate to Iran. He...

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by kitplane01
Wed Aug 22, 2018 7:34 am
Forum: Civil Aviation
Topic: Worlds Busiest Air Routes
Replies: 7
Views: 3075

Re: Worlds Busiest Air Routes

This is way too vague to take anything from, without going to OAG for more research. E.g. what does "LA to San Francisco" even mean? LAX-SFO only? Or BUR/SNA/ONT/LGB-OAK/SJC count too? Also, from the look of it, this seems to be a measure of frequency instead of capacity. It is by frequen...

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by kitplane01
Wed Aug 22, 2018 3:50 am
Forum: Civil Aviation
Topic: Worlds Busiest Air Routes
Replies: 7
Views: 3075

Worlds Busiest Air Routes

World's busiest air routes, 2017. 1. Jeju to Seoul 2. Melbourne to Sydney 3. Mumbai to Delhi 4. Fukuoka to Tokyo 5. Rio de Janeiro to Sao Paulo 6. Sapporo to Tokyo 7. LA to San Francisco 8. Brisbane to Sydney 9. Cape Town to Johannesburg 10. Beijing to Shanghai https://twitter.com/spectatorindex/sta...

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by kitplane01
Tue Aug 21, 2018 5:53 am
Forum: Aviation Hobby
Topic: Where does flightradar24 get planned aircraft data from?
Replies: 8
Views: 2259

Re: Where does flightradar24 get planned aircraft data from?

Flightradar24 lists the registration of the aircraft that will be used on flights a few days from now for some airlines in NA and Europe. I believe this is one of the most powerful features of FR24, and regardless of how accurate it is (sometimes it's not, based on experience), it is a great featur...

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by kitplane01
Tue Aug 21, 2018 5:49 am
Forum: Civil Aviation
Topic: NCA to offload 747-400Fs, focus on 747-8F platform as part of restructuring plan
Replies: 3
Views: 1668

Re: NCA to offload 747-400Fs, focus on 747-8F platform as part of restructuring plan

Nippon Cargo Airlines on 17 August submitted plans to Japan’s Ministry of Land, Infrastructure, Transportation and Tourism (MLIT) that centers around consolidating the fleet and maintenance operations to a single platform based on the 747-8F. The detailed improvement plan was in response to a manda...

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by kitplane01
Fri Aug 17, 2018 7:34 am
Forum: Civil Aviation
Topic: Death of 747-400 Greatly Exaggerated
Replies: 129
Views: 19039

Re: Death of 747-400 Greatly Exaggerated

Precisely. BA have them for 6 more years. I’d imagine LHs stay around for a while too among others. It would be interesting to know where the last -400 will fly. With the way oil prices have gone in the last year or so BA and LH could well accelerate retirements. I can’t comment on other airlines b...

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by kitplane01
Wed Aug 15, 2018 10:03 pm
Forum: Civil Aviation
Topic: Southwest latest airline to restrict service, emotional support animals
Replies: 30
Views: 3821

Re: Southwest latest airline to restrict service, emotional support animals

Excluding service dogs (seeing eye dogs, rescue dogs, police/fire), everything should be a pet and charge $100 Lightsaber Are used to think that too. When I asked the guy in front of me at the hockey games why he brings his dog to a hockey game. His wife explained that he used to get angry all the ...

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by kitplane01
Mon Aug 13, 2018 3:59 am
Forum: Civil Aviation
Topic: Air India Privatization, by June-Failed sale. What next?
Replies: 758
Views: 53698

Re: Air India Privatization, by June-Failed sale. What next?

Air India is not going to just magically disappear! Not without significant "structural damage" that will make demonetisation look like a walk in the park. Air India's work force is about 1/70,000th that of the Indian workforce. Air India is about 1/700th of the total economy of India by ...

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by kitplane01
Mon Aug 13, 2018 3:50 am
Forum: Civil Aviation
Topic: Air India Privatization, by June-Failed sale. What next?
Replies: 758
Views: 53698

Re: Air India Privatization, by June-Failed sale. What next?

Prediction: The Indian government within the month will announce a plan to “revitalize” and “restore” Air India. It’s two main components will be a large pile of cash and a large pile of words. No real reforms will actually happen (but lots of words will be used). Air India will not be privatized b...

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by kitplane01
Sun Aug 12, 2018 5:55 pm
Forum: Civil Aviation
Topic: Air India Privatization, by June-Failed sale. What next?
Replies: 758
Views: 53698

Re: Air India Privatization, by June-Failed sale. What next?

Prediction: The Indian government within the month will announce a plan to “revitalize” and “restore” Air India. It’s two main components will be a large pile of cash and a large pile of words. No real reforms will actually happen (but lots of words will be used). Air India will not be privatized be...

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by kitplane01
Wed Aug 08, 2018 4:03 am
Forum: Civil Aviation
Topic: Air India Privatization, by June-Failed sale. What next?
Replies: 758
Views: 53698

Re: Air India Privatization, by June-Failed sale. What next?

@lightsaber I said $8B six days back in #616. The point you are missing is all debt is not equal. AV : WC is 50:50, so $4B:$4B 1) AV debt revenue generating frames @LIBOR + 0.25 - $3,4 Billion 2) AV debt non-rev frames @LIBOR + 0.25 - $600 Million 3) WC debt external commercial borrowing @5-8% ($1 ...

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by kitplane01
Sun Aug 05, 2018 6:15 am
Forum: Civil Aviation
Topic: Q400: the underrated aircraft type?
Replies: 107
Views: 13132

Re: Q400: the underrated aircraft type?

But it's just not the same plane. It's a 50% bigger plane with (probably) very few common parts. EDIT: even the different wing you'd mentioned previously is almost no different. It's just the standard wing of the 300 with a ~0.5 m plug at each wing root to move the engines outboard and increase the...

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by kitplane01
Sat Aug 04, 2018 8:49 am
Forum: Civil Aviation
Topic: Q400: the underrated aircraft type?
Replies: 107
Views: 13132

Re: Q400: the underrated aircraft type?

Did you know that the Q400 is about 50% bigger than the Q300. It does not share wings, fuselages, or engines. Really a different thing. The wing is very similar and developed directly from that of the 300, the fuselage is in essence just a stretch, and the engines are generally based on the same PW...

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by kitplane01
Sat Aug 04, 2018 2:38 am
Forum: Technical/Operations
Topic: Supersonic Business Jet Engines
Replies: 24
Views: 1932

Re: Supersonic Business Jet Engines

When it comes to atmospheric flight (not space flight) you have to have at least a unity of exhaust gas velocity if you want to travel at that speed and even then that's not a guarantee. So if the bypass air is moving at 550mph and the core air is moving at 700mph you could theoretically end up som...

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by kitplane01
Fri Aug 03, 2018 7:47 am
Forum: Civil Aviation
Topic: Reduction of 787 deferred production cost slows.
Replies: 288
Views: 20433

Re: Reduction of 787 deferred production cost slows.

There is a distinction between sunk costs that have been charged to the Profit and Loss account and those that merely moved from the bank account (asset) to the Deferred Production Costs account (asset). These "sunk costs" were never charged (expensed via the profit and loss) in previous ...

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by kitplane01
Fri Aug 03, 2018 7:30 am
Forum: Civil Aviation
Topic: Q400: the underrated aircraft type?
Replies: 107
Views: 13132

Re: Q400: the underrated aircraft type?

The Q400 is based on the old Dash-8 series which has been out of production for years. I have not flown the Q400, but I have taken dozens of Dash-8-100,200 and 300 flights and they all were inferior in noise and comfort compared to RJ's. What??? You flew a plane we're not talking about, didn't like...

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by kitplane01
Fri Aug 03, 2018 7:22 am
Forum: Civil Aviation
Topic: Air India Privatization, by June-Failed sale. What next?
Replies: 758
Views: 53698

Re: Air India Privatization, by June-Failed sale. What next?

If it is only 19,000 jobs, it is time to shut down AI. Please post your estimate on AI monthly losses. Lightsaber AI probably has $8B debt. $4B AV related, $4B WC related. Not the issue. The issue is, AI pays <4% interest on AV debt and 15% on WC debt. It will never be able to recover from the debt...

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by kitplane01
Fri Aug 03, 2018 7:13 am
Forum: Civil Aviation
Topic: Market Value for B777-200ER (GE90-94 )
Replies: 3
Views: 2039

Re: Market Value for B777-200ER (GE90-94 )

viewtopic.php?f=3&t=1399391&p=20599949&hilit=aircraft+values
-->

oozypal wrote:
Hello,

Someone tell me what would be the Market Value for GE90-94 engine (half-life) and is there a free credible website that shows such information?

Thank you


viewtopic.php?f=3&t=1399391&p=20599949&hilit=aircraft+values

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by kitplane01
Wed Aug 01, 2018 8:52 am
Forum: Civil Aviation
Topic: Air India Privatization, by June-Failed sale. What next?
Replies: 758
Views: 53698

Re: Air India Privatization, by June-Failed sale. What next?

IMO, Air India management in Delhi should continue doing what they are. Hard working team, doing their very best in the circumstances. They have been doing all the right things - inducting NEO's while phasing out the CEO's. The A319's are being slowly cycled out and replaced with A320/A321 aircraft...

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by kitplane01
Wed Aug 01, 2018 8:30 am
Forum: Technical/Operations
Topic: Supersonic Business Jet Engines
Replies: 24
Views: 1932

Re: Supersonic Business Jet Engines

Wouldn’t work, way too much drag even if you get the inlet velocity below M1.0 at the face with a very special inlet design. The exhaust velocity would be much too low. Supersonic flight is very dependent on inlet design recovering the pressure gradient and using it as thrust. Very rough explanatio...

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by kitplane01
Tue Jul 31, 2018 5:01 am
Forum: Technical/Operations
Topic: Supersonic Business Jet Engines
Replies: 24
Views: 1932

Re: Supersonic Business Jet Engines

Wouldn’t work, way too much drag even if you get the inlet velocity below M1.0 at the face with a very special inlet design. The exhaust velocity would be much too low. Supersonic flight is very dependent on inlet design recovering the pressure gradient and using it as thrust. Very rough explanatio...

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by kitplane01
Tue Jul 31, 2018 1:08 am
Forum: Civil Aviation
Topic: Reduction of 787 deferred production cost slows.
Replies: 288
Views: 20433

Re: Reduction of 787 deferred production cost slows.

It is strange how many Boeing fans you can have your cake and (eat) it. Yep, tastes great, and yet, there it still is. If the deferred cost is not cleaned up, the rest has to be booked as a loss. The whole deferred cost has been taken out as earnings, when you remove the deferred cost you have to l...

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by kitplane01
Tue Jul 31, 2018 1:04 am
Forum: Technical/Operations
Topic: Supersonic Business Jet Engines
Replies: 24
Views: 1932

Re: Supersonic Business Jet Engines

Wish I could got ask one of the Skunkworks guys but I can't. But consider this. This is the fuel TFSC for the GE F101-GE-102 engine (without afterburner): 0.562 lb/(lbf h) (dry thrust) and a max dry thrust of 17,390 lb And this is the same for the CFM56-7B18 (which was derived from the above): 0.5 ...

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by kitplane01
Mon Jul 30, 2018 8:31 pm
Forum: Technical/Operations
Topic: Supersonic Business Jet Engines
Replies: 24
Views: 1932

Supersonic Business Jet Engines

Suppose one were to take a normal modern business jet engine, and attempt to make a supersonic aircraft. I understand the bypass ratio is too high, and the fan is too large to be optimal for supersonic flight. But how bad is the penalty? How inefficient would this be compared to a purpose designed e...

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by kitplane01
Thu Jul 26, 2018 8:39 pm
Forum: Civil Aviation
Topic: Dua Lipa Criticizes United Flight Attendant on Twitter Over Response to Sister's Nut Allergy
Replies: 168
Views: 11371

Re: Dua Lipa Criticizes United Flight Attendant on Twitter Over Response to Sister's Nut Allergy

She is NOT one of the biggest pop stars at the moment. Nowhere near it in fact. Name a current female pop act with more streams than Dua Lipa, I'll wait. Are you seriously using streams to justify someone as "one of the biggest pop stars right now" ? Don't make me laugh. OMG (That means o...

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by kitplane01
Wed Oct 18, 2017 11:45 pm
Forum: Civil Aviation
Topic: US Carriers vs The World
Replies: 36
Views: 2860

Re: US Carriers vs The World

Service is the main area thay US airlines are deficient and its a mix of training/union/labor laws that make it easy for that area to slip and to hold accountable flight crew for the lack of service. I don't believe that US labor laws are holding back US airline service. In France/Germany/Brazil, f...

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by kitplane01
Tue Oct 17, 2017 11:35 pm
Forum: Civil Aviation
Topic: Airbus and Bombardier Announce CSeries Partnership
Replies: 1568
Views: 181050

Re: Breaking: Airbus and Bombardier Announce C Series Partnership

All of that is true, and has been true for a long time. But while the plane is selling great, has a huge backlog, and has no new competitors on the horizon is not typically when you make a new wing. "Has no new competitors on the horizon" : I count 2 or 3 direct clean sheet competitors on...

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