Search found 1336 matches

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by kitplane01
Sun Aug 04, 2019 6:26 am
Forum: Technical/Operations
Topic: High pressure hydraulics vs bleed air
Replies: 15
Views: 2055

Re: High pressure hydraulics vs bleed air

We always talk about how the bleed air we use is VERY high pressure, but it’s nothing compared to the 3,000 psi hydraulic systems. Would it be possible to have a pneumatic system that is pressurized to 3,000 like the hydraulics. I assume there wouldn’t be any benefits and there’s no way engines cou...

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by kitplane01
Sun Aug 04, 2019 6:12 am
Forum: Civil Aviation
Topic: Updated: Airbus plans to open new A321neo assembly line in Toulouse
Replies: 73
Views: 1898

Re: Airbus studying an A321neo line in Toulouse

Glad Airbus managed to get the german unions to go onboard the project. This was for long the main barrier to get an A321 FAL in TLS Great news ! it's the French union supporting it, I'm sure the Germany unions have high reservations to say the least Can you all tell me how much influence the Frenc...

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by kitplane01
Thu Jul 25, 2019 7:23 am
Forum: Technical/Operations
Topic: Benefits of a 2 blade rotor
Replies: 15
Views: 3312

Re: Benefits of a 2 blade rotor

vikkyvik wrote:
I don't know this for a fact, but I would think that more blades also allows a lower rotor RPM, which might allow a faster helicopter speed, as the receding blades will suffer a decreased loss of lift.


That's backwards. Lower RPM makes the retreating blade stall problem worse, not better.

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by kitplane01
Fri Jul 19, 2019 7:23 am
Forum: Technical/Operations
Topic: Benefits of a 2 blade rotor
Replies: 15
Views: 3312

Re: Benefits of a 2 blade rotor

For storage, especially on a carrier, 2 blades have some advantage as well. Else you need a folding blade - which has of course been done, but adds complexity and hence weight. Rotor inertia is NOT about weight. It is about weight distribution. A solid disk that is 1 inch thick and 12 inches diamet...

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by kitplane01
Wed Jul 17, 2019 4:27 am
Forum: Technical/Operations
Topic: GE9X Record Breaker
Replies: 60
Views: 9783

Re: GE9X Record Breaker

I don't think that makes sense. If you have extra thrust for the emergency, then your take-off and go-around calculations would allow for a shorter runway and better climb-out. There are flights where this would allow extra payload/range. Another consideration: If the 777X, for example, wanted its ...

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by kitplane01
Sun Jul 14, 2019 7:39 am
Forum: Technical/Operations
Topic: Retread Tires on Commercial Planes
Replies: 22
Views: 2228

Re: Retread Tires on Commercial Planes

Actually, brakes are the number one mtx expense, so I hear. Used tires get re-capped all the time, it's perfectly safe. The tire company determines if the tire can be re-capped. It's marked on the side. The max number of re-caps is 6 I believe. You can always tell if a new wheel off the rack has ne...

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by kitplane01
Sun Jul 14, 2019 7:02 am
Forum: Technical/Operations
Topic: GE9X Record Breaker
Replies: 60
Views: 9783

Re: GE9X Record Breaker

If the engine can clearly produce more than rated thrust .... why is that not allowed during emergencies? Example: If some particular flight is weight limited because of engine-out concerns, and the engine had an extra bit of thrust just for emergencies, then one could increase weight. (Assuming en...

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by kitplane01
Sun Jul 14, 2019 6:58 am
Forum: Technical/Operations
Topic: GE9X Record Breaker
Replies: 60
Views: 9783

Re: GE9X Record Breaker

If the engine can clearly produce more than rated thrust .... why is that not allowed during emergencies? Example: If some particular flight is weight limited because of engine-out concerns, and the engine had an extra bit of thrust just for emergencies, then one could increase weight. (Assuming en...

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by kitplane01
Sun Jul 14, 2019 5:54 am
Forum: Technical/Operations
Topic: GE9X Record Breaker
Replies: 60
Views: 9783

Re: GE9X Record Breaker

If the engine can clearly produce more than rated thrust .... why is that not allowed during emergencies? Example: If some particular flight is weight limited because of engine-out concerns, and the engine had an extra bit of thrust just for emergencies, then one could increase weight. (Assuming eno...

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by kitplane01
Sun Jul 14, 2019 5:51 am
Forum: Technical/Operations
Topic: GE9X Record Breaker
Replies: 60
Views: 9783

Re: GE9X Record Breaker

Cold weather, alone, allows for quite a bit more thrust than, for example, a hot day takeoff. I'm not sure what precise values are used for a rating, but keep in mind that the rated thrust is not what the average engine makes. Every single engine in the fleet, worn or not, should be capable of exce...

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by kitplane01
Sun Jul 14, 2019 5:47 am
Forum: Technical/Operations
Topic: GE9X Record Breaker
Replies: 60
Views: 9783

Re: GE9X Record Breaker

Then how was the 127,000lbs figure achieved during GE90 testing? Triple red line testing of the engine in a test bed with a potentially sacrificial SETT (second engine to test - after certification this will be the reference design). GE Aviation ran the GE90-115B ran for approximately 60 hours at t...

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by kitplane01
Sun Jul 14, 2019 5:44 am
Forum: Technical/Operations
Topic: GE9X Record Breaker
Replies: 60
Views: 9783

Re: GE9X Record Breaker

They certainly could easily do it except bragging rights have no place in something as conservative as aviation. I gotta say you're missing some significant history, which is full of flights for bragging rights. If you want the most recent example, https://www.cnn.com/travel/article/speed-record-ci...

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by kitplane01
Fri Jul 12, 2019 4:15 am
Forum: Civil Aviation
Topic: Poland's proposed new mega airport CPK reveals competing design concepts
Replies: 68
Views: 9326

Re: Poland's proposed new mega airport CPK reveals competing design concepts

The best airport I have ever connected in is Atlanta. Airports don't necessarily need to be pretty, they just need to be functional and intuitive. Detroit, as far as I am concerned. You can't get more simple and more efficient than that: one looooooong terminal building with gates all along on both...

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by kitplane01
Fri Jul 12, 2019 4:12 am
Forum: Technical/Operations
Topic: Captains admonishing FO's for using speed brake on descent
Replies: 51
Views: 7579

Re: Captains admonishing FO's for using speed brake on descent

rjsampson, your thread turned out to be quite an interesting discussion on the use of speedbrakes, but also an exercise in Shakespearian literature--"much ado about nothing." gee, I never knew simply extending the speedbrake was such a complex process. Simply put, aircraft manufacturers p...

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by kitplane01
Wed Jul 10, 2019 6:52 am
Forum: Civil Aviation
Topic: Airbus product range 2028
Replies: 62
Views: 7078

Re: Airbus product range 2028

A360 This will be Airbus next clean sheet design and a replacement for the 767/A330. Spacious 8-abreast, 5.5m wide, LD3 capable. Will have very low induced drag due to very low spanwise loading due to state of the art very high AR wing. Competes with NMA, will have a small CSAM penalty but will be ...

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by kitplane01
Wed Jul 10, 2019 6:47 am
Forum: Civil Aviation
Topic: Airbus product range 2028
Replies: 62
Views: 7078

Re: Airbus product range 2028

also i think a300 cross section inferior to 787. so, take close to 787 or to lesser 767+-style and ld3/45 AFAIK 2-4-2 is a very comfortable long range economy arrangement. Far superior to the 3-3-3 seating. It's only having to pass at most one passenger to enter the aisle. I don't believe airliners...

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by kitplane01
Wed Jul 10, 2019 6:44 am
Forum: Civil Aviation
Topic: Airbus product range 2028
Replies: 62
Views: 7078

Re: Airbus product range 2028

A220-500 - Mmmmmaybe. I think it's more likely that Airbus will still be production constrained on the A220 and can sell every A220 it can build with just the -300 in the lineup. (I don't think the -100 will survive for long.) Why would Airbus be production constrained 9 years in the future? I woul...

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by kitplane01
Tue Jul 09, 2019 2:56 am
Forum: Civil Aviation
Topic: New Airbus and Boeing Market Forecasts
Replies: 29
Views: 3156

Re: New Airbus and Boeing Market Forecasts

They have always underpredicted demand over 20 years. They never hold for sizing. The early market outlooks missed the RJ boom and plummet in small turboprops. Airbus missed market fragmentation to the degree it occurred. I'm very interested. How much have they been under predicting demand? Can you...

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by kitplane01
Mon Jul 08, 2019 7:57 am
Forum: Civil Aviation
Topic: New Airbus and Boeing Market Forecasts
Replies: 29
Views: 3156

Re: New Airbus and Boeing Market Forecasts

I believe that in the past both Boeing and Airbus had a category for VLAs, and it was 747s and A380s. Both companies have learned that they cannot sell such planes. They no longer offer such planes. That's what's changed. If your point is that the market forecasts for VLAs from the past were wrong,...

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by kitplane01
Mon Jul 08, 2019 7:05 am
Forum: Civil Aviation
Topic: New Airbus and Boeing Market Forecasts
Replies: 29
Views: 3156

Re: New Airbus and Boeing Market Forecasts

Where have all the VLAs gone? Neither manufacturer seems very upbeat about VLAs, and for good reasons. They've both been bitten. That said, the 'Freighter widebody' category Boeing mentions likely includes the 747, so there you go. Correct, but it does not change the fact there have been a lot of V...

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by kitplane01
Mon Jul 08, 2019 5:41 am
Forum: Technical/Operations
Topic: Captains admonishing FO's for using speed brake on descent
Replies: 51
Views: 7579

Re: Captains admonishing FO's for using speed brake on descent

If you need to use the brake, use the brake. If you don’t, you don’t. However, There is the sense of satisfaction though if you can get from cruise to final with thrust at idle the from top of descent until final configuration just before landing. But these days with controllers giving instructions...

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by kitplane01
Mon Jul 08, 2019 5:36 am
Forum: Civil Aviation
Topic: New Airbus and Boeing Market Forecasts
Replies: 29
Views: 3156

Re: New Airbus and Boeing Market Forecasts

VV wrote:
Where have all the VLAs gone?

Aren't airports congested anymore?


Funny!

Airbus no longer has a category "VLA". Please don't turn this into an A380 thread!

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by kitplane01
Mon Jul 08, 2019 5:35 am
Forum: Civil Aviation
Topic: New Airbus and Boeing Market Forecasts
Replies: 29
Views: 3156

Re: New Airbus and Boeing Market Forecasts

The biggest difference is in widebodies. 5000 frames difference, I wonder if this is due to the MoM. Airbus is being weird. Their "medium" category includes the 321LR (but not the 321) and the 330 and probably the new NMA. Boeing (and everyone else) would include the 330 and the NMA into ...

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by kitplane01
Mon Jul 08, 2019 3:29 am
Forum: Civil Aviation
Topic: New Airbus and Boeing Market Forecasts
Replies: 29
Views: 3156

New Airbus and Boeing Market Forecasts

Airbus forecasts Narrow Body (including A220): 28,500 Medium: (includes A321LR and A330): 5,500 Wide Body (includes 787?): 3,300 Total: 37,000+ Boeing forecast: 90 seats and below 2,240 aircraft 90 seats and above: 32,420 aircraft Widebody: 8,340 aircraft Freighter widebody: 1,040 aircraft Total exc...

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by kitplane01
Mon Jul 01, 2019 6:53 am
Forum: Technical/Operations
Topic: Weight cost of pressurised cabin
Replies: 12
Views: 3195

Re: Weight cost of pressurised cabin

I wonder why the new carbon fiber airplanes are not certified to go up to 52,000 feet like some of the private jets? Is it really that much more difficult to go 6-7000 ft higher? That high you are in the troposphere where there is a constant temp. So, you really don't gain anything by climbing that...

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by kitplane01
Mon Jul 01, 2019 6:43 am
Forum: Technical/Operations
Topic: Falcon business jet horizontal designs - what are the advantages?
Replies: 10
Views: 2223

Re: Falcon business jet horizontal designs - what are the advantages?

There is no blue line on a Part 25 plane. My bad. What does a part 25 plane call the minimum speed one can fly with the worst engine out and maintain directional control? It’s not a “worse” Vmcg, it’s just not optimum for its wing. The take-off minimum V1 is restricted by Vmcg where it could lift o...

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by kitplane01
Sat Jun 29, 2019 4:41 am
Forum: Technical/Operations
Topic: Big engines planes (2030+) - how will look like?
Replies: 21
Views: 6065

Re: Big engines planes (2030+) - how will look like?

Can some one explain the difference between an UnDucted Fan, and a Turboprop? Or between a Ducted fan and a Geared Turbofan? To the lay person, those “technologies” are very similar, it almost seams like a way to make a turbo prop, without calling it a propeller airplane. It's a matter of degree. I...

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by kitplane01
Sat Jun 29, 2019 4:36 am
Forum: Technical/Operations
Topic: Falcon business jet horizontal designs - what are the advantages?
Replies: 10
Views: 2223

Re: Falcon business jet horizontal designs - what are the advantages?

The rudder is small and Vmcg on Falcons is high enough they can’t get all the advantages of their wing for take-off performance. I think we're talking about the Falcon 7x/8x. I'd like to learn more about this. Since it's three-engined, asymmetric thrust is relatively less than a twin. If they want ...

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by kitplane01
Sat Jun 29, 2019 2:40 am
Forum: Civil Aviation
Topic: Cape air to order and be launch customer of all-electric aircraft
Replies: 84
Views: 9667

Re: Cape air to order and be launch customer of all-electric aircraft

Given that Tesla vehicles catch on fire in what seems to be a monthly basis, this is a recipe for disaster. https://www.youtube.com/watch?v=TE9b_EC874g I wonder if Cape officials approached Piper about a replacement for their Cessna aircraft. You must be aware that cars with flammable liquids also ...

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by kitplane01
Wed Jun 26, 2019 4:37 am
Forum: Civil Aviation
Topic: Flying Magazine - Tecnam P2012
Replies: 21
Views: 2165

Re: Flying Magazine - Tecnam P2012

According to each manufacturer (Fuel Cost based on prices per AirNav website as of today, KFFC Airport which seems to be in the average price nationwide, discount included as applicable): - EV-55 Fuel Capacity: 1,656 kg => 2,060 L (density: 0.804 for Jet A-1), 545 Gallons; Cost of a Refuel: $2,545,...

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by kitplane01
Sun Jun 16, 2019 3:29 am
Forum: Technical/Operations
Topic: Landing fees in special cases
Replies: 13
Views: 2028

Re: Landing fees in special cases

- Go-around, flying the pattern and complete a successful landing on your second attempt: one or two fees? - Same as above, but with runway contact (balked landing) - Approach and go-around at airport A, then divert to airport B: where is the fee due? Only at B or also at A? - Touch-and-go's for tr...

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by kitplane01
Wed Jun 12, 2019 3:52 am
Forum: Civil Aviation
Topic: FedEx 757’s
Replies: 42
Views: 6561

Re: FedEx 757’s

Then we run in to the issue that we have yet to see a plane with CFRP floor beams successfully converted to a freighter, and NMA will be an extra challenge with its ovoid design with beams in tension rather than compression. Just wondering of you have that backwards. In a circle with interior posit...

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by kitplane01
Tue Jun 11, 2019 3:47 pm
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

See, that is a discussion we can have. It is a reasonable question to ask, without having to resort to a misleading artificial "wage gap" figure, which is being hyped up to distract from the fact that such a thing does not actually exist. Is "Why do women who work for British Airways...

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by kitplane01
Tue Jun 11, 2019 9:12 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

We agree. Now why are women the caregivers and men the bread earners? Who made that rule (and enforces it in 2019)? See, that is a discussion we can have. It is a reasonable question to ask, without having to resort to a misleading artificial "wage gap" figure, which is being hyped up to ...

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by kitplane01
Tue Jun 11, 2019 9:04 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

The "standard definition" of the wage gap is dishonest and stupid and only used by ideologues or weak people muzzled into obedience by them. American Airlines writes "The gender pay gap is the difference between the average hourly pay of women and men working in an organisation. It i...

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by kitplane01
Tue Jun 11, 2019 8:55 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

From my first hand impressions, which are limited: it comes down to children. This study has a chart entitled "Women's earning drop significantly after having a child. Men's don't." Makes you wonder why. And I don't think the whole answer can be parental leave, which is often taken by bot...

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by kitplane01
Tue Jun 11, 2019 8:54 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

Do male BA captains who fly say 900 hours a year and have 5000 hours of experience get paid more than female BA captains who fly 900 hours a year and have 5000 hours of experience? Do male BA flight attendants who fly say 900 hours a year and have 3 years of experience get paid more female BA fligh...

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by kitplane01
Tue Jun 11, 2019 8:50 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

Not matter how you massage those numbers, it is and remains a fake narrative. The term "gender pay gap" and the ubiquitous virtue-signalling media frenzy which accompanies it implies that women are paid less for the same job . This simply is not true, and has not been for many decades - a...

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by kitplane01
Tue Jun 11, 2019 8:43 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

First, that's not the standard definition of "wage gap". The "standard definition" of the wage gap is dishonest and stupid and only used by ideologues or weak people muzzled into obedience by them. American Airlines writes "The gender pay gap is the difference between the a...

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by kitplane01
Tue Jun 11, 2019 8:32 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

Do male BA captains who fly say 900 hours a year and have 5000 hours of experience get paid more than female BA captains who fly 900 hours a year and have 5000 hours of experience? Do male BA flight attendants who fly say 900 hours a year and have 3 years of experience get paid more female BA fligh...

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by kitplane01
Tue Jun 11, 2019 8:28 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

From my first hand impressions, which are limited: it comes down to children. This study has a chart entitled "Women's earning drop significantly after having a child. Men's don't." Makes you wonder why. And I don't think the whole answer can be parental leave, which is often taken by bot...

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by kitplane01
Tue Jun 11, 2019 8:15 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

Well even then he'd be wrong. Anyone who seriously believes there is a wage gap in the double digits has lost their marbles. I'm going to guess you like Fox News. "In the U.S., the pay gap between men and women is 21.4 percent, meaning that women earn, on average, about $0.79 for every $1 a ma...

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by kitplane01
Tue Jun 11, 2019 7:20 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

I'm just correcting your error. What you’re doing is what we in reality call semantic bullshitting. Meanwhile outside the borders of lala Land: https://scholar.harvard.edu/bolotnyy/publications/why-do-women-earn-less-men-evidence-bus-and-train-operators-job-market-paper Whoops. You wrote "Anyo...

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by kitplane01
Tue Jun 11, 2019 7:16 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

aviationaware wrote:

Discussing a wage gap only makes sense if you look at the same position, same experience, same company. Period.


That's false. For example, one could have a sensical conversation about why higher paying jobs have more men than women (pilots, upper management).

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by kitplane01
Tue Jun 11, 2019 7:14 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Re: Gender Wage Gap in Airlines

You can make as many new topics as you’d like. It doesn’t change the fact that the assumptions behind the wage gap are dishonest and misleading. There is no more positive way to put it. Absolute rock bottom. Of course airlines have huge wage gaps if you don’t account for any factors. Most pilots ar...

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by kitplane01
Tue Jun 11, 2019 6:16 am
Forum: Non-Aviation
Topic: Gender Wage Gap in Airlines
Replies: 48
Views: 2012

Gender Wage Gap in Airlines

I don't think that statistic was specifically for flight attendants but a comparison of wages between men and women across all professional fields. Well even then he'd be wrong. Anyone who seriously believes there is a wage gap in the double digits has lost their marbles. I'm going to guess you lik...

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by kitplane01
Tue Jun 11, 2019 5:48 am
Forum: Civil Aviation
Topic: Tecnam P2012 vs Cessna Caravan vs Cessna Skycatcher vs Twin Otter
Replies: 79
Views: 8008

Re: Tecnam P2012 vs Cessna Caravan vs Cessna Skycatcher vs Twin Otter

I suspect that FedEX already went thru the choices and went with the SkyCourier which seems to be specifically designed for short distance freight - 3 LD3's is a lot of cube for 6,000 lb payload. I think it's more accurate to say that FedEX went to Cessna and told them exactly what their requiremen...

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by kitplane01
Tue Jun 11, 2019 1:09 am
Forum: Civil Aviation
Topic: Tecnam P2012 vs Cessna Caravan vs Cessna Skycatcher vs Twin Otter
Replies: 79
Views: 8008

Re: Tecam P2012 vs Cessna Caravan vs Cessna Skycatcher vs Twin Otter

What about the British one, the Shorts? I think that is awesome for freight. Shorts 360 production ceased in 1991. At most there's only about 45-50 still operating. I don't think this is really relevant to this conversation. Interesting that the first aircraft actually built as a SH360 (N360SA) has...

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by kitplane01
Mon Jun 10, 2019 8:46 pm
Forum: Civil Aviation
Topic: Tecnam P2012 vs Cessna Caravan vs Cessna Skycatcher vs Twin Otter
Replies: 79
Views: 8008

Re: Tecam P2012 vs Cessna Caravan vs Cessna Skycatcher vs Twin Otter

Any reason why the Pilatus PC-12 was excluded? It can get up to 9 pax. Or King Air 350... Any reason why the Pilatus PC-12 was excluded? It can get up to 9 pax. I don't think their in the same market (but I'm willing to be educated). I think both those planes are more executive travel (business jet...

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by kitplane01
Mon Jun 10, 2019 8:16 pm
Forum: Civil Aviation
Topic: Tecnam P2012 vs Cessna Caravan vs Cessna Skycatcher vs Twin Otter
Replies: 79
Views: 8008

Re: Tecam P2012 vs Cessna Caravan vs Cessna Skycatcher vs Twin Otter

Because you didn’t read it carefully... I said we ran them on 100LL which is avgas. Something that is approved on the Rotax 912 (apparently). I also said that because we couldn’t get Mogas (most airports don’t have it because nothing conventional runs on it). Tecnam had a habit of listing approvals...

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