Search found 2539 matches

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by LH707330
Mon Dec 06, 2021 7:26 pm
Forum: Aviation Hobby
Topic: civilian aircraft what if
Replies: 41
Views: 7884

Re: civilian aircraft what if

Nope, I've done the Revell only, but I've heard good things about the Zvezda kit.

Pros:
1. The fans are better
2. The engines are supposedly easier to do well

Cons:
1. The WBF is too small and needs some filler
2. The Through-belly wing part forces you to assemble, then paint

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by LH707330
Sun Dec 05, 2021 7:57 pm
Forum: Aviation Hobby
Topic: civilian aircraft what if
Replies: 41
Views: 7884

Re: civilian aircraft what if

The NEO kit windows might work on the CEO model, from what I've read it's a totally different mold, so be careful and measure it first.

The Landor retrojet would look cool, I debated doing a KLM what-if 747-8i before doing a 400 instead.

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by LH707330
Sat Dec 04, 2021 1:45 am
Forum: Technical/Operations
Topic: Teal Color Inside A320neo Pratt & Whitney Engines
Replies: 26
Views: 4178

Re: Teal Color Inside A320neo Pratt & Whitney Engines

You mean it's not a mint-scent so the jet blast doesn't smell as bad ;) ? What a great idea!! LOL ;) Not sure what y'all are talking about. I love the smell of jet-a exhaust! :bouncy: I can't wait for more cooking-oil based fuels to come out. Imagine a nice warm blast of bacon smell first thing in ...

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by LH707330
Fri Dec 03, 2021 1:44 am
Forum: Civil Aviation
Topic: First Pratt A320neo Engine Update Since 2016: Disappointing?
Replies: 30
Views: 6026

Re: First Pratt A320neo Engine Update Since 2016: Disappointing?

I seem to remember that a few percentage points (3% per the 2014 article you posted) of this 5% improvement was expected to come from the engines. It was clear the GTF reliability issues delayed the fuel efficiency improvement effort. Now it appears indeed that the initial efficiency improvement of...

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by LH707330
Fri Dec 03, 2021 12:43 am
Forum: Aviation Hobby
Topic: civilian aircraft what if
Replies: 41
Views: 7884

Re: civilian aircraft what if

Looking good. Any reason you ut the flap track canoes on before painting?

Regarding the Airfix 707, I've heard it has some shape issues, you can search on airlinercafe for some threads on the topic.

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by LH707330
Tue Nov 23, 2021 1:31 am
Forum: Technical/Operations
Topic: The first ‘Electronic E6B’s’
Replies: 14
Views: 1560

Re: The first ‘Electronic E6B’s’

Hazy memory as it has been a few years, but IIRC you can do compressibility corrections on the CRP-5, which you can't on the E6B, and you need them for EASA exams. Also I found wind calculations on the CRP-5 easier, but that's more of a style thing. Compressibility is quite a useful one to have, th...

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by LH707330
Mon Nov 22, 2021 2:38 pm
Forum: Technical/Operations
Topic: The first ‘Electronic E6B’s’
Replies: 14
Views: 1560

Re: The first ‘Electronic E6B’s’

Yes, it is still taught today, unless things have changed in the past few years. If memory serves in the US I could use an electronic E6B. For the EASA exams you have to use a mechanical CRP-5 or equivalent. Electronic is not allowed, nor is a programmable calculator. If memory serves, the E6B was ...

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by LH707330
Mon Nov 22, 2021 2:16 am
Forum: Technical/Operations
Topic: The first ‘Electronic E6B’s’
Replies: 14
Views: 1560

Re: The first ‘Electronic E6B’s’

I too came from the mechanical E6B world but never used the electronic kind. Do I remember correctly that electronic E6Bs were not allowed during exams? Was it considered cheating? As a flight instructor in the late 1980s I was still teaching the manual device. Doubtful, but do student pilots still...

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by LH707330
Fri Nov 19, 2021 12:59 am
Forum: Technical/Operations
Topic: LAT/LONG - Most accurate unit measuring system in aviation?
Replies: 7
Views: 1381

Re: LAT/LONG - Most accurate unit measuring system in aviation?

What is the most accurate LAT/LONG units below for aviation? DD MM.M' or DD MM'SS" That's the precision you're after. Accuracy is how close the stated value is to the actual value. If I told you San Fransisco is "about 38N 122W," that's more accurate than saying 35 36' 42" N 123...

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by LH707330
Fri Nov 19, 2021 12:53 am
Forum: Aviation Hobby
Topic: civilian aircraft what if
Replies: 41
Views: 7884

Re: civilian aircraft what if

flipdewaf wrote:
thebunkerparodi wrote:
Image

What's that?

Fred

Looks like a marketing person standing in front of concept sketches for SAS schemes....

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by LH707330
Mon Nov 15, 2021 5:05 pm
Forum: Aviation Hobby
Topic: civilian aircraft what if
Replies: 41
Views: 7884

Re: civilian aircraft what if

Good progress! Did you get any warpage in your wings on that kit?

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by LH707330
Fri Nov 12, 2021 11:24 pm
Forum: Technical/Operations
Topic: When pilots speak of a specific type of aircraft as "unforgiving" does that indicate a design flaw?
Replies: 15
Views: 2543

Re: When pilots speak of a specific type of aircraft as "unforgiving" does that indicate a design flaw?

I wonder if McDonnell Douglas should have just stretched the DC-10 or perhaps made a twin engine aircraft right off the bat. The design of an aircraft is a job for many engineers. I would think the engineers at MD had plenty of expertise and experience with those with the most expertise and experie...

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by LH707330
Fri Nov 12, 2021 11:14 pm
Forum: Technical/Operations
Topic: Why is Jet fuel not more popular on SE aicrafts?
Replies: 28
Views: 2473

Re: Why is Jet fuel not more popular on SE aicrafts?

Nah, weight isn't much of a factor. Diesels are ridiculously efficient. If anything, weight helps the CG. The DA62 is like a modern Twin Comanche, only with much more in reserve and more space. The real issue is price. A DA50 is $1m. A used Bonanza is $200K. That is a massive difference. When they'...

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by LH707330
Wed Nov 10, 2021 11:52 pm
Forum: Technical/Operations
Topic: Why is Jet fuel not more popular on SE aicrafts?
Replies: 28
Views: 2473

Re: Why is Jet fuel not more popular on SE aicrafts?

Another thing to add, diesel engines, partly due to the higher compression ratios, tend to be heavier for their power output due to their beefier structure. While they burn less fuel, their addition to empty weight means that you pay a penalty on short trips and would gain more on longer trips. Mos...

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by LH707330
Tue Nov 09, 2021 10:08 pm
Forum: Technical/Operations
Topic: Why is Jet fuel not more popular on SE aicrafts?
Replies: 28
Views: 2473

Re: Why is Jet fuel not more popular on SE aicrafts?

N1120A brings up a good point about the fleet makeup, it's a bit of a chicken/egg thing. Something to add to that is that few places are as familiar with overhauling diesels, so your maintenance options are more limited. Another thing to add, diesel engines, partly due to the higher compression rati...

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by LH707330
Tue Nov 09, 2021 5:21 pm
Forum: Technical/Operations
Topic: Can you tell the plane from this wing shot?
Replies: 20
Views: 2059

Re: Can you tell the plane from this wing shot?

You referring to the general modelers on Airlinercafe, or one of the vendors? The modelers specifically. That guy David Hingtgen has an eye for detail like no one else. Absolutely. Maybe it's time for a 767 guide there as well, there are a couple of subtle changes that would be good to have in such...

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by LH707330
Tue Nov 09, 2021 5:19 pm
Forum: Technical/Operations
Topic: why did boeing blocked some windows on one side of 747 8i hump?
Replies: 11
Views: 2482

Re: why did boeing blocked some windows on one side of 747 8i hump?

I highly doubt they'd add an aft window and randomly block 3 windows on the starboard side, then their business-class pax wouldn't be able to see outside.

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by LH707330
Mon Nov 08, 2021 5:29 pm
Forum: Technical/Operations
Topic: Can you tell the plane from this wing shot?
Replies: 20
Views: 2059

Re: Can you tell the plane from this wing shot?

The CF6-80C2 does have a larger intake ring than the PW4000, but the -80A2 has a much smaller one similar to the PW4000. I keep forgetting about the A2, thanks for pointing that out. There are not many left, mostly on -200 freighters. Also most -300s were built with -C2s, with Delta domestic -300s ...

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by LH707330
Mon Nov 08, 2021 4:57 pm
Forum: Technical/Operations
Topic: TWA 747 Question(s)
Replies: 28
Views: 3817

Re: TWA 747 Question(s)

One of the perks of old aircraft. Not related to cockpit layout but when I first started in ground operations, my airline had a fleet of 747s, quite a few of which had been added via acquisitions etc. and each subfleet was just that little bit different. Strangest I recall was a few had the control...

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by LH707330
Mon Nov 08, 2021 4:40 pm
Forum: Technical/Operations
Topic: why did boeing blocked some windows on one side of 747 8i hump?
Replies: 11
Views: 2482

Re: why did boeing blocked some windows on one side of 747 8i hump?

Have I vision trouble or some windows are clogged on the other side of this model too (and if someone has a pic showing the other side of that model, please post it here)? https://img.gulf-times.com/Content/Upload/slider/0eac67a3-5c82-45fe-b64c-b0724e11e733.jpg https://www.gulf-times.com/story/3944...

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by LH707330
Thu Nov 04, 2021 2:55 am
Forum: Travel, Polls & Preferences
Topic: Where would De Havilland be today if the Comet didnt have issues?
Replies: 16
Views: 2754

Re: Where would De Havilland be today if the Comet didnt have issues?

The Comet's cruise speed was a fair bit slower than the 707 and DC-8, so I doubt it'd have survived past 1962. The Comet 4 was also about the end of the road as far as size was concerned, so I think they'd have had to do a clean-sheet after that. A me-three would have done as well as well as the CV-...

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by LH707330
Thu Nov 04, 2021 2:40 am
Forum: Technical/Operations
Topic: Can you tell the plane from this wing shot?
Replies: 20
Views: 2059

Re: Can you tell the plane from this wing shot?

DL_Mech wrote:
The CF6-80C2 does have a larger intake ring than the PW4000, but the -80A2 has a much smaller one similar to the PW4000.


I keep forgetting about the A2, thanks for pointing that out.

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by LH707330
Wed Nov 03, 2021 8:47 pm
Forum: Technical/Operations
Topic: Can you tell the plane from this wing shot?
Replies: 20
Views: 2059

Re: Can you tell the plane from this wing shot?

https://airlinercafe.com/datas/users/1758-ge%20pw.png
-->

That's definitely a PW4000 on a 767 wing. The intake ring is too thin for it to be a CF6:

Edit, link doesn't seem to work, try this: https://airlinercafe.com/datas/users/1758-ge%20pw.png

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by LH707330
Mon Nov 01, 2021 11:49 pm
Forum: Technical/Operations
Topic: why did boeing blocked some windows on one side of 747 8i hump?
Replies: 11
Views: 2482

Re: why did boeing blocked some windows on one side of 747 8i hump?

Yeah, looks like they got it wrong in a few more places, see here: https://www.gulf-times.com/story/394468/Boeing-peddles-747-8-to-Emirates-as-alternative-to When you say "747 Advanced," are you referring to the initial 747-8i version that was shorter than the freighter? According to Randy...

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by LH707330
Mon Nov 01, 2021 4:47 am
Forum: Technical/Operations
Topic: why did boeing blocked some windows on one side of 747 8i hump?
Replies: 11
Views: 2482

Re: why did boeing blocked some windows on one side of 747 8i hump?

They didn't get rid of windows, if anything there was a net gain of 1 relative to the 747-400. Check out a few pictures of the 747-400, and count the windows on the upper deck aft of the door: 6602879,4167791 You'll see there's 8 on the port side, and 11 to starboard. The staircase goes up the port ...

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by LH707330
Tue Oct 26, 2021 3:43 pm
Forum: Technical/Operations
Topic: UPS 747 takeoff without flap fairing
Replies: 23
Views: 3655

Re: UPS 747 takeoff without flap fairing

The plane can be missing exterior panels, fairings and all sorts of things can be inoperative But don’t ever take the ashtray off the lavatory door or steal the lav flush handle. The plane is grounded at the point and I have to get a special ferry permit to fly the plane to a place to get the ashtr...

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by LH707330
Mon Oct 25, 2021 4:49 pm
Forum: Technical/Operations
Topic: What was the most powerful PW JT8D engine ever used on a Boeing 737-100?
Replies: 4
Views: 920

Re: What was the most powerful PW JT8D engine ever used on a Boeing 737-100?

I do not have any information, but since the 737-100 seemingly also had issues with the T/R, I am not sure having stronger engines would have increased that. The T/R issues were caused by having the same basic design as the 727, which added pressure under the wing and reduced brake effectiveness. M...

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by LH707330
Mon Oct 25, 2021 4:42 pm
Forum: Technical/Operations
Topic: UPS 747 takeoff without flap fairing
Replies: 23
Views: 3655

Re: UPS 747 takeoff without flap fairing

The plane can be missing exterior panels, fairings and all sorts of things can be inoperative But don’t ever take the ashtray off the lavatory door or steal the lav flush handle. The plane is grounded at the point and I have to get a special ferry permit to fly the plane to a place to get the ashtr...

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by LH707330
Mon Oct 25, 2021 4:32 pm
Forum: Travel, Polls & Preferences
Topic: So sick of all these cancelled flights
Replies: 24
Views: 3002

Re: So sick of all these cancelled flights

I paid for Southwest to fly me from BNA to DCA on Friday, October 8, at 3:10 p.m. They did not provide that service. When I cancelled my ticket, they were offering to provide that service at 5 p.m. the following day--26 hours later. That is not what I agreed to. My view is that if an airline is sel...

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by LH707330
Mon Oct 25, 2021 4:22 pm
Forum: Civil Aviation
Topic: American Airlines to add logo to winglets
Replies: 65
Views: 10889

Re: American Airlines to add logo to winglets

Not a fan of any logo being EVERYWHERE on the plane. Just looks redundant like the airline is afraid you will forget who you’re flying with or who they are. Though Delta made it work (kinda) on their a350. Front and back is ok obviously. Winglets? Nah. I think the magic number is 2. It could be pho...

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by LH707330
Mon Oct 25, 2021 4:16 pm
Forum: Civil Aviation
Topic: Analyzing The Airbus A380’s Premature End
Replies: 191
Views: 30562

Re: Analyzing The Airbus A380’s Premature End

Buchholz' thought about delaying the original program even further is really silly IMO. It already was delayed, further delays (years!) to redesign with new engines would only have resulted in airlines losing faith in Airbus abilities to even build the aircraft, cancelling orders and giving Boeing ...

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by LH707330
Sun Oct 24, 2021 6:24 pm
Forum: Technical/Operations
Topic: Could MD-11's used domestically do without the winglets?
Replies: 31
Views: 3201

Re: Could MD-11's used domestically do without the winglets?

FX isn't the type of company for after market winglets, they didn't even install the already certified winglets at their 767-300F fleet, so installation of the not certified winglets at the MD10 was never even considered. UPS installed after market blended winglets at the 767-300F's, but from 2019 ...

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by LH707330
Wed Oct 20, 2021 3:36 pm
Forum: Technical/Operations
Topic: When/why do airports reverse approach/departure directions, and how do they switch back?
Replies: 3
Views: 1171

Re: When/why do airports reverse approach/departure directions, and how do they switch back?

Tailwinds catch up with you pretty quickly, because your braking distance once on the ground scales as roughly the square of your ground speed. Winds aloft are also typically 5 kts higher than at the surface, so if you need to fly a given vref, your GS might be vref+15 with a 10-kt surface wind. As ...

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by LH707330
Mon Oct 11, 2021 4:08 pm
Forum: Travel, Polls & Preferences
Topic: So sick of all these cancelled flights
Replies: 24
Views: 3002

Re: So sick of all these cancelled flights

I agree with the OP, this is not a good look for Southwest, or the other airlines who have done this recently. Some airlines have done a pretty good job maintaining their schedule, or at least more proactively changing things before they go sideways, so it's obviously possible. I think some stricter...

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by LH707330
Wed Oct 06, 2021 1:11 am
Forum: Technical/Operations
Topic: 747 serial 20887 - change of engine mfr.?
Replies: 4
Views: 1276

Re: 747 serial 20887 - change of engine mfr.?

viewtopic.php?t=768933
-->

It is rare, but it does happen. A handful of the 747 classics got their engines swapped out, there's more info here: viewtopic.php?t=768933

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by LH707330
Mon Oct 04, 2021 5:37 pm
Forum: Technical/Operations
Topic: Is innovation declining?
Replies: 89
Views: 5031

Re: Is innovation declining?

[Edit: totally forgot about the A300, that eliminates the 1971-1975 hole...] 1981-1985: gap between 767 and A330/340, some work on derivatives (763, 743, 744, MD11). 1995-1999: gap between 777 EIS and full-bore A380 development, more derivatives. Love new data. Didn't know the actual dates. Thanks....

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by LH707330
Mon Oct 04, 2021 4:34 pm
Forum: Technical/Operations
Topic: Is innovation declining?
Replies: 89
Views: 5031

Re: Is innovation declining?

No one outside of China is developing a new commercial airliner now. The 787/A350 was launched in 2004/2006. That's a long time ago. I understood that the A350/787 was about 15%-20% more economical than the A330/777. And that at least half that was the engines. So even if the A350/787 are very diff...

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by LH707330
Mon Oct 04, 2021 4:10 pm
Forum: Technical/Operations
Topic: 747-8 engine choice
Replies: 46
Views: 4008

Re: 747-8 engine choice

One related question I've got on the 747-8 engines: did the thrust line get moved up relative to the wing versus the 400? The 400 pylons certainly look a lot deeper than on the -8, where the engines look much more cramped underneath the wing. Did they keep the bottom of the nacelle in about the same...

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by LH707330
Mon Oct 04, 2021 5:04 am
Forum: Technical/Operations
Topic: 747-8 engine choice
Replies: 46
Views: 4008

Re: 747-8 engine choice

There are two things at play: 1. The 747 has less T/W in most conditions than modern twins because of the OEI consideration. This means that it usually climbs at a more leisurely rate, as do most quads vs their twin counterparts. 2. Initial cruise for many planes is to alarge degree a function of wi...

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by LH707330
Sat Oct 02, 2021 6:44 pm
Forum: Technical/Operations
Topic: VFR with Single Engine Piston into big airports in the US
Replies: 10
Views: 1077

Re: VFR with Single Engine Piston into big airports in the US

I did approaches into larger airports in the US when I was working on my Commercial SEL cert, usually ATC is pretty friendly. We did a flight to KPDX (Class C) and the approach controller asked us for best speed down final because we had following traffic. KSEA usually won't let you do practice appr...

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by LH707330
Sat Sep 25, 2021 7:36 pm
Forum: Technical/Operations
Topic: What makes up of the JT3D hush kit?
Replies: 12
Views: 1276

Re: What makes up of the JT3D hush kit?

These really aren't considered Stage anything hush kits right? No noise Stages existed yet. I do know there was Stage I noise aircraft that had Stage II hush kits, but Stage II is not all that quieter then Stage I. I assume if these were any Stage hush kit, these would likely be considered Stage II...

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by LH707330
Sat Sep 25, 2021 4:22 pm
Forum: Technical/Operations
Topic: What makes up of the JT3D hush kit?
Replies: 12
Views: 1276

Re: What makes up of the JT3D hush kit?

Is that an engine ferry pod? The inboard piece is a ferry pod, the mount on the engine at the left of the picture are the "organ pipes" that were added to most, if not all turbojet and Conway-powered 707s. The JT3Cs had the two circles with 10 pipes each, and the JT4As and Conways each ha...

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by LH707330
Fri Sep 24, 2021 3:41 pm
Forum: Technical/Operations
Topic: What makes up of the JT3D hush kit?
Replies: 12
Views: 1276

Re: What makes up of the JT3D hush kit?

There was a hushkit fitted to early 707s, which looks pretty bizarre. I've heard it referred to as the "Buck Rogers". I can't imagine that this was tremendously effective (hence, why it was so difficult to find an image of it): https://i.stack.imgur.com/z6Eji.jpg Would you guys think that...

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by LH707330
Thu Sep 23, 2021 4:48 pm
Forum: Technical/Operations
Topic: What makes up of the JT3D hush kit?
Replies: 12
Views: 1276

Re: What makes up of the JT3D hush kit?

Which version are you talking about? I'm aware of at least 3 hush kit designs for the 707: 1. Comtran longer duct long intake on the 300B/C (seems to be the most common one) http://www.michaelprophet.com/News_articles/The707Collection/imagesB707/memories/9.jpg Scroll to the DAS Air Cargo pics: http:...

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by LH707330
Thu Sep 23, 2021 4:34 pm
Forum: Technical/Operations
Topic: 747 small "hump" in front of tailfin
Replies: 12
Views: 2778

Re: 747 small "hump" in front of tailfin

There was a PIP of the " Dorsal fin fairing", it was introduced around 1993/94 and even all our KLM 747classic's were modified in 1995 to obtain a fuel saving of 0,25 %. Are you referring to this one? https://live.staticflickr.com/65535/49838607166_9657126085_c.jpg Thread on that here: ht...

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by LH707330
Tue Sep 21, 2021 3:17 pm
Forum: Technical/Operations
Topic: Why do some major airports like LAX and PHX not have crosswind runways?
Replies: 22
Views: 3816

Re: Why do some major airports like LAX and PHX not have crosswind runways?

Some major international airports seem to only have runways for average prevailing wind conditions. Why do they not have a crosswind runway for special circumstances? Do these airports not experience extreme crosswind conditions at times? And what do airlines do in extreme crosswind conditions at t...

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by LH707330
Mon Sep 20, 2021 4:50 pm
Forum: Technical/Operations
Topic: How much effort to develop ATR combi with front pax loading?
Replies: 10
Views: 1525

Re: How much effort to develop ATR combi with front pax loading?

If you see the draft drawings in OP, 8th row is configured as exit row in A,B and C configs. My concern was whether that would comply with 14 CFR 25.813, which states "Where more than one floor level exit per side is prescribed, at least one floor level exit per side must be located near each ...

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by LH707330
Fri Sep 17, 2021 3:53 pm
Forum: Technical/Operations
Topic: How much effort to develop ATR combi with front pax loading?
Replies: 10
Views: 1525

Re: How much effort to develop ATR combi with front pax loading?

Gotcha. Two things I'd be curious about then: 1. Would you need to have he exit doors in the last row so that there are no dead ends? Recall the discussion about the 748 grandfathering the nose section with the evacuation rules saying you always need two paths in case one is blocked. 2. When were th...

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by LH707330
Thu Sep 16, 2021 5:11 pm
Forum: Technical/Operations
Topic: How much effort to develop ATR combi with front pax loading?
Replies: 10
Views: 1525

Re: How much effort to develop ATR combi with front pax loading?

I thought flexible dividers were no longer certifiable after the SAA 295 crash, not sure if OP's idea is to move that bulkhead from one flight to the next or to keep it fixed. Regarding the W+B, having a cargo bay all the way in front or all the way in back would have a long moment arm. Either way y...

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