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Olympic260

744 Beta RTO video

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Excellent, brother, cheers.

 

What is that white striped display on the upper left dashboard?

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PVD  (para Visual Display). Used mainly in low vis to keep the aircraft in the centerline. You need to put valid LOC freq of the rnw you are in order to use it

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Nice video, can´t wait.

 

Should reverse thrust be avoided with an engine failure due to the difference in the thrust on each side ?

 

Best regards

 

Peter Lund

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I  believe you must use symmetrical reverse thrust, ie since 2 failed only 1 and 4 to be used. Not applicable with my hardware though.

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Nice video, can´t wait.

 

Should reverse thrust be avoided with an engine failure due to the difference in the thrust on each side ?

 

Best regards

 

Peter Lund

Nope, unless there's a MEL item to the contrary our SOP is to get full reverse out as soon as you can and bring it to a halt.

If you have directional control issues you can go to reverse idle and it should still stop by the end of the runway.

 

1.45 looks a bit low for a takeoff EPR, I thought it was nearer 1.54 at max derate...

 

Hope this helps,

 

Ian

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1.45 looks a bit low for a takeoff EPR, I thought it was nearer 1.54 at max derate...

 

I can't tell by the video which engines he had mounted in terms of PW or RR. They measure EPR differently, so the values will differ as well, so if you're used to Rollers and he had Pratts, that could be why, etc.

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Man, the sound, the rumble - I swear my heart was in my mouth right there!   I also have to say that what I notice there is the "feel" that it is heavy and big, it is difficult to describe but the feel of it is much, MUCH better than the older version.   Thanks for the video!

 

Regards

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What's the barber pole thing sitting horizontally on the dashboard? I've been in QF 744 cockpits and don't ever recall seeing that.

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What's the barber pole thing sitting horizontally on the dashboard? I've been in QF 744 cockpits and don't ever recall seeing that.

 

That is the Para Visual Display (PVD). It is used in low visibility for take-offs (it basically keeps your aircraft in the center). It takes data from the ILS frequency. Some QF 744s had it installed as well as BA, CX, and SQ.

 

http://www.aerowinx.com/html/gallery04.html

 

Cheers,

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Alright, I'll be the third to ask...what is that stripey white and bla...nevermind  :smile:

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Hmm..how does it work ? how must I read the instrument ? ..is it even an instrument ?

getting totally zen by looking at it..but how must I interpret it ?

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Hmm..how does it work ?

 

It tunes to RWY's ILS frequency and tracks the localizer.

 

 

.is it even an instrument ?

 

Yes, it is an instrument. :) Not very widely installed, but nonetheless a great tool/aid.

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Can anyone PLEASE do a GE video? GE engines produce the best sound in my opinion. It has the loudest and most distinct whine that the 747 has.

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Hmm..how does it work ? how must I read the instrument ? ..is it even an instrument ?

getting totally zen by looking at it..but how must I interpret it ?

 

As mentioned above, it wasn't the most popular option (and is regularly U/S) but BA have it (on their B777s and B767s as as well) and so do a couple of other operators mentioned above. It is a very simple and straightforward unit, however.

 

Its purpose is to enable takeoffs in lower visibility that would otherwise be possible. Broadly, the minimum RVR for takeoff for a Category D aircraft like the B747 is 150m (under EASA rules). Using an 'electronic guidance aid' brings this down to 100m, and this is where the PVD comes in (an HUD would also count for aircraft so equipped).

 

The PVD is only operational on the ground (and only unshutters when it has a valid tuned localizer signal and the aircraft heading is within 45 degrees of the runway centreline). The "barber pole" simply rotates in the direction of the centreline, and the faster it rotates the further from the centreline you are. Just apply rudder in the direction the pole is rotating to regain the centreline...

 

That's about all there is to it!

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Can anyone PLEASE do a GE video? GE engines produce the best sound in my opinion. It has the loudest and most distinct whine that the 747 has.

 

I've streamed about 10 hours of GE flying. I don't have it set to archive automatically, however.

 

Aaron has his set up to, however:

https://www.twitch.tv/lomaric/v/102783092

 

EDIT: Side note...video sites often use some sort of compression on their videos. This makes the colors bleed out a bit, and pulls back a lot of the richness of audio. While videos are close, they don't do the sound set full justice.

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Thanks Kyle,

 

Just from that video, I must admit I am slightly disappointed with the GE sound.

But due to the possible bad quality and Aaron's sound settings, I will hold off on judging too much. It also seemed that Aaron had his engine sound volume set relatively low, compared to the ambient sounds. I had expected a much louder whine.

 

I also have a question: will there be an option for extra high RPM reverse thrust? I know that KLM's 747s can use their reverse up to 95% N1. I think that is due to their St Maarten landings.

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Just from that video, I must admit I am slightly disappointed with the GE sound.

 

Right after I specifically disclaimed the sound compression inherent in videos, which is even more the case during a stream. This is why we can't have nice things...

 

Engine whine exists in the upper parts of the sound wave. Bassy notes exist in the lower parts. Which two are the first, and most affected by compression? You guessed it...

 

 

 


I also have a question: will there be an option for extra high RPM reverse thrust? I know that KLM's 747s can use their reverse up to 95% N1. I think that is due to their St Maarten landings.

 

Source?

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Here Kyle:

 

I can clearly make out 94 on the EICAS. I am not sure whether this is exclusive to KLM, but if it is, then my best guess would be that it is meant for short runways such as St Maarten. Some sort of short field package maybe?

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I can clearly make out 94 on the EICAS. I am not sure whether this is exclusive to KLM, but if it is, then my best guess would be that it is meant for short runways such as St Maarten. Some sort of short field package maybe?

 

Any actual technical documentation supporting this? I don't believe this is an actual thing.

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Any actual technical documentation supporting this? I don't believe this is an actual thing.

No, I believe PMDG has much better access to that than me.

 

If it's not a real thing, then what is it, do you think? The videos of this uploader are clearly not fake, and just listening to the sound, clearly shows that the reverse thrust is much higher than the normal 55-60%. I can ask the uploader for confirmation, as he is a real world pilot. Such information should be nearly as sufficient as documentation, considering PMDG rely very much on real world pilots.

 

I do not mean to negatively criticize the plane. I am a great fan and owner of most of your products, and I love what I am seeing so far about the 747. I am just trying to inform you about something I have noticed that might be of interest at this stage.

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Gents,

 

We are still in Beta - I am working on the GE soundset as we speak !

That is very great to hear!

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If it's not a real thing, then what is it, do you think? The videos of this uploader are clearly not fake, and just listening to the sound, clearly shows that the reverse thrust is much higher than the normal 55-60%. I can ask the uploader for confirmation, as he is a real world pilot. Such information should be nearly as sufficient as documentation, considering PMDG rely very much on real world pilots.

 

From the books:

"During the application of reverse thrust, the EEC will automatically monitor engine performance, and calculate a maximum N1 and fuel flow for engine reverse thrust in order to prevent exceeding any engine limitations during the reverse thrust."

 

How high in the band (below the limit) it goes would depend on how far you move the reverse thrust levers. Most operators pop it into idle, but you can drag the levers up a lot higher.

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Thanks Kyle, so does that mean that it will actually be possible to set our reverse thrust as high as 90+%, assuming we put our levers to their absolute limit?

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