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shamrockflyer

Nitpicking...

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I just thought I'd chime in on this one... I believe that frame rates also affect the visual simulation of the strobes, so timing them visually can be a bit subjective.  If I remember correctly, somewhere around 30fps gives you a close approximation to 60 seconds of sim time being equal to 60 seconds of real time - but don't take that as gospel.

Best wishes.


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16 hours ago, scandinavian13 said:

Source?

I just ran p3d at night to test the strobe light and yes indeed in PMDG it's clearly slower, sometimes you gotta admit you are wrong ...

 

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Does it  really  matter


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12 hours ago, Pablo Vazquez said:

Really??...  I mean.... Seriously?????.... So many other important things to worry about and this is what concerns you???... I guess I’m gonna have to install a rear view mirror outside my window to see how my strobe lights are doing through my flight... Geez, just another thing to worry about!!!!! 🙄😳

 

PVazquez

🤣


Rick Almeida

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4 hours ago, xapangoo said:

I just ran p3d at night to test the strobe light and yes indeed in PMDG it's clearly slower, sometimes you gotta admit you are wrong ...

 

That's about 44/min

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I don't have any video editing skills, or else I'd put together a video with the PMDG strobes and RW strobes side by side to prove that the timings aren't correct. 

For those of you that feel such things aren't important then why are bugs on the windshield so big of a deal then? 

The evidence is clearly there, but you come across as reluctant to point out that yes the timings in your simulation of the 748 for the strobe lights are incorrect, as you do with many similar posts on this forum with evidence or not. 


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6 hours ago, xapangoo said:

sometimes you gotta admit you are wrong ...

Sometimes people need to provide evidence of their viewpoint.

Thanks for doing so.


Kyle Rodgers

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5 minutes ago, shamrockflyer said:

The evidence is clearly there, but you come across as reluctant to point out that yes the timings in your simulation of the 748 for the strobe lights are incorrect, as you do with many similar posts on this forum with evidence or not. 

I asked for evidence. I didn't ask for a rock-solid case. The one guy provided a video of what he sees as an inaccuracy. That, in and of itself, is evidence.


Kyle Rodgers

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16 minutes ago, shamrockflyer said:

I don't have any video editing skills, or else I'd put together a video with the PMDG strobes and RW strobes side by side to prove that the timings aren't correct. 

For those of you that feel such things aren't important then why are bugs on the windshield so big of a deal then? 

The evidence is clearly there, but you come across as reluctant to point out that yes the timings in your simulation of the 748 for the strobe lights are incorrect, as you do with many similar posts on this forum with evidence or not. 

You can’t assume that the make and model of the strobe lights on every in-service 747-8 is the same as every other, or that their performance characteristics are all the same.The model has been in production since 2010.

As mentioned in previous posts, newer LED strobes flash fewer times per minute than gas-discharge strobes. The “on” time of the light is much higher with LED’s. It’s more like turning a switch off and on at regular intervals.

The flash duration with gas-discharge strobes is only a few milliseconds by contrast.

Are all -8’s equipped with LED strobes? I don’t know. If they are, and always have been LED’s, has there been any change in Boeing’s  supplier of the lights over the last 8 years.

My employer has several Dassault Falcon 900 aircraft which were originally equipped with gas discharge strobes, and all have been upgraded to LED models made by Emteq, who is a major player in the aircraft lighting industry - but not the only one who supplies lighting solutions to aircraft manufacturers by any means.

In order to comply with the provisions of FAR 25.1401, we, as the aircraft operator are required to measure and record the light intensity and flash rate of the installed anti collision lights every 24 months. I just looked at the maintenance records for the tests done on the old gas-discharge strobes vs. the newer LED on one particular aircraft. The original gas discharge strobes had a measured flash rate of 78 flashes-per-minute. The LED replacements flash 55 times per-minute. That’s a significant difference.

As long as the PMDG strobes flash at least 40 times per minute, they are in compliance with FAA regulations.

 

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Jim Barrett

Licensed Airframe & Powerplant Mechanic, Avionics, Electrical & Air Data Systems Specialist. Qualified on: Falcon 900, CRJ-200, Dornier 328-100, Hawker 850XP and 1000, Lear 35, 45, 55 and 60, Gulfstream IV and 550, Embraer 135, Beech Premiere and 400A, MD-80.

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4 minutes ago, JRBarrett said:

You can’t assume that the make and model of the strobe lights on every in-service 747-8 is the same as every other, or that their performance characteristics are all the same.The model has been in production since 2010.

Yeah, I was going to add similar, but decided it was too humid here in DC to don that flame suit to weather the reactions of "you're just unwilling to admit you're wrong."

I checked a few different operators to be sure it wasn't just a sourcing issue, so I'll confirm with the team, but it could very well be this kind of situation.

 

 

The landing lights (and tips/strobes) on our DC-3, for example, are LED. Naturally, the light output will be very different (and draw much less power) than a simulation of a period example. For the tips/strobes, the pattern is naturally very different as well.

In a different (line) example, we had planes at UAX show up with regular incandescent, and xenon landing lights all day - same and different operators. Things burn out. Things get replaced. Occasionally it's not OEM.

Edited by scandinavian13

Kyle Rodgers

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6 hours ago, pete_auau said:

Does it  really  matter

Yes. I myself was curious about the strobe lights. I didn't ask the question myself because I have a little patience for the rude responses an innocent question can generate around here. I have too much invested in PMDG's products to be banned from support.

I learned a few things from the thread. It was a valid question. It really showed the value of a user-to-user discussion forum if you can filter all the noise from people who don't approve of the question.

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On 9/26/2018 at 3:18 PM, scandinavian13 said:

I asked for evidence. I didn't ask for a rock-solid case. The one guy provided a video of what he sees as an inaccuracy. That, in and of itself, is evidence.

I provided sources for evidence - YouTube and your local airport, its not that hard to look up a video of a 748 on takeoff is it?! 

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36 minutes ago, shamrockflyer said:

I provided sources for evidence - YouTube and your local airport, its not that hard to look up a video of a 748 on takeoff is it?! 

Not everyone has access to a 747-8 at their local airport because the 747-8 doesn't fly to every single airport that's out there. That said, in his case, it happens to fly there, and as noted by the following:

On 9/25/2018 at 2:35 PM, scandinavian13 said:

As someone who watches the DLH 748 (increasingly in the darkness as winter approaches), I can see quite well that we've modeled it accurately.

So not really sure where you're trying to go with this. In any event, if you have a look at Jim's explanation prior to Kyle's last post, it could be that each aircraft has a different timing for the lights, in which case, it's a situation of damned if you do, damned if you don't.


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OMG... I truly don’t understand WHY this is so important??... GEEZ... Enough!!! 

Edited by Pablo Vazquez

Pablo Vazquez - Flight Attendant - Major US Airline

(P3D v4.3, PMDG 744v3, PMDG 748, PMDG 777, PMDG 737 NGX, QualityWings 787, Captain Sim 757, Aerosoft Airbus Professional and FSLabs A320x)

 

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18 minutes ago, Captain Kevin said:

So not really sure where you're trying to go with this. In any event, if you have a look at Jim's explanation prior to Kyle's last post, it could be that each aircraft has a different timing for the lights, in which case, it's a situation of damned if you do, damned if you don't.

+1

13 minutes ago, Pablo Vazquez said:

OMG... I truly don’t understand WHY this is so important??... GEEZ... Enough!!! 

+2

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