Great STuff Capt Al. We do appreciate the effort you make to share your knowledge. And other aviation enthusiast in the future may find these videos a treasure too.
Hello Capt Al - Greatly appreciate these videos, extremely helpful, thank you. Question : @ 43:40 - FuelControl -1 switch brought to cutoff to show Hyd Demand Pump 1 switch over automatically from EDP. However, my understanding DP1 and 4 are air driven (DP2&3 electric), is DP1 able to switch over and provide hyd press while engine 1 is windmilling down and then you would switch to Aux to provide hyd electrically? I'm not clear where the air is coming from to provide pressure since FC-1 switch went to cutoff. Again - Thank You for these concise and informative videos, greatly appreciated.
Your welcome Megan, sometimes I think in my mind I am too slow and methodical and I can put myself to sleep and then I see 54 minutes and I think no one in the public you tube space is going to watch that, My Airline Pilot students love my briefings and I usually think, “man, I would rather hear someone else drone on than me because I put myself to sleep”, but it is hard for me to just give a down and dirty, no detail brief. The feedback I get though from students doesn’t make me change too much. Glad you got value from this...
Your welcome again, as long as you keep liking these, I will keep making them. I know I can be a little to slow in speech and being methodical, but it is my nature and hard to change...
@@subsonicflighttraining Of course i'll do , i wish i could do likes for the same video every time i watch it as i do watch them several times about slow speech, i won't be complementing you, but for me this is the perfect speed to catch the knowledge in fact a couple of times watching the vid and i can say it by heart , so I'm very happy with that ,i'm gonna recommend the channel to all aviation lovers in channels which i'm subscribed to , so keep it going .
Amazing videos, learning so much about 747, keep up the amazing content. do you guys two engine taxi ever ? For fuel saving, i would imagine if you do it would be on eng 1 and 4? Lookin at the hydronic given nose and body steering is on the system 1 and and main break is on system 4. Just wondering if two engine taxing is common practice on 747s or if Boeing suggests against it. Cheers
Thanks B3, we never did 2 engine taxi, only 3 engine at certain weights as I recall, not anticipating any tight turns or 180's. Boeing does not address it in the Flight Crew Training Manual, they leave it up to the operator. I do not think they would recommend it at all. Landing with 2 engines out on the same side, we could clear the runway with a high speed, but may have trouble with a 90 degree turn and would consider towing rather than trying to taxi with 2 out on 1 side. If you are interested in a comprehensive training course, check out my Patreon Page which just launched yesterday: patreon.com/subsonicflighttraining
@@b3njroverr67 That would be a good one for Non-Normals at the Patreon Full Captain Level as one of the monthly bonus videos, which consists of either systems or NNP, non-normal procedures. I will put that on the list. The only free videos I am putting out now would be the Livestream for the B747 FTD-PC FS course. Patreon will have the recorded Live Streams, Level Perks, and is extremely cheap ($10 or less/month for 6 months depending on level)
Really helpful video Al; I'm uaing your video to get to grips with the aerowinx PSX I've purchased. I have the PMDG QOTS2 already. I'm not sure if you're in contact with Hardy, the sim developer, but I think he would definitely advertise your videos; your videos are better than CBTs that are available freely on the internet.
Thank you Nim, I purchased the Aerowinx PSX last week, so I am looking forward to getting it. It looks quite good, I do think PMDG is very good, but not with non-normals. I did join the forum board and had a brief chat with Hardy asking him a question on how accurate the non-normals were. Glad you find value in my video tutorials...
Very informative tutorial again. I have a question regarding the freighter versions, is the hydraulic systems use to operate the cargo doors and which system is use . Thanks again
Hi Tonforr, your welcome, glad you still see value in these videos, the lower cargo doors and all equipment on a freighter are powered by the Ground Handling Bus, which is powered only on the ground by APU 1 or EXT 1, if both are available it uses EXT 1. The Side Cargo Door, Nose Cargo Door, Lights, and all Cargo Loading Equipment are powered by the Main Deck Handling Bus, which is powered by EXT 2 or APU 2, only on the ground. If you have a single power source like EXT 1 and 2 hooked up and AVAIL, you only want to power the jet with EXT 1, so EXT 2 is AVAIL, this keeps the Main Deck Handling Bus powered so they can load cargo, if you were to select EXT 2 ON, you would disable the MDHB. If you start the APU, and have APU 1 and 2 AVAIL, now you you can select EXT 2 and APU 2 being AVAIL would keep the MDHB powered so they can load. If loading complete on the upper deck, doesn’t matter, now you can select EXT 1 and 2 ON with single power source...
So u have brakes , and steering , if on auto the demand pumps will kick on since the engine pumps are off , aux pumps are only used for ground operations
Somehow I missed responding to this, sorry about that. 1 and 4 are for ground operations only and power brakes and steering only, isolating all the other components from operating with the Demand Pump in AUX. Once Engines 1 and 4 are started, AUX is disabled and the EDP takes over for all components…
@@oscarnogueraballester3994 OK, thanks, I never know when I might say something that is not right or that I did not think I said, but I did. I usually try to listen to these before I put them out to make sure I did not say something I did not mean or that could be interpreted differently...thanks for the kind words.
Yes they are, good catch. I think I implied they were pneumatic like the GE engines on the 747-400. P&W engines are hydraulic on the 400 and the GE on the -8 are hydraulic, keep me honest...
Great STuff Capt Al. We do appreciate the effort you make to share your knowledge. And other aviation enthusiast in the future may find these videos a treasure too.
Thanks Proud Birther, appreciate the feedback...
Thanks Capt Al for the video. Quick addition, hyd sys nb 1 does body gear actuation as well as body gear steering.
My bad, you do mention it at 20 minutes (external components). It just doesn't appear on the schematic at 7 minutes.
It is good to check me, you never know when you forget to say something…
Hello Capt Al - Greatly appreciate these videos, extremely helpful, thank you. Question : @ 43:40 - FuelControl -1 switch brought to cutoff to show Hyd Demand Pump 1 switch over automatically from EDP. However, my understanding DP1 and 4 are air driven (DP2&3 electric), is DP1 able to switch over and provide hyd press while engine 1 is windmilling down and then you would switch to Aux to provide hyd electrically? I'm not clear where the air is coming from to provide pressure since FC-1 switch went to cutoff. Again - Thank You for these concise and informative videos, greatly appreciated.
Thank you! Very informative. I'm looking forward to future B747 system videos.
Good to know folks want that, because when I did Fuel, I wasn't sure anyone would be interested in systems stuff...
Thank you. Concise, clear and very informative.
Your welcome Megan, sometimes I think in my mind I am too slow and methodical and I can put myself to sleep and then I see 54 minutes and I think no one in the public you tube space is going to watch that, My Airline Pilot students love my briefings and I usually think, “man, I would rather hear someone else drone on than me because I put myself to sleep”, but it is hard for me to just give a down and dirty, no detail brief. The feedback I get though from students doesn’t make me change too much. Glad you got value from this...
Thanks very much for the video , great knowledge .
Your welcome again, as long as you keep liking these, I will keep making them. I know I can be a little to slow in speech and being methodical, but it is my nature and hard to change...
@@subsonicflighttraining Of course i'll do , i wish i could do likes for the same video every time i watch it as i do watch them several times about slow speech, i won't be complementing you, but for me this is the perfect speed to catch the knowledge in fact a couple of times watching the vid and i can say it by heart , so I'm very happy with that ,i'm gonna recommend the channel to all aviation lovers in channels which i'm subscribed to , so keep it going .
Amazing videos, learning so much about 747, keep up the amazing content.
do you guys two engine taxi ever ? For fuel saving, i would imagine if you do it would be on eng 1 and 4? Lookin at the hydronic given nose and body steering is on the system 1 and and main break is on system 4. Just wondering if two engine taxing is common practice on 747s or if Boeing suggests against it. Cheers
Thanks B3, we never did 2 engine taxi, only 3 engine at certain weights as I recall, not anticipating any tight turns or 180's. Boeing does not address it in the Flight Crew Training Manual, they leave it up to the operator. I do not think they would recommend it at all. Landing with 2 engines out on the same side, we could clear the runway with a high speed, but may have trouble with a 90 degree turn and would consider towing rather than trying to taxi with 2 out on 1 side. If you are interested in a comprehensive training course, check out my Patreon Page which just launched yesterday: patreon.com/subsonicflighttraining
Awesome thanks, if you could one day do a video on a v1cut followed by maybe an 3 engine ILS followed by 3 engine go around. That would he amazing.
@@b3njroverr67 That would be a good one for Non-Normals at the Patreon Full Captain Level as one of the monthly bonus videos, which consists of either systems or NNP, non-normal procedures. I will put that on the list. The only free videos I am putting out now would be the Livestream for the B747 FTD-PC FS course. Patreon will have the recorded Live Streams, Level Perks, and is extremely cheap ($10 or less/month for 6 months depending on level)
Really helpful video Al; I'm uaing your video to get to grips with the aerowinx PSX I've purchased. I have the PMDG QOTS2 already. I'm not sure if you're in contact with Hardy, the sim developer, but I think he would definitely advertise your videos; your videos are better than CBTs that are available freely on the internet.
Thank you Nim, I purchased the Aerowinx PSX last week, so I am looking forward to getting it. It looks quite good, I do think PMDG is very good, but not with non-normals. I did join the forum board and had a brief chat with Hardy asking him a question on how accurate the non-normals were. Glad you find value in my video tutorials...
Accurate? Do you have any system videos on the forum please Capt Al ?
Very informative tutorial again. I have a question regarding the freighter versions, is the hydraulic systems use to operate the cargo doors and which system is use . Thanks again
Hi Tonforr, your welcome, glad you still see value in these videos, the lower cargo doors and all equipment on a freighter are powered by the Ground Handling Bus, which is powered only on the ground by APU 1 or EXT 1, if both are available it uses EXT 1. The Side Cargo Door, Nose Cargo Door, Lights, and all Cargo Loading Equipment are powered by the Main Deck Handling Bus, which is powered by EXT 2 or APU 2, only on the ground. If you have a single power source like EXT 1 and 2 hooked up and AVAIL, you only want to power the jet with EXT 1, so EXT 2 is AVAIL, this keeps the Main Deck Handling Bus powered so they can load cargo, if you were to select EXT 2 ON, you would disable the MDHB. If you start the APU, and have APU 1 and 2 AVAIL, now you you can select EXT 2 and APU 2 being AVAIL would keep the MDHB powered so they can load. If loading complete on the upper deck, doesn’t matter, now you can select EXT 1 and 2 ON with single power source...
Hope your doing good Capt
Thanks Mark, yes doing OK. Hope you are well...
Why do You need to turn 4 and 1 to aux before start? What happen if I turn it to auto?
So u have brakes , and steering , if on auto the demand pumps will kick on since the engine pumps are off , aux pumps are only used for ground operations
@@ArmyofSeaturtles I think they meant why not turn 1 and 4 to auto along with 2 and 3 instead of Aux
Somehow I missed responding to this, sorry about that. 1 and 4 are for ground operations only and power brakes and steering only, isolating all the other components from operating with the Demand Pump in AUX. Once Engines 1 and 4 are started, AUX is disabled and the EDP takes over for all components…
You are wrong about one thing. The demand pumps stay energized in AUTO for certain conditions. It is just not simulated in the PMDG.
Can you give me a time reference, I will listen to it...
@@subsonicflighttraining sorry my fault, you talked after about flaps extended in flight that they stay on. Great video by the way.
@@oscarnogueraballester3994 OK, thanks, I never know when I might say something that is not right or that I did not think I said, but I did. I usually try to listen to these before I put them out to make sure I did not say something I did not mean or that could be interpreted differently...thanks for the kind words.
@@alexpavlis457 checking the manuals I also found out demand pump 2+3 come on when flaps in landing positions and speed over 90 knots.
@@oscarnogueraballester3994 Yes, that sounds familiar to me and I did not mention that at all in the video...
747-8 Reversers are hydraulic
Yes they are, good catch. I think I implied they were pneumatic like the GE engines on the 747-400. P&W engines are hydraulic on the 400 and the GE on the -8 are hydraulic, keep me honest...
@@subsonicflighttraining what about RR engines?
What is something special about the 747 that a layman would not know? 🙂
The Wright Brothers could have accomplished their first powered flight inside a 747 from a nose to tail distance...