November 10, 201114 yr Tomorrow is my big day. I will spend 2 hours in the LevelD Sim on the 737-800W. My plan isto start at KLGA Cold dark at gate. Power up and taxi to RW4 to KEWR 22L, taxi to 4L and fly to KJFK for the Parkway Visual 13L approach. Taxi to 22L and flt to KLGA via the Expressway Visual 31 appraoch. Then I will turn the weather bad 1/2 Mile vis, 29.45 ALT, rain, 400' ceiling. I will do KLGA to KBOS via the WOONS arrival to RW 4R.I been practicing this all week. I am having great difficulty slowing down. At FL190 I start my decent 70 mikes from KBOS to cross JEWIT at 11,000 and 250 KTS. I slow down to 200 kts at FL190 and decend at 1800 fpm, at 11,000 I am over 250 KTS (ZFW 121,900 lbs, 10,000lbs fuel). I reduce to 200 kts at 10,000 and start my decent to hit the NABBO at 3,000 (no time to level off to slow down). I am now at 260 kts again at now glide slope and loc are active. I can't level off, I need to decend, speed brakes are getting pounded by rain. I drop the gear at 2500 ft and ride the approach down to 400' with the speed brakes on ( a no-no I know) . I hit 4R at 160 kts and toast the brakes.So either I slow down to 150 kts at 10,000 ft and decend at 1800 fpm or plan a really long decent at 1000 fpm. What is the trick to go from 10,000 to 3,000 without gaining speed? ATC won't allow a decent rate of 800 fpm. Paul Gugliotta
November 10, 201114 yr I'm no expert so please don't think I'm being clever but:- start the descent earlier, or slow down more before you descend- be more aggressive with the speedbrakes whilst up high - all I read says the NGX is slippery, so use of the SB is not out of the ordinaryWhat else is there? The speed/descent equations are what they are, so if you can't do it - and I share that pain, I've struggled more than once - then it's about sorting it earlier, I think.More than happy to be corrected, mind. Paul Skol
November 11, 201114 yr yes dont be shy to use the speedbrakes, and remember slow down then come down, or come down then slow down, but you cant really do both, most importantly stay ahead of the aircraft....but that sounds like it could take longer than 2 hours though, how did you get this opportunity if i may ask? Bryan Richards "People depend so much on automation that they forget how to get the automation to work." B.W.
November 11, 201114 yr Author These are open to the public at $1100 for 2 hours. I am doing it at Miami Airport Port. There is a school there that will allow you to use any one of their simulators. I flew the 767 about 5 times and now I am trying the 737NGX just to see how it compares to the one we use. I timed this whole trip and can do it in 1 hour and 40 minutes, that leaves me 20 minutes to fly TNCM (St Marteen approach). I've done the exact scenario with the 767 in a 2 hour stint last year. Paul Gugliotta
November 11, 201114 yr I just did this flight from LGA to BOS, no problem being established at flap 5 before NABBO at 3000' with a rate of descent -1200 from 11000 at JEWIT down to 3000 even with a 30kt tail wind.. You'll find in the Level D sim it will behave differently.. I didn't use speedbrakes either.. I wish I could help you more.. Tony Fontaine
November 11, 201114 yr Author Hmm, I wonder why I am accelerating! I'll try 1200 fpm from JEWIT instead of 1800 fpm and see if this helps. At 11,000 I'll set up at 200 kts and hopefully at NABBO I can be at 170 kts or less.Thanks for trying. Paul Gugliotta
November 11, 201114 yr Well, in reality 200kts is too slow at JEWIT.. 240 is more like it.. If you can't accomplish it with the -1200 rate of descent without exceeding 250 kts, I'd try to reinstall honestly.. But.. -1800 is too steep from 11000-3000ft.. Let me know how it works out..
November 11, 201114 yr Author OK that worked out better. At 200 KTS 11,000ft at JEWIT I decended at 1200 fpm and at 3000' I was at 235 kts (no speed brakes) flaps 5. That gave me 15 miles to NABBO at 3000 to slow down as much as I want. So at NABBO I was perfect. Thanks for the flying lesson. Paul Gugliotta
November 11, 201114 yr Tomorrow is my big day. I will spend 2 hours in the LevelD Sim on the 737-800W. My plan isto start at KLGA Cold dark at gate. Power up and taxi to RW4 to KEWR 22L, taxi to 4L and fly to KJFK for the Parkway Visual 13L approach. Taxi to 22L and flt to KLGA via the Expressway Visual 31 appraoch. Then I will turn the weather bad 1/2 Mile vis, 29.45 ALT, rain, 400' ceiling. I will do KLGA to KBOS via the WOONS arrival to RW 4R.I been practicing this all week. I am having great difficulty slowing down. At FL190 I start my decent 70 mikes from KBOS to cross JEWIT at 11,000 and 250 KTS. I slow down to 200 kts at FL190 and decend at 1800 fpm, at 11,000 I am over 250 KTS (ZFW 121,900 lbs, 10,000lbs fuel). I reduce to 200 kts at 10,000 and start my decent to hit the NABBO at 3,000 (no time to level off to slow down). I am now at 260 kts again at now glide slope and loc are active. I can't level off, I need to decend, speed brakes are getting pounded by rain. I drop the gear at 2500 ft and ride the approach down to 400' with the speed brakes on ( a no-no I know) . I hit 4R at 160 kts and toast the brakes.So either I slow down to 150 kts at 10,000 ft and decend at 1800 fpm or plan a really long decent at 1000 fpm. What is the trick to go from 10,000 to 3,000 without gaining speed? ATC won't allow a decent rate of 800 fpm.You defenitily have too much energy for the approach (or don't loose enough). Try to start descending earlier.Why do you slow down already at FL190? Remember, if your speed is higher, you have more drag and will loose more energy thus ending up lower or slower.Start your descent in VNAV and make sure you enter the wind forecasts. If you have the info about multiple wind speeds at multiple altitudes, put it in the FMC too.To calculate a typical rate of descent, use the rule of thumb (for a 3degree glidepath that is)Ground speed = IAS * 5So at FL 190, your groundpeed is about (250 IAS + 2% for every 1000') 345 kts, or read GS from one of your displays.354 * 5 = 1725 f/mOff course, your V/S will change. At final, your GS is about 150 KTS, so your rate of descent will be 750'/min.More rule of thumbs?http://www.b737mrg.net/downloads/b737mrg_thumbrules.pdfBert Van Bulck
November 11, 201114 yr Approaches are not difficult, just stay calm and be yourself, the girl will eventually share the bed with you.
November 11, 201114 yr Author It seems per the other posts, I should start the decent before TOD. I'll decend earlier it'll work. I'll look at the INNDY2 approach for my next flight.Thanks for the advise (all above). Paul Gugliotta
November 11, 201114 yr If you're close and fast <12nm and 250kts, just drop the gear. Probably before that if you're consistently fast on the approach. Use the VNAV. Make it do the work. If there are "at or above" restriction, make them hard altitudes.You shouldn't have to start slowing below 280 until 10k and 250 until 20nm. You'll have ATC and the jets behind you screaming at you if you start slowing above 10k. Matt Cee
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