Hey Guys! I have a new problem with my NGX. Whenever i want to manage my descent by myself ( dont follow the Vnav path ) the speed goes up and up and up. I turn -1300 V/S into my A/P, but its very hard to reduce speed. I'm flying at IVAO, so i cannot follow the Path everytime and always approaching with 210 knt its annoying. If you dont understand something, please ask me, then i try to describe it better. Thanks Guys, regards

The only problem here is you. The -800 series is notoriously slippery on decent, even more so with winglets. The speed brakes don't have much effect to slow the plane down either.. You need to decelerate before the TOD point in order to get down at a reasonable speed. Just goes to show how realistic this bird is

Okay, i know what you mean, but imagine that we have full ATC at IVAO and the controller decide when i have to start my descent. 2 times i heard "Expedite Descent" but i was already flying with Level Change. Any Chance to fix that?

This is actually the way the real 737 acts, so it's perfectly normal as being said previously. The key here is planning, and being ahead of the airplane. It takes some practice, but eventually you will get used to it. A good advice is to print out charts for the places you are flying to, that way you can better manage when to start slowing down and what speed to aim for at a given point on your approach. Also, check out the video made by a real 737 FO (sticky thread on this forum).Good luck! :)

The only problem here is you. The -800 series is notoriously slippery on decent, even more so with winglets. The speed brakes don't have much effect to slow the plane down either.. You need to decelerate before the TOD point in order to get down at a reasonable speed. Just goes to show how realistic this bird is

Typically, the VNAV will give you a Top Of Descent (TOD) that will give you a deceleration point (eg. 10,000' 250kias). You probably wouldn't slow down at FL370 and then start down. If you're cruising at .78 and then you all of a sudden slow back to 250 for the descent, you might make some enemies.

Okay, i know what you mean, but imagine that we have full ATC at IVAO and the controller decide when i have to start my descent. 2 times i heard "Expedite Descent" but i was already flying with Level Change. Any Chance to fix that?

If you're descending at 280/.78M you could speed up or you could use the speedbrakes or you could say "unable." If you're having a hard time getting down, request an early descent. Especially if you've got a tailwind.

we have full ATC at IVAO and the controller decide when i have to start my descent.

Do they know how to replicate ATC operations realistically??In real world sectors/centers will actually bring you down in series of step-downs.And like Matt said above - you can always say "unable".

I know this is slack and bad planning on my part. but i tend to ride the speed brakes all the way down so i can get the 2500fpm

Do they know how to replicate ATC operations realistically??In real world sectors/centers will actually bring you down in series of step-downs.And like Matt said above - you can always say "unable".

They know how ;) There are also reallife controllers amongst them, so. I think Dominik just has difficulties with the 737, He also can request a descent when almost reaching T/D. He doesnt have to wait until the controller put's him to lower levels.

Two things: you can lower the wheels to slow down; and do not use the slash keystroke to use the speedbrake - it will fully deploy the spoilers which doesn't slow down as much. The manual says to click on the spot on the pedestal to deploy the speed brake, and it slows down very fast. henri

Well I have flown 2 slippery jets in real world. DC-10 and the G-5. Both will gain speed with a high descent rate. The most I can get out of these jets is 1500fpm clean. Anything more and you need some drag devices. As stated you have to plan ahead and know your jet. On the East coast,(DC to NY) you will get what we call the slam dunk. They keep you up to avoid traffic corridors and then dump you in with all types of crossing and speed restrictions. A few times I have told ATC that I can either get down or slow down but I can't do both. So a common technique is to use 3 or 4 times your altitude to lose. 4 times works best as it allows you to slow at 10,000. I also use 12 at 12 or 13 at 13 for 250 at 10,000 weight depending. 1200fpm at 12000 or 1300fpm at 13000 usually gets you close in a clean configuration. So if I want to be at 2000ft at the IAF and I'm cruising at 410. That's 39,000 to lose. 4 times 39 is 156. So 156nm prior, I want to be descending. So 10 to 20 miles prior I will request lower. Usually takes a little before they will clear you or they will tell you to make the request with the next controller as they hand you off. If you fly past your planned descent point, slow down. Sometimes you can slow down and lose altitude as the aircraft gains speed in the descent. If you get behind, don't be afraid to configure. Be mindful of speed brakes and flap combination, you may have to retract the brakes to use more flaps. A few times I have picked up the normal glide path at 1 to 2 miles from the runway. Gear is my last resort as I don't like leaving them hanging for long periods for obvious reasons. Last thing is use the HUD!!! It gives you the info needed to judge an aim point to capture the glide path. Tune up the ILS for extra SA.

I use vnav to descend and something I do is to add a speed restriction of 225 I also mod the speeds at waypoints before the iaf so that I am at 185 and ready to drop flap at the iaf. This plane does an amazing job at meeting the speed restrictions with vnav. It will even tell you if you will need to use speedbrakes at an upcoming waypoint.Guthrie z

Here is how I do a manual descent. When you are ready to descend move your throttles to the idle position, hit the speed intervention button and set 250 knots, and add speed brakes as required.

I use vnav to descend and something I do is to add a speed restriction of 225 I also mod the speeds at waypoints before the iaf so that I am at 185 and ready to drop flap at the iaf. This plane does an amazing job at meeting the speed restrictions with vnav. It will even tell you if you will need to use speedbrakes at an upcoming waypoint. Guthrie z

I use this technique also.

Guys - do not come out of the flight levels putting around at 250. You spend all this money on a sim that models real life and you want to fly it like a Cessna 150. .78/280 from TOD250 below 10k20 miles from the threshold start slowing. Start down early, but don't slow down early. If you slow down at altitude, you're wasting gas and descending at a V/S that is too low. Faster is better. Crank up the IAS and drop like a rock.

I personally spent a lot of time checking speeds and descent rates comparing them to the real plane during testing and I have to say PMDG got it right. The simple fact is it is hard to slow the 737 down. A technique you can use with the controllers is when you are getting near your planned descent point and they have not given you a descent clearance ask them for a lower altitude. They may be used to other FS planes that descend quicker then the 737. That is what we do in the real plane.