Is the default setting 1.55?

Per T/O EPR table Part IV p. 13 should we not be setting it at 1.41 for most takeoffs?

Hey Tim

Did you get a perfect autoland this time without any rocking on the approach?

Regards,
Neil

Hey Tim

Are you suggesting that you think the rocking on autoland could be due to a lack of weight - interesting point.  I may have to give this a try.  I have changed values in the cfg so many times to try and remedy the rocking on autoland but can't get anywhere with it yet.

Hmmm

I have already explored the weight idea. �It isn't that, at least not for me. �I get this behavior even at a landing weight of 165,000 lbs and a landing speed of 129 knots. �There are other operational aspects that I am still checking out and need to rule out. �I made the changes suggested by another poster (the now famous #116 post ), actually one change and I will see how that works out.

One well known 737 developer had a problem like this that most likely was caused by system performance and the CS AP "problem" sounds very familiar. �When the sim would stutter, the AP would keep on turning during the time and would get all out of synch and all kinds of issues arose from this that generated a lot of overbanking and many various, difficult to reproduce and track down problems. �I had this problem until I got my system sorted out (thank you NickN) and now it is fine. �I have a feeling the same thing may be going on here. �I have very low frame rates with the CS757 in general, even worse than the payware 747, as in 10 fps or less while on approach, and I think that on approach I am having this problem. �This is what I am trying to sort out. �This would also explain why so many people are having different and difficult to track down problems with the AP whereas others are not and also has nothing to do with the CS757 and more to do with system and operation. �My own opinion anyways. �

There is an easy way to check this out. �Do an approach with the weather set to clear and to an airport that is not hard hitting. �I get about 15-20+/- fps, and most importantly, stutter and wind shift free performance, when I do this and I will check out the results with CS 757 (haven't had a chance yet).

If there are people out there who are getting 30-40 fps AND smooth and stutter free performance and are still getting this wierd AP behavior, then I don't know what to say.

If you want to use REX but not get such a hit, try installing the lower resolution textures. �I use the 512 ones for payware aircraft and the 4096 for freeware. �Those 4096 textures are going to cost you big when it comes to performance. �Make sure that you have put a check mark in the Use DXT5 compression no matter what texture set you are using.

Also with UTX, I disable the night lighting, borth roads and intersections. �Also the newest version fo UTX adds moving cars and they are a huge peformance drain. �Go to Other Terrain Features and disable railroads, highway interchanges and glaciers. �Then go to Road Surfaces and disable Moving Traffic for... �I also turn off all traffic in FSX. �This allows me to run great REX clouds and ground textures and still be able to fly the aircraft (except maybe this one, don't know �yet ).

If you have a higher performance system you can turn some of these back on.

I also go to Ultimate Terrain, Change Road Surface Colors and uncheck all entries that say Add Auto Imprint. �This will take all the static cars off the roads.

Some of these can be done in UTX USA and will automatically apply to all other UTX areas and some you need to go into settings for each UTX area to change.

These suggestions all from NickN. �Go here for many, many more-->  http://www.simforums.com/forums/forum_posts.asp?TID=29041

When flying payware I also personally use Low water 1.X to give me some more CPU cycles to work with.

These changes should give you some more frames to work with when flying this aircraft.

Good luck.

Glad you got the water figured out. �For the record, I use GEX, all UTX's, all ST's (Scenery Tech landclass), and REX2.0 (heh heh).

By the way, the CS EPR on takeoff is a bit tricky. �Your original post asked about 1.55 etc. �You have to realize that there is typically derating involved by using an assumed temperature (see the manual about �this) and when this is used the EPR will not be 1.55 but less. �If yo do't derate, the airplane will takeoff like a rocket.

I usually map the Shift R and TOGA to keys on my joystick. �Shift R usually toggles on/off the autothrottle but does nothing in the CS and the TOGA which I assign to Cntrl F1 then to button on my Saitek. �Usually this activates takeof thrust with most airraft but with the CS seems to do something strange. �When I activated his yesterday, the autothrottle wouldn't respond properly. �Basically the engines spooled up but wouldn't maintain speed at all during the climb even even on VNAV and I almost crashed during the climb so be aware of this. �The best way is to just click on EPR during takeoff, then click VNAV when at 400' or so. �There does not appear to be a way to assign EPR to a key command with the CS. �Not having these key commands is a real hassle, especially with the autothrottle. �With the aircraft rolling gently back and forth across the course line during approach, and then having to use the mouse to shut off the autothrottle makes this action somewhat difficult and distracting as you have to move the mouse to the right location and then click it all the while trying to keep the aircraft under control. �I hope this gets fixed in the future.

To be honest I am an N1 guy.  I don't really pay much attention to EPR, although I suppose I should.

In fact, today I had my first ever perfect approach, had some weather but frames were above 10 where I usually have 6-7 with this aircraft for some reason.  To be fair, I also made the most recent cfg mods (3.92, 5.5, 2580) as well, so that is the old "one experiment with two variables changed" thing, so don't really know which did it.  But...things are definitely looking up.

Going to do another flight today soon.