Which offsets for eng.starter switch???

[Potrohkocsonya]

Hi Peter,

Since you mentioned Thomas Richters 737NG program (extended functionality to PMsystem) I´m puzzled to what extend I should/could use it in combination with PMsystem.

That's an excellent program and of course you can use it with pmsystems. The main advantages are the sixpacks logic, bleed system and a lot of small additions and his great autobrake stuff.

Unfortunately haven´t seen any note from Thomas telling whether it is still required to do so also for latest releases of PMsystem.

You always need to take out some lines from the default one, that hasn't changed as far as I know.

I hope I´m not a nuissance to you when bringing up one of my question from some msg before concerning the aircraft model / airfile you are using.

I'm using the pmdg flight model, modified here and there a bit. Tried the other possibilities too, but that one is still superior.
I suppose you are flying FSX, where the model undoubtedly gives some trouble, but little tweaks can solve that, at least it did for me.
If you can't trim it right, perhaps you should play with the weight values.
Do you use the the entire suit, I mean cdu too?

regards
Potroh

[PeterH]

Hi Potroh,

yes, the sixpack and autobrake stuff was the main reason I bought that nice program.

I´m using the complete PM suite (GC;CDU;PMsystems) and I´m still on FS9.
May flight model is the PMDG B737-700, but that model givin me some trouble in terms of trim. On top of this the TO warning keeps going off when applying a lottle more than taxi thrust.
That´s why I asked.

Best rgds

Peter

[Peter Dowson]

On top of this the TO warning keeps going off when applying a lottle more than taxi thrust.

That's normally because you've not set suitable take-off flaps, 5 or 10 usually.

Most 737NG models move with idle thrust, you only need a little extra to get to taxi speed then much of taxiing is done with idle. I don't think the PMDG model gets that quite right, but nearly.

Regards
Pete

[Potrohkocsonya]

I´m using the complete PM suite (GC;CDU;PMsystems) and I´m still on FS9.
My flight model is the PMDG B737-700, but that model givin me some trouble in terms of trim.

Hi Peter,

Hmmm, that's interesting.
I thought you were using FSX, because trim problems are the sysptoms there.
In FS9 it should be nearly perfect. Which aircraft.cfg file do you use in the cdu?
And did you calibrate the trim gauge in the GC according to the FS values?
What does the cdu say re CG and trim settings?

regards
Potroh

[PeterH]

Hi Potroh,

sorry for late response.

CDU ref file = B737700.txt (Nothing modified)
I tried different values for CG (approx 25%)
The trim values are around 5.
But couldn´t find any value sofar giving a satisfying result.

Concerning the TO warn my flaps are set to 5 and also 5 is entered in the CDU - But ´t see any difference in terms of TO warn. The warning comes on every time at take off roll.
Have you got a clue which parameters are taken to trigger the TO warn? (My guess is: trim, flaps, spoilers, brakes... what else?)

Starter Solenid:
Have tried the modification for the starter solenoid, sorry to say that i did not succeed (No reaction on the test LED). Will have to look closer to it. Do I have to define cutout1 (2) (something like: cutout1 0) in the init section of the pmsystem.lgc)?
Manengstart1 (2) is defined there:

"[init]
batt1 1
ignitionLCR 1
manengstart1 1
manengstart2 1"

The Hardware (FSBus + Test LED) is working nicely when reading the offset of the "low oil pressure" or the "Start valve open" from the UpperEICAS.
That would at least be some kind of solution, but would rather prefer me to be in control of setting the conditions in the code; I´m sure you know what I mean.

One thing I noticed is, that even the manengstart1 is defined to become 1 at N2>50 (flip back of the starter to OFF pos.), the starter flips back already at around N2 being 30, not waiting for N2 reaching 50.
Have searched for the code where manengstart1 is probably defined a second time but to N2>30, but couldn´t find anything. It seems it´s controlled by something else but not PMsystem. (at least I couldn´t find the corresponding trigger.)

Thanks
best regards

Peter

[PeterH]

That's normally because you've not set suitable take-off flaps, 5 or 10 usually.

Most 737NG models move with idle thrust, you only need a little extra to get to taxi speed then much of taxiing is done with idle. I don't think the PMDG model gets that quite right, but nearly.

Regards
Pete

Hi Pete,

thanks for reply.
When releasing the Parking brake I need to apply a little more thrust in order to get the plane just moving. But that´s already enough to trigger the TO warn sound.
Same of course takes place when starting the take off roll and only stops when airborne.
My Flaps are set according to the CDU setting (5 degree).
Also different trim settings make no difference. Brakes are off. Spoilers down.
What else could be the culprit here? Could it be the weight and balance is out of range? Using the B737700.txt as ref file in CDU.

Thanks and best regards

Peter

[Peter Dowson]

When releasing the Parking brake I need to apply a little more thrust in order to get the plane just moving. But that´s already enough to trigger the TO warn sound.

As I said, the PMDG modelling isn't quite right. In reality the NG series will actually start moving forwards even at idle thrust when brakes are off.

However, there's probably a setting someplace in PM which determines the threshold thrust for the TO warning.

Same of course takes place when starting the take off roll and only stops when airborne.

Aha! There's certainly something else wrong then.

What else could be the culprit here? Could it be the weight and balance is out of range? Using the B737700.txt as ref file in CDU.

Sorry, I'm not sure. The books state that the TakeOff arning occurs for any of these:

1. Stab trim not in takeoff range (green band).
2. Trailing edge flaps not in takeoff range (1-25)
3. Leading edge flaps not in correct position
4. Speedbrake lever not in down position (it says "this is the usual problem" in the Bulfer book)
5. Parking brake set
6. Spoilers not actually down with the sppedbrake lever in the DOWN position.

So, it must presumably be one of those if it isn't a PM bug. the weight and balance would change the recommended trim -- as shown against the CofG in the CDU. Check that, and also if you have the PM trim indicator showing on your PM EICAS that should show it in its green zone.

Regards
Pete

[Jan Pemöller]

Hi peter H,

in the last PM Sounds exe there is a feature which tells us why a config warning is activ.
I had the same problem in my set up. But I can not help you here, because I started a complete new sim project (FSX)!

Regards
Jan

[PeterH]

Hi,


thanks guys for your input. Appreciate it. Will check all your hints and input when time allows.

Will report my findings.

Thanks and best rgds

Peter

[PeterH]

Hi,

now I´m a happy camper again as I found the problem.

The reason for the TO warninging getting triggered was a missing space in the FSBus ini file. That caused a wrong flaps setting which eventually triggered the TO warning.

Thank you all for your contributions and help.

Best rgds

Peter