737-800 question

[D. Robert Quick]

Surely there is someone on here familiar with the 737-800... On my Aerowinx PS 1.3 sim which uses the 747-400 as it's platform, the max. gross shows as 877,000 pounds with the max landing weight being 630,000. www.aerowinx.com

Now, on the Microsoft (far less sophisticated) sim, it shows the max gross as for the 738 as 154.323 pounds. The landing weight on the 744 is 72% of the max gross, and 72% of the 737-800 = 111,000 rounded off... My question is, is this pretty close to reality... It's the max. weight I've been using and seems to be fairly close judging by the speed it takes on final... The Microsoft sim does not simulate the MCP, so no real way to figure Vref. Plus on the airspeed strip the yellow minimum maneuvering speed and the red minimum speed stays put and does not follow weight or configuration changes... Thus, an educated guess based on that 72% figure, and the final approach speed which produces the proper pitch attitude on final... Just curious how close I have it figured.... Thanks in advance... Dave

[Don Gieseke]

Dave,

My source says max gross for the -800 is 174,200.

Now the last 737 I flew was the -400 many years ago. Converted to the Airbus, thank ya, Lord!!

Attachments:

[D. Robert Quick]

Okay Don, Well, remember that this is the Microsoft FSX and I don't know where they get their numbers... Still, my question is, would my 72% of max. seem to be a reasonable ball park figure for max. landing weight... Remember too that the red and yellow minimums tape, which moves on the real deal, is fixed at something like 143 or something like that, so without it moving according to weight and configuration, IE, lowering with the additional flaps, I can't use it as an educated guess guide...

[Don Gieseke]

Sorry, Dave. I hastily read your original post and missed the real question. My bad!!

I am no aeronautical engineer but I'm guessing that just because one a/c has a max landing weight at a certain percentage of max weight that it would apply to all a/c. Lots of things go into determining that mlw that could be totally different from one a/c to another.

I don't know anybody in this group that is an -800 driver but then I sure don't know everybody here. Good luck with getting your answer!!

[D. Robert Quick]

BOEING 737-800
REFERENCE INFORMATION

For detailed instructions on how to fly this aircraft, see the Aircraft Information
articles in the Learning Center. For standard procedures, see the Checklists tab.

Total Flight Simulator aircraft weight with full fuel 174,200 lbs


NOTE: To adjust fuel load, on the Aircraft menu, click Fuel and Load.


VMO - Maximum Operating Speed 340 KIAS
MMO - Maximum Operating Speed Mach .82 Mach
Turbulent Air Penetration Speed 280 KIAS/.76 Mach
VLO - Maximum Gear Operating Speed 320 KIAS/.82 Mach
VLE - Maximum Landing Gear Extension Speed 270 KIAS/.82 Mach

Maximum Flap Placard Speeds Flaps degrees
KIAS

0
340

1
250

2
250

5
250

10
210

15
200

25
190

30
175

40
162



V1 - Takeoff Decision Speed dry runway
Standard temperature, sea level pressure altitude 90,000 lbs (flaps 5) 96 KIAS
180,000 lbs (flaps 5) 153 KIAS


VR - Rotation Speed dry runway
Standard temperature, sea level pressure altitude 90,000 lbs (flaps 5) 98 KIAS
180,000 lbs (flaps 5) 156 KIAS

V2 - Minimum Climb Speed dry runway
Standard temperature, sea level pressure altitude 90,000 lbs (flaps 5) 111 KIAS
180,000 lbs (flaps 5) 161 KIAS


VREF - Landing Approach Speed gear down 90,000 lbs (flaps 30) 116 KIAS
90,000 lbs (flaps 40) 165 KIAS

180,000 lbs (flaps 30) 109 KIAS
180,000 (flaps 40) 157 KIAS


NOTE: For explanations of speeds used on this tab, see "V-speeds" in the Learning Center Glossary.

[D. Robert Quick]

Sept 11, 2012 16:29:12 GMT -6 Don Gieseke said:

Sorry, Dave. I hastily read your original post and missed the real question. My bad!!

I am no aeronautical engineer but I'm guessing that just because one a/c has a max landing weight at a certain percentage of max weight that it would apply to all a/c. Lots of things go into determining that mlw that could be totally different from one a/c to another.

I don't know anybody in this group that is an -800 driver but then I sure don't know everybody here. Good luck with getting your answer!!

Oh Don, I fully realize that... I was just using a very low-tech way to guess at it... I realize that it wouldn't be right on the money... just trying to find an aprox. figure to go by... Remember, this is a game sim and is anything but all inclusive...

[Bruce Gorrell]

I suspect the Vref you have quoted is for the max landing weight. So you need the weight for something, or are you just trying to find out how much fuel to use for landing?

Sent from my ADR6350 using proboards

[Bruce Gorrell]

Google is your friend. Max landing weight of the 737-800 is 146,300. Max takeoff weight is listed as 174,200.

Sent from my ADR6350 using proboards

[D. Robert Quick]

Bruce, I really appreciate your reply... Actually that works out to 0.83% of max. takeoff weight... Again, I was just trying to ball park it since the PFD minimums speed tape doesn't function on this... I played around and found out rather quickly what was "too slow" (YIKES) and worked up from there in maybe 10 knot incruments... Some speeds simply didn't work because the pitch-up attitude as too high on final as was the vertical speed and made any attempt at flair WAY too nose high... The final approach speeds that fixed that problem seemed a tad fast, but, realize I have never flown the big iron, and with the exception of the Aerowinx PS 1.3 software ( www.aerowinx.com ) that I use which is professional software, I have zero experience with any jet transport catagory aircraft... I am pretty high time I guess with around 10,000 hours now, but only 3500 of that is in the BE-99 which is nothing more than an underpowered stretch King Air, and much of the rest is crop-dusting and a huge part of it is instructing in vintage tail-draggers, biplanes of all sorts and a few home-builts...