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 10 Power and fuel burn changes (Read 13362 times)
RyanJames170
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Power and fuel burn changes
Nov 29th, 2012 at 8:58pm
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I have been working on some changes to the regular 737 that give it a more realistic feeling power and better fuel burn in cruse and climb

Would any of you be intrested in trying it out?
  
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asanal
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Re: Power and fuel burn changes
Reply #1 - Dec 1st, 2012 at 5:29pm
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Ryan,

Here is my latest test flight.  your figures implimented.

AP: KNGU
Local Conditions: Wind calm, Temp 60F
Rwy" 10 - 8361 Ft
V1-One Data settings : V1 140
TGW : 115021
MGW: 116000

Takeoff: Full Power
EPR: 2.23
Fuel Flow: 7550 Lbs
Static Thrust Settings:14500 Lbs in Aircraft Cfg.
Thrust Specific Fuel Cumsuption : 0.515
Wheels-Off RWY length : 8300 ft
(My previous WHeels -Off RWY 6000ft was incorrect, should be Same around 8300 Ft)
  
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RyanJames170
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Re: Power and fuel burn changes
Reply #2 - Dec 1st, 2012 at 6:09pm
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What flaps where you using, I use 10*

Also the airports elevation will effect that take off run some.

Also grab dutch's FDE fix for the engine serging and tell me about how much RWY you used.

I get off from KHYR ~5001 foot strip with a gross weight of 106,000lbs

Also make sure your trim is set as well
  
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asanal
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Re: Power and fuel burn changes
Reply #3 - Dec 1st, 2012 at 10:11pm
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"I get off from KHYR ~5001 foot strip with a gross weight of 106,000lbs "

I tried the same airport with GW 106,000Lbs, Flaps 10, I used all rwy and cleared the endoff rwy with 10ft high.
THis is not right,
Trim and V1 calculatons done by V1-One and all numbers were correct,


Now I understand why CS used  high Static Thrust Settings. Wink
  
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RyanJames170
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Re: Power and fuel burn changes
Reply #4 - Dec 1st, 2012 at 11:32pm
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actualy if you look at the real charts the 737-200 takes its time getting airborn

the 737-200 with the 14,000lbs engines needs alot of RWY to get its butt off the runway. those are the JT8D-7's 

the JT8D-9 ie 14,500lbs engine is what i have set it to have

there is a reason that the 737-200 advanced was wanted by airlines.

the advanced had thrust ranging from 15,500-17,400lbs of thust plus better flaps and wing

i might see about having brent stolle have a look at the FDE for this plane

im going to dig more on the fuel burn but i am about 99% sure its verry close
  
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asanal
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Re: Power and fuel burn changes
Reply #5 - Dec 2nd, 2012 at 1:11am
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It is intresting I was wondering why I   purchased CS- 737ADV. I just checked Cfg, file and found   CS over powered these engines. Now I can fly to  the moon.
I wonder how   CS selected  static power settings as  25,000Lbs.


[TurbineEngineData]
fuel_flow_gain = 0.002                          //Gain on fuel flow
inlet_area = 19.6                               //Square Feet, engine nacelle inlet area
rated_N2_rpm = 29920                            //RPM, second stage compressor rated value
static_thrust = 25000
afterburner_available = 0                       //Afterburner available?
reverser_available = 1                          //Thrust reverser available?
ThrustSpecificFuelConsumption = 0.385             //Thrust specific fuel consumption (Jets)
AfterBurnThrustSpecificFuelConsumption = 0      //TSFC with afterburn/reheat engaged

Update:
I just made a test flight with 737-200ADV at your AP. with GW 106,000lbs. Used RW  close to 3000Ft.
I told you with this power I can go to the Moon.

http://img692.imageshack.us/img692/9951/khyrl.jpg
  
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marvic
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Re: Power and fuel burn changes
Reply #6 - Dec 2nd, 2012 at 1:23am
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RyanJames170 wrote on Dec 1st, 2012 at 11:32pm:
actualy if you look at the real charts the 737-200 takes its time getting airborn

the 737-200 with the 14,000lbs engines needs alot of RWY to get its butt off the runway. those are the JT8D-7's  

the JT8D-9 ie 14,500lbs engine is what i have set it to have

there is a reason that the 737-200 advanced was wanted by airlines.

the advanced had thrust ranging from 15,500-17,400lbs of thust plus better flaps and wing

i might see about having brent stolle have a look at the FDE for this plane

im going to dig more on the fuel burn but i am about 99% sure its verry close

I know one thing for sure, it needs the FDE tweaked. For now set my static thrust to 17400, it's a real dog out of KJAC in the summer but it what it was back then.
  

Cheers, Mark Win7 64bit, i5 2500K 4.2Ghz, Gigabit Z68X-UD4-BE, GSkill 12800 DDR3 8gig ram, GTX960,WD 2t, 250gb SSD, P3Dv3, GSX, REX E. EZDok, Accu-Feel, ORBX,Track IR5, Saitek PRO; Yoke, pedals, Xtra throttles & headset
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RyanJames170
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Re: Power and fuel burn changes
Reply #7 - Dec 2nd, 2012 at 4:23am
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yeah the FDE needs to be tweaked some,

but im glad its the FDE and CFG and not the model that you see though as that is the hardest part to fix 3rd party.

make sure you dile up the fuel flow though to around .51 to .52 as those engines like there fuel lol.

if you wana make it realy fun you can diel the thrust down to 14,000lbs for the JT8D-7 engines lol
  
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RyanJames170
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Re: Power and fuel burn changes
Reply #8 - Dec 2nd, 2012 at 4:33am
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asanal wrote on Dec 2nd, 2012 at 1:11am:
It is intresting I was wondering why I   purchased CS- 737ADV. I just checked Cfg, file and found   CS over powered these engines. Now I can fly to  the moon.
I wonder how   CS selected  static power settings as  25,000Lbs.


[TurbineEngineData]
fuel_flow_gain = 0.002                          //Gain on fuel flow
inlet_area = 19.6                               //Square Feet, engine nacelle inlet area
rated_N2_rpm = 29920                            //RPM, second stage compressor rated value
static_thrust = 25000
afterburner_available = 0                       //Afterburner available?
reverser_available = 1                          //Thrust reverser available?
ThrustSpecificFuelConsumption = 0.385             //Thrust specific fuel consumption (Jets)
AfterBurnThrustSpecificFuelConsumption = 0      //TSFC with afterburn/reheat engaged

Update:
I just made a test flight with 737-200ADV at your AP. with GW 106,000lbs. Used RW  close to 3000Ft.
I told you with this power I can go to the Moon.

http://img692.imageshack.us/img692/9951/khyrl.jpg



yeah its got more of the power levels of the 737NG series witch dont take alot of RWY at low gross weight but those aircraft have gross weights ranging from 144,500-187,500lbs so its alot more then evan the advanced's GW of 128,100lbs so they need the extra thrust. and they also have a max alt some 6,000 feet higher as well

the -200 series was ment for FL280 to FL350 where as the NG is ment from FL340 to FL410

and they also cary a bit more fuel as well close to 10,000-14,000lbs more
  
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asanal
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Re: Power and fuel burn changes
Reply #9 - Dec 2nd, 2012 at 4:45am
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"the advanced had thrust ranging from 15,500-17,400lbs of thust plus better flaps and wing"

CS-737-200ADV static thrust 25,000Lbs. Is it correct  figure? Undecided
  
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RyanJames170
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Re: Power and fuel burn changes
Reply #10 - Dec 2nd, 2012 at 4:46pm
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asanal wrote on Dec 2nd, 2012 at 4:45am:
"the advanced had thrust ranging from 15,500-17,400lbs of thust plus better flaps and wing"

CS-737-200ADV static thrust 25,000Lbs. Is it correct  figure? Undecided


only way 25,000lbs is right is if they have way higher darg then the real aircraft but as you can see from its performance it dose not.
its got the power of a 737-800 but well it weighs alot less lol, the -800 usalt takes off around 140.000-150,000lbs  Cheesy

  
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asanal
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Re: Power and fuel burn changes
Reply #11 - Dec 2nd, 2012 at 5:07pm
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Magic of FSX flying... Grin
  
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RyanJames170
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Re: Power and fuel burn changes
Reply #12 - Dec 2nd, 2012 at 7:15pm
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lol yes.

  
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marvic
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Re: Power and fuel burn changes
Reply #13 - Dec 2nd, 2012 at 10:51pm
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asanal wrote on Dec 2nd, 2012 at 4:45am:
"the advanced had thrust ranging from 15,500-17,400lbs of thust plus better flaps and wing"

CS-737-200ADV static thrust 25,000Lbs. Is it correct  figure? Undecided

So Am I to reset the thrust back to 25000 due to the limitations of FSX?

EDIT...Tried 25k static thrust and went back to 17400 There is NO way that is correct. Here is a thought, maybe CS can finish the 737. And thanks to everyone who is working on it not on the payroll. Sorry for complaining, I was hoping we would have had a service pack by now fixing all the issues and the FDE. I'll go now and sit quietly in the corner and wait. Embarrassed
  

Cheers, Mark Win7 64bit, i5 2500K 4.2Ghz, Gigabit Z68X-UD4-BE, GSkill 12800 DDR3 8gig ram, GTX960,WD 2t, 250gb SSD, P3Dv3, GSX, REX E. EZDok, Accu-Feel, ORBX,Track IR5, Saitek PRO; Yoke, pedals, Xtra throttles & headset
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RyanJames170
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Re: Power and fuel burn changes
Reply #14 - Dec 3rd, 2012 at 12:17am
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It's all good, I just thought I would share what I had come up with so the people who thought it was not right might get a look at sonething diftent, and maybe better,

Hopefuly CS has a relook at the FDE and looks at info on Boeings web sight as they do have a lot of info on there that is free of charge
  
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