yashparikh80 Posted January 16, 2016 Share Posted January 16, 2016 I was wondering what to set the 737's Trim to during takeoff and during flight and during landing. I wasn't sure if I should set to 5 during takeoff or something else. Link to comment Share on other sites More sharing options...
mallcott Posted January 16, 2016 Share Posted January 16, 2016 I was wondering what to set the 737's Trim to during takeoff and during flight and during landing. I wasn't sure if I should set to 5 during takeoff or something else. You set it to what is right for the CG and weight of the aircraft you are flying, the take-off configuration you will be using and the limits contained in the manual? Trim is a consequence of other things, not a constant. Link to comment Share on other sites More sharing options...
PhantomTweak Posted January 16, 2016 Share Posted January 16, 2016 Should be in the checklists someplace. Have you looked to see? Pat☺ [sIGPIC][/sIGPIC] Had a thought...then there was the smell of something burning, and sparks, and then a big fire, and then the lights went out! I guess I better not do that again! Sgt, USMC, 10 years proud service, Inactive reserve now :D Link to comment Share on other sites More sharing options...
yashparikh80 Posted January 16, 2016 Author Share Posted January 16, 2016 Do you have a link to a good 737 checklist? Link to comment Share on other sites More sharing options...
il88pp Posted January 16, 2016 Share Posted January 16, 2016 I haven't got it to hand, but I think the checklist says: Trim: -- As Required. ~it depends on aircraft weight (load), flap setting, runway length, and more. [sIGPIC][/sIGPIC] Link to comment Share on other sites More sharing options...
PhantomTweak Posted January 16, 2016 Share Posted January 16, 2016 Nope, I don't fly the tubes. But THIS PDF might give you what you need, maybe... Pat☺ [sIGPIC][/sIGPIC] Had a thought...then there was the smell of something burning, and sparks, and then a big fire, and then the lights went out! I guess I better not do that again! Sgt, USMC, 10 years proud service, Inactive reserve now :D Link to comment Share on other sites More sharing options...
yashparikh80 Posted January 16, 2016 Author Share Posted January 16, 2016 Oh okay, thank you for the help! Link to comment Share on other sites More sharing options...
MBKHOU Posted January 17, 2016 Share Posted January 17, 2016 The default 737 does not have an FMC so you can't see the TAKEOFF REF page. The trim will vary to load, CG, etc.. So there is no one trim setting for all scenarios. But 5 would likely be a fairly close average.. Maybe a little more for a wide load. I see from appx 4.5 all the way to around 6 just depending. I'd say most often with a normal nearly full load, usually around 5.5-5.6 or so. ?? Kinda hard to trim as required when there is no way to find out what it should be in the default jet. :( Link to comment Share on other sites More sharing options...
napamule2 Posted January 17, 2016 Share Posted January 17, 2016 Quote: '..there is no way to find out what it should be..' Well, you know you will still NEED + pitch trim to take off and to land. During flight you let the AP Alt Hold automatically set the pitch trim. But that might be a negative pitch trim. So when you deactivate the AP be sure to check vertical speed for clues and be ready to input some + pitch trim (which you were going to use anyway for landing). Too much is better than not enough IMO. Chuck B i7 2600K @ 3.4 Ghz (Turbo-Boost to 3.877 Ghz), Asus P8H67 Pro, Super Talent 8 Gb DDR3/1333 Dual Channel, XFX Radeon R7-360B 2Gb DDR5, Corsair 650 W PSU, Dell 23 in (2048x1152), Windows7 Pro 64 bit, MS Sidewinder Precision 2 Joy, Logitech K-360 wireless KB & Mouse, Targus PAUK10U USB Keypad for Throttle (F1 to F4)/Spoiler/Tailhook/Wing Fold/Pitch Trim/Parking Brake/Snap to 2D Panel/View Change. Installed on 250 Gb (D:). FS9 and FSX Acceleration (locked at 30 FPS). Link to comment Share on other sites More sharing options...
MBKHOU Posted January 17, 2016 Share Posted January 17, 2016 Quote: '..there is no way to find out what it should be..' Well, you know you will still NEED + pitch trim to take off and to land. During flight you let the AP Alt Hold automatically set the pitch trim. But that might be a negative pitch trim. So when you deactivate the AP be sure to check vertical speed for clues and be ready to input some + pitch trim (which you were going to use anyway for landing). Too much is better than not enough IMO. Chuck B Yep, but it's only really critical as far as the takeoff. Landing, you will know by feel alone if the trim is right or not, same as any other plane. So no worries on landing. I never set a certain "landing trim setting" before landing. But takeoff is a bit different. The trim is more critical on takeoff due to having no way to feel if it's right or not. And it needs to be fairly close if one is going to engage the A/P soon after takeoff. You might, or you might not.. Just depends how you are flying. But say you are going to go to LNAV/VNAV soon after takeoff.. You can legally engage at 400 ft AGL. The trim has to be right or else you won't be able to release pressure from the yoke. You can't engage the A/P if there is yoke pressure. I guess you could trim it out before you engage, but that's not really the way you want to do it. You want to be properly trimmed on the initial climb out so you can just release pressure on the yoke and engage in a quick one-two motion. And if hand flying it out, no massive trim changes will be required on the climb out. Link to comment Share on other sites More sharing options...
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