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Take-Off Help....Somebody please..

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Could somebody walk me through the take-off procedure when engaging the Auto-pilot under 1,000 AGL...Let me first tell you what I'am currently doing and somebody please tell me if this is correct from an the aircraft systems standpoint:Aircraft GW is approx. 387M lbs at KORD 32L. V2 is 163kts. A/T armed and LNAV armed to proceed straight out on 321mag heading for 15 nm.After reaching VR, I rotate the A/C properly per the F/D and follow it thereby establishing V2+15 and hold until well above 400 feet. I then engage the autopilot somewhere around 600 feet and immediately the MCP shows the V/S pitch mode, however, the speed window engages with the (V2 speed of 163kts) and not my current speed of V2+15 to V2+25 thereabouts....Why is this happening? I thought that the speed window when engaged would automatically indicate the current speed of the a/c which would be approx. 178kts ot 183kts..This is bothering me because the 737NG Autopilot (when engaged) under the same takeoff conditions displays the current indicated airspeed of V2+15 to V2+25 and does not show the V2 speed in the MCP Speed mode window when activating the AP.. Also, the pitch mode automatically goes into FLCHG and will maintain the proper pitch for V2+15 or V2+25 until you bug-up to the Flaps-up speed on the PFD and retract the flaps. Makes things a lot more manageable if this is correct A/P functioning on the 737NG.I know there could be differences between the A/P's of both aircraft and there probably is but, why wouldn't the 767 show the ...current....airspeed of the A/C after the A/P is engaged??? Do you have to bug-up immediately after engagement of the A/P on the 767? It seems it would be easier to hand-fly the 767 up to FL100 and then engage the VNAV etc..Anybody care to take a stab at the above scenario!!Regards,Jack

www.smartcockpit.comlook at their 767 section for takeoff procedures.Gary HayesNo im not a "real" pilot, but I did stay at a Holiday Inn Express last night.P4 3.0ghz w/HT & FSB..GeForce FX 5900 ultra 256MB..1 gig PC3200 DDR RAM..Sound Blaster Audigy w/5.1 THX

Gary Hayes

 

My Youtube
 

No i'm not a "real" pilot, but I did stay at a Holiday Inn Express last night.

Gary,Thanks for the site. I still have questions in regard to the speed and pitch modes involved when I activate the A/P..The site gives you all the pertinent phases of the normal takeoff but does not specifically address the issues that I have outlined in my post as they pertain to V2+15 etc. etc.Regards,Jack

Hi Gremel,I will list here the procedure I follow according to a real world AOM that I have. Be aware though that these procedures may differ slightly from airline to airline.- Once you select N1 thrust on the runway and rotate at Vr maintain a minimum of V2+15 although speeds of V2+15 - V2+25 are normal especially if you are light.- Once airborne and definate climb has been established, gear up.- Select a roll mode as required, LNAV, HDG Select- At 1,000 ft AGL or as required by local procedures select Climb thrust. Select FL CH on the MCP and the command bug will move to current airspeed. Dial your speed bug to VREF30+80 (Your "Clean" Speed").- As aircraft accelerates retract flaps on schedule.- Autopilot may be engaged at any time after selecting FL CH.- Once flaps are up and a minimum of 3,000 ft AGL select VNAV.That's about it for the initial climb. Have fun!

>- At 1,000 ft AGL or as required by local procedures select>Climb thrust. Select FL CH on the MCP and the command bug>will move to current airspeed. Dial your speed bug to>VREF30+80 (Your "Clean" Speed").Just wanted to point out that when you select FLCH, you will automatically get the selected climb thrust (i.e., CLB, CLB1, or CLB2) corresponding to your T/O setting.That is:T/O -> CLBT/O 1 -> CLB1T/O 2 -> CLB2-michael

Thank Michael, I should have been more clear on that. I meant select climb thrust by selecting FL CH.

The 737 NG shows V2 (what you set before TO) until you select an A/P which in TOGA MODE will engage LVL CH automatically and the speed window goes V2+20 knots. Now, if you manually move the speed dial prior to A/P engagement it will also automatically jump +20 on the window. This is exact as the rl aircraft.Best Wishes,[h4]Randy J. Smith[/h4]http://www.rawbw.com/~bdoolin/shinault/Animation1.gifCaution! Not a real pilot, but do play one on TV ;-)AMD 64 3200+ | ASUS KV8 DELUXE | GFORCE 5700 ULTRA @535/1000 | Maxtor 6Y080M0 SATA 80 GIG | 512 DDR 400 | Windows Xp Pro | Windows Xp Pro 64 |

Randy J Smith

Thank you Murh, Micheal & Randy...You have answered all my questions regarding this phase of flight.Regards,JackKGSP

http://www.767.org.uk/go to the operating procedures...this is VERY good infoGary HayesNo im not a "real" pilot, but I did stay at a Holiday Inn Express last night.P4 3.0ghz w/HT & FSB..GeForce FX 5900 ultra 256MB..1 gig PC3200 DDR RAM..Sound Blaster Audigy w/5.1 THX

Gary Hayes

 

My Youtube
 

No i'm not a "real" pilot, but I did stay at a Holiday Inn Express last night.

I'll give you my version:* LNAV / VNAV are not allowed to be armed on the ground on 757/767 (even though they can, you shouldn't do this)* Assuming FLAP5 takeoff, with Vref=140 (!= Vr)* Speed window always to V2 (let's assume V2=145)1. advance N1 to ~ 70%. Once stable -> select N12. Observe the takeoff thrust be set3. at 80 kts a mental callout "eighty knots - checked", observe throttle servos releasing and A/T changing to throttle hold "THR HOLD" on the FMA4. Keep your hands on the throttles until V1 minus 5 kts. At this stage, prepare to take all problems into the air (except in case of severe flight controls problems / aircraft unable to fly)5. Do a mental callout at V1 and at the same time start easing back the yoke so as to start rotating at....6. ... Vr, when the aircraft nose should already be raising 2-3 degrees/second, firmly but carefully7. Do not follow F/D on rotation. Initially pitch for about 17.5 degrees, and follow the airspeed. Airspeed should settle inbetween V2+15 and V2+25 (ie. 160-170 in this case). Do not pitch up to decelerate from > V2+25, but just stop the acceleration where it stops, and keep the pitch there.8. Once pos. rate established (VSI is showing climb, and altimeter is showing increase in altitude) -> Gear up.9. At 400ft AGL engage a lateral mode (either LNAV if feasible straight away, or HDG SEL)10. Climb to acceleration height (with V2+15-25), which is 1000ft AGL (standard Boeing) or 1500ft (some operators, Finnair for example).11. At accel ht, engage a vertical mode (VNAV if feasible or FL CH Vref+80).12. Observe climb thrust to be selected at the same time, and pitch the aircraft nose down to around 10 degrees for acceleration to either straight away to 250kt or Vref+80 (depending on the airfield, situation etc.).13. Once speed has accelerated above Vref+40 (180 here), select FLAPS1.14. Once speed has accelerated above Vref+60 (200 here), select FLAPS UP15. Once a/c is clean, select Gear to OFF position.That's it.Tero

PPL(A)

Hi Tero,"* LNAV / VNAV are not allowed to be armed on the ground on 757/767 "I assume that's a Finnair only procedure?

No.It's because of the Honeywell box. It's Boeing's recommendation that LNAV/VNAV modes be armed and/or engaged only when above 400ft AGL.747 & 777 are entirely different beasts in this regard.Tero

PPL(A)

  • Commercial Member

Interesting!I know Condor (well Thomas Cook) wiill arm LNAV on the ground (but not VNAV). Then again, Condor has a newer software as you can have the TO mode with the AP (not sure about other operators) while with the original glass version of the 767 that was not possible.Anyway, regarding your technique, I guess its specially adapted for MSFS? Because in RL you should never start to pull the yoke prior to Vr as you might end in a tailstrike, especially in a 767-300 that is heavily loaded!Regards,Mark

Mark Foti

Author of aviaworx - https://www.aviaworx.com

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Mark,Nope again :). It's not an FS technique. Finnair 757 fleet chief instructor (who is afaik also 767 type rated of course) told me that the correct way is to start gently easing back the yoke at V1 so that the rotation starts firmly at Vr. He even showed me the correct way to do that, and it worked very well. No tailstrikes. Not for me either.Tero

PPL(A)

Well, what else can we expect from people who don't think twice about putting the wet dishes away in the cupboard to dry. ;-)Seriously: I looked it up in the Boeing training manual and in some other stuff, but it is not mentioned. Kind regards,Stephan Haaswww.lemont.nl/b767flightdeckhttp://www.pic767flyingclub.com/images/sas544.jpg

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