Simviation Forum - Aircraft Climbs

Jun 21^st, 2009 at 3:47am

ivormills Offline
Colonel
South West England

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Posts: 180

After take off my aircraft takes on a pitch up attitude until eventually it stalls. Adjusting trim makes no difference as trim constantly goes back. This happens even if the autopilot is set and on all aircraft, any ideas?

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Reply #1 - Jun 21^st, 2009 at 3:56am

Fozzer Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.

Posts: 24861

ivormills wrote on Jun 21^st, 2009 at 3:47am:

After take off my aircraft takes on a pitch up attitude until eventually it stalls. Adjusting trim makes no difference as trim constantly goes back. This happens even if the autopilot is set and on all aircraft, any ideas?

Disconnect your Autopilot, trim the Aircraft for slight nose up, and continue the climb MANUALLY until you reach Cruise height....
...then, after selecting your desired Altitude and Heading, enable the Autopilot.

Always Re-trim the Aircraft after switching off the Autopilot. (When you land, the Trim Wheel may be in the wrong position for the next take-off!...take a peek at the Trim Wheel Indicator before take off!... Wink

...!

Operating the Elevator Trim Wheel is as important as using your Yoke/Joystick..

...(Pilots often fly with one hand on the Trim Wheel during manual flight).. Wink

...!

Paul...G-BPLF...FS 2004...FS Nav... Cool

...!

Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
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Reply #2 - Jun 21^st, 2009 at 4:48am

ivormills Offline
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South West England

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Posts: 180

Thanks Fozzer, I will give it a try.

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Reply #3 - Jun 21^st, 2009 at 4:53am

Fozzer Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.

Posts: 24861

ivormills wrote on Jun 21^st, 2009 at 4:48am:

Thanks Fozzer, I will give it a try.

Excellent, Ivor...

..always check the position of your Trim Wheel, every time, before take off...

...its nearly always in the wrong position!... Grin

...

...!

Paul... Wink

...!

For take-off, trim the nose very slightly high... Wink

...!

Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.

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Reply #4 - Jun 21^st, 2009 at 9:05am

Brett_Henderson Offline
Colonel
EVERY OUTER MARKER SHOULD
BE AN NDB

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After Landing Checklist:

-flaps up
-cowl flaps open
-transponder to stand-by
-landing lights off
-TRIM FOR TAKEOFF

Cheesy

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Reply #5 - Jun 21^st, 2009 at 5:00pm

Travis Offline
Colonel
Cannot find REALITY.SYS.
Universe halted.
Dripping Springs, TX

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Quote:

-TRIM FOR TAKEOFF

Shouldn't that be "neutral trim"?

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Reply #6 - Jun 21^st, 2009 at 8:04pm

Brett_Henderson Offline
Colonel
EVERY OUTER MARKER SHOULD
BE AN NDB

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Posts: 3593

Travis wrote on Jun 21^st, 2009 at 5:00pm:

Quote:

-TRIM FOR TAKEOFF

Shouldn't that be "neutral trim"?

In theory, yes.. and in theory, neutral trim would be takeoff trim.. but that also supposes the theory that the trim indicator is accurate.. and since you just flew the plane, you know where takeoff trim lies.. and your best guess at neutral trim might not even be close.. and the whole thing is redundant, because the next pilot's takeoff checklist will include, "trim for takeoff".. so all you're really doing is trying to stick to the life-saving script.. and since, right after tkeoff, I always tap the brakes, and say, "gear up", while reaching for the imaginary gear lever on the Warrior's panel... and...

Roll Eyes

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Reply #7 - Jun 21^st, 2009 at 11:37pm

Kevin Jarvis Offline
Colonel
Morgan Co Illinois, USA, Earth

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Posts: 292

Maybe the autopilot VSI is set too high.

I fly

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Reply #8 - Jun 24^th, 2009 at 7:08pm

DaveSims Offline
Colonel
Clear Lake, Iowa

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Posts: 2453

Brett_Henderson wrote on Jun 21^st, 2009 at 8:04pm:

Travis wrote on Jun 21^st, 2009 at 5:00pm:

Quote:

-TRIM FOR TAKEOFF

Shouldn't that be "neutral trim"?

In theory, yes.. and in theory, neutral trim would be takeoff trim.. but that also supposes the theory that the trim indicator is accurate.. and since you just flew the plane, you know where takeoff trim lies.. and your best guess at neutral trim might not even be close.. and the whole thing is redundant, because the next pilot's takeoff checklist will include, "trim for takeoff".. so all you're really doing is trying to stick to the life-saving script.. and since, right after tkeoff, I always tap the brakes, and say, "gear up", while reaching for the imaginary gear lever on the Warrior's panel... and...

Roll Eyes

Kinda like a GUMPS check before landing in an Archer

Gas - on a good tank
Undercarriage - Welded down
Mixture - Full rich
Prop - Still spinning
Slats/Flaps - Extended

Dave

www.flymcw.com

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Reply #9 - Jun 24^th, 2009 at 7:32pm

Fozzer Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.

Posts: 24861

On my GA Piston Props I generally trim the nose slightly high, before take-off*, (rather than "Neutral")...

I find that the aircraft will then (almost) lift itself off the runway automatically when sufficient air speed has been reached...

...!

Relieves the back pressure on the Yoke/Joystick necessary to un-stick the wheels!

Paul...G-BPLF... Cool

...!

* ..and also before landing, to slow the Aircraft down, (especially after cancelling the Autopilot)!

Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.

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Reply #10 - Jun 24^th, 2009 at 9:12pm

jason.govt Offline
Colonel
Fly FS
Auckland, New Zealand

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Posts: 21

check the C of G
it can make that happen

The faster you go, the bigger the mess.

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