Simviation Forum - Unstick problem

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Unstick problem (Read 1071 times)

Dec 22^nd, 2009 at 4:48pm

RAFAIR100 Offline
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I love YaBB 1G - SP1!

Posts: 217

Some time ago, I read a tip which detailed the parameter to 'tweak' in order to get an aircraft to unstick at roughly the correct speed. Can anyone give me a reference? I have one just now which doesn't look like it would ever unstick regardless of how much 'up' elevator and/or 'up' trim is applied. They just don't build runways long enough!

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Reply #1 - Dec 22^nd, 2009 at 9:33pm

BSW727 Offline
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I've never heard of that. Mine unsticks fine as long as I've done the calculations correctly.

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Reply #2 - Dec 23^rd, 2009 at 5:57pm

Capt.Propwash Offline
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on the tires!
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did you tell the FAT@$$ back in 23B to get off the plane?? that might be the problem.

also, are you trying to take off with 100% fuel and an overload of luggage?

The thoughts and expressions contained in the post above are solely my own, and not necessarily those of Simviation.com, its Moderators, its Staff, its Members, or other guests. They can not, are not, and will not be held liable for any thoughts, or expressions, or posts that I have made, or will make in the future.

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Reply #3 - Dec 24^th, 2009 at 1:04am

Romflyer Offline
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Make sure your auto pilot is off Shocked

Shocked

before you start your take-off roll

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Reply #4 - Dec 24^th, 2009 at 1:55am

garryrussell Offline
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Might help if you tell us what it is Cheesy

Cheesy

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Reply #5 - Dec 24^th, 2009 at 9:45am

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

Posts: 24861

Romflyer wrote on Dec 24^th, 2009 at 1:04am:

Make sure your auto pilot is off Shocked

Shocked

before you start your take-off roll

...and don't forget to manually trim the Aircraft correctly for take-off.....Take a peek at your Elevator Trim Wheel setting.... Wink

Wink

....

Wink

....!

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

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 #6 - Dec 24^th, 2009 at 11:58am

olderndirt Offline
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Flying is PFM
Rochester, WA

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[quote author=RAFAIR100 link=1261518493/0#0 date=1261518493]Some time ago, I read a tip which detailed the parameter to 'tweak' in order to get an aircraft to unstick at roughly the correct speed. Can anyone give me a reference? I have one just now which doesn't look like it would ever unstick regardless of how much 'up' elevator and/or 'up' trim is applied. They just don't build runways long enough![/quote]If the nose doesn't start up where you're expecting, try another notch of flap as you're rolling to make it pitch up.

THIS IS NOT A PANAM CLIPPER

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Reply #7 - Dec 24^th, 2009 at 1:02pm

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

Posts: 24861

My technique for quickly "unsticking" in my GA Piston Props, is to spin the Elevator Trim Wheel for a slight "nose-up" position, accelerate smoothly down the runway, and then apply one notch of Flap once up to speed...

This is often enough to catapult the Aircraft into the air, and climb all by itself, without any further assistance from me!...

...!

(Just remember to cancel the Flap(s) once in the Cruise).

Excellent technique for short-field take-offs!... Kiss

Kiss

...!

Paul...G-BPLF....FS 2004...

...!

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 #8 - Dec 24^th, 2009 at 6:42pm

olderndirt Offline
Colonel
Flying is PFM
Rochester, WA

Gender:
Posts: 3574

Fozzer wrote on Dec 24^th, 2009 at 1:02pm:

My technique for quickly "unsticking" in my GA Piston Props, is to spin the Elevator Trim Wheel for a slight "nose-up" position, accelerate smoothly down the runway, and then apply one notch of Flap once up to speed...

This is often enough to catapult the Aircraft into the air, and climb all by itself, without any further assistance from me!...

...!

(Just remember to cancel the Flap(s) once in the Cruise).

Excellent technique for short-field take-offs!... Kiss

Kiss

...!

Paul...G-BPLF....FS 2004...

...!

Sounding more like a bush pilot all the time. All you need is a tailwheel and you're all set

.

THIS IS NOT A PANAM CLIPPER

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Reply #9 - Dec 24^th, 2009 at 7:08pm

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

Posts: 24861

olderndirt wrote on Dec 24^th, 2009 at 6:42pm:

Fozzer wrote on Dec 24^th, 2009 at 1:02pm:

My technique for quickly "unsticking" in my GA Piston Props, is to spin the Elevator Trim Wheel for a slight "nose-up" position, accelerate smoothly down the runway, and then apply one notch of Flap once up to speed...

This is often enough to catapult the Aircraft into the air, and climb all by itself, without any further assistance from me!...

...!

(Just remember to cancel the Flap(s) once in the Cruise).

Excellent technique for short-field take-offs!... Kiss

Kiss

...!

Paul...G-BPLF....FS 2004...

...!

Sounding more like a bush pilot all the time. All you need is a tailwheel and you're all set

.

.....

Grin

....!

.....a Cessna 150/152 Tail Dragger!.... Smiley

....that's ma Boy!...!

Paul...G-BPLF....FS 2004....C150.... Cool

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!.... ...!
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 - Dec 25^th, 2009 at 11:15am

olderndirt Offline
Colonel
Flying is PFM
Rochester, WA

Gender:
Posts: 3574

Fozzer wrote on Dec 24^th, 2009 at 7:08pm:

olderndirt wrote on Dec 24^th, 2009 at 6:42pm:

Fozzer wrote on Dec 24^th, 2009 at 1:02pm:

My technique for quickly "unsticking" in my GA Piston Props, is to spin the Elevator Trim Wheel for a slight "nose-up" position, accelerate smoothly down the runway, and then apply one notch of Flap once up to speed...

This is often enough to catapult the Aircraft into the air, and climb all by itself, without any further assistance from me!...

...!

(Just remember to cancel the Flap(s) once in the Cruise).

Excellent technique for short-field take-offs!... Kiss

Kiss

...!

Paul...G-BPLF....FS 2004...

...!

Sounding more like a bush pilot all the time. All you need is a tailwheel and you're all set

.

.....

Grin

....!

.....a Cessna 150/152 Tail Dragger!.... Smiley

....that's ma Boy!...!

Paul...G-BPLF....FS 2004....C150.... Cool

Cool

...!

With an O-320/150hp - what a two place - almost as lively as your bike

THIS IS NOT A PANAM CLIPPER

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Reply #11 - Dec 26^th, 2009 at 1:42pm

RAFAIR100 Offline
Colonel
I love YaBB 1G - SP1!

Posts: 217

Thanks to all who took the trouble to reply. Very interesting. Unfortunately, none told me where I might find the tip I referred to.

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Reply #12 - Dec 26^th, 2009 at 2:24pm

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

Posts: 24861

[quote author=RAFAIR100 link=1261518493/11#11 date=1261852943]Thanks to all who took the trouble to reply. Very interesting. Unfortunately, none told me where I might find the tip I referred to.[/quote]

Which is the one and only Aeroplane that you are having trouble with?

...link to the Download...so that we can try it out, for any errors in the design...;)...!

Paul...G-BPLF...FS 2004.... 8-)...!

« Last Edit: Dec 26^th, 2009 at 6:17pm by Fozzer »

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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 #13 - Dec 26^th, 2009 at 4:37pm

olderndirt Offline
Colonel
Flying is PFM
Rochester, WA

Gender:
Posts: 3574

[quote author=RAFAIR100 link=1261518493/11#11 date=1261852943]Unfortunately, none told me where I might find the tip I referred to.[/quote]If it's not rotating at the calculated distance down the runway and your numbers are all good, it sounds like a CG problem and one of our more enlightened members can probably provide the fix.

THIS IS NOT A PANAM CLIPPER

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Reply #14 - Dec 27^th, 2009 at 2:12pm

Romflyer Offline
Colonel
Hello!
Canada

Gender:
Posts: 365

[quote author=RAFAIR100 link=1261518493/11#11 date=1261852943]Thanks to all who took the trouble to reply. Very interesting. Unfortunately, none told me where I might find the tip I referred to.[/quote]

Fozzer said it well when he said tell us about the plane you are having problems with.........however
I'm willing to bet money that you are fighting with an auto-pilot that won't let the airplane change elevation, so you are "stuck" at airport altitude, and no matter how much you pull on the stick, or trim on the trim, the auto-pilot says is holding your current altitude. So you need to ensure that the AP is off, then check that your trim is set to take-off (usually around 0,or +1) set flaps if required, then push forward on your throttle, wait for V2 and rotate......I bet that you will no longer be "stuck" on the runway.

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