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Yawing (Read 14391 times)

Colvale Senior Member Offline Posts: 253 Joined: Jun 23^rd, 2011 Gender:	Yawing Jan 28^th, 2015 at 4:35pm	Print Post
	Just had my first flight after almost a 2-year absence. How do I stop it yawing left-right when in climb using AP?


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Mustang1977 Full Member Offline Posts: 150 Location: Austria Joined: May 27^th, 2014 Gender:	Re: Yawing Reply #1 - Jan 28^th, 2015 at 8:00pm	Print Post
	Greetings, This should only occur on higher altitudes and higher Gross Weights. To eliminate this, open the aircraft.cfg and go to the section [flight_tuning] Increase the value of roll_stability=1.0 to 1.5


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Colvale Senior Member Offline Posts: 253 Joined: Jun 23^rd, 2011 Gender:	Re: Yawing Reply #2 - Jan 28^th, 2015 at 8:27pm	Print Post
	Greetings, Mustang1972(hope that refers to that beautiful car?) Thanks for that.I was only doing a test flight to Poland, and had laden with full fuel, but I could barely climb and was at under 10k when it started. Will do. EDIT: Do not have that entry in the 707-300C aircraft.cfg.


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Markoz CS Team Offline Posts: 12364 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: Yawing Reply #3 - Jan 29^th, 2015 at 5:20am	Print Post
	Colvale wrote on Jan 28^th, 2015 at 8:27pm: Greetings, Mustang1972(hope that refers to that beautiful car?) Thanks for that.I was only doing a test flight to Poland, and had laden with full fuel, but I could barely climb and was at under 10k when it started. Will do. EDIT: Do not have that entry in the 707-300C aircraft.cfg. This is from my 707-300C aircraft.cfg: [flight_tuning] cruise_lift_scalar=1.000 pitch_stability=1.000 roll_stability=1.000 yaw_stability=1.000 parasite_drag_scalar=1.000 induced_drag_scalar=1.000 elevator_effectiveness=1.000 aileron_effectiveness=1.000 rudder_effectiveness=1.000 elevator_trim_effectiveness=1.000 aileron_trim_effectiveness=1.000 rudder_trim_effectiveness=1.000 So it should be there!

	Mark Fletcher PC: i7 10700K @3.8/5.1GHz \| 64GB DDR4 3200 \| 12GB RTX 4070 Super \| 32" LCD Monitor \| 1TB SSD & 2x2TB SSD \| Win 11 Pro - FSX/FSX-SE/P3D3/P3D4/P3D5/P3D6/MSFS2020 15.6" Gaming Laptop: i7 7700HQ \| 32GB DDR4 \| 6GB GTX 1060 \| 256GB SSD & 1TB HDD \| Win 10 Pro 64bit - FSX-SE/P3D4
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Colvale Senior Member Offline Posts: 253 Joined: Jun 23^rd, 2011 Gender:	Re: Yawing Reply #4 - Jan 29^th, 2015 at 7:49am	Print Post
	Found it. Thanks, Mark.


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Mustang1977 Full Member Offline Posts: 150 Location: Austria Joined: May 27^th, 2014 Gender:	Re: Yawing Reply #5 - Jan 29^th, 2015 at 1:11pm	Print Post
	Colvale wrote on Jan 28^th, 2015 at 8:27pm: Greetings, Mustang1972(hope that refers to that beautiful car?) Hello hello - yes it does, but not only. My first bicycle was a "Mustang" (of course with the lettering and the horse), I guess that was the origin Landing with full fuel could be dangerous, particularly with much payload. I hope you've keep this in mind. PS: Sorry for Doublepost, but there was an error with the Connection.


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Colvale Senior Member Offline Posts: 253 Joined: Jun 23^rd, 2011 Gender:	Re: Yawing Reply #6 - Jan 29^th, 2015 at 1:42pm	Print Post
	Hello Mustang1972 Had never even heard of a bicycle called Mustang before. The 1972 handle immediately gave me a clue it had to be a car(drool, drool!!). As it was only a short circuit to familiarise myself with this plane after having been away from it for 2-3 years, I immediately realised that the fuel load was way too much. Just tried another flight today with 2000kgs each tank for a 900-mile flight to Poland, but could not get any thrust whatsoever on take-off. It just would not lift at all even though the IAS gauge was shown to be increasing. Any ideas? EDIT: Discovered why I had no thrust. The oil pressure in Eng 1+4 were on red light. How do I ensure that the oil pressure is up?


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Mustang1977 Full Member Offline Posts: 150 Location: Austria Joined: May 27^th, 2014 Gender:	Re: Yawing Reply #7 - Jan 29^th, 2015 at 6:21pm	Print Post
	I never had problems with the oil pressure Have you got a constant fuelflow to all engines? Maybe there could also be a problem with the fuelbalance/fuelmanagement. Check the Fuelpanel. I recommend 25 % IN EACH Tank for short flights / testflights. And, of course, this old lady eat runways for breakfast xD - particularly with high GW, there you need 10K Feet Minimum. I've done a start on a 8000 Feet RW with Full Fuelload but very few payload (no wind). It was very close. At the end there are no high obstacles allowed Don't forget to activate the brakes while you push up the pressure to 2.0, then release the brakes.


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Colvale Senior Member Offline Posts: 253 Joined: Jun 23^rd, 2011 Gender:	Re: Yawing Reply #8 - Jan 29^th, 2015 at 6:41pm	Print Post
	I had 29% in each tank, fuel flow switches were all in-line. Was taking off from Rwy 5L at EGCC, which is an International Airport and is replicated exactly by UK2000 scenery, so it was not a lack of Rwy length. Which brakes and which pressure to 2.0? The parking brakes or the Pneumatic Brake?


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Colvale Senior Member Offline Posts: 253 Joined: Jun 23^rd, 2011 Gender:	Re: Yawing Reply #9 - Jan 29^th, 2015 at 10:34pm	Print Post
	I'm baffled with this plane, or the freighter version, -300C. After previous issues with with engines 1+4, or 1+2 not firing up due to a low oil pressure warning, I opted for a engines running scenario and take-off from the runway. No cargo, 30% fuel in each tank, yet I could not climb to cruise despite trimming for 2000fpm, nor could I get a decent cruise speed.Gave up at 13000 and settled at that CL till I descended and completed the flight. I think I'll park this plane in FSX-SE, at least, for a while. BTW, compared to another Forum where they bite your head off for simple things, I must say despite their 'slagging off' this Forum, I find this Forum so helpful.


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Markoz CS Team Offline Posts: 12364 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: Yawing Reply #10 - Jan 30^th, 2015 at 1:57am	Print Post
	Mustang1977 wrote on Jan 29^th, 2015 at 1:11pm: PS: Sorry for Doublepost, but there was an error with the Connection. Just click on the REMOVE button on the first one to remove it. That way you only have a single reply. Colvale wrote on Jan 29^th, 2015 at 10:34pm: I'm baffled with this plane, or the freighter version, -300C. After previous issues with with engines 1+4, or 1+2 not firing up due to a low oil pressure warning, I opted for a engines running scenario and take-off from the runway. No cargo, 30% fuel in each tank, yet I could not climb to cruise despite trimming for 2000fpm, nor could I get a decent cruise speed.Gave up at 13000 and settled at that CL till I descended and completed the flight. I think I'll park this plane in FSX-SE, at least, for a while. BTW, compared to another Forum where they bite your head off for simple things, I must say despite their 'slagging off' this Forum, I find this Forum so helpful. I have no problems with the 707 Captain in FSX-SE! No problems climbing to FL350 (with a gross weight of about 200,000 pounds).

	Mark Fletcher PC: i7 10700K @3.8/5.1GHz \| 64GB DDR4 3200 \| 12GB RTX 4070 Super \| 32" LCD Monitor \| 1TB SSD & 2x2TB SSD \| Win 11 Pro - FSX/FSX-SE/P3D3/P3D4/P3D5/P3D6/MSFS2020 15.6" Gaming Laptop: i7 7700HQ \| 32GB DDR4 \| 6GB GTX 1060 \| 256GB SSD & 1TB HDD \| Win 10 Pro 64bit - FSX-SE/P3D4
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Colvale Senior Member Offline Posts: 253 Joined: Jun 23^rd, 2011 Gender:	Re: Yawing Reply #11 - Jan 30^th, 2015 at 6:44am	Print Post
	How can I attach a screenshot to show my gauges and instruments?


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Colvale Senior Member Offline Posts: 253 Joined: Jun 23^rd, 2011 Gender:	Re: Yawing Reply #12 - Jan 30^th, 2015 at 9:58am	Print Post
	Mark, can you kindly PM me your aircraft.cfg for the -300C? Thanks.


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Mustang1977 Full Member Offline Posts: 150 Location: Austria Joined: May 27^th, 2014 Gender:	Re: Yawing Reply #13 - Jan 30^th, 2015 at 2:03pm	Print Post
	Colvale wrote on Jan 29^th, 2015 at 6:41pm: Which brakes and which pressure to 2.0? The parking brakes or the Pneumatic Brake? The normal brakes with the pedals/default hotkey "," I think. The EPR Pressure, the gauges under the thrust reverser operating lights You can use http://imgur.com for picture upload. Markoz wrote on Jan 30^th, 2015 at 1:57am: Just click on the REMOVE button on the first one to remove it. That way you only have a single reply. Hey cool, just overseen this button. This is the first forum that I've seen with such a function, nice! My Altitude-Record with the 707-300 is 52.000 Ft This is possible with very few fuel and payload of course.


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Colvale Senior Member Offline Posts: 253 Joined: Jun 23^rd, 2011 Gender:	Re: Yawing Reply #14 - Jan 30^th, 2015 at 3:27pm	Print Post
	No idea what is going wrong here with this particular aircraft. First I had issues with the Freighter version not even managing to make 10000ft. Then I tried the pax version, only to see no undercarriage, so uninstalled it from FSX-SE and reinstalled it in FSX-MS. Made another attempt at the same flight-EGCC-EPKK, and as can be seen from the screengrab, same issues of not enough IAS, and an incredulously lethargic climb. http://fsfiles.org/flightsimshotsv2/image/E4l


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