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Up and down like the proverbial (Read 25790 times)

balus Full Member Offline Posts: 53 Location: Townsville, Australia Joined: Mar 30^th, 2007	Up and down like the proverbial Jan 7^th, 2011 at 11:32am	Print Post
	So there I was on climb out of Singapore and the 70 starting bouncing, the yoke in the VC was oscillating backwards and forwards - spot view showed the elevator up and down in full deflection. Now I know I was flying a Qantas livery but I didn't order a kangaroo! I pulled back on my yoke but there was no change - removed mappings in FSUIPC but still no change - ended up having to abort the flight, which is always disappointing. Any ideas as to what caused it?


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balus Full Member Offline Posts: 53 Location: Townsville, Australia Joined: Mar 30^th, 2007	Re: Up and down like the proverbial Reply #1 - Jan 8^th, 2011 at 9:20am	Print Post
	hmmm, so no-one else has experienced this?


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CoolP Senior Member Offline Posts: 2568 Joined: Jan 17^th, 2010 Gender:	Re: Up and down like the proverbial Reply #2 - Jan 9^th, 2011 at 12:15pm	Print Post
	Can you reproduce that flight and the things happening there or was this a one time special? Could well be weather related, if some new data was injected to fast and with abnormal values. It could also happen, if your CG is out of a flyable line, so the fuel load and balance of the plane is important to look at.


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abo265 Full Member Offline Posts: 10 Location: Panama Joined: Oct 20^th, 2006 Gender:	Re: Up and down like the proverbial Reply #3 - Jan 13^th, 2011 at 8:59pm	Print Post
	CoolP: The behavior described by Balus exists. I use the Saitek panels and throttle. Yoke and pedals are ChProducts. It happens on occasions when trimming the airplane, and usually occurs within between 0 and 1500 ft. �rate of climb, negative or positive. If I continue rotating the trim wheel (Saitek wheel or the 707 AP pitch trim wheels) the oscillations dampen and eventually cease. Rotating the wheels in the opposite direction may induce the oscillations again. I have not been able to associate it with any particular flight or flying conditions. Weight and balance do not seem to be a factor. A saved flight may do it on some occasions and not on others. The problem occurs with the original Saitek drivers as well as with the SPAD beta drivers. Windows 7, 36 bit


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Kapitan Full Member Offline Posts: 192 Location: Argentina Joined: Dec 17^th, 2010 Gender:	Re: Up and down like the proverbial Reply #4 - Jan 14^th, 2011 at 10:02am	Print Post
	It doesnt happen in my 707 flights. I believe: a) Either its a joystick drive related problem (dont think so) b) Its the way you are flying the plane. When it happens, are you using autopilot? Ive experienced this effect a few times on other paywares, and it was usually cause I had it configured it incorrectly. K

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balus Full Member Offline Posts: 53 Location: Townsville, Australia Joined: Mar 30^th, 2007	Re: Up and down like the proverbial Reply #5 - Jan 15^th, 2011 at 8:22am	Print Post
	I was flying with AP on at the time - CH yoke and pedals, registered FSUIPC. I was adjusting pitch at the time so perhaps that is the issue - will try it again when I get a chance - unfortunately SP2 for the A300 has just been released so I'll be flying that for the next few days


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Markoz CS Team Offline Posts: 12368 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: Up and down like the proverbial Reply #6 - Jan 15^th, 2011 at 9:49am	Print Post
	balus wrote on Jan 15^th, 2011 at 8:22am: I was flying with AP on at the time - CH yoke and pedals, registered FSUIPC. I was adjusting pitch at the time so perhaps that is the issue - will try it again when I get a chance - unfortunately SP2 for the A300 has just been released so I'll be flying that for the next few days The 707-300 does NOT use FSUIPC. So FSUIPC cannot be the cause of any problems with the 707-300. From Support KB#5937: Q: I have problems with using FSUIPC and your 707 Captain. A: 707 Captain does not use FSUIPC so we do not support any issues with FSUIPC. I'll probably be taking the A300 up for a few flights because of the SP2 update as well. Mark

	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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WKTZ Full Member Offline Posts: 29 Joined: Feb 24^th, 2009	Re: Up and down like the proverbial Reply #7 - Jan 19^th, 2011 at 2:42am	Print Post
	I have the same problem as you Balus...on autopilot and then when you disconnect the A/P, it persists....if you go to external view, the elevators are "flapping" up and down as if they were trying to give the aeroplane some extra boost!


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asanal Senior Member Offline Posts: 522 Location: Flemington,NJ USA Joined: Jul 9^th, 2009 Gender:	Re: Up and down like the proverbial Reply #8 - Jan 19^th, 2011 at 5:57am	Print Post
	It is possible, CH yoke needs calibration. During the climb, A/P on, when elevatosr starts to flapping, Move yoke slowly forward, if is getting worse, then pull yoke slowly toward to you until flapping stops. That is how I solved the same problem


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Capt. Haddock Full Member Offline Posts: 9 Joined: Mar 13^th, 2010	Re: Up and down like the proverbial Reply #9 - Jan 19^th, 2011 at 10:18am	Print Post
	This has happened to me every time I've manually adjusted the trim whilst the AP is engaged, so I guess it's just a feature of the aircraft; I just switch to altitude hold until the 'plane levels out then everything's OK and I can continue with the climb. >^..^<


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Kapitan Full Member Offline Posts: 192 Location: Argentina Joined: Dec 17^th, 2010 Gender:	Re: Up and down like the proverbial Reply #10 - Jan 20^th, 2011 at 12:13am	Print Post
	Capt. Haddock wrote on Jan 19^th, 2011 at 10:18am: This has happened to me every time I've manually adjusted the trim whilst the AP is engaged, so I guess it's just a feature of the aircraft; I just switch to altitude hold until the 'plane levels out then everything's OK and I can continue with the climb. >^..^< Well, there you have the answer then: You should never touch the trim with autopilot engaged...its fighting one against the other. If autopilot is engaged, IT controls-adjusts trim. I can imagine strange thing would happen if you touch the trim with AP engaged, (Ive never even tried it), nor thought someone would, so the bouncing could well be because of that. Another example: Its like switching autopilot altitude hold, and then try and climb or descend..."why would you do that ???" its common sense, (no need for a pilot licence on this one) either its autopilot or manual, if its autopilot..DONT TOUCH stabilizers.

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70747 Full Member Offline Posts: 7 Joined: Jan 13^th, 2011	bouncing plane Reply #11 - Jan 21^st, 2011 at 1:53pm	Print Post
	The 707 bounces on the runway + taxiways, someone posted a fix to the contact points,but the plane still bounces ,is there another fix thankyou.


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Jakobarnholtz Full Member Offline Posts: 71 Joined: Feb 19^th, 2006	Re: bouncing plane Reply #12 - Jan 22^nd, 2011 at 7:10am	Print Post
	It is, like the aircraft has the hickups! I have the same experiense.


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Markoz CS Team Offline Posts: 12368 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: bouncing plane Reply #13 - Jan 22^nd, 2011 at 8:34am	Print Post
	In another reply to a question like this, I said I have not experienced this in FSX. That has not changed. However, I did say that I had experienced it in FS9 (FS2004) at Melbourne, Moorabbin - YMMB. I don't know what the cause of it is. Where (what airport/gate) is this happening? If I start a flight there I can see if it happens to me too. Mark

	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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DarrenL Full Member Offline Posts: 54 Joined: Nov 4^th, 2010	Re: bouncing plane Reply #14 - Jan 22^nd, 2011 at 10:44am	Print Post
	It did happen to me, but the contact point change fixed it. Whenever I changed view, it would bounce as if it had just been placed there.


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