Jump to content

Sign in to follow this  
psolk

sliding

Recommended Posts

I have the Exact same problem, glad to know it isn't just my flying although it could be, you never know... I never have any issues keeping any other planes on the runway but last night for example I landed in a 14 kt crosswind from the west at KEWR. I came in crabbing hard to the left, lined up right over the centerline and released the crab at about 10-15 feet. I then proceeded to touchdown and slide about 5 feet off the right side of the runway despite applying a hard left rudder after touchdown to keep her straight. I had to actually apply left brake to bring it back onto the runway. Very strange indeed but pretty consistent that it only happens with the T7. Feels like you are landing on ice unless you can come in perfectly straight and not have to apply rudder on landing. No auto-rudder enabled either.For me it is the -2LR. Still one of my top 3 planes for FS. I logged alot of hours in my fair T7 already. I was waiting a long time for a good T7 and I am very pleased. Thanks to the entire team.-PaulLiquid CooledAMD 4000 San Diego2 Gigs Kingston Corsair XMS CL2Dual 7800 GTX 24 inch widescreen dual 19 inch LCDRaid-0psolksig.jpg

Share this post


Link to post

Same as well here. I had a 10kt crosswind at SFO, I have rudder pedals and after landing, I began sliding to one side off the runway. I had to start applying rudder and brakes to keep it on the runway. Very odd behavior and mine is with the T7 only as well. The only time it does not want to slide on me is when the winds are either head on or a slight tail wind component. Hopefully the patch will address this issue.

Share this post


Link to post
Guest neiljay6

phew!! I thought i was the only one too having this strange prob.As mentioned it only happens with this aircraft. My guess it has something to do with the air file.

Share this post


Link to post

Funny thing is I didn't want to be the first to say anything as I wasn't sure if it was just my flying :) Glad to hear others see it too...-PaulLiquid CooledAMD 4000 San Diego2 Gigs Kingston Corsair XMS CL2Dual 7800 GTX 24 inch widescreen dual 19 inch LCDRaid-0psolksig.jpg

Share this post


Link to post
Guest pierre974

Same problem here since I "re-installed" the 777 with the fuel planner and the load editor. Quite weird behavior just after touchdown, worst with X-wind...I tried to trim the plane manually and to decrab the nose on touch, but it was still difficult to maintain the aircraft well-centered...Any tip and trick appreciated. Hope for a fix...Best wishes to all 777 pilots :-beerchug

Share this post


Link to post
Guest GW Norris

I too have noticed this problem and It was from day 1 of installing the plane. It is definitely not pilot technique that is causing it.I have had it happen with no wind, just doing pattern practice and no weather. It seems if you just touch the rudder in any direction just before touchdown it will skid sideways up to 45 degrees from the centerline of the runway. Full rudder input to the opposite direction will not even begin to straighten it out. It is very unpredictable as to what direction it will skid and on any given landing it will act normal and not skid. OH well, just another bug to sort out.Gary

Share this post


Link to post

what were you flap settings, approach and touch down speed?

Share this post


Link to post

Scott,This has nothing to do with any of that...I had 24.5 fuel left, flaps 30 Vref 135 so approach speed was Vref +5 touchdown speed of ~125-130. It doesn't make any difference though, it is like landing on ice.-PaulLiquid CooledAMD 4000 San Diego2 Gigs Kingston Corsair XMS CL2Dual 7800 GTX 24 inch widescreen dual 19 inch LCDRaid-0psolksig.jpg

Share this post


Link to post

Wow, I thought it was my technique!!!I only seem to get it pronounced with a crosswind. Zero wind component does not seem to affect it. I have sometiimes found a issue on crosswind takeoffs, even with rudder applied.BestBill

Share this post


Link to post
Guest adameke777

Can you do an experiment and try turning the yaw damper off right before touchdown ? IIRC, it's CTRL+D.Adam

Share this post


Link to post

great point Bill, I forgot about the times I could barely even keep her on the runway on takeoff. And yes, I reset all of my controllers to default sensitivities :)Best,-PaulLiquid CooledAMD 4000 San Diego2 Gigs Kingston Corsair XMS CL2Dual 7800 GTX 24 inch widescreen dual 19 inch LCDRaid-0psolksig.jpg

Share this post


Link to post
Guest FlyinJ

The same thing has happened to me on a few occasions. On my last flight, I had just touched down on rwy 24R at KLAX (using autoland) and when I pressed F2 to apply reverse thrust, the 200LR started to yaw to the left and and found myself applying considerable right rudder to keep her on the runway. Out of sheer panic, I reached over and tapped the 5 key on the numberpad (numlock off) to center the controls and - what-do-you-know! - the yawing stopped and it was a straight and smooth ride down to the high speed exit.

Share this post


Link to post
Guest LAX5x5

Try this, but BACK UP YOUR ORIGINAL AIRCRAFT.CFG FIRST!Replace the contact points 1 and 4 in the aircraft.cfg with:point.1 = 1, -6.76, -20, -18.705, 1574.8, 1, 4.521, 0, 1.91, 2.5, 0.747, 13, 14, 2, 270, 270point.4 = 1, -6.76, 20, -18.705, 1574.8, 2, 4.521, 0, 1.91, 2.5, 0.747, 12.9, 13.9, 3, 270, 270To be clear, it is:point.0(unchanged)point.1(replace)point.2(unchanged)point.3(unchanged)point.4(replace)the rest, unchanged.I think I know what you guys are experiencing, but am not 100% sure it is what I'm thinking of. -Elyedit: These are for the original contact points from PSS, not the modified contacts in the sticky post.

Share this post


Link to post
Guest AAL516

one way to improve technique and the way things work in the real world is to touch-down on the side from which the wind is coming using aileron. you need a few degress of bank in there to counter any yaw movements when landing with a crosswind. then, once the wheels are down, then you take out the correction.

Share this post


Link to post

This problem was noted as soon as the T7 was released. The initial PSS comment was something like " all aircraft have crosswind limits" - and as there were many more problems than this, the matter rested there.However, I agree with the comments above. The T7 APPEARS to be far too sensitive to crosswinds. Try some take-off rolls with a 15 kts crosswind component:By 15 kts, the aircraft is weather-cocking into wind. If you are quick, it can be held with rudder, if you are slow to react, full rudder and differential brake might not hold the aircraft on the runway.As speed increases, the fin becomes effective and the aircraft can be held straight easily on rudder.BUT at about 80 - 90 kts, the aircraft has a tendency to slide bodily with the wind. Again, if you are quick, it can be held with rudder; but if the rudder comes in too slowly, the aircraft will slide off the runway before VR. It is just like hitting a patch of ice or packed snow.As noted above, with practice, the aircraft can be kept straight. But this with a xwind component of only 15 kts. In my experience in other aircraft, xwind should not be a real problem on take off unless the component is 30 kts plus. Does anyone know the take off xwind component limitation for the real 777?John Rooum

Share this post


Link to post

Now tried it on landing with xwinds from 15 - 25 kts using auto and manual landings. In every case auto-ILS was faultless and landed me on the button on the centreline; however, a roll-out in autopilot quickly led to the aircraft gently departing the runway. With a manual landing, it is possible to stay on the runway - but is hard work at 25 kts xwind needing anticipation, full rudder and lots of aileron.The problem here seems to be that, even with spoilers extended, the aircraft is still "flying" at well below 100 kts [ie there is not much weight on the wheels] yet the flight controls have lost effectiveness due to the low speed whilst the wind is affecting the aircraft more than it should once the weight is on the wheels.I appreciate this is not something that PSS is looking at [not in the Sticky] but it might be something that we could kook at in the forum in terms of improving directional stability or the effectiveness of the controls. Unless of course I am wrong and the real 777 handles like this?

Share this post


Link to post
Guest FlyinJ

Found this on the web: "The maximum demonstrated crosswind limitation on a Boeing 777 during the take off and landing is 38 knots (43 mph) and the crosswind guidelines as given by the manufacturer is 45 knots (51 mph) on a dry runway or 40 knots (46 mph) on a wet runway."

Share this post


Link to post

>Scott,>This has nothing to do with any of that...>I had 24.5 fuel left, flaps 30 Vref 135 so approach speed was>Vref +5 touchdown speed of ~125-130. It doesn't make any>difference though, it is like landing on ice.>-PaulThe slower you are on approach, the more angle into the wind you will need. Keep the speed up and lose a flap setting or two. Try it with a Cessna and a good crosswind.

Share this post


Link to post

FlyinJMany thanks for the info - about as I expected.Have now tried tuning the sensitivity and effectiveness of the rudder controls and it makes a big difference. I now have enough control authority to keep on the centreline on take off up to 40 kts xwind component and landings up to 35 kts [not tried 40 yet]. The latter is hard work [but so is a 707 - my only "real" experience in big jets - at a lot less than that].For info - the Auto-ILS worked perfectly on these approaches - up to 12 degrees of drift but kept me right on the centreline until I took over; usually at 100 ft.When the holidays are over and the PSS experts have some spare time, I might ask about the autoland situation - perhaps maintaining the centreline on the rollout is not modelled - indeed does the real 777 have it?John Rooum

Share this post


Link to post
Guest FlyinJ

Hi John.Yes, the real 777 does indeed have the capability of maintaining centerline during rollout after executing a successful autoland and is done using the aircraft's Enhanced Digital Flight Control System. This, of course, is also dependent on the runway's navigation equipment supporting CATIIIb autoland operations. Jeff

Share this post


Link to post
Guest FlyinJ

Good catch, John. I missed that thread. I'm quite surprised that John from PSS said it can't be done. Their 777 for FS2002 performed the rollout on centerline like a champ.Let's hope the fix comes in the patch.Jeff

Share this post


Link to post

This thread has been going for a few days, I am surprised none of the PSS guys have commented.-PaulLiquid CooledAMD 4000 San Diego2 Gigs Kingston Corsair XMS CL2Dual 7800 GTX 24 inch widescreen dual 19 inch LCDRaid-0psolksig.jpg

Share this post


Link to post
Guest neiljay6

hi there!I seem to have a small problem when landing this impressive aircraft. Depending on Wind Direction on short final approach, upon landing onto the runway, the aircraft seem to SLIDE either to the left or right off the runway and partially on the the side apron all depending on what minor adjustments I make Rudder Wise.

Share this post


Link to post
Guest NormanB

James,Yes I did delete your post.In answer to your query, PSS support are only back today, not yesterday as you intimate.The rest is completely incorrect and not support related.

Share this post


Link to post
Sign in to follow this  
×
×
  • Create New...