Jim Posted March 8, 2013 Report Posted March 8, 2013 I watched Adam's video and noticed he landed right wheel first. I land level with a passenger, but aways right wheel first when flying solo. I always have to change or rotate the right tire before the left one. Anyone else notice this?
Ed Cesnalis Posted March 8, 2013 Report Posted March 8, 2013 I land level unless I am controlling drift and then I land on the upwind wheel. It doesn't matter if I am solo or not it only matters if there is drift to control. You should touch down one wheel at a time due to a crosswind but you can also land first on the forward wheel if you are in a crab. The crab can be slight and hard to detect in a CT but if the landing happens on the right wheel then a little pivot to the right and then the left wheel contacts you are probably landing in a crab. If you land one wheel at a time due to a crosswind ( and you are aligned ) there should be no pivot.
coppercity Posted March 8, 2013 Report Posted March 8, 2013 People tend to land with a left crab in the CT (with no wind) due to the sight picture from the left seat, right wing down corrects for the slight left drift caused by this sight picture issue. If the centerline doesnt look like it is parallel to ridgeline in the top of the instrument panel and the center GPS antenna appears well right of centerline then your landing crooked.
Ed Cesnalis Posted March 8, 2013 Report Posted March 8, 2013 It still must spin a wheel from a dead stop to 100+ mph and there has to be some weight transfer from the wings to the wheels and legs. Well there's your problem right there Roger, 100mph is too fast, try touching down at stall speed To summarize it sounds like you are advocating doing less damage to one gear by spreading out the damage to both or even all three. I say keep it simple and avoid the damage. Don't use a 1 point vs 2 point vs 3 point landing as your target. Targets: track the center line touch down aligned control your sink If you do those things you won't side load, you will contact the upwind wheel 1st, you won't land hard.
FastEddieB Posted March 9, 2013 Report Posted March 9, 2013 I used to own a couple Citabrias at different times. On wheel landings, I found myself doing something that was either a bad habit or an effective tool. The gear on the Citabria is undamped and VERY springy. You have to be fast with slight forward pressure to hold the plane on when it touches without bouncing. I found that wheel landings were MUCH easier for me if I rolled one wheel on first. Without a crosswind, I still found rolling on the right wheel first made the plane much less likely to bounce. Why right? As an instructor, I had gotten used to looking out to the right when landing in general. From the back seat of a Citabria, you absolutely have to look out one side or the other to see anything, and looking out the right remained my habit. I don't know if being right-handed had anything to do with anything or not, but rolling the right wheel on first felt much more natural to me. Not advocating this, though it did help me. Probably only peripherally related to this thread's topic.
Jim Meade Posted March 9, 2013 Report Posted March 9, 2013 We should all be able to consistently and smoothly land in a steady cross wind on the upwind wheel. If we don't, we introduce a side load. There is no alternative because if the wing is not turning into the wind and rudder holding the nose straight down the runway, the airplane is drifting downwind, creating a sideload. I hear you on wheel landing a Citabria, Eddie, I've done it but won't brag about my skill in that regard. It sounds like you landed slightly tail low, based on your inferred blocked vision. I always landed with the tail pretty high - at least level, and from the front seat, so I had a different view.
Jim Posted March 9, 2013 Author Report Posted March 9, 2013 Lots of replies, but not in the direction I wanted to go. Let me rephrase the question. If an aircraft is unbalanced laterally, such as it is flying solo, is it possible to track the center line with the wings level. I think the answer is no. Intuitively, I'd think that the pilot's side wheel would have to be low, but that's not what's happening and I'm having an awful time trying to visualize what is.
Ed Cesnalis Posted March 9, 2013 Report Posted March 9, 2013 Lots of replies, but not in the direction I wanted to go. Let me rephrase the question. If an aircraft is unbalanced laterally, such as it is flying solo, is it possible to track the center line with the wings level. I think the answer is no. Intuitively, I'd think that the pilot's side wheel would have to be low, but that's not what's happening and I'm having an awful time trying to visualize what is. Yes Jim it is possible to track the center line with wings level. The tail must be directly behind the nose. because crabbing will initiate drifting when wings are level. If you have a low pilot side wheel / wing it will create a drift to the left due to the lateral component of the wings lift and will need to be countered with opposite rudder creating an unwanted crab.
FastEddieB Posted March 9, 2013 Report Posted March 9, 2013 If an aircraft is unbalanced laterally, such as it is flying solo, is it possible to track the center line with the wings level. I think the answer is no. Why? A tiny bit of down aileron on the "heavy" side will keep the wings level throughout the landing. I suppose there may be a tiny amount of yaw created due to the increased induced drag on that side, but if so its so tiny I've never noticed it. Edited to add: I think the last three posts were all composed simultaneously!
Jim Meade Posted March 9, 2013 Report Posted March 9, 2013 If you touch down at a fast enough speed the relative wind is all on the nose - there is no apparent crosswind.
Adam Posted March 9, 2013 Report Posted March 9, 2013 I watched Adam's video and noticed he landed right wheel first. I land level with a passenger, but aways right wheel first when flying solo. I always have to change or rotate the right tire before the left one. Anyone else notice this? Any landing I make and don't kill myself is a good landing... Catalina is always a fun landing in a light sport... there is typically a nice ocean breeze (nothing between Catalina and Hawaii to stop it) and the winds are usually swirling just a bit on the runway ends. People crash here every year, downward wind gusts have been known to push people down below the runway on a low approach, some people get confused by a crown in the runway, land and think they dont have enough space to stop and over brake and either nose over or lose control. I am not an expert pilot by any means, I'm a relatively low hour rookie, but in remembering the day I was being pushed pretty hard to the left and was dipping the right wing in an attempt to keep centered. Catalina was recently featured in one of the monthly aviation magazines as one of the top 10 "fun and challenging" airports to land at. The cliffs are pretty steep, runway sits chisled at 1601 ft above the Pacific. On a no wind day I'm usually pretty good at staying on the center line. Of course the other explanation is I just sucked that day... In which case I revert to my first sentence, any landing I make and don't kill myself is a good landing
FastEddieB Posted March 9, 2013 Report Posted March 9, 2013 A tiny bit of down aileron on the "heavy" side will keep the wings level throughout the landing. I think I need to clarify. I DO always strive to land wing low into the wind, necessitating a landing on the upswind wheel first. The only way to land on the mains at the same time in a crosswind is to either... ...land in a crab, or... ...kick the plane straight at the last moment so as to land flat but before the plane begins to drift. The first makes me cringe, and the timing of the second seems to give both me and my students problems. But whatever works! Roger, I'd love to see a YouTube video of you landing level in a strong crosswind to analyze exactly how you're doing it. Do you have one?
Ed Cesnalis Posted March 9, 2013 Report Posted March 9, 2013 ...kick the plane straight at the last moment so as to land flat but before the plane begins to drift. Eddie, Is there a point in time after the aircraft is 'kicked straight' and before it begins to drift? I say no there isn't, the wind was already blowing across the runway so you were already drifting but countered by the crab angle. Once you are strait you are still drifting but no longer countering it. If you replace the crab with a low wing then you could maintain the center-line without drift while you touch down otherwise the side-load is present.
FastEddieB Posted March 9, 2013 Report Posted March 9, 2013 Eddie, Is there a point in time after the aircraft is 'kicked straight' and before it begins to drift? I think there is - the plane has a certain amount of inertia, so it takes a moment to begin to drift. I think. Let's see if YouTube in my friend.
FastEddieB Posted March 9, 2013 Report Posted March 9, 2013 YouTube IS my friend... I just watched the first landing so far, but I think it makes my point. My guess is that if Roger manages to touch down wings level in a crosswind, it's got to be a variation on this theme.
Jim Meade Posted March 9, 2013 Report Posted March 9, 2013 Seven is a good example of how not to do a crab-kickout landing. He started the kickout at about the right height, but as the nose was coming around the upwind wing was going faster and generated a little more lift. As a result, it rose and the downwind gear planted first. What we need is to install a device to measure our side loading and then all of us will know exactly what our landings are doing. Anyone know of anything that will do that inexpensively?
knolde Posted March 10, 2013 Report Posted March 10, 2013 Interesting, I never have thought about it. I agree with Charlie Tango and Roger that on landing you spread the wealth--land on the mains. I guess one of the reasons I really like reading this fourm is that I find myself thinking about new things. For example, I do not ever remember thinking about landing with a passinger or specifically landing on one wheel. I consentrate on the centerline, drift killed, and being level when touching down. Certainly, in a stiff crosswind landing on one wheel is often the way in, but for the most part I must agree with Roger about spreading the impact of landing out--so I really try for the mains to ensure that, in the event that there a down draft or the gust just quits, the plane comes down on the mains to distribute the shock loading. Thanks for the brain cell activation. Dr, Ken Nolde, N840KN
FastEddieB Posted March 10, 2013 Report Posted March 10, 2013 As a reminder, here's the official take on it (from the Airplane Flying Handbook): CROSSWIND ROUNDOUT (FLARE) Generally, the roundout can be made like a normal landing approach, but the application of a crosswind correction is continued as necessary to prevent drifting. Since the airspeed decreases as the roundout progresses, the flight controls gradually become less effective. As a result, the crosswind correction being held will become inadequate. When using the wing- low method, it is necessary to gradually increase the deflection of the rudder and ailerons to maintain the proper amount of drift correction. Do not level the wings; keep the upwind wing down throughout the roundout. If the wings are leveled, the airplane will begin drifting and the touchdown will occur while drifting. Remember, the primary objective is to land the airplane without subjecting it to any side loads that result from touching down while drifting. CROSSWIND TOUCHDOWN If the crab method of drift correction has been used throughout the final approach and roundout, the crab must be removed the instant before touchdown by applying rudder to align the airplane’s longitudinal axis with its direction of movement. This requires timely and accurate action. Failure to accomplish this will result in severe side loads being imposed on the landing gear. If the wing-low method is used, the crosswind correction (aileron into the wind and opposite rudder) should be maintained throughout the roundout, and the touchdown made on the upwind main wheel. During gusty or high wind conditions, prompt adjustments must be made in the crosswind correction to assure that the airplane does not drift as the airplane touches down. Comment to follow...
FastEddieB Posted March 10, 2013 Report Posted March 10, 2013 Comment... For me the key is this, regarding the crab method: "This requires timely and accurate action. Failure to accomplish this will result in severe side loads being imposed on the landing gear." And my experience is that pilots have trouble getting the timing right. I know I do. When the upwind wheel is rolled on first, there is no unusual load on it if the plane isn't drifting. And if the plane IS drifting, landing flat will not spare the gear the "severe side loads" referenced above. But use whatever works for you - I know what works best for me!
FastEddieB Posted March 10, 2013 Report Posted March 10, 2013 Poor technique can lead to damaged components no matter which technique you use. I've been doing and teaching "wing down/one wheel first" landings for a long, long time and have never damaged a wheel. The two methods are each viable, at least if you don't have low mounted engines out on the wings. You can see in the video I posted that even experienced jet pilots can have trouble with the timing involved in landing straight before the plane drifts. But they don't have the option of "wing low", and winds of the magnitude shown in the video are probably rare and would test any pilot's skill. I actually don't think I could jump in a tailwheel airplane and manage a wings level wheel landing. If it counts for anything I have about 1,500 hours of tailwheel time, much of it instructing, all of it "wing down method". Yet to see a damaged wheel and I've yet to fall victim to a fully developed ground loop*. Again, Roger, next time you go up on a crosswindy day I'd love to see a video that shows the gear of your plane on landing - not to find fault but to analyze how you do it. *I say "fully developed" because I did have a student manage to get a swerve going that was big enough to take us off the runway and into the berry bushes at Opa Locka West back in the day. No damage, but we did have berry stains on the belly that had to be cleaned off!
FastEddieB Posted March 10, 2013 Report Posted March 10, 2013 Came across this video, showing pretty much how I would do a crosswind wheel landing in a taildragger: I might be a little more aggressive keeping the tail up after the landing - I like the tail either up or down - there be dragons in between!
Adam Posted March 10, 2013 Report Posted March 10, 2013 I can't imagine anyone still flying an SW without the Matco wheel upgrade... I figured by now everyone would have visited Roger (in the west) for an upgrade! (or Tad in the East) I'm a craber in a low wing, a wing dipper in a high wing. Something not yet discussed is the fact that the CT has a steerable nose wheel tied to the rudder pedals. When crabbing, your nose wheel on low final is not pointed straight down the runway until you kick out the crab. Works fine as long as you kick the crab out before the front wheel touches down. I think provided technique is good, either method works just fine, its a case of when technique is poor or something else happens you get the old "pilot failed to maintain directional control..." NTSB statement :wacko:
Ed Cesnalis Posted March 10, 2013 Report Posted March 10, 2013 I can't imagine anyone still flying an SW without the Matco wheel upgrade... I figured by now everyone would have visited Roger (in the west) for an upgrade! (or Tad in the East)... I'm still on my original brakes, on my early 2006 CTSW.
FastEddieB Posted March 10, 2013 Report Posted March 10, 2013 Marc Inegno (sp?) wheels and brakes on the Sky Arrow, operating at about the same weight as the CT. Even with a free-castoring nosewheel, which uses a bit more brakes for steering, original brakes from 2007 and about 400 hours. And wheels still in one piece... ...so far!
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