Today's Message Index:
----------------------
 
     1. 02:18 AM - Re: Nose wheel fork failure (Thruster87)
     2. 02:37 AM - Re: Nose wheel fork failure (aussiech650)
     3. 08:10 AM - Re: Re: Nose wheel fork failure (LarryMcFarland)
     4. 08:43 AM - Re: Re: Nose wheel fork failure (Rick Lindstrom)
     5. 08:58 AM - Re: Re: Nose wheel fork failure (jeyoung65@aol.com)
     6. 09:02 AM - Re: Re: Nose wheel fork failure (jeyoung65@aol.com)
     7. 09:09 AM - Re: Re: Nose wheel fork failure (Bryan Martin)
     8. 09:23 AM - Re: Re: Nose wheel fork failure (Rick Lindstrom)
     9. 09:53 AM - Re: Re: Nose wheel fork failure (Paul Mulwitz)
    10. 12:58 PM - Re: [Possible Spam] Re: Re: Nose wheel fork failure (LarryMcFarland)
    11. 04:38 PM - Re: Nose wheel fork failure (Ron Lendon)
    12. 05:05 PM - First Flight (Afterfxllc@aol.com)
    13. 05:20 PM - Re: Re: Nose wheel fork failure (KARL POLIFKA)
    14. 05:38 PM - Re: Nose wheel fork failure (Thruster87)
 
 
 
Message 1
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  | 
      
      
| Subject:  | Re: Nose wheel fork failure | 
      
      
      
      craig(at)craigandjean.com wrote:
      > On the photo of the front gear is that extra stepped rod resting in the V
      > block (below the main cross tube that links to the rudder pedals) your own
      > addition or something from the factory? I'm guessing you had to add it when
      > the cross tube on the factory part didn't reach the V because to the stop
      > plate on the top of the gear. I think I can also see an extra shim fitted
      > into the V of the black nylon part.
      > 
      > -- Craig
      > 
      > --
      It was a mod I did to allow the nose wheel to move more freely.It  has a stainless
      steel rod with phosphor bronze bushes resting on a crom-moly plate bolted
      thru the bearing material for the V.It really made the rudder pedals  free up
      and smooth to operate.As you can see it stayed intact even thro the nose leg tube
      bent. Cheers
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=269310#269310
      
      
Message 2
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  | 
      
      
| Subject:  | Re: Nose wheel fork failure | 
      
      
      Alan, I have an XL601 nose leg that I will not be using. Give me a call if you
      would like it.
      Greg 0415610593.
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=269313#269313
      
      
Message 3
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| Subject:  | Re: Nose wheel fork failure | 
      
      
      Ron,
      That fork has a logical reason for failing and I'm sure it'll reveal 
      itself eventually.
      The steerable linked nose gear is more asset than liability. To be able 
      to steer around potholes and rough fields is
      a major improvement over differential braking. I've experienced both 
      types. For the tail dragger, it's logical, but for tri-gear
      it would be detrimental to add a free-caster nose-wheel to side braking 
      mains. I know it's done in some aircraft, but
      it's a much lesser solution to the steerable nose wheel.
      Curious how the nose wheel steering got sideways far enough to fail the 
      fork. Or it would seem
      there was not enough attention to where the nose wheel was at the time.
      
      Larry McFarland 601HDS at www.macsmachine.com
      
      Ron Lendon wrote:
      >
      > Sorry to hear about that.  
      >
      > I have been considering spring loading the front wheel so it can track separately
      from the rudder.  The front wheel really does need a good caster angle for
      this to work, but I have been thinking about it.
      >
      > --------
      > Ron Lendon, Clinton Township, MI
      > WW Corvair with Roy's Garage 5th bearing
      > Zodiac XL, ScrapBuilder ;-)
      > http://www.mykitlog.com/rlendon
      > Corvair Engine Prints:
      > http://home.comcast.net/~rlendon/site/
      >
      >
      >   
      
      
Message 4
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  | 
      
      
| Subject:  | Re: Nose wheel fork failure | 
      
      
      Not to pick a fight here, Larry, but after flying close to 5000 hours in Grumman
      American airplanes with free castering nose gear, I have to object to your post.
      
      Besides the obvious simplicity and ease of maintenance of the free castering design,
      its 180 degree pivot allows for incredibly tight turns while parking or
      simple maneuvering around objects. Assuming the airplane doesn't have a draggy
      brake on one side or the other, taxiing is a breeze with an occasional tap on
      the brake to maintain directional control.
      
      The only negative I can see is replacing brake pads slightly more often, but pads
      are cheap and there's no linkage, springs, holes in the firewall, or any of
      the other hoopla associated with a steerable nosewheel. And best of all, the
      nose wheel alignment to the runway self corrects automatically upon landing, so
      any worry about side loads is moot.
      
      Your claim that it's "a much lesser solution" needs some qualification. I'm curious,
      in what way?
      
      Best,
      
      Rick Lindstrom
      ZenVair N42KP
      
      -----Original Message-----
      >From: LarryMcFarland <larry@macsmachine.com>
      >Sent: Oct 25, 2009 8:07 AM
      >To: zenith601-list@matronics.com
      >Subject: Re: Zenith601-List: Re: Nose wheel fork failure
      >
      >
      >Ron,
      >That fork has a logical reason for failing and I'm sure it'll reveal 
      >itself eventually.
      >The steerable linked nose gear is more asset than liability. To be able 
      >to steer around potholes and rough fields is
      >a major improvement over differential braking. I've experienced both 
      >types. For the tail dragger, it's logical, but for tri-gear
      >it would be detrimental to add a free-caster nose-wheel to side braking 
      >mains. I know it's done in some aircraft, but
      >it's a much lesser solution to the steerable nose wheel.
      >Curious how the nose wheel steering got sideways far enough to fail the 
      >fork. Or it would seem
      >there was not enough attention to where the nose wheel was at the time.
      >
      >Larry McFarland 601HDS at www.macsmachine.com
      
      
Message 5
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| Subject:  | Re: Nose wheel fork failure | 
      
      Could it be possible that the "free-caster nose wheel" is the problem? I
       do not understand how this was accomplish!!!!Landing in with a crosswind
       would indicate the nose wheel as cocked so when the nose wheel came down
       a side load was appllied to it. Now with a caster nose wheel, the nose wh
      eel would be forced to turn to it's limit. Thus the fork could bend. My $0
      .02   Jerry of GA
      
      
      -----Original Message-----
      From: LarryMcFarland <larry@macsmachine.com>
      Sent: Sun, Oct 25, 2009 10:07 am
      Subject: Re: Zenith601-List: Re: Nose wheel fork failure
      
      
      m> 
      
      Ron, 
      That fork has a logical reason for failing and I'm sure it'll reveal itsel
      f eventually. 
      The steerable linked nose gear is more asset than liability. To be able to
       steer around potholes and rough fields is 
      a major improvement over differential braking. I've experienced both types
      . For the tail dragger, it's logical, but for tri-gear 
      it would be detrimental to add a free-caster nose-wheel to side braking ma
      ins. I know it's done in some aircraft, but 
      it's a much lesser solution to the steerable nose wheel. 
      Curious how the nose wheel steering got sideways far enough to fail the fo
      rk. Or it would seem 
      there was not enough attention to where the nose wheel was at the time. 
      
      Larry McFarland 601HDS at www.macsmachine.com 
      
      
Message 6
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  | 
      
      
| Subject:  | Re: Nose wheel fork failure | 
      
      Rick, you are talking about a gear that is design to have a castering gear
      . The 601 nose gear was not designned for a castering nose wheel. On a cas
      tering nose wheel the strut is in front of the wheel center so the wheel
       is drag down the runway not pushed.  Jerry of GA
      
      
      -----Original Message-----
      From: Rick Lindstrom <tigerrick@mindspring.com>
      Sent: Sun, Oct 25, 2009 10:42 am
      Subject: Re: Zenith601-List: Re: Nose wheel fork failure
      
      
      .com>
      Not to pick a fight here, Larry, but after flying close to 5000 hours in
       Grumman 
      merican airplanes with free castering nose gear, I have to object to your
       post.
      Besides the obvious simplicity and ease of maintenance of the free casteri
      ng 
      esign, its 180 degree pivot allows for incredibly tight turns while parkin
      g or 
      imple maneuvering around objects. Assuming the airplane doesn't have a dra
      ggy 
      rake on one side or the other, taxiing is a breeze with an occasional tap
       on 
      he brake to maintain directional control.
      The only negative I can see is replacing brake pads slightly more often,
       but 
      ads are cheap and there's no linkage, springs, holes in the firewall, or
       any of 
      he other hoopla associated with a steerable nosewheel. And best of all, th
      e 
      ose wheel alignment to the runway self corrects automatically upon landing
      , so 
      ny worry about side loads is moot.
      Your claim that it's "a much lesser solution" needs some qualification. I'
      m 
      urious, in what way?
      Best,
      Rick Lindstrom
      enVair N42KP
      -----Original Message-----
      From: LarryMcFarland <larry@macsmachine.com>
      Sent: Oct 25, 2009 8:07 AM
      Subject: Re: Zenith601-List: Re: Nose wheel fork failure
      
      m>
      
      Ron,
      That fork has a logical reason for failing and I'm sure it'll reveal 
      itself eventually.
      The steerable linked nose gear is more asset than liability. To be able 
      to steer around potholes and rough fields is
      a major improvement over differential braking. I've experienced both 
      types. For the tail dragger, it's logical, but for tri-gear
      it would be detrimental to add a free-caster nose-wheel to side braking 
      mains. I know it's done in some aircraft, but
      it's a much lesser solution to the steerable nose wheel.
      Curious how the nose wheel steering got sideways far enough to fail the 
      fork. Or it would seem
      there was not enough attention to where the nose wheel was at the time.
      
      Larry McFarland 601HDS at www.macsmachine.com
      
      -========================
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Message 7
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  | 
      
      
| Subject:  | Re: Nose wheel fork failure | 
      
      
      I don't think you should try to strengthen the fork any more than it  
      is. If you make it too strong, in a hard landing it would shift the  
      first point of failure to some other component. From the looks of  
      those photos, the nose gear must have come down very hard and it  
      wouldn't have helped much if the fork had stayed intact. That fork  
      absorbed a lot of energy before it failed. It won't do much good to  
      make the fork indestructible if it causes the strut to shear off and  
      you plant the nose on the runway at 40 mph.
      
      At 50 mph and full throttle, that elevator has a whole lot of  
      authority, you have to use a light hand on it. At full throttle, once  
      that nosewheel comes off, that airplane wants to get airborne in a  
      hurry. Be ready to chop the throttle and let it settle in.
      
      
      -- 
      Bryan Martin
      CH 601 XL
      Builder No: 64003
      
      
Message 8
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  | 
      
      
| Subject:  | Re: Nose wheel fork failure | 
      
      
      Yes, I know, Jerry.
      
      My 601XL has a steerable nosewheel, just as designed. I was just responding to
      Larry's assertion that free-castering nosewheels are inferior in some way.
      
      The ONLY way you can impart a side load to the nose fork on the 601 is to land
      with it cocked significantly to one side. This means either full rudder deflection
      or something not right in the initial rigging. But it's just speculation
      at this point, until the facts are in.
      
      Rick
      
      -----Original Message-----
      >From: jeyoung65@aol.com
      >Sent: Oct 25, 2009 9:01 AM
      >To: zenith601-list@matronics.com
      >Subject: Re: Zenith601-List: Re: Nose wheel fork failure
      >
      >Rick, you are talking about a gear that is design to have a castering gear. The
      601 nose gear was not designned for a castering nose wheel. On a castering nose
      wheel the strut is in front of the wheel center so the wheel is drag down
      the runway not pushed.  Jerry of GA
      >
      >
      >-----Original Message-----
      >From: Rick Lindstrom <tigerrick@mindspring.com>
      >To: zenith601-list@matronics.com
      >Sent: Sun, Oct 25, 2009 10:42 am
      >Subject: Re: Zenith601-List: Re: Nose wheel fork failure
      >
      >
      >Not to pick a fight here, Larry, but after flying close to 5000 hours in Grumman
      
      >merican airplanes with free castering nose gear, I have to object to your post.
      >Besides the obvious simplicity and ease of maintenance of the free castering 
      >esign, its 180 degree pivot allows for incredibly tight turns while parking or
      
      >imple maneuvering around objects. Assuming the airplane doesn't have a draggy
      
      >rake on one side or the other, taxiing is a breeze with an occasional tap on 
      >he brake to maintain directional control.
      >The only negative I can see is replacing brake pads slightly more often, but 
      >ads are cheap and there's no linkage, springs, holes in the firewall, or any of
      
      >he other hoopla associated with a steerable nosewheel. And best of all, the 
      >ose wheel alignment to the runway self corrects automatically upon landing, so
      
      >ny worry about side loads is moot.
      >Your claim that it's "a much lesser solution" needs some qualification. I'm 
      >urious, in what way?
      >Best,
      >Rick Lindstrom
      >enVair N42KP
      >-----Original Message-----
      >From: LarryMcFarland <larry@macsmachine.com>
      >Sent: Oct 25, 2009 8:07 AM
      >To: zenith601-list@matronics.com
      >Subject: Re: Zenith601-List: Re: Nose wheel fork failure
      >
      >
      >Ron,
      >That fork has a logical reason for failing and I'm sure it'll reveal 
      >itself eventually.
      >The steerable linked nose gear is more asset than liability. To be able 
      >to steer around potholes and rough fields is
      >a major improvement over differential braking. I've experienced both 
      >types. For the tail dragger, it's logical, but for tri-gear
      >it would be detrimental to add a free-caster nose-wheel to side braking 
      >mains. I know it's done in some aircraft, but
      >it's a much lesser solution to the steerable nose wheel.
      >Curious how the nose wheel steering got sideways far enough to fail the 
      >fork. Or it would seem
      >there was not enough attention to where the nose wheel was at the time.
      >
      >Larry McFarland 601HDS at www.macsmachine.com
      >
      >-===========================================================
      >-=          - The Zenith601-List Email Forum -
      >-= Use the Matronics List Features Navigator to browse
      >-= the many List utilities such as List Un/Subscription,
      >-= Archive Search & Download, 7-Day Browse, Chat, FAQ,
      >-= Photoshare, and much much more:
      >-
      >-=   --> http://www.matronics.com/Navigator?Zenith601-List
      >-
      >-===========================================================
      >-=               - MATRONICS WEB FORUMS -
      >-= Same great content also available via the Web Forums!
      >-
      >-=   --> http://forums.matronics.com
      >-
      >-===========================================================
      >-=             - List Contribution Web Site -
      >-=  Thank you for your generous support!
      >-=                              -Matt Dralle, List Admin.
      >-=   --> http://www.matronics.com/contribution
      >-===========================================================
      >
      >
      
      
Message 9
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  | 
      
      
| Subject:  | Re: Nose wheel fork failure | 
      
      
      Hi Rick,
      
      One problem I have had with "Yankee" type planes has to do with the 
      lack of nose wheel steering when taking off in a crosswind.  I found 
      I had to apply brakes to one side while using takeoff power to keep 
      the plane pointed down the runway for the initial takeoff run.  I 
      suppose the rudder will keep it pointed down the runway when enough 
      speed is reached for rudder effectiveness, but in the beginning you 
      are applying opposing forces, throttle and brakes, at the same time 
      in order to perform a normal operation.  (My brief experience with 
      this problem was in a rented AA5 many years ago.)
      
      I agree with your point about taxi control with the brakes.  It works 
      just fine.  However, I prefer the steerable nose wheel for taxiing 
      too.  It is true that the free castering nose wheel can make a 
      tighter turn, but I have found the typical Cessna arrangement turns 
      tighter if you use both differential braking and nose steering together.
      
      I am currently flying a Tecnam Echo that has a brake handle and nose 
      steering.  This turns OK, but I find it won't turn quite as tight a 
      circle on the ground as I would prefer.  It takes a little planning 
      to turn into the wind for run-up and then get back to the heading for 
      getting to the runway.  This wouldn't be a problem with a large 
      run-up pad, but that is not what you find at my home airport.
      
      Best regards,
      
      Paul
      XL awaiting engineering changes
      
      
      At 08:42 AM 10/25/2009, you wrote
      ><tigerrick@mindspring.com>
      >
      >Not to pick a fight here, Larry, but after flying close to 5000 
      >hours in Grumman American airplanes with free castering nose gear, I 
      >have to object to your post.
      
      
Message 10
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  | 
      
      
| Subject:  | Re: Nose wheel fork failure | 
      
      
      
      Hi Rick,
      I certainly understand your perspective and for fast maneuvering on the 
      ground, or ease of pulling thru uneven grass or avoiding objects during 
      taxi, the
      steering nose wheel probably has an edge. I too have flown both types 
      and disliked having to rev the prop to get one wheel or the other loose 
      from soggy
      ground. The free caster nose wheel can touch down out of the line of 
      travel and jerk the nose with it and the same thing for steerable, but 
      you have to be
      inattentive for that to happen.  On reverse handling for the steerable 
      you need a tow bar. For the Zenith the strut doesn't lend any structural 
      advantage
      to a free caster nose wheel.  On the Grumman, the designers took all 
      structural issues into consideration to accomplish their nose gear.
      
      Respectfully,
      Larry McFarland 601HDS at www.macsmachine.com
      Do not archive
      
      Rick Lindstrom wrote:
      >
      > Not to pick a fight here, Larry, but after flying close to 5000 hours in Grumman
      American airplanes with free castering nose gear, I have to object to your
      post.
      >
      > Besides the obvious simplicity and ease of maintenance of the free castering
      design, its 180 degree pivot allows for incredibly tight turns while parking or
      simple maneuvering around objects. Assuming the airplane doesn't have a draggy
      brake on one side or the other, taxiing is a breeze with an occasional tap
      on the brake to maintain directional control.
      >
      > The only negative I can see is replacing brake pads slightly more often, but
      pads are cheap and there's no linkage, springs, holes in the firewall, or any
      of the other hoopla associated with a steerable nosewheel. And best of all, the
      nose wheel alignment to the runway self corrects automatically upon landing,
      so any worry about side loads is moot.
      >
      > Your claim that it's "a much lesser solution" needs some qualification. I'm curious,
      in what way?
      >
      > Best,
      >
      > Rick Lindstrom
      > ZenVair N42KP
      >   
      
      
Message 11
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  | 
      
      
| Subject:  | Re: Nose wheel fork failure | 
      
      
      
      larry(at)macsmachine.com wrote:
      > 
      > Curious how the nose wheel steering got sideways far enough to fail the 
      > fork. Or it would seem
      > there was not enough attention to where the nose wheel was at the time.
      > 
      
      
      Larry,
      
      As I recall the XL plunks down the nose wheel right down after touching the mains
      in a full stall landing (only flew one once).  It also had the main gear reversed
      from the design position.  The photo guide has many pictures of the main
      gear in the reversed position, it is noted that the pictures are not correct
      but many people have followed those pictures and have a heavy nose wheel as a
      result.  Don't know if this is the case here but it merits discussion.
      
      --------
      Ron Lendon, Clinton Township, MI
      WW Corvair with Roy's Garage 5th bearing
      Zodiac XL, ScrapBuilder ;-)
      http://www.mykitlog.com/rlendon
      Corvair Engine Prints:
      http://home.comcast.net/~rlendon/site/
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=269390#269390
      
      
Message 12
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      Hi All
      
      Well today after much aggravation with the Aero Carb on the Corvair engine  
      we decided to switch to a MA-3A and had it rebuilt with a MA-3SPA nozzle to 
       richen it up slightly. We taxied the plane 4 or 5 times thru all power  
      setting before our test pilot was called to duty. Ralph (test pilot) had  
      flown with me in the first 601xl I built so he was not as nervous as a first  
      time test pilot would be flying behind a Corvair or even the 601 for that  
      matter. 
      The first flight went off without a hitch and the Corvair preformed as  
      expected the prop is set at 10 1/2 degrees 2700 to 2800 static and 2900 109 MPH
      
       climb out. The CHT's were around 300 and the oil temp was 210 degrees 
      before the  cooler EGT's were around 1,200 degrees.
      
      All the parts on this plane are from Aerolite and the new Tech that picks  
      up from the AC side of the alt worked great also (No more flywheel  pickup).
      The new cowling and ram air Baffles really keep the temps down but I know  
      our oil cooler setup works better than any other cooler out there when 
      combined  with our baffles.
      
      Tomorrow I will fit the wheel Pants and tinker with the trim a bit but all  
      and all a great day.
      
      Watch the First Flight on U-tube 
      _http://www.youtube.com/watch?v=XwNrpIMhr_A_ (http://www.youtube.com/watch?v=XwNrpIMhr_A) 
      
      Jeff
      _www.aeroliteproducts.com_ (http://www.aeroliteproducts.com) 
      
      
Message 13
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  | 
      
      
| Subject:  | Re: Nose wheel fork failure | 
      
      I've stayed out of this but -- a couple of comments.  
      
      We've had one or more hard landings because of the nose thump-down habit 
      -- more than one in gusty conditions.  This eventually led to a firewall 
      and stiffener replacement -- along with the phenolic block in the lower 
      main gear.
      
      We've changed a few things, besides the repairs.  Half flap approaches, 
      full nose up trim, 60 kias on final to touch down.  Makes for a much 
      smoother landing and virtually no touchdown nosegear thump.  Also, BTW, 
      hold the stick back with some nose up trim on takeoff -- it takes the 
      pressure off a weak point in this airplane.
      
      As to this incident -- it certainly appears that you had rudder in you 
      didn't realize or something was really wrong with the rudder-nose gear 
      pushrods after taxi started. Prop strike -- hope you are getting an 
      engine teardown to check the interior!
      
      Karl
        ----- Original Message ----- 
        From: Ron Lendon 
        To: zenith601-list@matronics.com 
        Sent: Sunday, October 25, 2009 7:38 PM
        Subject: Zenith601-List: Re: Nose wheel fork failure
      
      
      <rlendon@comcast.net>
      
      
        larry(at)macsmachine.com wrote:
        > 
        > Curious how the nose wheel steering got sideways far enough to fail 
      the 
        > fork. Or it would seem
        > there was not enough attention to where the nose wheel was at the 
      time.
        > 
      
      
        Larry,
      
        As I recall the XL plunks down the nose wheel right down after 
      touching the mains in a full stall landing (only flew one once).  It 
      also had the main gear reversed from the design position.  The photo 
      guide has many pictures of the main gear in the reversed position, it is 
      noted that the pictures are not correct but many people have followed 
      those pictures and have a heavy nose wheel as a result.  Don't know if 
      this is the case here but it merits discussion.
      
        --------
        Ron Lendon, Clinton Township, MI
        WW Corvair with Roy's Garage 5th bearing
        Zodiac XL, ScrapBuilder ;-)
        http://www.mykitlog.com/rlendon
        Corvair Engine Prints:
        http://home.comcast.net/~rlendon/site/
      
      
        Read this topic online here:
      
        http://forums.matronics.com/viewtopic.php?p=269390#269390
      
      
Message 14
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| Subject:  | Re: Nose wheel fork failure | 
      
      
      A follow up on the discussion so far,main gear reversed to lighten loads on to
      nose gear.As aircraft was starting to drift to the left a SMALL amount of right
      rudder applied to straighten back to center of runway [sealed] .As the nose
      was a foot or so off the ground when down elevator applied,I never dreamt that
      it would bounce and thump from that hight. But I do now.Repair bill including
      prop around $2000.00 :(  Cheers T87
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=269407#269407
      
      
 
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