Canopy latch again but different - LNC2/LEG2

Submitted by Anonymous on

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From: Danny <danny [at] n107sd.com>
Sender: <marv [at] lancaironline.net>
Subject: Canopy latch again but different - LNC2/LEG2
Date: Mon, 23 Jun 2014 07:24:58 -0400
To: <lml [at] lancaironline.net>

I have the Legacy type latch in my LNC2.  On two occasions I have failed to latch the canopy prior to takeoff: the first time I had enough runway to abort the takeoff; the second time I did not.  As taught to me early in my flight training, first and foremost, if something goes wrong, fly the plane!  That’s what I’ve done and I’m here to talk about it.  On the second occasion I just flew the plane and returned to base.  I no longer fail to latch the canopy but my situation now is different.  I’m now experiencing the latch failing to hold in flight.  On several recent occasions my latch as unexpectedly released the canopy hold down position in flight.  I adjusted the mechanism to make sure it’s capturing the canopy correctly but it still pops open and I can’t see why.  Is the over-center spring getting weak or is there something else going on?  Have any of you experienced this?  I now need a secondary latch to keep the primary latch from releasing the hold.  Right now I’m pretty much grounded until I find a solution that goes beyond bubble gum and bailing wire or duct tape.  From what I’ve read here I know there are some folks working on this with Lancair but so far there’s nothing solid on it that I’ve seen.  Any suggestions, comments, or helpful hints would be appreciated.



Danny

LNC2-360 Mk-II

AOPA 04856278

EAA 647062

NRA 156453324

Nothing is foolproof to the sufficiently talented fool.

Canopy latch again but different - LNC2/LEG2

Submitted by Anonymous on

From: Bill Bradburry <bbradburry [at] verizon.net>
Sender: <marv [at] lancaironline.net>
Subject: RE: [LML] Canopy latch again but different - LNC2/LEG2
Date: Mon, 23 Jun 2014 19:26:44 -0400
To: <lml [at] lancaironline.net>
Message Header


Undecoded Message

Danny,

Can you provide pictures of your particular installation?

Bill



-----Original Message-----

From: Lancair Mailing List [lml [at] lancaironline.net (mailto:)

] On Behalf Of Danny

Sent: Monday, June 23, 2014 6:25 AM

To: Lancair Mailing List

Subject: [LML] Canopy latch again but different - LNC2/LEG2



I have the Legacy type latch in my LNC2.  On two occasions I have failed

to latch the canopy prior to takeoff: the first time I had enough runway

to abort the takeoff; the second time I did not.  As taught to me early

in my flight training, first and foremost, if something goes wrong, fly

the plane!  That's what I've done and I'm here to talk about it.  On the

second occasion I just flew the plane and returned to base.  I no longer

fail to latch the canopy but my situation now is different.  I'm now

experiencing the latch failing to hold in flight.  On several recent

occasions my latch as unexpectedly released the canopy hold down

position in flight.  I adjusted the mechanism to make sure it's

capturing the canopy correctly but it still pops open and I can't see

why.  Is the over-center spring getting weak or is there something else

going on?  Have any of you experienced this?  I now need a secondary

latch to keep the primary latch from releasing the hold.  Right now I'm

pretty much grounded until I find a solution that goes beyond bubble gum

and bailing wire or duct tape.  From what I've read here I know there

are some folks working on this with Lancair but so far there's nothing

solid on it that I've seen.  Any suggestions, comments, or helpful hints

would be appreciated.



Danny

LNC2-360 Mk-II

AOPA 04856278

EAA 647062

NRA 156453324

Nothing is foolproof to the sufficiently talented fool.





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Canopy latch again but different - LNC2/LEG2

Submitted by Anonymous on

From: Charles Brown <browncc1 [at] verizon.net>
Sender: <marv [at] lancaironline.net>
Subject: Re: Canopy latch again but different - LNC2/LEG2
Date: Wed, 25 Jun 2014 07:43:50 -0400
To: <lml [at] lancaironline.net>
Message Header


Undecoded Message
Danny, 

Not sure where your problem is but one observation -- the overcenter spring isn't the only thing holding the latch handle closed.  If it has rotated over center, then the up force on the latches is also holding the handle down.

Just making a guess, I wonder if the canopy is seating better and there's less up force on it than previously?  That might "relax" the overcenter closure...  Do you have an air-inflated canopy seal, and the pressure has dropped?  Just thoughts...

Charley Brown
Legacy #299



From: Danny <danny [at] n107sd.com

>
Date: June 23, 2014 6:24:58 AM CDT
Subject: Canopy latch again but different - LNC2/LEG2



I have the Legacy type latch in my LNC2.  On two occasions I have failed to latch the canopy prior to takeoff: the first time I had enough runway to abort the takeoff; the second time I did not.  As taught to me early in my flight training, first and foremost, if something goes wrong, fly the plane!  That’s what I’ve done and I’m here to talk about it.  On the second occasion I just flew the plane and returned to base.  I no longer fail to latch the canopy but my situation now is different.  I’m now experiencing the latch failing to hold in flight.  On several recent occasions my latch as unexpectedly released the canopy hold down position in flight.  I adjusted the mechanism to make sure it’s capturing the canopy correctly but it still pops open and I can’t see why.  Is the over-center spring getting weak or is there something else going on?  Have any of you experienced this?  I now need a secondary latch to keep the primary latch from releasing the hold.  Right now I’m pretty much grounded until I find a solution that goes beyond bubble gum and bailing wire or duct tape.  From what I’ve read here I know there are some folks working on this with Lancair but so far there’s nothing solid on it that I’ve seen.  Any suggestions, comments, or helpful hints would be appreciated.

Danny
LNC2-360 Mk-II
AOPA 04856278
EAA 647062
NRA 156453324
Nothing is foolproof to the sufficiently talented fool.

Canopy latch again but different - LNC2/LEG2

Submitted by Anonymous on

From: Danny <danny [at] n107sd.com>
Sender: <marv [at] lancaironline.net>
Subject: Re: [LML] Re: Canopy latch again but different - LNC2/LEG2
Date: Fri, 27 Jun 2014 09:52:18 -0400
To: <lml [at] lancaironline.net>
Message Header


Undecoded Message

I took some pictures to post and in doing so I can see the latch is not rotating over center in an adequate manner.  I'm off work today so I'm planning to adjust it to rotate over center more.  Hopefully, that will solve this issue.

 

Danny

LNC2-360 Mk-II

AOPA 04856278

EAA 647062

NRA 156453324

Nothing is foolproof to the sufficiently talented fool.

 

 

On 06/23/2014 17:26, Bill Bradburry wrote:

Danny,
Can you provide pictures of your particular installation?
Bill 

-----Original Message-----
From: Lancair Mailing List [mailto:lml [at] lancaironline.net] On Behalf Of Danny
Sent: Monday, June 23, 2014 6:25 AM
To: Lancair Mailing List
Subject: [LML] Canopy latch again but different - LNC2/LEG2

I have the Legacy type latch in my LNC2.  On two occasions I have failed 
to latch the canopy prior to takeoff: the first time I had enough runway 
to abort the takeoff; the second time I did not.  As taught to me early 
in my flight training, first and foremost, if something goes wrong, fly 
the plane!  That's what I've done and I'm here to talk about it.  On the 
second occasion I just flew the plane and returned to base.  I no longer 
fail to latch the canopy but my situation now is different.  I'm now 
experiencing the latch failing to hold in flight.  On several recent 
occasions my latch as unexpectedly released the canopy hold down 
position in flight.  I adjusted the mechanism to make sure it's 
capturing the canopy correctly but it still pops open and I can't see 
why.  Is the over-center spring getting weak or is there something else 
going on?  Have any of you experienced this?  I now need a secondary 
latch to keep the primary latch from releasing the hold.  Right now I'm 
pretty much grounded until I find a solution that goes beyond bubble gum 
and bailing wire or duct tape.  From what I've read here I know there 
are some folks working on this with Lancair but so far there's nothing 
solid on it that I've seen.  Any suggestions, comments, or helpful hints 
would be appreciated.

Danny
LNC2-360 Mk-II
AOPA 04856278
EAA 647062
NRA 156453324
Nothing is foolproof to the sufficiently talented fool.


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