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Main Spar Clevis Pin Safety Pin

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DAquaNut(at)aol.com
Guest

Posted: Wed Feb 01, 2006 10:22 pm Post subject: Main Spar Clevis Pin Safety Pin

Group,

 

  The safety pin on the main spar clevis pin on my Firefly  rotates to where 

the point on the safety pin ends up pointing up, even though I  install it 

pointing down. Anyone else have this to occur?  I fold and  unfold to fly. I 

would feel safer if the pin would stay pointing down . If  it came open pointing 

up it would have gravity pulling it down. ( and  out) . Has there ever been a 

case where the safety pins came out of that  clevis?  Is my concern legit?

 

 

 

          Ed Diebel (447  Firefly )

beauford(at)tampabay.rr.c
Guest

Posted: Thu Feb 02, 2006 3:51 am Post subject: Main Spar Clevis Pin Safety Pin

Brother Diebel...

I think a lot of the clevis pins move around some in flight... either to

rotate some,

or slide back and forth some... or both.  Mine do... especially on the strut

fittings.  The archives should

have a fair amount of material on this subject from past discussion strings

I can remember.

 	  Quote: 	
		  From what I have read, some pin movement is a normal thing, although I have

heard of vibration eventually
	


enlarging the holes to the point that they required re-drilling and a larger

clevis pin being fitted on high-time planes.

I never heard of an installed safety pin falling out in flight, but I have

heard of clevis pins falling out when someone

neglected to install the safety pin. (As I recall, that incident was not on

a Kolb).



Assuming you used the right size bit to drill yours, there should not yet be

enough slop

to be a problem in your new ship. The clevis pins should be tight enough not

to allow the

attachment fittings to "rattle" yet loose enough to go in easily.  If you

are concerned about

yours being too loose, why not call Travis at TNK, describe the way your

clevis pins are moving,

and see what he thinks...?



Personally, I use an AN washer on the clevis under my safety pins just to

make certain

there is never any direct contact between the safety pin and the fittings

should the clevis slide some...

I've heard that quite a few folks do this... I also make a point of looking

closely at the clevis

and safety pins for signs of wear, cracks or unusual grooves every time I

install 'em.



Worth what ye paid fer it...  Good luck...



Beauford

FF#076

---

ul15rhb(at)juno.com
Guest

Posted: Thu Feb 02, 2006 4:37 am Post subject: Main Spar Clevis Pin Safety Pin

Ed and others,



The main clevis pins on the cage moves both ways in flight no matter which way it's installed. I fold my Firestar on every flight and put it in with the safety ring facing front so I can see it. I put an AN nut that fits over the pin to take up the slack.



On the subject of the pins wearing or the fittings widening over time, I have not noticed this on my plane. I inspect this often, and mine are very tight after 19 years of flying.



Ralph

Original Firestar

19 years flying it

-- DAquaNut(at)aol.com wrote:




Group,

 

  The safety pin on the main spar clevis pin on my Firefly  rotates to where 

the point on the safety pin ends up pointing up, even though I  install it 

pointing down. Anyone else have this to occur?  I fold and  unfold to fly. I 

would feel safer if the pin would stay pointing down . If  it came open pointing 

up it would have gravity pulling it down. ( and  out) . Has there ever been a 

case where the safety pins came out of that  clevis?  Is my concern legit?

 

 

 

          Ed Diebel (447  Firefly )



 

 

 

Try Juno Platinum for Free! Then, only $9.95/month!

John Jung

Joined: 10 Jan 2006
Posts: 108
Location: Surprise, AZ, USA

Posted: Thu Feb 02, 2006 4:39 am Post subject: Re: Main Spar Clevis Pin Safety Pin

 	  DAquaNut(at)aol.com wrote: 	
		   Has there ever been a 

case where the safety pins came out of that  clevis?  Is my concern legit? 	




Ed and Group,



I have been on the list for 8 years and flying Kolbs for 9. 



The only case of that pin comming out that I can recall, was when the pilot left the pin in his pocket. He got distracted by people asking him questions when he set the plane up. Be assured that the rotation is normal. 



My concern has always been that the pins are installed, not the position. My most minimal preflight always involves looking at the safety pins.

_________________
John Jung
Firestar II N6163J
Surprise, AZ

Steve Boetto

Joined: 11 Jan 2006
Posts: 365

Posted: Thu Feb 02, 2006 4:47 am Post subject: Main Spar Clevis Pin Safety Pin

In a message dated 2/2/2006 1:23:00 AM Eastern Standard Time, 

DAquaNut(at)aol.com writes:



 	  Quote: 	
		   

 

 Group,

 

  The safety pin on the main spar clevis pin on my Firefly  rotates to where 

 the point on the safety pin ends up pointing up, even though I  install it 

 pointing down. Anyone else have this to occur?  I fold and  unfold to fly. I 

 

 would feel safer if the pin would stay pointing down . If  it came open 

 pointing 

 up it would have gravity pulling it down. ( and  out) . Has there ever been 

 a 

 case where the safety pins came out of that  clevis?  Is my concern legit?

 

 

 

      Ed Diebel (447  Firefly )

 

 


	


Hi Ed,



There was a very long thread that I started last year in regard to safety 

pins.  Try putting your pins in from the Rear. I know that normal aircraft 

protocol is that all bolt heads forward but in my Firefly the pins want to walk 

forward. That will keep pressure on the head of the pin and maybe they wont rotate

On the other hand, I use a self lock castle nut and AN bolt followed by a 

steel AN safety pin (not stainless). This requires about 5 extra min. but to me 

it is worth it.  Keep in mind that as far as I know, there has never been a 

failure of a properly placed clevis and pin on a Kolb. The original design is 

quick simple and reliable. I am sure if anyone knows of a failure they will 

respond.



Steve

FF#007

Denny Rowe

Joined: 10 Jan 2006
Posts: 89
Location: Leechburg, PA

Posted: Thu Feb 02, 2006 7:12 am Post subject: Main Spar Clevis Pin Safety Pin

Guys,

Don't forget the bottom tail wire wing nut and safety pin.

I have heard of the safety pin back there getting popped open by high grass.

So I use a castle nut and safety RING in place of the wing nut and safety 

pin.



My $.02



Denny Rowe

Mk-3, 2SI 690-70

DAquaNut(at)aol.com
Guest

Posted: Thu Feb 09, 2006 7:02 pm Post subject: Main Spar Clevis Pin Safety Pin

In a message dated 2/2/2006 5:51:58 A.M. Central Standard Time,  beauford(at)tam

pabay.rr.com writes:

Personally, I use an AN washer on the clevis under my safety pins  just to

make certain

there is never any direct contact between the  safety pin and the fittings

should the clevis slide some...

I've heard  that quite a few folks do this... I also make a point of looking

closely at  the clevis

and safety pins for signs of wear, cracks or unusual grooves  every time I

install 'em.



Worth what ye paid fer it...  Good  luck...





Beauford  ,

 

     That,s  a good Idea I think I will use it.  Thanks!

 

               Ed           Do not archive  it!

rlaird

Joined: 10 Jan 2006
Posts: 373
Location: Houston

Posted: Thu Feb 09, 2006 7:31 pm Post subject: Main Spar Clevis Pin Safety Pin

I not 100% sure of this, but I think the washer is a required item if you

get a UL/UL trainer certified as an E-LSA.



  -- Robert



On 2/9/06, DAquaNut(at)aol.com <DAquaNut(at)aol.com> wrote:

 	  Quote: 	
		  

 

 In a message dated 2/2/2006 5:51:58 A.M. Central Standard Time,

 beauford(at)tam

 pabay.rr.com writes:

 Personally, I use an AN washer on the clevis under my safety pins  just to

 make certain

 there is never any direct contact between the  safety pin and the fittings

 should the clevis slide some...

 I've heard  that quite a few folks do this... I also make a point of

 looking

 closely at  the clevis

 and safety pins for signs of wear, cracks or unusual grooves  every time I

 install 'em.



 Worth what ye paid fer it...  Good  luck...





 Beauford  ,



      That,s  a good Idea I think I will use it.  Thanks!



                Ed           Do not archive  it!

_________________
~~~~~~~~~~~~~~~~~~~
Robert Laird
formerly: MkIIIc w/ 912ULS & Gyrobee
current: Autogyro Cavalon w/ 914ULS
Houston, TX area
http://www.Texas-Flyer.com

slyck(at)frontiernet.net
Guest

Posted: Fri Feb 10, 2006 4:46 am Post subject: Main Spar Clevis Pin Safety Pin

The requirements vary by the inspector.  Each has his own quirks and

druthers.  Mine didn't even ask to se if the engine would run.

-which if it didn't would be a REALLY safe airplane.

He did ask me to put stops on the aileron controls so they wouldn't

interfere at full throw.

I used an FAA inspector who, at the time, didn't charge anything 

-cheapskate, BB

do not archive



On 9, Feb 2006, at 10:30 PM, Robert Laird wrote:



 	  Quote: 	
		   



 I not 100% sure of this, but I think the washer is a required item if 

 you

 get a UL/UL trainer certified as an E-LSA.



   -- Robert



 On 2/9/06, DAquaNut(at)aol.com <DAquaNut(at)aol.com> wrote:

>

> 

> In a message dated 2/2/2006 5:51:58 A.M. Central Standard Time,

> beauford(at)tam

> pabay.rr.com writes:

> Personally, I use an AN washer on the clevis under my safety pins  

> just to

> make certain

> there is never any direct contact between the  safety pin and the 

> fittings

> should the clevis slide some...

> I've heard  that quite a few folks do this... I also make a point of

> looking

> closely at  the clevis

> and safety pins for signs of wear, cracks or unusual grooves  every 

> time I

> install 'em.

>

> Worth what ye paid fer it...  Good  luck...

>

>

> Beauford  ,

>

>      That,s  a good Idea I think I will use it.  Thanks!

>

>                Ed           Do not archive  it!

>

David.Lehman

Joined: 10 Jan 2006
Posts: 265
Location: "Lovely" Fresno CA

Posted: Fri Feb 10, 2006 5:29 am Post subject: Main Spar Clevis Pin Safety Pin

"I used an FAA inspector who, at the time, didn't charge anything"...

Still don't...

DVD

do not archive

On 2/10/06, robert bean <slyck(at)frontiernet.net> wrote:

 	  Quote: 	

 The requirements vary by the inspector.  Each has his own quirks and

 druthers.  Mine didn't even ask to se if the engine would run.

 -which if it didn't would be a REALLY safe airplane.

 He did ask me to put stops on the aileron controls so they wouldn't

 interfere at full throw.

 I used an FAA inspector who, at the time, didn't charge anything 

 -cheapskate, BB

 do not archive

 On 9, Feb 2006, at 10:30 PM, Robert Laird wrote:

 > 

 >

 > I not 100% sure of this, but I think the washer is a required item if

 > you

 > get a UL/UL trainer certified as an E-LSA.

 >

 >   -- Robert

 >

_________________
ô¿ô

"Both optimists and pessimists contribute to the society. The optimist invents the aeroplane, the pessimist the parachute."

--- George Bernard Shaw

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