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GSC Propeller - edit - Barry more questions

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d(at)cfisher.com
Guest

Posted: Tue Feb 20, 2007 3:02 am Post subject: GSC Propeller - edit - Barry more questions

I added "cable" into this,      

  

 >>That is why I have a 1/8" CABLE   attached to engine and airframe in case of separation.  You lose your engine in a Kitfox and I think   you will be outta control . <<

  

 Barry - A few more questions. 

  

 How old are blades? 

 How old is the hub? 

 How many hours on each ?

  

 When was the last time it was adjusted and  torqued?( months and hours )

  

 Do you have any pictures ?

  

 And Like I said --  All blades can depart no  matter if an IVO, GSC , NSI or WARP . 

 I would like to think that they are isolated but it  Can happen. 

  

 It would be interesting to be able to narrow it  down to what happened. 

  

  

 Dave 

  

  

  

  



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Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Tue Feb 20, 2007 5:09 am Post subject: GSC Propeller - edit - Barry more questions

Additionally: Did you have your  torque wrench calibrated??  It is very easy for a torque wrench to be out  by more than 20 %.  The only way I could see all three blades  departing at one tine would be if the roots were crushed way too much (too much  torque on the mounting bolts) or you hit something mid air which broke all three  blades in one revolution. Were the blades recovered?  You should try very  hard to find them.

  

  

 

Noel [quote]   

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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

wingsdown(at)verizon.net
Guest

Posted: Tue Feb 20, 2007 7:32 am Post subject: GSC Propeller - edit - Barry more questions

I  haven't been on in awhile since the retirement move, but I find the theory of  the security cable very interesting. Has anyone actually exercised the  performance of the theory with an engine departure. Though I like the idea and  find it interesting I am not sure if the  aircraft could   actually be controlled  with the CG  aft and in  constant change. Might not a ballistic parachute be more relied  on? 

  

 Rick  

 [quote]   

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rjdaugh

Joined: 30 Aug 2006
Posts: 195

Posted: Tue Feb 20, 2007 7:57 am Post subject: GSC Propeller - edit - Barry more questions

I read an account a few years ago about a plane (Waco?) that lost a prop and an engine mount with three on board.  They could not see the engine, but it was still hanging there by an oil line.   ONE OIL LINE!  But it was enough to keep their CG far enough forward that they landed safely.    

   

If the oil line had failed to hold the weight of the engine, the out come would have been a disaster.  

   

I don’t have safety cables on my engine, but I get closer every time I read a story like Barry’s.  

   

Randy  

     

.             

  

         

  

From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of Rick

 Sent: Tuesday, February 20, 2007 8:33 AM

 To: kitfox-list(at)matronics.com

 Subject: RE: GSC Propeller - edit - Barry more questions  

  

     

I haven't been on in awhile since the retirement move, but I find the theory of the security cable very interesting. Has anyone actually exercised the performance of the theory with an engine departure. Though I like the idea and find it interesting I am not sure if the aircraft could   actually be controlled  with the CG aft and in  constant change. Might not a ballistic parachute be more relied on?   

    

   

    

Rick   

  

     [quote]



href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com



[b]

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_________________
Randy
Kitfox 5/7 912S
Black Hills, South Dakota

FLIER(at)sbcglobal.net
Guest

Posted: Tue Feb 20, 2007 8:05 am Post subject: GSC Propeller - edit - Barry more questions

The cable(s) are short.  The violent shudder can 

break the mounts but the fuel, coolant, ignition 

lines, and the cowl sorta hold things in.  A safety 

cable allows flex and will hopefully hold the mass on 

the front end once things quit shaking.



Yes, the CG will change, but I'd rather be a little 

aft rather than TOTALLY aft.



--- Original Message ---

From: "Rick" <wingsdown(at)verizon.net>

To: <kitfox-list(at)matronics.com>

Subject: RE: GSC Propeller - edit -  

Barry more questions



 	  Quote: 	
		  I haven't been on in awhile since the retirement 

move, but I find the
	


 	  Quote: 	
		  theory of the security cable very interesting. Has 

anyone actually
	


 	  Quote: 	
		  exercised the performance of the theory with an 

engine departure. Though
	


 	  Quote: 	
		  I like the idea and find it interesting I am not 

sure if the aircraft
	


 	  Quote: 	
		  could   actually be controlled  with the CG aft and 

in  constant change.
	


 	  Quote: 	
		  Might not a ballistic parachute be more relied on? 

 

Rick

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fox5flyer(at)idealwifi.ne
Guest

Posted: Tue Feb 20, 2007 8:30 am Post subject: GSC Propeller - edit - Barry more questions

Personally, I think your days of the good life  would be over as soon as that heavy engine and prop left the  airframe.  The w/b would be so far out I doubt very much if it would be  controllable.  The nose would go straight up in the air without enough  elevator to bring it down, the stall would be very quick, then the spin would  follow.  I think the cables are a good idea.  Weight would be minimal  and might be a bacon saver.

 Anybody know of this happening?  It may  be such a remote possibility that it's not an issue.

 Deke

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dcsfoto

Joined: 24 Aug 2006
Posts: 120

Posted: Tue Feb 20, 2007 9:01 am Post subject: Re: GSC Propeller - edit - Barry more questions

many years  ago I built a MEAD Adventure,prior to finishing the designer 

Mr Mead was killed when the aircraft was testing had an engine mount fail.

the engine and mount seperated the airframe.

i am building a Model 7 and it will have a cable engine to airframe.

cheap insurance

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