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Sport cruiser wing [OFF LINE RESPONSE]

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Terry Phillips

Joined: 11 Jan 2006
Posts: 346
Location: Corvallis, MT

Posted: Thu Jan 29, 2009 8:39 am Post subject: Sport cruiser wing [OFF LINE RESPONSE]

do not archive

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_________________
Terry Phillips
Corvallis, MT
ttp44<at>rkymtn.net
Zenith 601XL/Jab 3300 slow build kit - Tail feathers done; working on the wings.

Last edited by Terry Phillips on Thu Jan 29, 2009 10:12 am; edited 1 time in total

Afterfxllc(at)aol.com
Guest

Posted: Thu Jan 29, 2009 9:36 am Post subject: Sport cruiser wing [OFF LINE RESPONSE]

(I'd appreciate if you do not quote this message on the lists.  Thanks.)

  

 It's a little late for that but it has happened to us all I  think.

  

 Kev



I have seen drawings and photos of the SC wing. Yes, clearly  it is a 

derivative of the 601XL wing. No question of that. However, I'm  unaware of 

any patent on the 601XL wing design, so there would be no patent  

infringement. Plus, I'm sure that if there was any violation of an  

intellectual property agreement between Zenair and CZAW, then Zenair  

lawyers would have them in the courts. I haven't heard of any sign of  that.



While I have never seen detailed construction drawings of the SC  wing, 

IMHO, CZAW produced the design that Zenair should have copied for the  650. 

The SC wing addresses several shortcomings in the 601XL wing. The spar  root 

is significantly stronger and the center spar is reinforced. The  ailerons 

are not balanced and (I believe) are cable operated. However the  flap and 

aileron designs are significantly different from the Zenair  

design--particularly the hinging. I think the ailerons should be balanced.  

But, if and when there are significant SC numbers flying, we'll see if the  

wings start falling off. That is the ultimate test.



The biggest  differences between the SC and the CH601XL designs, again, 

IMHO, is that the  CH601XL was designed to allow scratch building from 

plans. The SC  would  require machined aluminum parts. But that's not all 

bad. A  friend is building a Waiex. He told me that the Waiex can be 

completely  scratch built--except for the wing spar caps. If you are going 

to use their  plans, you must buy their spar caps, and they are pretty 

complex pieces. The  Waiex spar caps are about what the 601XL needs (see 

attached photo). Instead  we have a spar cap with doubler composed of 0.25 x 

1.5" 6061-T6  bar.  Very little chordwise stiffness. Even the HD and HDS at 

least had an  extruded angle for the spar cap. Oh well, we pays our money 

and we takes our  chances.



Perhaps when you have a holiday you could take a drive over to  Brno and 

take a CZAW plant tour. Take your camera and take lots of photos.  CZAW has 

some pretty sharp folks with some good ideas, and the Zenair  community 

could benefit from what you learn.



I'd appreciate if you do  not quote this message on the lists. Thanks.



Regards, Terry

At  06:23 AM 1/29/2009 -0800, you wrote:

 	  Quote: 	
		  Does anyone know if the ailerons on  the sport cruiser are balance ? And if 

they are cable  operated?

  IF the answers are no and yes then I consider it a  straight rip off of 

 the 601 wing.

  Look at the picture in  this link and see what you think. spare angle , 

 rear spar look  identical.

http://www.spriteaviation.co.uk/howcome.html?Button1.x=75&Button1.y=6

   If link does not work google sprite aviation services.

  My point  is  why then did this pass LAA test and the XL needs this  work?



Kev



--------

Austria  ............


	




 

  

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alex_001

Joined: 14 Jan 2007
Posts: 61

Posted: Fri Jan 30, 2009 2:55 am Post subject: Re: Sport cruiser wing [OFF LINE RESPONSE]

have a look here



www.rokoaero.com



and also here  http://www.aerosportitalia.com/  click on the news bottom

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