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601XL AL Sheet Thickness changed from .016 to .020 ??

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dredmoody(at)cox.net
Guest

Posted: Mon Aug 21, 2006 6:39 am Post subject: 601XL AL Sheet Thickness changed from .016 to .020 ??

Email or call the factory to be certain but my tail and wing skins (complete kit) have been 6061-T6 .020" bare. I think that my aileron skins (hingless type) were thinner, probably .016" . I have not started on the fuselage and don't have access to the fuselage skins at this moment but I assume they will be .020" like the wings.



Ed Moody II

Rayne, LA

601XL / 2nd wing



---- Matt Stecher <mrcc1234(at)sbcglobal.net> wrote: 

 	  Quote: 	
		   I am building my shopping list and sorting through the aluminum cut sheets 

 that I found on CH601.org.

 

 These drawings show quite a few parts changed to .020 from the original, 

 plans speced, .016 thickness.  The document states that this is a ZAC 

 approved change, but I cant find any proof of this in my documentation or 

 online.

 

 Whats up?

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admin(at)arachnidrobotics
Guest

Posted: Mon Aug 21, 2006 10:46 am Post subject: 601XL AL Sheet Thickness changed from .016 to .020 ??

I'm scratch building, so I don't know what the factory ships as far as fuselage skins.  The plans call for .025" with the exception of the upper rear skins (turtledeck).  Those are .016".  I haven't calculated the total weight increase in the .025 skins vs the .016 (obviously 1.5625 time more), but I do know that I can still pick the entire front and rear fuselage sections up with one hand.  They're rivited together.  I'm not thinking I'll be needing to worry about the weight.  lol



Tom Henderson



Scratch Building in Oregon

Tail Complete

Fuse getting there

Wings not started (they're the boring part!)

dredmoody(at)cox.net wrote:[quote] --> Zenith-List message posted by: 



Email or call the factory to be certain but my tail and wing skins (complete kit) [quote][b]

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daveaustin2(at)can.rogers
Guest

Posted: Tue Aug 22, 2006 5:42 am Post subject: 601XL AL Sheet Thickness changed from .016 to .020 ??

I've watched this thread with interest for some  time and thought I'd add a comment.

 I built my 601HD some 11 years ago while a couple  of ultralite builder friends were also building 601s.

 Advice given with some emphasis was "keep it as  light as possible".  I took the time and trouble to remove as much surplus  metal as possible from anywhere I could find it.  That included taking the  corners (four triangles) off every piece of "L" angle, structural parts and  skin that did not contribute to strength of the a/c. 

 Final empty weight was 603 lbs with an 80 hp  Rotax.  It seems that if you add 60 lbs (10%) of weight, then take-off run,  stall speed, climb rate etc. are all going to suffer significantly.

 Does the improved appearance of the a/c justify all  those losses?

 Just my thoughts.

 Dave Austin  601HDS - 912, Spitfire Mk  VIII

     [quote][b]

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