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Alaska CH701's

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n7hqk

Joined: 02 Mar 2006
Posts: 14
Location: Cedar City, Utah

Posted: Fri May 08, 2009 5:39 am Post subject: Alaska CH701's

Hi,  I'm looking for information on Alaska CH701 owner/builders. I' finally am getting settled in Wasilla and will have my 28x32 heated shop next month.  Can't wait to get started on my Airplane!  

Ray D. Congdon - KL7UT

Lead Communications Technician

Red Dog Mine Alaska

68.0690 North 162.855506 West 

100 Miles North of the Arctic Circle

http://www.reddogalaska.com/

_________________
Ray D. Congdon - N7HQK

d.shrader

Joined: 21 Nov 2008
Posts: 38

Posted: Mon Jun 22, 2009 12:53 am Post subject: Re: Alaska CH701's

Hi ray



I'm only 20 mi north of the arctic circle....lol Kotzebue here.  myself and two other A&P are building 3 701's.  Next time u come through stop bye the Bering Air shop.  Were scratch building and so far the rudder, horizontal, elevator, and spars are done for all three planes....we started in Oct.  and love the building progress.  Ive read about a couple of 701's in anchorage that belong to the local EAA members but haven't seen them yet.  Good luck on the build (I'm loving it.....even the mistakes)  and ill try to answer your Q's if you throw me slow balls.



Dave

Last edited by d.shrader on Tue Jun 30, 2009 8:36 pm; edited 1 time in total

n7hqk

Joined: 02 Mar 2006
Posts: 14
Location: Cedar City, Utah

Posted: Mon Jun 22, 2009 9:05 pm Post subject: Re: Alaska CH701's

Great!  I usually fly direct to Anchorage.  But maybe I can make a side trip on one R&R.  Right now I'm putting together plans to move my shop tools up to Wasilla from Cedar City UT.  Will be making the trip next month...  Renting a U-Haul!  Whew that will make Alcan trip # 15!  I Must be nuts...

_________________
Ray D. Congdon - N7HQK

d.shrader

Joined: 21 Nov 2008
Posts: 38

Posted: Tue Jun 30, 2009 8:33 pm Post subject: Re: Alaska CH701's

Ray



i just met Rob Stapleton from the anchorage eaa chapter 42 www.eaa42.org great guy .  he says that there are a couple 701's flying in his chapter and a 801 plus a 701 in progress ... check out the site (i would join if i was closer), might be something for you to consider.  He said that there is a wasillia chapter too.



ribs and nose ribs installed on 3 left wings 



Dave

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kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Thu Jul 02, 2009 7:27 am Post subject: Re: Alaska CH701's

Interesting wing rib setup. Long wing?



Kevin

_________________
â€œAlways do what you are afraid to do.â€
R.W. Emerson (1803-1882)

"Real freedom is the sustained act of being an individual." WW - 2009

"Life is a good deal...it's worth it" Feb 1969
Dorothy McCune

John Bolding

Joined: 23 May 2006
Posts: 281

Posted: Thu Jul 02, 2009 7:52 am Post subject: Alaska CH701's

Kevin,  what are you referring to?

john



---

kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Thu Jul 02, 2009 8:06 am Post subject: Re: Alaska CH701's

Well I count 7 full ribs and 3 rear only ribs on that front spar in the pic. And the spar tip looks extended as well.



Kevin

d.shrader

Joined: 21 Nov 2008
Posts: 38

Posted: Thu Jul 02, 2009 11:29 pm Post subject: Re: Alaska CH701's

 	  kmccune wrote: 	
		  Interesting wing rib setup. Long wing?



Kevin 	




Great eyes Kevin



Wings stretched 18'' or 3' overall I'm impressed u caught it.... False ribs are made out of .016.

Were going with the vg's and lengthening the the wing a little.



So the ribs I under stand but how did u figure out the length?  Were u looking at the tip length or rib spacing? 



Dave

John Bolding

Joined: 23 May 2006
Posts: 281

Posted: Fri Jul 03, 2009 3:40 am Post subject: Alaska CH701's

Musta been taking my afternoon nap, (shut up Joe) where are the pictures you 

2 are referring to ?    John

---

kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Fri Jul 03, 2009 3:52 am Post subject: Re: Alaska CH701's

Dave,

The spar tip is clearly longer, but as John knows I am concentrating right now on the wing so I have been looking at a lot of 701 spars, both long wing and standard.



John the pic is in the message before my comment. 



Kevin

d.shrader

Joined: 21 Nov 2008
Posts: 38

Posted: Fri Jul 03, 2009 9:34 pm Post subject: Re: Alaska CH701's

 	  kmccune wrote: 	
		  Dave,

The spar tip is clearly longer, but as John knows I am concentrating right now on the wing so I have been looking at a lot of 701 spars, both long wing and standard.



John the pic is in the message before my comment. 



Kevin 	




Kevin 



we just went with JG's idea from stolspeed for the length and the 43.13 for the splice/doubbler.  The false ribs was just easier than the L angle idea for anti-oilcaning we already had the formers and .016 ribs makes the weight negligible.



  PS  sorry for the hyjack Ray   



So where are you in your project and what have you decided on your wings



Dave

vgstol(at)bigpond.net.au
Guest

Posted: Sat Jul 04, 2009 3:09 am Post subject: Alaska CH701's

Gday Wing Builders,

  

 Our extended 701 wings are still going well, no problems.  Wouldn't ever want to go back to the short wing.....

  

 If you're building a wing from scratch, how about having a look at the plans for a 750 wing.  That would be heaps strong for a 701.  I think it has a longer spar, so doesn't easy apply to extending an original wing, but worth a look just for reference.  Would anyone with 750 plans like to do a comparison with the 701 wing??  

   

 If the attachment fittings are the same, I'd like to see Zenith offer the 750 wing as an alternative for the 701.  That would make the 701 into an even better STOL machine.  The old adage: "....For good STOL you need lots of power and lots of wing....".  Got lots of power now with the 912S - matched with the 750 wing would be tops.  Especially for floats.....

 

  

The long wing is also really good for matching with engines with marginal thrust.  There’s a rule of thumb in aircraft design that says that power required for straight and level flight is inversely proportional the square of the span loading.  So for the same weight, that becomes inversely proportional to the square of the span.  ie – For a 701 standard wing at 27’ lengthened to 30’ -  27 squared divided by 30 squared = 0.81.  So it would require only 80% as much power to fly the longer wing, leaving the rest to contribute to climb.  Climb at 40 kts was measured to be 100fpm better with our extended wings.  See http://www.stolspeed.com/longer-wing   To get the effect of 20% more power by only adding a few pounds of wing weight is real good value.  And it makes a heck of a difference which you feel right away when you try it!  

  

Carry on building, it'll be worth the effort...... 

  

JG  



 On Sat, Jul 4, 2009 at 3:34 PM, d.shrader <chilledj(at)yahoo.com (chilledj(at)yahoo.com)> wrote:

 [quote]--> Zenith701801-List message posted by: "d.shrader" <chilledj(at)yahoo.com (chilledj(at)yahoo.com)>

 



kmccune wrote:

 	  Quote: 	
		   Dave,

 The spar tip is clearly longer, but as John knows I am concentrating right now on the wing so I have been looking at a lot of 701 spars, both long wing and standard.



 > John the pic is in the message before my comment.
	


 	  Quote: 	
		  

 Kevin


	




Kevin



we just went with JG's idea from stolspeed for the length and the false ribs was just easier than the L angle idea for anti-oilcaning we already had the formers and .016 ribs makes the weight negligible.

 

So where are you in your project and what have you decided on your wings



Dave





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[b]

kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Sat Jul 04, 2009 5:09 am Post subject: Re: Alaska CH701's

Ray , the high jack was my doing, sorry. 

The tail is done and the cabin side are done the wing ribs and flaperon ribs are done, just getting ready for the spars. Gotta build a bench riveter first. 

 Mine will also be ~400mm longer with the larger/thicker wing doubler and .125" extrusion. I may copy the spar attach points that Savannah uses as well. The .125" extrusion is just due to cost considerations for shipping. And I will not be building slats.

Kevin

[quote="d.shrader"] 	  kmccune wrote: 	
		  

Kevin 

  PS  sorry for the hyjack Ray   



So where are you in your project and what have you decided on your wings



Dave

d.shrader

Joined: 21 Nov 2008
Posts: 38

Posted: Sat Jul 04, 2009 10:02 pm Post subject: Re: Alaska CH701's

 	  vgstol(at)bigpond.net.au wrote: 	
		  Gday Wing Builders,

 ï¿½

 Our extended 701 wings are still going well, no problems.ï¿½ Wouldn't ever want to go back to the short 



[b] 	




   JG 



thanks for the words of encouragement, and you will get an order for 3 sets of vg's and tail feathers when we are a little closer to the finish line.



Dave

d.shrader

Joined: 21 Nov 2008
Posts: 38

Posted: Sat Jul 04, 2009 10:14 pm Post subject: Re: Alaska CH701's

Kevin

The tail is done and the cabin side are done the wing ribs and flaperon ribs are done, just getting ready for the spars. Gotta build a bench riveter first. 

we also used .125 top and bottem extrusions.

Kevin



 what is the savana attach point design?  Just get a 3x gun and practice i promise after about 20-30 bucks you'll be fine

   Dave

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