---------------------------------------------------------- Zenith701801-List Digest Archive --- Total Messages Posted Sat 07/04/09: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:09 AM - Re: Re: Alaska CH701's (JG) 2. 06:09 AM - Re: Alaska CH701's (kmccune) 3. 11:02 PM - Re: Alaska CH701's (d.shrader) 4. 11:14 PM - Re: Alaska CH701's (d.shrader) ________________________________ Message 1 _____________________________________ Time: 04:09:12 AM PST US Subject: Re: Zenith701801-List: Re: Alaska CH701's From: JG 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 plan s 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=92s 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=92 lengthened to 30=92 - 27 squared divided by 30 squared = 0.81. So it wo uld 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 wrote: > > > 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 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 > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=251411#251411 > > =========== =========== =========== =========== > > ________________________________ Message 2 _____________________________________ Time: 06:09:39 AM PST US Subject: Zenith701801-List: Re: Alaska CH701's From: "kmccune" 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 -------- History is a great teacher if you take time to study it. Steve Bennett Read this topic online here: http://forums.matronics.com/viewtopic.php?p=251429#251429 ________________________________ Message 3 _____________________________________ Time: 11:02:59 PM PST US Subject: Zenith701801-List: Re: Alaska CH701's From: "d.shrader" vgstol(at)bigpond.net.au wrote: > Gday Wing Builders, > > Our extended 701 wings are still going well, no problems. 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 finish line. Dave Read this topic online here: http://forums.matronics.com/viewtopic.php?p=251551#251551 ________________________________ Message 4 _____________________________________ Time: 11:14:55 PM PST US Subject: Zenith701801-List: Re: Alaska CH701's From: "d.shrader" [quote="kmccune"] 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. 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 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=251552#251552 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message zenith701801-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Zenith701801-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/zenith701801-list Browse Digests http://www.matronics.com/digest/zenith701801-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.