Saturday, November 10, 2012

Wing Build Update #2

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Back to my wood wing build update.  It's another series of pictures, and we're picking up exactly where we left off a few days ago.

(My earlier post on this wood rib wing topic may be found here).


Clamping on the anti warp anti crush tubing.

Clamps removed showing anti crush anti warp structure.

Gluing 4 inch wood gussets, 1/4" thickness, to ribs.
Glue up for gussets, close up.

Trailing edge riveted in place.
Slot cut on some ribs to fit flaperon hard points.
Flaperon attachment right angle material, with spacing for 3/16" rivet holes shown.

Flaperon attachment clamped in place, showing 1/4" overhang at rear of trailing edge.
Flaperon cable post, showing how it has to be cut and drilled.
In the above photo, the post is backwards.  This was fixed later in the assembly.  Also, the mark barely visible on the top of the rib is 6" from the trailing edge.

Use 3/16" rivets and large backing washers.
Post bolted in place using AN3 bolts, cut down washers, spacers as necessary.  This post is still backwards.  
Right angle with two 1/8" rivet holes each side.  3/4" x 3/4 x 3/4, or larger.
Rivet four right angle braces in place.  (Two at each end of rib; both end ribs.)

Complete anti-crush anti-warp structure in place on end rib.
Note that the wood 'riblets' have been trimmed.  Consider using a deeper cut angle on the riblets than as shown.  This will aid in covering the wing with fabric later on, so that the riblets don't interfere with fabric.

Hardpoints for anti-sail tubes will be riveted on spars.  Exact placement determined by tubing lengths.
The length of the anti-sail tubes is 2', 4', 3', 3' 1", and 2'.  For these tubes, we're using 3/4" thin wall aluminum tubing of a soft temper.  The ends flatten easily in a vise.

Anti-sail hardpoint riveted in place.
Anti-sail tubing layout.  2', 4', 3', 3'1", 2' lengths from near to far.
Anti-sail hardpoint with AN3 bolts.  Use appropriate washers to ensure clearance.
Lift strut machined attachment, riveted in place.
This is one step to check, recheck, and triple check the placement of each lift strut fitting.  This is also one area that I insist on using aircraft quality rivets, with their higher shear strength.
Trim plates riveted in place.  

Another view of trim plates.  Note spacing washers under plates/rivets to ensure straight / parallel trim plates.
Pitot tube installation using 1/4" aluminum tubing and grommets.
Routing of pitot tubing line.
Another view of pitot tubing attachment.  Pitot tube may extend and retract.
Trailing edge material butt joint.  Sweet and simple.
What's missing from this post?

a)  Never did show the installation of the jury strut fittings.  I'll add that.
b)  Didn't show the wooden structure being painted with spar lacquer.
c)  Didn't show the fabric covering.

Prototype Digital Altimeter from Belite

Please note: James' blog has moved to a Wordpress site. To access it, please visit http://jameswiebe.wordpress.com/. All posts have been transferred to the new site, and all new posts will only be accessible via Wordpress. Thank you for your interest!


Hey, I don't comment on upcoming Belite products, but sometimes beta testers do.

http://flydiverprojects.blogspot.com/2012/11/new-toys.html

Digital Altimeter from Belite Aircraft

Thursday, November 8, 2012

Wing Build Update with wood ribs, Part 1

Please note: James' blog has moved to a Wordpress site. To access it, please visit http://jameswiebe.wordpress.com/. All posts have been transferred to the new site, and all new posts will only be accessible via Wordpress. Thank you for your interest!


The wing design with wood ribs has been tweaked.  Not all of the following is in the blueprint or latest assembly manual, so I thought you'd enjoy a construction update.  I'll be sparse on words but heavy on pictures.  Here goes:

Belite ultralight aircraft wood wing setup.  Nothing glued yet.  All locations marked on layup table.
Rear spar glued with Gorilla glue.  Use water mist and roll the glue in by twisting the spar.
After marking the location of ribs, remove front spar and scuff glue locations on spar.
Glue the front spar.
Glue on false ribs.  Note pre-made slotted wood spacers.
After front spar glue sets, slide wood spacers up.
Glue false spar to false ribs.  Use gorilla glue, moisture and twist the spar around.
Gather the parts for the anti-crush anti-warp assembly.  One set for each end of wing.   Note approximate length (24 3/4 inch)
Note spacing marks.  2 3/8" at each end; 5" spacing inbetween.
Fit tubing into notches.  May require some filing in the wood notches.
Use gorilla glue and some weight.  Let set.
Use high quality wood glue and clamp inside end rib. 
Repeat the anti-crush anti-warp process on each end of the wing.

More soon...

Monday, October 22, 2012

Rod Hightower out at EAA

Please note: James' blog has moved to a Wordpress site. To access it, please visit http://jameswiebe.wordpress.com/. All posts have been transferred to the new site, and all new posts will only be accessible via Wordpress. Thank you for your interest!


Just some quick, simple thoughts on what happened today at the EAA:

In case you haven't heard, Rod Hightower abruptly left the EAA earlier today.  Citing reasons related to his family, he has chosen not to relocate to Oshkosh (this, after two years on the job).

Smelling a stinking, dead rat, I did a slight amount of sleuthing around the web.  Wasn't hard to find the signs of discontent over the brief tenure of Hightower --

*  Anger of the loss of around 30 EAA employees in January of this year, for non-economic reasons
*  Unhappiness with J. Mac McClellan   (note picture with him and his Baron)
*  Changes in AirVenture, the EAA premier fly-in.  (Read an interesting list of pros & cons of Airventure here.)

Hey, I was at that AirVenture, but like all of my recent appearances there, I was consumed with showing and selling Belite aircraft and instrumentation, and didn't pay attention to any changes or any 'rumble' in the ground.  I claim my ignorance pass on fundamental business grounds.  So I have to rely on other sources.

Quoting Robert Goyer from Flying Magazine:
"Despite overall good weather, attendance at this year’s EAA AirVenture fly-in was down from last year, with EAA reporting a drop of approximately 40,000 tickets from the 2011 show, the steep decline due no doubt in part to the continuing economic downturn."
This is a pretty good example of facts, mixed with speculation, and presented only as facts leading to a certain conclusion.  Get that?  The drop in attendance had something to do with an economic downturn, but the wording suggests it is the major part or the only part.  If that's true, I would have expected the dropoff in attendance to have been more severe in 2008, 09, or 2010, when the Recession was the "Great Recession".

It's very interesting, heck, it's fascinating to look at the comments embedded in this linked article from the  EAA website.

I'll make it easy, and extract Joe Coraggio's comments from the bottom of that article:
As one of the attendees of this meeting, it is not surprising to note that none of the comments or concerns of the members that spoke during this meeting are published here. A membership organization of this size is bound to have differences of opinions between those who run the organization and its members. However, the dissension seems to be growing. I think EAA members need to become a bit more active in the administration and oversight of our membership organization. To that end, a few of the items that people commented on are as follows. 1) The board members select the president of EAA. The president of EAA, through how the bylaws and election process is set up, chooses the board of directors. It is an incestuous relationship that does not have any accountability to the membership. There was a proxy drive organized by memb
ers whose goal is to have a membership direct electronic election of the board of directors. This way we would have some accountability of the board and executive management. (As an example the current system gave the president of EAA 27,000+ votes. There were less than 100 people in attendance voting, and four hundred sixty some proxies collected by a member in the two weeks prior to the convention.)
2) Offensive treatment of volunteers. There was a lot of items cited to show this, however some of the larger ones are tracking numbers on volunteer credentials and the requirement of all the volunteer chairmen to file performance reviews on their volunteers. Now what purpose could a performance review on volunteers serve? It is my personal opinion that no matter how big or small a contribution, if someone wants to donate their time to help better our organization or our convention all I can say is thank you!
3) Again with offensive treatment of volunteers, one of the Airventure Cup volunteers pointed out that he was personally offended when EAA publicly stated that due to liability concerns they would no longer be associated with air racing, and cancelled the Airventure Cup race. (Which did eventually take place as a SARL event.) They even denied ever being associated with the event. Then 2 weeks later, the EAA president was on television and internet news with an AT-6 at the Reno Air Races Pylon Racing School with EAA logos on the tail of the airplane, and EAA logos prominently displayed in related photo and video media.
4) Chalets. Those Chalets took up at least 30 or maybe more prime parking spaces for airplanes. They were exclusive, and something out of reach of most EAA members. One member stood up and said that for the past 35 years he has brought the same homebuilt, that he built to Oshkosh, and is seriously considering not returning due to those chalets. His sentiment was "Nothing says your not welcome like a white picket fence." Another EAA member stated that he has stopped taking his homebuilt to a show near his home base due to similar chalets.

There were about 5 or 10 other people that spoke either to different points or these same ones, but those were the ones that most resonated with me. I feel that EAA members need to spend a bit of time understanding what is going on in their organization and how its executive and board members are held accountable. If you have questions about how the elections of the board of directors works, or how to get in contact with them, email Feedback@eaa.org or rhightower@eaa.org.
My concluding remarks:

Well, for me it's easy.  It never was Hightower, It's not the 'EAA', it's an Experimental Aircraft Association.  You are welcome to use the initials, but please remember what they stand for.

The EAA exists to allow all facets of experimental aviation to be fostered and flourish.  Other organizations, such as the AOPA, are in existence for the purpose of promoting and serving general aviation.  I've been there, and done that, and for the time being, left it behind.

From my point of view, with the economy down, EAA needs to focus on grass roots, low cost, user fulfilled aviation.

(c) 2012 James Wiebe