Replies to This Discussion

Permalink Reply by Jim Belcher on December 6, 2009 at 11:02am

An idea for consideration: Would there be any merit to splitting the upgrade kit into two parts, maybe one with the parts for the fuselage and elevator, and the other for the wings? I doubt most of us are going to tackle both the wings and fuselage at the same time; we might be able to make some progress if we had one set of parts or the other.

I'm sure this would create some logistics considerations at Zenith, and I don't doubt it would up the shipping costs. But I for one would be willing to pay a little extra if I could get started sooner.

Since I have no idea how rapidly Zenith can produce parts, it may or may not be a good idea. If Zenith can produce a full shipset of parts for everybody very rapidly, then the idea may be pointless.

Permalink Reply by Matt Heintz on December 6, 2009 at 6:09pm

Jim,
I think that Zenith is also looking into that. However, my understanding is that they are almost done all the parts for 500 kits.

Permalink Reply by Larry Whitlow on December 6, 2009 at 5:03pm

Mathieu

Looking at 6-ZU-2-4 The spar uprights I have the dual stick option and I see that one set of the spar uprights is now where the uprights are when you install the dual stick kit. In essence my center spar had the four front uprights and just need the back ones correct??

Will I just use those uprights already made for the dual stick option over again??

On another note, you stated in an earlier post, we could use a .125 extrusion for 6-ZU-2-6. Before I removed them to get the center spar out one issue I had was getting the original uprights tight to the spar. They would pull down just fine with the bolts, but I had a devil of a time getting the holes right for the wing bolts. I was sure i was going to have difficulties getting the bolts in when I mounted the wings because of that. Upon examination of the removed upright I noticed that the reason it would not lay completely flat against the spar was that it had bent over bent by a couple of degrees. the plans called for 85 deg and my protractor said mine were 87-88. Not much at all but it was just enough to make the bolts hard to get through. I'm not sure if it should be this way, Are the bolts supposed to be so tight to make it difficult to get them through the spar upright holes?? I had to use a hammer to tap (hard taps) the pathfinder bolts into place and a hammer to get them out.

I would suppose the extrusion might eliminate that issue. or would it be a different issue since the extrusions are 90 degs??

Can / Should I even consider replacing any of the uprights with the extrusion?? and does anyone know of a source for this extrusion?

Larry

Permalink Reply by Matt Heintz on December 6, 2009 at 6:19pm

Larry,
Yes, with the dual sticks, you already have the front uprights. Just add the rear.

With 6-ZU-2-6 being an extrusion, it will be harder to install. However, we are adding 5 A5 rivets from the upright into the spar web, so the extrusion will be tight to the spar.

Having snug bots is the best. If too tight and you have to use a large hammer to put the bolts in, there is a good chance that the reamed holes will get damaged.

The only reason you would want to use the extrusion instead of the bent 0.0125 plate would be because you are making your own upgrade kit parts and cannot bend the plate.

Permalink Reply by Matt Heintz on December 6, 2009 at 6:21pm

To all,
I will be on the road for the next 3 weeks but will be continuing this Q&A. Please have some patience if I do not answer as quickly.
Thanks very much.

Permalink Reply by Larry Whitlow on December 6, 2009 at 6:36pm

Thanks Got it Stick with the mod parts

Larry

Permalink Reply by Chris Sinfield on December 6, 2009 at 7:57pm

Mathieu
this Q from the other closed list was your answer which stated to ADD the other uprights to the front spar
for the duel stick mod which is different from your current answer.

Mathieu
I have the Dual stick system I already have 2 spar uprights on the front spar box to support the flight controls at 288mm and AN4 bolts only at 189mm. Do I now need the other 2 inboard uprights at 189 on the front with a total of 4.?
Chris Sinfield
Australia

Reply by Mathieu Heintz on November 12, 2009 at 8:01am
Yes, you need to add the spar uprights 6-ZU-2-3, front and rear. Top and bottom are bolted, with rivets into the spar web.

Permalink Reply by Larry Whitlow on December 6, 2009 at 9:25pm

Chris

My Center section came from the factory with two uprights at the 189 position (nov 2005) I added two for the dual stick mod at the 288 position However these did not have bolts that went all the way through the spar only the web and front cap

The drawings show now that the bolts go through with spacers inside. So apart comes the spar

When did you get your spars??

Larry

Permalink Reply by Chris Sinfield on December 7, 2009 at 5:26am

Larry
My Spars were made in June 2006 as per center wing spar drawings 6-W-4 of 10/04 My bolts at 189 position go all the way through but my Dual stick uprights at 288 are like yours and need to be drilled all the way through to the rear side and a spacer added, as it only clamps the front spar and cap. So in fact we need to add a total of 3 uprights I guess. Except did Mathiu said not to add the second frount ones or not at 189 position?

Permalink Reply by Larry Whitlow on December 7, 2009 at 6:42am

Chris

I think the reply from Mathieu to my question tells the tale we will need to install the 189 and the 288 front and back for a total of eight uprights 4 in front and 4 in back

My question was simply about re-using the one that already had the holes drilled for dual stick mounts

HTH

Larry

Permalink Reply by Matt Heintz on December 8, 2009 at 8:55am

Chris,
To be 100% clear about the uprights, it is our recommendation that you need exactly what we have on the drawings. If you already have the upright for the dual stick with the holes in them, they are perfectly fine.

Permalink Reply by Larry Whitlow on December 6, 2009 at 5:07pm

Matheiu

A question on the elevator

I've seen it mentioned by you and others that there might be an elevator mod. Are there draft drawings yet?? Will it be more than the L stiffeners around the trim servo similar to the aileron?

Inquiring minds want to know!!!

Larry

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