LSA Rib attach angle rivet sizes

[Frank]

LSA dumb questions maybe - the plans are succinct - but you can't be too careful.

1. The rib attach angles are fastened to the ribs using MS20470AD3 rivets? (see attached)

2. Rib attach angles at stations #16 thru tip rib (where there is no cap strip) use MS20470AD5 for the top and bottom rivets? (see attached)​

 

[RobinDeMarco]

Frank, that’s how I read it. Hopefully someone who has the experience will respond.

 

[ScottS]

Frank, Is there a cap strip on the back side that’s not shown in that view?
scott

 

[Frank]

No, the cap strips terminate and then there are four rib stations with angle-web-angle contact.

 

[geraldmorrissey]

Did you make the callouts in red or did Bob? I see no need for -5 rivets in those locations. The Patrol dwg has no specfic callout for those locations, however there is a "typ" callout noted for general attach angle to spar fastenings. I installed -4's at those locations. If Bob made those callouts then build per print.
Gerry

 

[Frank]

I made the callouts in red, to confirm what i think the plans call for.

In the one case, "use AD5 full length of spar" is specified, so I guess that is unambiguous (even if unnecessary).

In the other case, AD3 is specified for rib stiffener angles. I think I am to assume that also applies to attach angles. But since the stiffeners are 1/2 and the attach angles are 9/16 and edge distance in the drawing is 1/4, I am just wondering if AD4 would be appropriate.

I'm trying to work this out with Bob via email but I screwed up the labeling so he thought the question was 426 versus 470, leaving the diameter question unresolved. Sometimes I can scramble up a simple question!

 

[geraldmorrissey]

Hang in there Frank. Maybe a QB builder will chime in. A couple of pictures would solve the issue. If it's anything like the Patrol, all rib attach angles common to the spar with no capstrip, -4. C/T the ribs -3.
Gerry

 

[David Swartzendruber]

Frank,
Here are some pictures of my QB wings. You'll see that the angle to rib rivets are AD3 as you said and the angle to spar web rivets are AD4 when no spar cap is involved. I included a picture of a bay with spar cap so you can see the rivet goes up to AD5 through the spar cap.
David

 

[Frank]

Many thanks David! That answers a couple of questions for sure! It is good to know AD3 is used to fasten the ribs to the angles, that was my main concern given the angles are sized to accomodate larger rivets.

So almost all of the angles are fastened to spar and rib using three diameters of rivet, not to mention the various lengths. Such a fun puzzle it is!

Again, I thank you for resolving this particular dilemma.

Here's a photo of my main spar slice area currently. I followed BTAZ's example and made a one-piece filler plate/rib spacer.

I've also started making blanks for the attach angles and a drilling jig for the AD3 holes.