Not much accomplished today, I woke up watched some of the talking heads and then the Indy 500. I went ahead and installed the roll servo bracket in the right wing since I don’t think Dynon will go to the trouble to fix the hole location since it is not off by much and there have been no other complaints.
I then moved onto the cooling air ramp. Due to a timely topic on VAF, I discovered that a shim is needed under the forward part of the cooling air ramp. The instructions do not direct you to do this, in fact it has you counter sink and dimple the layers in this area as if you are not going to need the shim. The problem is the floor ribs are where the outer two rivets go and that rib is .063 thick, you have to shim between the ribs where the ramp attaches to the flange on the firewall. This would cause a fairly good stress area without the shim. On my QB the holes are dimpled IAW the plans so I have to make a shim that will nest into these dimples. If you are slow building don’t dimple or countersink these layers, make the .063 shim and machine counter sink the shim to take the dimples from the ramp. A friend suggested two shims of .032 each; this would fill the .063 void. I did not have any .032 so I used .025. My logic is the plans call for putting proseal in this area and that will take of some space as well. On top of that I will prime the shims with a filler primer that is fairly thick. The final product looks like it will work out fine. I am now ready to rivet this sucker on when I get back from my next trip.
I finished up the day with a few nit noid items, and called it a day.
Looking aft forward. Nested shims between floor ribs, you can see the right rib.
Fron of ramp at the firewall. Rib is on the left, you can see the shim layer to the right.
