Z-EDD
Well Known Member
Outboard Floor stiffeners and F-684 Gussets
IMG_0863 by Ed Fleming, on Flickr
To fit the outboard floor stiffeners I drilled them fore and aft first. Then I could use those two holes to hold them in position for match drilling to the skin.
IMG_0838 by Ed Fleming, on Flickr
Here is the successful left F-684 Gusset. These took some time to fit correctly and they are an edge distance minefield!! Firstly the bending is not really as shown on the plans. They need a bend right below where the firewall angle ends to fit properly. The other issue is that aft lower hole. It is critical in edge distance on two sides. You need to keep it as far forward as possible to make it easier to drill the forward edge to the firewall angle. This is also the hole that is critical on the aux longeron. I got all this right on the first one.
IMG_0836 by Ed Fleming, on Flickr
But then got this problem on the firewall angle. Don't lay out and drill the holes in the gusset until you mark where the firewall angle ends! This was my only replacement part in this section. Thank goodness I didn't drill the firewall!
IMG_0863 by Ed Fleming, on Flickr
To fit the outboard floor stiffeners I drilled them fore and aft first. Then I could use those two holes to hold them in position for match drilling to the skin.
IMG_0838 by Ed Fleming, on Flickr
Here is the successful left F-684 Gusset. These took some time to fit correctly and they are an edge distance minefield!! Firstly the bending is not really as shown on the plans. They need a bend right below where the firewall angle ends to fit properly. The other issue is that aft lower hole. It is critical in edge distance on two sides. You need to keep it as far forward as possible to make it easier to drill the forward edge to the firewall angle. This is also the hole that is critical on the aux longeron. I got all this right on the first one.
IMG_0836 by Ed Fleming, on Flickr
But then got this problem on the firewall angle. Don't lay out and drill the holes in the gusset until you mark where the firewall angle ends! This was my only replacement part in this section. Thank goodness I didn't drill the firewall!
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