Aiki_Aviator
Well Known Member
Hi All, I am wondering if someone could clarify an instruction in the plans relating to the QB fuse and its attachment to the tailcone. ![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Step 8 states:
"Remove the F-1074 Tailcone Forward Topskin. {OK, got that} Machine countersink the holes in the F-1070-L and -R mid-side skins and the F-1046-L and -R Mid Fuse longerons as instructed in Figure 3.
Now I understand the countersinking the Shim, and even the 1 hole under F-1074 on the F1070-L/R skins ready for dimpled top skin (F-1074), however, how can I get to the longerons under F1070-L/R to both countersink and then dimple??
Is that a mistake including Longerons in the countersink list, (i.e. is it countersinking the skin all the way along to the existing QB rivets??)
Am I missing something simple??
Items on the attached pictures:
A - Rivets already existing in the QB Fuse into the longerons (already countersunk.
B - Holes, I believe, needing to be countersunk in the longerons and dimpled in the skin F-1070-L/R.
C - 3 holes needing countersinking ready for skin dimples
D - Holes, I believe needing to be countersunk (longeron) and dimpled (skin)
If this is correct, how do I get at the Longerons to countersink? Do I need to drill out a whole lot of rivets??
Any help greatly appreciated.
Step 8 states:
"Remove the F-1074 Tailcone Forward Topskin. {OK, got that} Machine countersink the holes in the F-1070-L and -R mid-side skins and the F-1046-L and -R Mid Fuse longerons as instructed in Figure 3.
Now I understand the countersinking the Shim, and even the 1 hole under F-1074 on the F1070-L/R skins ready for dimpled top skin (F-1074), however, how can I get to the longerons under F1070-L/R to both countersink and then dimple??
Is that a mistake including Longerons in the countersink list, (i.e. is it countersinking the skin all the way along to the existing QB rivets??)
Am I missing something simple??
Items on the attached pictures:
A - Rivets already existing in the QB Fuse into the longerons (already countersunk.
B - Holes, I believe, needing to be countersunk in the longerons and dimpled in the skin F-1070-L/R.
![IMAG0428.jpg](/proxy.php?image=http%3A%2F%2Fweb.aanet.com.au%2F%7Ealong%2FDownloads%2FGeneral%2FIMAG0428.jpg&hash=aa1f1b231a2e8a4914f6ec375f9681a7)
C - 3 holes needing countersinking ready for skin dimples
D - Holes, I believe needing to be countersunk (longeron) and dimpled (skin)
![IMAG0429.jpg](/proxy.php?image=http%3A%2F%2Fweb.aanet.com.au%2F%7Ealong%2FDownloads%2FGeneral%2FIMAG0429.jpg&hash=27947caa3b3b2f5724688b3f46efd2a7)
If this is correct, how do I get at the Longerons to countersink? Do I need to drill out a whole lot of rivets??
Any help greatly appreciated.
Last edited: