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Dimpled the wrong hole club

TASEsq

Well Known Member
Patron
So i am a member of the club - despite planning not to, i have ended up dimpling the top flange on the innermost wing rib on one side (the rib underneath the wing walk doubler) - just the one rib, then i stopped!

I had planned to do this as per the plans and countersink the 0.032" skins, but since i've made this error i am wondering if it would be better to dimple all of the wingwalk doubler ribs, rather than squeeze out these dimples? (Noting that the innermost rib has nutplates for the wing gap cover, i would replace the K1000 nutplates with K1100 nutplates if i kept the dimples there).

The skin stack up at the 4 inboard ribs is:
0.032" Skin
0.025" Wing Walk Doublers
0.032" Wing Rib (or 0.025" wing rib for ribs 2-4).

Now, where the 2 skins meet in the middle of the wing, the stackup is similar (and these are dimpled):
0.025" Outboard Skin
0.032" Inboard Skin
0.025" Wing Rib

To this end, i made up the first stack as per the above, and one side i countersunk and the other dimpled, then cut them in half. Please excuse the quickly formed (and tipped over!) shop heads.

What does everyone think? I am feeling like there would be no issues with dimpling the skins / doublers / ribs as the image below looks like they nest nicely. (note that i used a Cleveland skin dimple for the top layer, and substructure dimples for the 2 lower layers).

Thanks in advance for any advice (especially if you chose to dimple under your wing walk doublers).

nuUqfxoSAN6uvbLI1HXBuqugZn3bZ_ao1Eh_1wViV8TmKTKVeEw_2NuujzX3Sl0CgTX9VoMSNJiMxqrJIVH-tA_WG1iciv8_Cxf9QYobiGhBdQK0AiGTcKWk3Tx7yg4QWs6gFJbMmC3AB45X6wlnufK8EbpYy7QsI7X_o7aK2D03eg7ySLhf9XdH2QuZBx3hzv62QHvx6noH6jJFS22qYOaFUIVgqNvplS_DdF_dfLY6nDq_zalBxAiHGT8ol7M_0RORlyMxyNL0HaWIUgVYk0Smll8ocABC21qbjTp6d1yAWaYZfdl7mqjIUTQb-uX27G2ZWvCfaMOOgofPafeJhgf5qlmjwNigVJz6d8kQtcX0QZD5tMnOmCb5lE68Uy8XK_sng7fSmSwQ5nHQojA7pN4VMA55rqOH0xkywIOH9EiUMFWSpZIoZK_2WZPU4wvqupmzN-LAmqLwpVhi38nC75ZZBZVXcrOscrlAYyEy31Jsrc_Mcs4U0JLkhsl8BCpRxkzSlQuz-zasCx7Ny-AsBlCzurPinmnx1xYBBCrOkMwAPPYDYH5jpsj4Xl7Md9oti0G_zOKZC16C3ayLz0Xyl2uvpIsSO8WB1xnHbq3_tMSsz1vbuxhBVPEnASQ2eL7kLBb-FCisT7MFjbmv2p9cfH4-HbUcJsQEFYhcsc4qERrMhzWwMxxLBsnPdXOLlg=w600-tmp.jpg

https://photos.app.goo.gl/8RybvooxXuvSBVcAA

erszuse2D8VZoWctU1ujuKSzkeS82A3KDR4j1I-0Z7KP51XhDqEspVEwOGDyUgB9A0k7y79U2RnCh4gSKIgHWdL5NNNbhy1eh_iKLrAbWl3c2pW9LJymZwhhLGvP9XzpVfgRadq31t9o-eAZ5GxZRis_EpWSGP3jX39BBs7SlJCmYpnUV4wDHNn3rfIU5sthaqePIhT4_oMLZjfhoms7qyW_gK3yjS3gXpcYO97GIfntdxv-LmawA4Hmk1mXb4PnsvzoHoNRtaHbwzH1kQSs9v88cMxROAKbHKViPV4Ny7NBKefmgKt09JHYuwrH86doHPwDexK_XK7t2ntCUkqufqIbOw0eCigjLI9DdPA9wE_AfzWqhzOjdzq02Zc4I9Jo41jucWXvVv7VMhkjCGW4rK44wPp_8cThsMQ2o4Wl6alYxB5Rn1Z46L60NuxyTjDxXH3yZfv6LnX2w-MdqTZlXhqyWOg_WAtmSzoFsK50LuVmHuHQNmSlBOvA45WWK9w3sh6wMrXzD8qPeWfIAC6OuiMNrptr4Ak0xuq7tN_hmqqZr-aP47Fplg4MyGbdTZ0Jt7ajzG77-HfQJge3cbpeL83RwOSafQuSTJ8jhyQ6UUAkNT582J1ECc3f1NXN47UIXxE2VJzX-3b8EC2Lrxth1c19NAecI4d-kThY6MBo_vjeYKEwFSbGjAYBVkDYdg=w600-tmp.jpg

https://photos.app.goo.gl/puuvoDx5q6XXPGqt7
 
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I countersunk the top skins (in the doubler area) leaving the rivet heads slightly proud (due to skin thickness) per the plans. If I were doing it again, I would go the dimple route without hesitation..especially after seeing your photos. I now have slightly proud rivet heads that I may or may not have to deal with. My guess is the plans call for countersinking because the skin is slightly thick for dimpling. Maybe with a C-Frame (never used one for dimpling so not sure), but would be no issue with the DRDT-2.
 
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Thank you,

I?m 50/50 on how to proceed honestly. Don?t want to flatten that many dimples really but on further consideration i realise the holes where the screws go for the wing root fairing will need to be countersunk anyway - so thinking about just flattening those holes and moving on. I can work out what to do with the rest of the ribs at a later date - easy enough to dimple later.
 
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