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Old 10-04-2017, 06:19 AM
JDA_BTR JDA_BTR is offline
Join Date: Dec 2013
Location: Baton Rouge, LA
Posts: 576
Default Engine Mount Bolts

I haven't riveted the forward top skin yet, and I was looking ahead to the engine mount. One step for putting the mount on is to ream the 6 bolt holes. Currently my bolts fit well in the holes without reaming.

I'm not sure I can shoot the rivets for the top skin with the engine mount on. Especially at the longeron inside, and in the somewhat narrow space on one rivet forward sides. Has anyone done that?

Do I need to ream if the bolt already fits? Or does reaming remove some high spots and have an advantage?

If I did ream it seems I should do it with the top skin done, making the top skin a prerequisite to the engine mount.... Also makes me think I should put the top skin on without the mount per the plans, but with bolts in the holes to keep best alignment.
N1463 seems a good number....

Last edited by JDA_BTR : 10-04-2017 at 06:23 AM.
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Old 10-04-2017, 08:55 AM
bkervaski's Avatar
bkervaski bkervaski is offline
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 720

making the top skin a prerequisite to the engine mount
The top skin gets riveted on 35-22 of the fuse kit, the engine mount is in the finishing kit. I would follow the plans to avoid backing yourself into a corner with the riveting.

I don't see a need to ream if you have good fitting bolts, others may have opinions.
#140376 RV-14A QB IO-390 Thunderbolt
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