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Dry ice and brittle fracture
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Bolt length
Gang, I'm trying to set or equal the record for the longest-running RV-6A project in my area :rolleyes:. Consequently, my wings were completed many many years ago and I don't seem to have all of the AN3 wing bolts I'm supposed to have (52). Luckily, I still have all my close-tolerance bolts. Drawing 15 mentions the bolt size (AN3), but doesn't mention the grip length. Is there any reliable way to determine what lengths I will need? I'm assuming some will need to be a bit longer because of the gear clusters.
Thanks. Jim |
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The easiest way to determine any bolt grip length "on the fly" is to simply tape over one end of a spar hole. Then insert a pencil or a dowel through the spar (and any other part such as a weldment) until it stops at the tape. Then mark or notch the opposite end of the dowel flush with the spar surface. This mark will give you an indication of the total length through the material. Now remove the freshly marked dowel and place it alongside an AN bolt comparing its marked "grip length" with that of an AN bolt minus its bolt head and the threads. This will get you in the ballpark without knowing in advance the precise length bolt needed. |
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