Honeycomb Bobbins

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    • November 6, 2021 at 20:33 #16456
      Richard Harrison
      Participant

      What is the best tool(s) to use for the installation of the honeycomb bobbins?
      I am adding the boarding assist handles on the sides of the Yankee like I have on the AA-1B. Looking for the best tool to clean out the honeycomb material in the 1/2″ hole without damaging the outer skin.

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    • November 7, 2021 at 07:40 #16460
      Roscoe Rosché
      Keymaster

      I used an end mill cutter, it is round and cuts on the end flutes. Set the depth and out came the honeycomb bits.
      I have also used a bigger flat screwdriver to achieve something similar.

    • November 7, 2021 at 13:36 #16464
      Richard Harrison
      Participant

      Something like this? I just walked over to the EAA Clubhouse and found these in the tool room.

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    • November 8, 2021 at 13:56 #16473
      Richard Harrison
      Participant

      That worked out well. Once the inside hole was opened up to 1/2″, it only took a couple of seconds with the grinder to clean out the honeycomb material. Then a small slotted blade screwdriver to knock loose small pieces still holding on to the outside skin. Blew out and vacuumed the holes. Bobbins then installed flush, I had to add a thin washer to make up for the thickness of the rail mounting plate that rivites to the inside of the honeycomb.

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