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This will be a somewhat detailed build thread of my Madcow 2.64" Bomarc, with lots of photos .
I purchased it from Madcow during their 20' Black Friday sale, with the help of a $40 gift certificate I received from my 2019 Secret Santa. TY SS .
Note that I deviated significantly from Madcow's instructions, both in order and method of assembly, as well as in the parts used in the construction of this kit.
Planning for this project began back in April of this year (TRF post). Printing parts for the Bomarc began on Aug. 14th (TRF post). And, building commenced on the 28th.
Design of the MC Bomarc's Dorsal Conduit/Tunnel
Construction begins with edge gluing the two plywood wing sections. The plywood is later laminated with balsa sheeting.
Completion of printing dorsal conduit parts, along with laminated wing. PETG was used in all the prints for this project.
More 3D printed parts designed in Fusion 360. Red parts will be integrated into the model, while silver parts are alignment and drill hole jigs.
Installation of motor mount tube (MMT) forward centering ring (CR). The backside of the CR is aligned with the forward end of vertical stabilizer fin slot. BSI 15 minute epoxy was used to secure the CR.
Drill jig for aft airframe section. It was used to locate wing mount screws holes. Red parts in pic are the wing hold-down "anchors". These parts retain the nuts for 6-32 x 0.5" SS flat-head machine screws that will secure the wing to the airframe. The screws replace the wooden dowels that are used in the stock build of the Bomarc.
Next up is the drill jig for the wing. Note that the jig is mounted to the bottom, plywood side of the wing. This prevents the drill bit from splintering the plywood if I had drilled from the top side.
This pic is a dry-fit of the tail section alignment jig. The eyebolt installed in the jig will allow easy removal of said jig
BSI 30 minute epoxy was used to glue the vert. & hor. tail sections together. Jig keeps the tail section square while the epoxy cures.
Continued in next post...
I purchased it from Madcow during their 20' Black Friday sale, with the help of a $40 gift certificate I received from my 2019 Secret Santa. TY SS .
Note that I deviated significantly from Madcow's instructions, both in order and method of assembly, as well as in the parts used in the construction of this kit.
Planning for this project began back in April of this year (TRF post). Printing parts for the Bomarc began on Aug. 14th (TRF post). And, building commenced on the 28th.
Design of the MC Bomarc's Dorsal Conduit/Tunnel
Construction begins with edge gluing the two plywood wing sections. The plywood is later laminated with balsa sheeting.
Completion of printing dorsal conduit parts, along with laminated wing. PETG was used in all the prints for this project.
More 3D printed parts designed in Fusion 360. Red parts will be integrated into the model, while silver parts are alignment and drill hole jigs.
Installation of motor mount tube (MMT) forward centering ring (CR). The backside of the CR is aligned with the forward end of vertical stabilizer fin slot. BSI 15 minute epoxy was used to secure the CR.
Drill jig for aft airframe section. It was used to locate wing mount screws holes. Red parts in pic are the wing hold-down "anchors". These parts retain the nuts for 6-32 x 0.5" SS flat-head machine screws that will secure the wing to the airframe. The screws replace the wooden dowels that are used in the stock build of the Bomarc.
Next up is the drill jig for the wing. Note that the jig is mounted to the bottom, plywood side of the wing. This prevents the drill bit from splintering the plywood if I had drilled from the top side.
This pic is a dry-fit of the tail section alignment jig. The eyebolt installed in the jig will allow easy removal of said jig
BSI 30 minute epoxy was used to glue the vert. & hor. tail sections together. Jig keeps the tail section square while the epoxy cures.
Continued in next post...