This reminds me of the Guillow's balsa and tissue airplanes I built in my teens.
A full view of the assembly so far. The two "Y" stringers are on the top, the "Z" stringers are on the bottom.
The interior formers haven't been glued to the tube yet. I wanted to have the ability to slide things until the stringers were tack glued in place.
Notice the stringer tops sit higher over the M form. You would think the notch fit would be even like over the S and T formers. The card stock outer skin doesn't contact the curved sides of the M, S and T formers.
The V pieces are glued into the slots in the T piece.
Stringers standing slightly proud of the formers is fairly common in balsawood-and-tissue model aeroplanes construction. Typically the only formers that come in contact with the covering would be those where you'd be anchoring the covering material -- so it's not uncommon to see any intermediate formers to have stringers protruding outside it, or sections of formers between the stringers to be "scalloped" -- to avoid some of the "skin-and-bones" appearance (where ribs or formers protrude slightly) when the covering material is shrunk taut.
ReplyDeleteHi naoto,
DeleteThe curves are subtle - the reason I brought it up was so the builder wouldn't square them up (sand them off) with a block. The old Guillow's formers didn't have the curved recesses.
Speaking of model aeroplanes... the structure of the Asteroid Hunter kit reminds me of the "Tube-O-Matic" fuselage construction featured in some Comet kits. I vaguely recall this was usually coupled with the "Super-X" construction for wings.
ReplyDeleteAn example of the "Tube-O-Matic" and "Super-X" can be seen here:
ReplyDeletehttps://outerzone.co.uk/plan_details.asp?ID=8131