Progress Report

It’s about time to start making the main wings, but I don’t know the shape of the ribs, let alone how many there should be. I have no idea about the structure of the spars or the cooling system circuit, and so on, so I’m hesitant to move forward.

そろそろ主翼を作るべきタイミングなのですが、リブの形状はおろか本数もわからない。スパーの構造・冷却水の回路などもまったくわからないので二の足を踏んでいます。

Progress Report / February 2, 2025

Progress Report

  • Addition of the front radiator and associated piping.
  • Addition of auxiliary components around the engine.
  • Incorporation of finer details.
  • Fine-tuning of the framework.
  • The piping is currently in a provisional assembly stage and is expected to undergo significant revisions moving forward.

●主な作業前部ラジエータの追加とそれに付随する配管の追加
●エンジン回りの補機類の追加
●細部のディテールの追加
●フレームワークの微調整
●配管は仮組みです今後かなり修正されると想定しています

progress

  • Addition of a propeller hub
  • Integration of engine accessories
  • Structural modifications to the horizontal stabilizer
  • Darkening of the frame’s interior color to align more closely with the impression conveyed by period photographs
  • Enhancement of details on the front tank
  • Numerous other adjustments and refinements across various components

●プロペラハブを追加
●エンジンの補機類を追加
●水平尾翼の構造修正
●フレームのインテリアカラーを当時の写真の印象に近づくように暗くした
●前部のタンクのディテールを追加した
●その他細部の調整・修正は多岐にわたります

Hypothesis about rear carburetor location and air intake

In a higher-resolution drawing I received from a friend years ago, I found what I believe to be the rear carburetor for the central row. While the connection to the engine is omitted, the fuel lines can still be traced. That said, a carburetor placed in such a spot without an air intake would likely rely on air drawn through the heat-dissipation slits. But could it really maintain a balanced workload with the front carburetors, which have proper intakes? The setup must have required incredibly delicate tuning. Then it hit me! The hole at the tip of the M67 propeller hub, combined with the propeller hub design reminiscent of a jet engine’s compressor fins—could this structure actually be intended to provide pressurized air for the rear carburetors?

むかし友人にもらったより高精細の図面に中央列の後部キャブレターと推測されるものを見つけた。エンジンへの接続は省略されているが燃料パイプはたどれます。ただこんな場所にエアインテークもナシで配置されたキャブレターは、排熱スリットから吸気されるだろうが…インテークのある前側との仕事量のバランスは取れるのだろうか…神経質なセッティングが必要だろうな、などと考えていた時ひらめいた。M67のプロペラハブの先端にある穴+ジェットエンジンの圧縮フィンを想起させるプロペラハブの意匠。これらは後部キャブのための加圧した空気の取り入れのための構造なのではないだろうか?

Consideration of the Macchi M.67’s instrument panel

Compared to the few photographs that show the instrument panel of an actual racer, the one in the museum looks different.

My thoughts on adjusting the instrument positions to match the photo.
The shape of the upper panel was also changed to match the photograph.I believe the empty space on the bottom panel would be a good place to mount a kill switch lever or pump lever (for now).