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.
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?
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).
A few photos of the air screw installed. Moreover, the shape of the spinner appears to be different. The specifications of the blade were also guessed based on the unclear photo. It looks like A and B use different blades and different spinners.
There is no data regarding the tail structure, so we are guessing based on the influence of the skeleton that appears on the outside. The structure of the side radiator is also just a guess as there are only vague photos.
I guessed the structure of the pipe frame considering the weight of the engine. Since it is a racer, there are fewer rubber bushes on the engine mount. I needed a little curve in the frame to avoid the cylinder and supercharger, etc. I emphasized it a little too much, so I plan to fix it. I considered several ideas to connect it to the anchor in the center frame, but this shape was the most reasonable, and moreover, it resembled the frame for Renault’s inverted V engine.
Float position (slightly lowered and the back half slightly thicker. The bottom fin has not been installed yet, so it looks thinner than in the photo))
Adjust the position of the base of the wing
The tail has been made slightly lower and wider both front and rear, and the rudder in particular has been extended rearward while emphasizing its curvature.
The main wing attachment angle was changed from 2.5 to 2.3 degrees.
I’ve gone ahead and sorted out the differences by overlaying the drawings and photos. The lens is about 55mm, give or take. Made a few adjustments like shifting the cockpit forward by roughly 15cm from the drawing and moving the floats back by around 10cm. Also, nudged the back end of the aircraft up by approximately 10 centimeters and dropped the horizontal tail down by about 5cm.