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.