Once again I’ll add some of my interest and dealings. I built a 1/5 give or take scale model of a Corsair. f4u-1d. At the time I debated whether to make it an F2 G . It would have allowed adding about an inch to the nose. Which would have been easy just by moving the cowl forward. I hsdnot completed it at the time so I was unsure how much nose weight it needed or where to put it. It had a very nice blend of radius just behind the cowl that I think really helped reduce drag. I say this as it was considerably faster than the zero of the same scale and every bit as fast as the bearcat. Adding the inch rudder extension would have helped handling too. I didn’t know this at the time as big scale Corsairs were not popular then. I finally ran across a guy with the exact same plan set but he had done the conversion. He had a slightly more powerful engine however being a semi pro drag racer I managed to wring out more power out of my motor than Mose at the time. His plane had more gap around the cowl so the cowl flaps were more out in the breeze. I was into fluid dynamics then at my job so I did do some analysis of this. I was the only one using this software where I worked so I didn’t have anyone to challenge my results. Directly. Another guy had a Sea Fury of the same scale and in a simulated pylon race I couldn’t get away from him but he couldn’t pass me either. Thinking back had I left the 3 pounds off and re radiused the nose of the fuselage. I think the speed would have been even better. The plane weighed 38 pounds so 3 pounds would have been very significant. The plane flew very much like the full size lots of right rudder on take off. Interesting ly in talking to my father in law who flew thes during the war noted a special flaf setting for combat. He said he never really understood the theory of it but it did allow very high degree turns. I added a flap setting to simulate this . One of the scale manuvers required in scale flight demos in contests was a very high g sustained turn. Full size hav special instrumentation for this. It enabled the Corsair to out fly the zero under exacting conditions Other than zoom and boom. I practiced with this quite a bit and won 5 events so became the club “ace” The scale zero was not even in out league once I got this down. Pilot turns were spectacular with my extra speed. I never entered the warbird pylon races but it would have been competitive I feel. I flew this plane for 13 years before retiring it due to my health issues. It still exist in my son’s closet. Anyway I always wanted to try the bigger engine as I was sure I could coax more power than most out of it but they were just too expensive then.I to have a Pashto also interest intert in this engine. I would enjoy trading email and thoughts. Post if you would like to participate. I’ll try and watch here daily
I recently noted that the 4360 began experiencing bearing failure after high g turns so it was something else to add to this “major engine. It apparently was solved but not really put to the test in high performance fighters.
I have some ideas on the crankshaft construction since I don’t think the model could develope the dynamics of the full size as the relative strength of it doesn’t really ”scale”. A model just couldn’t develope the kenitic energy by vibration the way the full size did.
I’ll have plans in a week or so for the 18 cyl so I’ll start cad models from them an work in parallel with the 28 cyl. Model. It’s very complicated in model size let alone manufacture or build it. A scale plastic model is my dream for shop” for now. My. Hodgson will probably have to black my calls as he knows more about thes than I’ll ever forget.