Veco .21 engine restoration and first run (excelent sound!) скачать в хорошем качестве

Veco .21 engine restoration and first run (excelent sound!)

Prepare for an excelent and 16 minute long first run of the restored Veco. This Veco .21 engine from the early 1980's has had a tough life but was well maintained. The engine was missing an exhaust but it did came with a brand new cooling head. The Dykes type piston ring was worn out aswell as the bearings. The lack of an exhaust suggests to me that the engine was used for an aeroplane, while the original cooling head was missing too. These engines were popular amongst aeroplane enthousiasts and were dual purpose; they could be transformed to a car egine by adding the correct cooling head and exhaust. Because of the piston's deflector, the engine also ran perfectly without the weight of an exhaust. Weight is unwanted on an aeroplane. Instead, they usually used a rotating exhaust valve linked with the carburetor. The Veco shares it's internals with the HB .21 engine but used a steel cylinder sleeve, while the more expensive HB used a chrome plated one. Other differences were the smaller carburetor (the HB used a Perry carburetor with a larger diameter) and different crank case. Other characteristics are; the piston has a deflector on it. This deflects the fresh gasses upwards.The transfer ports are directly pointed to the exhaust port, the deflector prevents the fresh gas to escape through the exhaust port. Once the fresh gasses reach the top, they swirl downwards to push out the exhaust gasses. Once the piston closes the exhaust port, the compression and combustion cycle begins. One could say that the deflector does the same thing as the modern expansion exhaust; keeping the fresh gasses where they should be. This Veco has an exhaust, which is also the same as the HB one, with a very large tailpipe diameter. The reason is, the engine doesn't need an expansion exhaust because of the piston's deflector. The dissadvantage is the extra weight of the piston and an inefficient scavenging at low rpm (idle). The Veco however, is surprisingly stable at idle and doesn't choke itself when the throttle is applied, even after a couple of minutes of idling (if this engine can idle for this long at these low temperatures, any engine can). Outside temperature was close to freezing point.The throttle response is excelent and the sound is deep, crisp and loud (a noise reducer was used to create a more realistic and natural sound). One other aspect worth mentioning is the piston ring. The Dykes type ring is designed to enhance the compression and decrease any leakage. The fact that the piston was clean below the piston ring proves it's working flawlessly. The pressure during compression and combustion press the ring to the cylinder sleeve. Only recently new piston rings are available, which suggests to me that the original one was at least 25~30 years old. All in all, a very pleasant and durable engine with loads of personallity. Take special notice at the 12 minute mark. The exhaust at that point is flooded and runs over. This is caused by the very long idle and inefficient scavenging. The fuel is 2 years old, 20% HPI. The glowplug is an HPI R5. Engine specifications: Displacement: 3,48cc (0,21 cubic inches). Bore x stroke: 16,6 x 16,1 Poweroutput (kW) bhp: 0,83 (0,61) @ 28.000 rpm with 5% nitromethane. Practical rpm range: 3.000 ~28.000 Enjoy! Check out my playlists:    • RC Car Buggy Truck      • Vintage RC cars      • Electric RC cars      • Sand Scorcher videos!   Link to my Pinterest page:   / sparrowracing   Please rate, comment, share. Please contact me if you want to use this video or parts of it!