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Main Menu Home About Browse images Signup Lost password? News Links Help User Login User Name Password View By Hangar View By Aircraft ManzanoLaser Royal Aircraft Factory B.E.12a View Details View All Switch Aircraft Users Aircraft John M Oshust

ManzanoLaser Royal Aircraft Factory B.E.12a by John M Oshust. Viewed 323 times. Build Thread Next Prev Click image to return. Image Comments John M Oshust 22-Mar-14 17:45 Good news/bad news....well not too bad of news! The GOOD: The cylinder assembly is progressing. I have a prototype of a valve mechanism in mind and one cylinder has a rocker arm valve stem and spring. My valve springs will be represented by coil springs. The real thing uses a spiral spring similar to a coiled inclined plane. A spring of this design is beyond my spring winding skill level. The BAD: The slightly modified kit crankcase is destined for the scrapheap. I extended it a tad to accommodate a more realistic cylinder array, but I did not extend it enough. I should have extended to the end of the fuse frame...live and learn. Fabricating a new, closer to scale, crankcase should not be a problem and actually it will make adding magnetos, spark plug wires, intake manifold, fuel lines, and the behemoth exhaust stacks a bit easier. Further cylinder assembly on hold until a suitable crankcase can be designed and constructed. I discovered an interesting fact regarding this engine. A lack of redundancy. While it used two magnetos, it had only 12 spark plugs. Each magneto servicing six cylinders, Please sign in to comment on this image.