| Hangar |
Aircraft |
Category |
Date |
Preview |
| John M Oshust | ManzanoLaser Royal Aircraft Factory B.E.12a | Build | 24-Mar-14 12:39 |  |
| Views : 421 |
| This stage complete, on to the other cylinder bank. |
| John M Oshust | ManzanoLaser Royal Aircraft Factory B.E.12a | Build | 23-Mar-14 17:26 |  |
| Views : 464 |
| The Gumster torques a bolt for a cylinder test fit. He fabricated a new crankcase today and the redesign worked better than expected. |
| John M Oshust | ManzanoLaser Royal Aircraft Factory B.E.12a | Build | 23-Mar-14 17:25 |  |
| Views : 391 |
| The basic shaping of the cylinder set is not yet completed but Gumby put a quick coat of paint on them and hastily installed them into the crankcase for a “look see”. He has been at engine construction for over a week and there is quite a bit of work remaining. That’s why I pay him well over minimum wage. Model fabrication pays better than making burgers at Burger King! |
| John M Oshust | ManzanoLaser Royal Aircraft Factory B.E.12a | Parked | 22-Mar-14 17:46 |  |
| Views : 448 |
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| John M Oshust | ManzanoLaser Royal Aircraft Factory B.E.12a | Build | 22-Mar-14 17:45 |  |
| Views : 389 |
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| John M Oshust | ManzanoLaser Royal Aircraft Factory B.E.12a | Build | 22-Mar-14 17:45 |  |
| Views : 392 |
| 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, |
