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| Manxmodder:
David, I somehow missed your latest developments and most recent posts on changes to the flywheel end. Anyway,yes she's definitely gonna be a prettier looking engine with the double flywheels. Nice work ......OZ. :clap: :clap: |
| Stilldrillin:
Frazer, OZ. Much appreciated. Thanks fellas! :thumbup: I've started work on the crank discs. Two off, 3" square x 10mm blanks. And aching arms....... Topped, to 68mm o/d........ Skimmed. Finished at 3/8" thick........ Sleevelocked, sleeves. To increased shaft location length...... Drilled/ reamed 6mm, for silver steel shaft. Sleeves topped to 8mm dia. No discernible wobble, when spun on shaft....... Time to make 'em look like crank discs! If I mill away to centre line, as usual, (l/h disc). I guess the assembly would be "over balanced". The r/h disk seems more, functional. The present c/i piston and rod assembly, weighs 63gms. Is there a quick n dirty, simple formula. Which I could understand. To calculate how much weight to remove from big end area? David D |
| tom osselton:
You could try this, I bookmarked it last year but have not tryed it out. http://modelenginenews.org/etw/etw_bal/p2.html |
| Stilldrillin:
Tom. Thanks very much! I can work with that. (And the digital kitchen scales)....... :beer: I've been steadily reducing the flywheel's 1" wide rims. Not wanting to overdo it....... Now, down to 5/8" wide....... I think they look about right. Anyone care to comment? I can still take more off......... :thumbup: David D |
| Manxmodder:
David,massive improvement,they look tremendous. :clap: :clap: Proportionally to the rest of the engine they look grand,but also I think if they're thinned down any further you may start to loose the depth proportion of the radius on the cast section of the rim webs. It's your decision but I think she'll look mighty when the crank is in and the flywheel centres are painted. Looking forward to the next installation. :thumbup:.......OZ. |
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