Background, I got into a discussion about the effects of additional weight on a flywheel for a 2-stroke dirt bike.
It comes down to the placement of the weight.
- Take the crankshaft, horizontally and the rotation of it and the flywheel added to the end of the crankshaft.
- Add weight to the flywheel, do not change the circumference location just add say 8.6oz.
- One company is stating that the longitudinal location of the weight will increase or decrease the effect of the weight. So, take the crankshaft center (lengthwise) and take that same 8.6oz weight and move from center (lengthwise) out towards the end of the crankshaft. It is stated that the same 8.6oz weight will have the effect of an 11oz weight when moved closer to the center (lengthwise).
My question is, how much of an effect does this really have. The weight spins with the crankshaft and the crankshaft is supported by two (2) bearings. The crankshaft is not straight, it has two lobes and a wrist pin with piston that experiences impulses every stroke, intake and exhaust.
- Are "they" correct in their claims or are the variables enough to cancel out any effects?
- How much change or effect will an 8oz weight have at say 5.5" from the center (lengthwise) moved in to 5" from the center (Lengthwise) have?
- Do the bearings supporting the crankshaft change the effect of the weight and the "center" of the crankshaft? In other words, does the bearing support act as a new center location for rotating mass?
Thanks
It comes down to the placement of the weight.
- Take the crankshaft, horizontally and the rotation of it and the flywheel added to the end of the crankshaft.
- Add weight to the flywheel, do not change the circumference location just add say 8.6oz.
- One company is stating that the longitudinal location of the weight will increase or decrease the effect of the weight. So, take the crankshaft center (lengthwise) and take that same 8.6oz weight and move from center (lengthwise) out towards the end of the crankshaft. It is stated that the same 8.6oz weight will have the effect of an 11oz weight when moved closer to the center (lengthwise).
My question is, how much of an effect does this really have. The weight spins with the crankshaft and the crankshaft is supported by two (2) bearings. The crankshaft is not straight, it has two lobes and a wrist pin with piston that experiences impulses every stroke, intake and exhaust.
- Are "they" correct in their claims or are the variables enough to cancel out any effects?
- How much change or effect will an 8oz weight have at say 5.5" from the center (lengthwise) moved in to 5" from the center (Lengthwise) have?
- Do the bearings supporting the crankshaft change the effect of the weight and the "center" of the crankshaft? In other words, does the bearing support act as a new center location for rotating mass?
Thanks