Author Topic: crankcase vol. (no drilling involved)  (Read 2123 times)

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Offline 1manband

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Re: crankcase vol. (no drilling involved)
« Reply #60 on: March 11, 2016, 06:33:49 pm »
now here is a head scratcher.

same saw.

first saw graph = estimated t*a DR
2nd graph = estimated crankcase DR

peak rpm points are chosen.  best guess.  disregarding the differing number values........due to these being estimates.

the t*a peak rpm is pretty close to what it actually is, imo, because it matched up with blair recommendation t*a values for that size motor at that rpm.

the crankcase peak rpm, may or may not be at the right rpm point.  my best guess is that it is somewhere between peak tq and peak hp rpm.  saw specs say 8300 hp peak, 11400(max) ? if i remember right.
somewhere it gets air to run up there.

if t*a peaks, at 5500......maybe the crankcase actual rpm of DR peak is higher.....?  and if so, it may tightrope between the two peaks?  or is t*a in control of DR as i was thinking previously?

what say ye?

so this is what i am looking at:

hiatus

 

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