BallReviews

Equipment Boards => Roto Grip => Topic started by: RyboFlavin on January 31, 2008, 04:13:14 AM

Title: Neptune - Mass Bias Positions
Post by: RyboFlavin on January 31, 2008, 04:13:14 AM

I am looking to get a Neptune for light oil conditions and I've been going over the drill sheet on RotoGrips website.  Say I decide on drilling pattern A...I would like to know how much of a difference I would expect to see between using the b) or c) mass bias positions.  I don't want too much of a squirty, angular backend, but then again I don't want it to go completely straight either.  So when they say that mass bias c) is a "controlled ball reaction"...what do they mean by controlled?  Do they mean it's going to go into a forward roll and flatten out?

I am looking to do either the A) or B) drill pattern.

If it helps, here are some of my specs depending on my hand and wrist position:

-16.3 mph according to the scoring machine.  Not sure of actual speed off of my hand.
-4 5/8 span to each finger
-higher revs
-20 to 40 degrees axis rotation
-0 to 10 degrees axis tilt
-PAP over 3.75" on the midline

I don't have any videos of myself, but I would say that my release is most similar to this video except with more revs and slightly less axis tilt  http://www.buildanarsenal.com/videodisplay.php?file=C-45hi




Edited on 1/31/2008 1:24 PM

Title: Re: Neptune - Mass Bias Positions
Post by: agroves on January 31, 2008, 02:16:56 PM

Uh, there is no mass bias...prior to drilling anyway.  You can pretty much dump that info for the purposes of drilling a neptune.

For light conditions, I'd go with a low flare pin position.  5-6" pin to pap, and reduce the side weight to help calm the backend down.

Andrew
--------------------
FUFU

Title: Re: Neptune - Mass Bias Positions
Post by: shelley on January 31, 2008, 05:38:55 PM

Andrew, Rotogrip's drill sheets for their symmetric balls balls have you mark the spot 6 3/4" from the pin through the CG and call it the MB, then lay the ball out using the pin and "MB".  It's equivalent to using the CG since all three are in line.

I think you're going to get a smooth reaction out of the Neptune almost regardless of how you drill it.  From most reports, it's a very smooth piece, even for a polished high-RG pearl.  Controlled reaction on light oil is what it was designed to do.

SH