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Author Topic: Dual Angle...?  (Read 4011 times)

bigearv14

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Dual Angle...?
« on: January 01, 2011, 07:52:44 AM »
OK, after a few years, I just read up on the dual angle layouts and I learned a lot. I am getting 2 new balls (920A & 920T), one I want to be a max-hook skid/flip ball, and the other I want a strong arcing backend.
 
So on the 920A, my new skid/flip...I saw that a 90° drilling angle will roll the latest and a 20° VAL angle will transition the fastest at the breakpoint. I throw the ball about 19mph with very high revs. Is there any chance that 90° will push the ball through the breakpoint?
 
OK...and just for a rule of thumb reference...is this correct?
 
The higher the drilling angle, the more the length...and the higher the VAL angle, the sharper the break...
 
...or did I miss the whole point?
 
Thank you for your help!
 
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charlest

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Re: Dual Angle...?
« Reply #1 on: January 01, 2011, 05:08:27 PM »
"So on the 920A, my new skid/flip...I saw that a 90° drilling angle will roll the latest and a 20° VAL angle will transition the fastest at the breakpoint. I throw the ball about 19mph with very high revs. Is there any chance that 90° will push the ball through the breakpoint?"
 
There always is that danger, no matter what angles you use. The surface will be more responsible for where the breakpoint is. Once the surface is set for your ball speed and the friction coordination of ball surface and lane surface+oil amount, the proper dual angles will provide the optimum breakpoint shape.
FYI, AFAIK, 10 degrees is the shortest, most abrupt VAL angle.
 
"The higher the drilling angle, the more the length...and the higher the VAL angle, the sharper the break..."
 
AFAIK, the smaller the VAL angle, the sharper the breakpoint. 
 
You should go over to  BowlingChat.net's forum and get the vital information from the horse's mouth. Read the WIKI documentation and give Mo and his crew your release/delivery specifications and they will point youin the right direction.


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bigearv14

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Re: Dual Angle...?
« Reply #2 on: January 01, 2011, 10:48:46 PM »
Thank you sir...very useful information...I think I may go 70° x 4.5" x 20° on my 920A...something closer to 50° x 4" x 30° on the 920T...sound good to anyone?
 
 
 


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completebowler

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Re: Dual Angle...?
« Reply #3 on: January 02, 2011, 06:46:00 AM »

 
bigearv14 wrote on 1/1/2011 11:48 PM:
Thank you sir...very useful information...I think I may go 70° x 4.5" x 20° on my 920A...something closer to 50° x 4" x 30° on the 920T...sound good to anyone?
 
 
 





Those layouts sound pretty strong if that is what you are looking for then you are on the right track. Take up charlest on his advice about reading some of the technical posts on bowlingchat.....while there find out about the double thumb balance hole and where to place it along the gradient line.

Good luck.

ALL STAR BOWLING & TROPHY
LANGAN'S ALL STAR LANES
WALLED LAKE MI
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charlest

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Re: Dual Angle...?
« Reply #4 on: January 02, 2011, 11:02:32 AM »
You really need to check out the Dual Angle drilling basics and concepts. 
The Drill and VAL angles, their sum and their proportions are very specific to your rev rate, ball speed, tilt and rotation. You need to know the subject or go over to BowlingChat and ask MO with all those specifications at hand!! This is especially true for stronger PSA ball like the 920 series. You can't just use what everyone else uses.
bigearv14 wrote on 1/1/2011 11:48 PM:
Thank you sir...very useful information...I think I may go 70° x 4.5" x 20° on my 920A...something closer to 50° x 4" x 30° on the 920T...sound good to anyone?
 
 
 




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