HOIST-N-HAWGS Posted February 12, 2012 Posted February 12, 2012 This is directly from Shimano's website.... "In terms of the amount of line retrieved per crank, the Chronarch E7 reels pull in 30-inches, the E6 reels pull in 27-inches, while the E5 reels are capable of 23-inches. After running some tests you actually have to crank the handle over twice to reach these specs with every model. Are Asian inches larger than US inches! Quote
Al Wolbach Posted February 12, 2012 Posted February 12, 2012 Did you measure with the spool full of line or empty?.........................Al Quote
HOIST-N-HAWGS Posted February 12, 2012 Author Posted February 12, 2012 I was just re-spooling all my reels and it didn't seem like I was getting 30 inches on the E7. So, on the next E7 I measured out 30 inches of taut Dragon Call, one crank brought in about 15 inches, 2 cranks brought in the full 30. I repeated with filling bare spools with Super Slick 8 and got about the same results give or take a few inches with the E6's and E5, needing two revolutions of the reel handle to get the specs they claim. Quote
NCLifetimer Posted February 13, 2012 Posted February 13, 2012 IPT is simply circumference of line on spool(Pi*2*Radius or Diameter*3.14~) times gear ratio. so (gear ratio)X(Diameter)X(3.14~)= IPT. Most companies probably measure IPT when the line is inline with the top of the spool. IPT is different on each turn of the handle during the cast, as the spool diameter is smaller at the start of the cast and increases as line is taken in. I have also noticed that IPT actual is less then advertised, which is most likely because i don't quite fill the spool all the way up. 3 Quote
BradH Posted February 13, 2012 Posted February 13, 2012 Out of curiosity I just tried it on a Curado E7 and it came out to 30" on a full spool. Quote
Super User Hooligan Posted February 13, 2012 Super User Posted February 13, 2012 It's always done on full spool. IPT is worthless as a measurement on a low or empty spool, one of the primary reasons you should keep a spool as full as possible is that is when the reel is performing at its most efficient. 1 Quote
Jason Penn Posted February 13, 2012 Posted February 13, 2012 pretty much every reel i have ever checked was about an inch less than what the mfgs advertise. i couldn't tell you exactly how much less than full i keep my spools but i'm sure someone really good at math can! Quote
Delaware Valley Tackle Posted February 13, 2012 Posted February 13, 2012 A turn in IPT is 360* turn of the handle crank. Sounds like the OP is making 1/2 cranks resulting 1/2 IPT. 1 Quote
Super User J Francho Posted February 13, 2012 Super User Posted February 13, 2012 A turn in IPT is 360* turn of the handle crank. Sounds like the OP is making 1/2 cranks resulting 1/2 IPT. This. Quote
HOIST-N-HAWGS Posted February 14, 2012 Author Posted February 14, 2012 A turn in IPT is 360* turn of the handle crank. Sounds like the OP is making 1/2 cranks resulting 1/2 IPT. I'll video it if I have to. 95% full reel... two complete 360* turns of the handle. Quote
HOIST-N-HAWGS Posted February 14, 2012 Author Posted February 14, 2012 IPT is simply circumference of line on spool(Pi*2*Radius or Diameter*3.14~) times gear ratio. so (gear ratio)X(Diameter)X(3.14~)= IPT. Most companies probably measure IPT when the line is inline with the top of the spool. IPT is different on each turn of the handle during the cast, as the spool diameter is smaller at the start of the cast and increases as line is taken in. I have also noticed that IPT actual is less then advertised, which is most likely because i don't quite fill the spool all the way up. Thanks for the explanation NC! Quote
Super User islandbass Posted February 14, 2012 Super User Posted February 14, 2012 If your spools are filled to 95% capacity, you should not expect have attain manufacturer's specs. If the IPT is 30" at full spool, you ought to expect an IPT of about 28.5". Ha! just ribbin' you. But do make that video. I think it would be cool to see. On a side note, I tested this on my curado bsf, 101d and 201DHSV a while back and the IPTs for all were spot on. Quote
jmed999 Posted February 14, 2012 Posted February 14, 2012 Make the video...sounds like you have doubters! Put it on youtube and post the link Quote
Super User Team9nine Posted February 14, 2012 Super User Posted February 14, 2012 IPT is simply circumference of line on spool(Pi*2*Radius or Diameter*3.14~) times gear ratio. so (gear ratio)X(Diameter)X(3.14~)= IPT. Most companies probably measure IPT when the line is inline with the top of the spool. IPT is different on each turn of the handle during the cast, as the spool diameter is smaller at the start of the cast and increases as line is taken in. I have also noticed that IPT actual is less then advertised, which is most likely because i don't quite fill the spool all the way up. It's always done on full spool. IPT is worthless as a measurement on a low or empty spool, one of the primary reasons you should keep a spool as full as possible is that is when the reel is performing at its most efficient. x2 on the above - Just measured one of my reels a couple days ago for another reason and it was right on...but I'm a spool overfiller. Over or underfilling basically acts as a way to change relative gear ratio. -T9 Quote
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