Anyone tried DIY spools? $29-$40 BFS spools!
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- TT Pro Angler
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Re: Anyone tried DIY spools? $29-$40 BFS spools!
Thanks guys.
Re: Anyone tried DIY spools? $29-$40 BFS spools!
I bought these for my pixy. The quality is on par with what Hedgehog makes. Really impressed.
https://www.aliexpress.com/item/4001287 ... 2e038g0ZmK
https://www.aliexpress.com/item/4001287 ... 2e038g0ZmK
- Carlos Carrapiço
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Re: Anyone tried DIY spools? $29-$40 BFS spools!
I think your results might be wrong by a Pi factor:
Perimeter = Pi * Diameter
The average spool speed during the casting if I remember correctly is around 10k rpm and peaking at 30k rpm.
Re: Anyone tried DIY spools? $29-$40 BFS spools!
Thanks Carlos Carrapiço,
I fat fingered a 13 instead of a 3 converting ft to yds. I fixed the original post. Now it shows 9800 rpm for the example.
I fat fingered a 13 instead of a 3 converting ft to yds. I fixed the original post. Now it shows 9800 rpm for the example.
Re: Anyone tried DIY spools? $29-$40 BFS spools!
This is absolutely not accurate, I’m just doing brain exercise.
In here I’m casting ~23 m.
https://www.youtube.com/watch?v=ZHVpq00gu8U&t=46s
Cast time ~2,5 s.
That’s 9,2 m/s.
30 mm spool perimeter is 0,09428 m.
That makes 97,6 rps, which is 5857 rpm.
But actually cast starts from ~4,2 m higher than it lands. And arc length of 23 m cast is something 31 m.
So line length is 1,35 x more. => Spool rpm is something 7894 rpm.
But rpm in the end is near to 0. => So rpm in the begin is much higher, something 10’000 – 13’000 rpm.
In here I’m casting ~23 m.
https://www.youtube.com/watch?v=ZHVpq00gu8U&t=46s
Cast time ~2,5 s.
That’s 9,2 m/s.
30 mm spool perimeter is 0,09428 m.
That makes 97,6 rps, which is 5857 rpm.
But actually cast starts from ~4,2 m higher than it lands. And arc length of 23 m cast is something 31 m.
So line length is 1,35 x more. => Spool rpm is something 7894 rpm.
But rpm in the end is near to 0. => So rpm in the begin is much higher, something 10’000 – 13’000 rpm.
- Loafer
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Re: Anyone tried DIY spools? $29-$40 BFS spools!
Hello, Friends!
Is it new for 2021 Rays Studio spool for Steez: http://alii.pub/5lwknj ?
34 mm BFS spool with 4 position FIXED inductor .
Is it new for 2021 Rays Studio spool for Steez: http://alii.pub/5lwknj ?
34 mm BFS spool with 4 position FIXED inductor .
Re: Anyone tried DIY spools? $29-$40 BFS spools!
It is new to me. Just 1 thing to do...Loafer wrote: ↑Sat Mar 06, 2021 11:51 amHello, Friends!
Is it new for 2021 Rays Studio spool for Steez: http://alii.pub/5lwknj ?
34 mm BFS spool with 4 position FIXED inductor .
- Carlos Carrapiço
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Re: Anyone tried DIY spools? $29-$40 BFS spools!
The RPM will be max in the beginning of the cast and then it will always diminish.jvelth74 wrote: ↑Thu Mar 04, 2021 8:23 amThis is absolutely not accurate, I’m just doing brain exercise.
In here I’m casting ~23 m.
https://www.youtube.com/watch?v=ZHVpq00gu8U&t=46s
Cast time ~2,5 s.
That’s 9,2 m/s.
30 mm spool perimeter is 0,09428 m.
That makes 97,6 rps, which is 5857 rpm.
But actually cast starts from ~4,2 m higher than it lands. And arc length of 23 m cast is something 31 m.
So line length is 1,35 x more. => Spool rpm is something 7894 rpm.
But rpm in the end is near to 0. => So rpm in the begin is much higher, something 10’000 – 13’000 rpm.
line length.JPG
You assume a linear loss of speed but in reality and considering aerodynamic drag, the dependence is quadratic and therefore the spool speed drops very steeply until it gets to a slower speed.
What I’m saying is that you are underestimating the max rpm.
In a normal cast one might reach easily >20k rpm.
When casting for distance with a good reel, you’ll get up to 30k rpm.
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- TT Pro Angler
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Re: Anyone tried DIY spools? $29-$40 BFS spools!
Wow!Carlos Carrapiço wrote: ↑Sat Mar 06, 2021 2:05 pmThe RPM will be max in the beginning of the cast and then it will always diminish.jvelth74 wrote: ↑Thu Mar 04, 2021 8:23 amThis is absolutely not accurate, I’m just doing brain exercise.
In here I’m casting ~23 m.
https://www.youtube.com/watch?v=ZHVpq00gu8U&t=46s
Cast time ~2,5 s.
That’s 9,2 m/s.
30 mm spool perimeter is 0,09428 m.
That makes 97,6 rps, which is 5857 rpm.
But actually cast starts from ~4,2 m higher than it lands. And arc length of 23 m cast is something 31 m.
So line length is 1,35 x more. => Spool rpm is something 7894 rpm.
But rpm in the end is near to 0. => So rpm in the begin is much higher, something 10’000 – 13’000 rpm.
line length.JPG
You assume a linear loss of speed but in reality and considering aerodynamic drag, the dependence is quadratic and therefore the spool speed drops very steeply until it gets to a slower speed.
What I’m saying is that you are underestimating the max rpm.
In a normal cast one might reach easily >20k rpm.
When casting for distance with a good reel, you’ll get up to 30k rpm.
Re: Anyone tried DIY spools? $29-$40 BFS spools!
Another one estimation. Here I'm casting:
https://www.youtube.com/watch?v=OA5bRF_K0Oo&t=30s
I think it's 100 m or more. Air time is 5,2 seconds.
I Imaginated arc as following. Arc length is 122 m: Casting weight velocity / spool revolutions profile (during cast) I assumed something following: End velocity I assumed as 41% of starting velocity. To the end spool accelerates slightly because weight is descending. It can be heard by spool noise.
Making some area calculation / approximation: starting velocity is something around 46 m/s.
36 mm spool perimeter is 0,0113 m.
This makes starting RPM 24'300.
But, there is much assumed. So I'm not saying this it actually is. It's just one approximation. (30 k RPM is possible.)
https://www.youtube.com/watch?v=OA5bRF_K0Oo&t=30s
I think it's 100 m or more. Air time is 5,2 seconds.
I Imaginated arc as following. Arc length is 122 m: Casting weight velocity / spool revolutions profile (during cast) I assumed something following: End velocity I assumed as 41% of starting velocity. To the end spool accelerates slightly because weight is descending. It can be heard by spool noise.
Making some area calculation / approximation: starting velocity is something around 46 m/s.
36 mm spool perimeter is 0,0113 m.
This makes starting RPM 24'300.
But, there is much assumed. So I'm not saying this it actually is. It's just one approximation. (30 k RPM is possible.)
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Re: Anyone tried DIY spools? $29-$40 BFS spools!
For what duration. 1/4 sec 1/2 sec???Carlos Carrapiço wrote: ↑Sat Mar 06, 2021 2:05 pmThe RPM will be max in the beginning of the cast and then it will always diminish.jvelth74 wrote: ↑Thu Mar 04, 2021 8:23 amThis is absolutely not accurate, I’m just doing brain exercise.
In here I’m casting ~23 m.
https://www.youtube.com/watch?v=ZHVpq00gu8U&t=46s
Cast time ~2,5 s.
That’s 9,2 m/s.
30 mm spool perimeter is 0,09428 m.
That makes 97,6 rps, which is 5857 rpm.
But actually cast starts from ~4,2 m higher than it lands. And arc length of 23 m cast is something 31 m.
So line length is 1,35 x more. => Spool rpm is something 7894 rpm.
But rpm in the end is near to 0. => So rpm in the begin is much higher, something 10’000 – 13’000 rpm.
line length.JPG
You assume a linear loss of speed but in reality and considering aerodynamic drag, the dependence is quadratic and therefore the spool speed drops very steeply until it gets to a slower speed.
What I’m saying is that you are underestimating the max rpm.
In a normal cast one might reach easily >20k rpm.
When casting for distance with a good reel, you’ll get up to 30k rpm.
Re: Anyone tried DIY spools? $29-$40 BFS spools!
30000 rpm, so 500 revs per second.
Who's got a high end slow mo camera?
Think Samsung S20 in super slow mo can do 960 fps.
Who's got a high end slow mo camera?
Think Samsung S20 in super slow mo can do 960 fps.
Re: Anyone tried DIY spools? $29-$40 BFS spools!
Guys, the RPM discussion is very interesting. Perhaps it deserves a Topic of its own as the DIY Spool thread is difficult enough to navigate as it is.
Re: Anyone tried DIY spools? $29-$40 BFS spools!
I tried acoustic tachometer in smartphone Didn't success
I was looking that GoPro 5 Black can take 240 fps @ 1280x720. That doesn't help either I think.
Sad but Daiwa don't make videocameras. Their Hyper Digi camera would suit perfectly for this need.
I was looking that GoPro 5 Black can take 240 fps @ 1280x720. That doesn't help either I think.
Sad but Daiwa don't make videocameras. Their Hyper Digi camera would suit perfectly for this need.
- Gone Phishin
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