Can anyone tell me if pop ups and wafters become more, or less buoyant the deeper you fish? On the lake I fish it has depths of up to 70ft, but mostly I fish depths from 3-35ft.
I have no idea how my baits are sitting. They could be like short zigs straight off the lead for all I know.
I have this theory in my head... if you're in a swimming pool with a football and you try to swim to the bottom while holding it, the deeper you go, the harder it fights to get up.
I have no idea how my baits are sitting. They could be like short zigs straight off the lead for all I know.
I have this theory in my head... if you're in a swimming pool with a football and you try to swim to the bottom while holding it, the deeper you go, the harder it fights to get up.
In reply to Post #1
The pressure is greater the deeper you go. So pop ups become less buoyant
The pressure is greater the deeper you go. So pop ups become less buoyant
In reply to Post #1
if you're in a swimming pool with a football and you try to swim to the bottom while holding it, the deeper you go, the harder it fights to get up.
A very good example, and an interesting question.
if you're in a swimming pool with a football and you try to swim to the bottom while holding it, the deeper you go, the harder it fights to get up.
A very good example, and an interesting question.
If you were to take a football for example to 70ft approx 21m that's equivalent to 3 bar of the football would be a little under 1/3 the size due to the gas compressing . Im sure I've seen a video of possibly Rob Hughes taking some pops to the bottom of the Vobster quarry in Somerset and videoing it . Will try and find it .
In reply to Post #1
https://www.properjobpopups.co.uk/water_pressure.php
https://www.properjobpopups.co.uk/water_pressure.php
it depends on what is being used to make the pop ups float.
air in a balloon or a ball will contract under pressure (become smaller) as the rubber can contract as well, however inside a solid object like a glass ball (often used in pop ups), the volume stays the same & it won't be affected (think about a submarine with a hard outside).
the amount of force that determines how much a bait pops up (upthrust) is the equivalent to the weight of the amount of water that it is displacing so as long as the volume doesn't change, it will be constant at any depth.
long & short - cork balls & foam will lose upthrust the deeper you go as the air in them contracts & volume becomes smaller but microspheres won't be effected unless you go REALLY deep when the glass balls collapse under the pressure
air in a balloon or a ball will contract under pressure (become smaller) as the rubber can contract as well, however inside a solid object like a glass ball (often used in pop ups), the volume stays the same & it won't be affected (think about a submarine with a hard outside).
the amount of force that determines how much a bait pops up (upthrust) is the equivalent to the weight of the amount of water that it is displacing so as long as the volume doesn't change, it will be constant at any depth.
long & short - cork balls & foam will lose upthrust the deeper you go as the air in them contracts & volume becomes smaller but microspheres won't be effected unless you go REALLY deep when the glass balls collapse under the pressure
In reply to Post #5
Cheers for that. So according to PJPU, the deeper you fish, the lower the pop up would sit and the quicker the buoyancy would reduce? That's what I took from that.
Cheers for that. So according to PJPU, the deeper you fish, the lower the pop up would sit and the quicker the buoyancy would reduce? That's what I took from that.
In reply to Post #1
https://www.wychwoodcarp.co.uk/news/post/everything-you-need-to-know-about-pop-ups-with-jon-mac
https://www.wychwoodcarp.co.uk/news/post/everything-you-need-to-know-about-pop-ups-with-jon-mac
In reply to Post #6
Taking a selection of cork and glasses balled pop ups down to depths decreasing to sub 100m and videoing the results would of been something I'd of happily done in the name of science if I hadn't given the hobby up a few years back 😆
Taking a selection of cork and glasses balled pop ups down to depths decreasing to sub 100m and videoing the results would of been something I'd of happily done in the name of science if I hadn't given the hobby up a few years back 😆