Morning matey. I'm just trying to work out what the effect of a restraining band half way down the balloon would be? I'm talking about a, say, two inch diameter band. I've had a play with the maths, cube of the radius etc, and I think that two smaller balloons taking the same volume of air may have a greater "contraction" of the muscle, especially when the gap made by the two spheres is taken into account. Just an idea!
Makes me think of atmospheric expansion ie: hot air expands, cold air contracts - ( hot) sunlight, (cool) sundown. If your experimental rig was set up to power a gravity dynamo and therefore a small l.e.d. light during the cool down phase.... keep it up!
Rob, attach four or more internal stiff levers with solid spheres on their opposite ends with the other end attached to the top side of the balloon or bag then they will extend down into the lower tendon area, so the outward expansion of the bag will be greater as the balloon increases the angle of incidence between the levers! I hope that description makes sense!
@@themeek351 would you be willing to draw out your idea? maybe you could make a youtube video on it or something would get some views and spark discussions?
@@skunknetwork No, I don't think that is necessary! It's really a simple device, so don't over think it! It's literally just two or three arms that can have smooth round balls at their far ends! You could even mount rollers on the ends for less friction against the inside of the net bag! Their other ends will join together in any fashion you like that allows the arms to hinge outwards! Then mount the balloon or expanding bag on the inside of their joined vertices! The expansion will force the arms apart. There might be a little loss of lifting power, but it should increase the length of the pull! This would depend on how flexible your balloon or expanding bag is! I hope this helps!
Interestingly the "sleeve" layer you mentioned occurs around natural muscles for precisely the same purpose. If that sleeve layer breaks down it can be extremely painful and cause damage to the muscle, just as you've described for the artificial one.
@@skunknetwork Had a friend, some years ago, that had the natural lubricant layer around her muscles breaking down due to an adverse reaction to a drug. (Premerin, I believe.) Due to the natural "slippery" layer breaking down and chafing against each other, she was constantly in pain when she moved. She described it most clearly, I think, as similar to the slippery layer that you can feel around raw chicken breast when your preparing them vs. the rougher texture of the muscle itself after you trim the slippery layer away. The difference in the two textures makes it easy to see how muscles w/o the protective layer world almost immediately become chaffed & painfully abraded. It only stands to reason that an artificial muscle, or set of muscles, would benefit from some form of "slip" layer to make actuation more efficient & protected from friction damage. Like lubricant in a machine, only more solid.
And again, another use for braided tube. It occurs to me to look for a mechanical advantage that produces linear contraction that is a multiple of volumetric change.
What if you used a bunch of coiled fillament muscle as the "tendon". Makes me think.. Get the best of both? 🤔 also would simulate the elasticity of tendons better.
you know, I've always wondered if the nylon fishing line muscles from your video years ago could be controlled electrically by coating them with your ink, and heating it by running electricity through said ink.
Would putting the ballon in the middle of the netting mean less chance of pinching? I imagine the tightest part of the net would not need to move very much.
Using a balloon that fills the whole net I'm guessing you would get less distance but more power for the same air pressure. In that case Isn't this like selecting different length levers?
Hi Rob. Seems to me that the satsuma net is too big; in that you need too much sideways expansion in order to get the required longitudenal contraction. Have you considered the more tubelike nets that hold 3 or 4 garlic bulbs?
the longer the contraction, the longer distance of the net sliding on the baloon, which means more wear on the baloon. with more contraction range, the baloon will wear faster. just a thing to consider in this topic
Looks like this is a great game for party's mate. An electric contracting one would be very interesting and could have ton's of uses. Maybe you can think up something ?
After thinking about this for a bit, you Might be able to use an inflatable kids ball. it would be bulkier when deflated, but Waay tougher, and should be substantial enough to put in a reasonable sized inlet/outlet on it for rapid inflation/deflation. just a thought.
Have been thinking about trying to build a artificial muscle using electro-conjugate fluid. Do you know what these fluids consist of and if it's possible to make these fluids?
Is there some reason why this isn't used widely? Is there a trade off of force for distance as you get with levers? In any case I find it weird that basic design of the McKibben muscles doesn't seem to vary much having looked at lots of versions of it. It would be cool if someone created an evolutionary algorithm that tested out a bunch of different combinations of size and shape of balloon versus sleeve size to determine the best combination of force and distance (or perhaps there might be a direct mathematic way of proving what the optimum design might be). I also wonder whether the weave pattern of the sleeve could somehow be optimised.
Appears to be a great respiratory therapy device! Most of your input seems expended in linear expansion. Might not two or more, shorter balloons (or bellows), arranged around a fill tube to expand outward, be more effective at moving the "tendon"?
Joseph Laws McKibben. Famous or should be for something else in science too. His work on this was a “homer” to help his daughter paralysed with polio. Check out his day job .
Really nice, I would suggest, smear a few drops of oil on the balloon to reduce friction. Also... I think you can connect a couple of surgical syringes with tubes to the balloon to make "hydraulic pump"...😁..👍 Really like your videos.. Thank you 🙏
I suppose theoretically you could turn that idea into a run on 'tendon'? like a sausage link, the casing being the tendon, the meat the contracted muscle, with the link working kinda like a pivot/elbow? i unno.... makes sense in my mind, but ill be damned if I can put it into logical words lol
![Felix "Unfair" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/Oswujxm2Ag0/mqdefault.jpg)
You could add a non-expand tube or sleeve tot the bottom half or one-third to prevent that portion from expanding.
Morning matey. I'm just trying to work out what the effect of a restraining band half way down the balloon would be? I'm talking about a, say, two inch diameter band. I've had a play with the maths, cube of the radius etc, and I think that two smaller balloons taking the same volume of air may have a greater "contraction" of the muscle, especially when the gap made by the two spheres is taken into account. Just an idea!
Makes me think of atmospheric expansion ie: hot air expands, cold air contracts - ( hot) sunlight, (cool) sundown. If your experimental rig was set up to power a gravity dynamo and therefore a small l.e.d. light during the cool down phase.... keep it up!
Rob, attach four or more internal stiff levers with solid spheres on their opposite ends with the other end attached to the top side of the balloon or bag then they will extend down into the lower tendon area, so the outward expansion of the bag will be greater as the balloon increases the angle of incidence between the levers! I hope that description makes sense!
hey, i'm doing a bionics project at uni, would you mind if i asked you some more questions on your idea please?
@@skunknetwork Sure! What do you want to know!
@@themeek351 would you be willing to draw out your idea? maybe you could make a youtube video on it or something
would get some views and spark discussions?
@@skunknetwork No, I don't think that is necessary! It's really a simple device, so don't over think it! It's literally just two or three arms that can have smooth round balls at their far ends! You could even mount rollers on the ends for less friction against the inside of the net bag! Their other ends will join together in any fashion you like that allows the arms to hinge outwards! Then mount the balloon or expanding bag on the inside of their joined vertices! The expansion will force the arms apart. There might be a little loss of lifting power, but it should increase the length of the pull! This would depend on how flexible your balloon or expanding bag is! I hope this helps!
Interestingly the "sleeve" layer you mentioned occurs around natural muscles for precisely the same purpose. If that sleeve layer breaks down it can be extremely painful and cause damage to the muscle, just as you've described for the artificial one.
really? can you expand a bit on this please? doing a bionics project at uni
@@skunknetwork Had a friend, some years ago, that had the natural lubricant layer around her muscles breaking down due to an adverse reaction to a drug. (Premerin, I believe.) Due to the natural "slippery" layer breaking down and chafing against each other, she was constantly in pain when she moved. She described it most clearly, I think, as similar to the slippery layer that you can feel around raw chicken breast when your preparing them vs. the rougher texture of the muscle itself after you trim the slippery layer away. The difference in the two textures makes it easy to see how muscles w/o the protective layer world almost immediately become chaffed & painfully abraded. It only stands to reason that an artificial muscle, or set of muscles, would benefit from some form of "slip" layer to make actuation more efficient & protected from friction damage. Like lubricant in a machine, only more solid.
@@Killianwsh interesting, thank you!
And again, another use for braided tube. It occurs to me to look for a mechanical advantage that produces linear contraction that is a multiple of volumetric change.
9 seconds
@@karlmyers6518 nice
What if you used a bunch of coiled fillament muscle as the "tendon". Makes me think.. Get the best of both? 🤔 also would simulate the elasticity of tendons better.
You can't put to match weight on those elastic tendens. You can increase the contraction by set then in series
Surgical tubing.
Robert, I was wondering if you could do a video on how to make a generator that produced enough power to power a laptop
Now you can make a whole arm
Nice, was funny watching you reach for the ruler while maintaining the balloon pressure
you know, I've always wondered if the nylon fishing line muscles from your video years ago could be controlled electrically by coating them with your ink, and heating it by running electricity through said ink.
Very interesting on your experimentation on this. best DVD:)
I know this is from 2 years ago, but what happened to video 1007 which was referenced in this video?
Would putting the ballon in the middle of the netting mean less chance of pinching? I imagine the tightest part of the net would not need to move very much.
Using a balloon that fills the whole net I'm guessing you would get less distance but more power for the same air pressure. In that case Isn't this like selecting different length levers?
Hi Rob. Seems to me that the satsuma net is too big; in that you need too much sideways expansion in order to get the required longitudenal contraction. Have you considered the more tubelike nets that hold 3 or 4 garlic bulbs?
the longer the contraction, the longer distance of the net sliding on the baloon, which means more wear on the baloon.
with more contraction range, the baloon will wear faster.
just a thing to consider in this topic
Looks like this is a great game for party's mate. An electric contracting one would be very interesting and could have ton's of uses. Maybe you can think up something ?
Try putting a cable tie at the bottom of the balloon so it can only expand outwards but not down.🤔
After thinking about this for a bit, you Might be able to use an inflatable kids ball. it would be bulkier when deflated, but Waay tougher, and should be substantial enough to put in a reasonable sized inlet/outlet on it for rapid inflation/deflation. just a thought.
Have been thinking about trying to build a artificial muscle using electro-conjugate fluid.
Do you know what these fluids consist of and if it's possible to make these fluids?
Interesting. With pneumatic muscles is there a mechanical advantage?
Is there some reason why this isn't used widely? Is there a trade off of force for distance as you get with levers? In any case I find it weird that basic design of the McKibben muscles doesn't seem to vary much having looked at lots of versions of it. It would be cool if someone created an evolutionary algorithm that tested out a bunch of different combinations of size and shape of balloon versus sleeve size to determine the best combination of force and distance (or perhaps there might be a direct mathematic way of proving what the optimum design might be). I also wonder whether the weave pattern of the sleeve could somehow be optimised.
Appears to be a great respiratory therapy device! Most of your input seems expended in linear expansion. Might not two or more, shorter balloons (or bellows), arranged around a fill tube to expand outward, be more effective at moving the "tendon"?
Joseph Laws McKibben. Famous or should be for something else in science too. His work on this was a “homer” to help his daughter paralysed with polio. Check out his day job .
Really nice, I would suggest, smear a few drops of oil on the balloon to reduce friction.
Also... I think you can connect a couple of surgical syringes with tubes to the balloon to make "hydraulic pump"...😁..👍
Really like your videos.. Thank you 🙏
I suppose theoretically you could turn that idea into a run on 'tendon'? like a sausage link, the casing being the tendon, the meat the contracted muscle, with the link working kinda like a pivot/elbow? i unno.... makes sense in my mind, but ill be damned if I can put it into logical words lol
Using this, hydro-pneumatic muscles seem possible.
Awesome!
you're great :)
So cool
Who else was holding their breath?
silk
Not onlusten verry cool, also verry funny :)
Onlusten :/ only That is
Condom?
SL_ST AIR MUSCULE GrabCAD.
Try my artificial muscle construction. I think it has a number of advantages. A large working stroke is one of them.