Let's place all the Bass shelter OT stuff here. Cabinet/structure tech is applicable to more than subs and cover multiway and full range too. And we have all the dev work with CAD, electronics, mechanical and much of the cross category stuff
Active projects
Phoenix
Racer 8
Heaving Bed
Active projects
Phoenix
Racer 8
Heaving Bed
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There was a recent thread exploring CLD where I pointed out the reciprocating action of a driver activating the mass of the cab, and this was discounted as not being a significant factor. The new stand in the linked Racer 8 thread is a big, heavy and stiff steel structure that is well braced. I described that a heavy, stiff structure will transfer this energy like the tip of a pool cue through the walls and braces and here is a demo of this
Each leg ends in a bolt plate, and with just one of these plate ends pushed up slightly against a leg of the Heaving Bed activates the bed's jiggle system nicely. This is just the moving mass of this lil sub activating the PU rubber railed slats by transmitting through one stand leg into one bed leg. Both legs are seriously braced to the rest of the structures and to the floor with their heft
I also tried to explain my observations made while developing composites in another industry. That this energy is a waste and a net loss for the driver. Damping it means diluting it through other things. My view is to harness it instead by using resonant systems like PR or ports plus loadlines with the argument that instead of wasting it into vibrating structures, direct it into vibrations that produce a net benefit. So a rigid and thick walled but lightweight cab to first lower the cone energy getting transferred into the cabs structure
Let's open the floor here again to explore this effect. I will be the proponent for FRP Sandwich tech using thick structural foam walls with structural skins and demo the how's in the various cabs and vehicle structures to be built for the Bass Shelter projects
Each leg ends in a bolt plate, and with just one of these plate ends pushed up slightly against a leg of the Heaving Bed activates the bed's jiggle system nicely. This is just the moving mass of this lil sub activating the PU rubber railed slats by transmitting through one stand leg into one bed leg. Both legs are seriously braced to the rest of the structures and to the floor with their heft
I also tried to explain my observations made while developing composites in another industry. That this energy is a waste and a net loss for the driver. Damping it means diluting it through other things. My view is to harness it instead by using resonant systems like PR or ports plus loadlines with the argument that instead of wasting it into vibrating structures, direct it into vibrations that produce a net benefit. So a rigid and thick walled but lightweight cab to first lower the cone energy getting transferred into the cabs structure
Let's open the floor here again to explore this effect. I will be the proponent for FRP Sandwich tech using thick structural foam walls with structural skins and demo the how's in the various cabs and vehicle structures to be built for the Bass Shelter projects
Today I picked up a 55" Toshiba 4k screen taking advantage of $228 discount during Boxing Day sale. I have been eyeing this one since picking up the Dynabook Protégé. This completes the BOM for my new audio/video/3D studio/electronics/work bench in my chill area
Not too long ago, I built a complete studio area and work bench area in another area, but had to move all the gear out to make it infant friendly. Now will have to build another desk/bench setup with a lot less room and have to contain it all to one piece of furniture as a corner unit. The challenge of accommodating it all is doing my head in
Leaning towards making a computer desk type front with a triangular top and base. A slide out for the synth/Windows keyboard and mouse and the digital mixer pair on the top. Speakers to each side on the top and the screen behind the mixers. If I place the unit on wheels, I can then build child safe storage in the back of it for all the electronics stock and fishing tackle. This storage would be inaccessible when the unit is parked into position in the corner
Been planning this for a while and feels good that it's all coming together. Really looking forward to having a decent tinkering area. Sometimes it gets impossible to work on fun stuff with high demand for space in a 'tiny home'
My fav desktop system, the Logitech z623 is going to look so plain next to the new screen and all the Roland Aira gear. Love the sound of those FR drivers too much to give them up, so some new pretty cabs coming up for them
Not too long ago, I built a complete studio area and work bench area in another area, but had to move all the gear out to make it infant friendly. Now will have to build another desk/bench setup with a lot less room and have to contain it all to one piece of furniture as a corner unit. The challenge of accommodating it all is doing my head in
Leaning towards making a computer desk type front with a triangular top and base. A slide out for the synth/Windows keyboard and mouse and the digital mixer pair on the top. Speakers to each side on the top and the screen behind the mixers. If I place the unit on wheels, I can then build child safe storage in the back of it for all the electronics stock and fishing tackle. This storage would be inaccessible when the unit is parked into position in the corner
Been planning this for a while and feels good that it's all coming together. Really looking forward to having a decent tinkering area. Sometimes it gets impossible to work on fun stuff with high demand for space in a 'tiny home'
My fav desktop system, the Logitech z623 is going to look so plain next to the new screen and all the Roland Aira gear. Love the sound of those FR drivers too much to give them up, so some new pretty cabs coming up for them
Picked up 3 flatpak modular cube storage units with the thick oak slab look from Bunnings. Some modular parts from that range too. Assembled and looks fairly smart. Will configure them into a corner unit that can hold all the gear similar to what I wanted to make. Decided to take this route to save some time and effort
https://www.bunnings.com.au/search/products?page=1&q=clever+cube&rest=products&pageSize=36
E-trike kids
My kid is more keen on four wheels, so we also finally decided on the exact format and picked up a pair of BLDC hub motors to turn it into RWD. The battery and controller too for rear electric diff drive. I did the frame originally in a manner that can support a legal electric 3 or 4 wheeled build. The tricky part will be to find a way to marry the dual throttle units to the steering wheel in a manner that unloads one rear wheel while turning. So this means that when the foot throttle pedal is depressed, it should rev up both motors, but if the steering wheel is also turned, then the drive to one wheel should be reduced. Would welcome some ideas on how to pull this off
https://www.bunnings.com.au/search/products?page=1&q=clever+cube&rest=products&pageSize=36
E-trike kids
My kid is more keen on four wheels, so we also finally decided on the exact format and picked up a pair of BLDC hub motors to turn it into RWD. The battery and controller too for rear electric diff drive. I did the frame originally in a manner that can support a legal electric 3 or 4 wheeled build. The tricky part will be to find a way to marry the dual throttle units to the steering wheel in a manner that unloads one rear wheel while turning. So this means that when the foot throttle pedal is depressed, it should rev up both motors, but if the steering wheel is also turned, then the drive to one wheel should be reduced. Would welcome some ideas on how to pull this off
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Phoenix marine gokart
It has been challenging to come up with a marine duty AWD drivetrain, with the largest difficulty being the front CVT/steering knuckle. Rear would also be good as would allow change of camber. Happy to say that may have found a solution that doesn't require too much fabricating
Losi 5IVE-T
This is a 1/5 scale RC toy. I have found a supply of tough alloy suspension parts and stainless CVTs on Ali. There is quite an aftermarket for this model. This should run a set of water wheels well. The CVTs connect to the 5IVE-T diffs, but I can cut the ends off and use a coupler to fit them on the ends of the axle shafts. I think I can safely upgrade to a 5kw motor later on this drivetrain
It has been challenging to come up with a marine duty AWD drivetrain, with the largest difficulty being the front CVT/steering knuckle. Rear would also be good as would allow change of camber. Happy to say that may have found a solution that doesn't require too much fabricating
Losi 5IVE-T
This is a 1/5 scale RC toy. I have found a supply of tough alloy suspension parts and stainless CVTs on Ali. There is quite an aftermarket for this model. This should run a set of water wheels well. The CVTs connect to the 5IVE-T diffs, but I can cut the ends off and use a coupler to fit them on the ends of the axle shafts. I think I can safely upgrade to a 5kw motor later on this drivetrain
Phoenix marine gokart
I tried the appropriate industry forums for these types of things, but it's a crowd with many different priorities to our mindset. Finding and creating solutions is a challenge, but I am enjoying the process of learning it from the outside. So far I think I have learnt the following as it applies to my project
This pic below illustrates a front setup from the 5IVE-T 1/5 scale AWD that I will be borrowing parts from. Working from outside in, there are the hub and carrier parts that attach to the suspension arms
These are the parts from Ali in tough plastic and all the parts are also available in alloy
The 5-T has enough following and there are plenty of custom struts/shocks/tie rod options. I will be using 10mm shaft systems and have found that front knuckle can fit a stainless uni joint in the housing instead of the stock CVD. This will allow me to fit an all 10mm stainless axles front and rear. The bearings are also on Ali and the sealed types. They cost around $10 for 4 units, so can be classed as consumables
So this is the drive through the hubs sorted. The 5-T systems has disc brakes and alloy rims and such, so all good there. I am sure I can marry my inflatable bladed tyres to these rims with printed adaptors
This brings to an area that I am not very sure about, differentials. I do know that differential drives also help with steering on water. The inner prop or wheel needs to turn slower than the outer through a turn. Since I will be on water, I think a regular diff type over an LSD will be appropriate as either side whels will always face the same surface. My motor is an ehub so a transverse mount and I don't need to turn the power 90 degrees
Thinking about using this diff in the pic below. My idea is to use this as a transmission for belt drive. The input shaft can accept power via belt from either an ehub or petrol motor. The output shafts are independent, as in a proper diff. I want to try to use the left output shaft to send power via belt to the left front and rear and right to the right front and rear. The pulleys on these output shafts can set final ratio and this can be a cheap DIY job
The wheels and things were sorted some time ago so I think this works out the detail for bringing it together, so will set the build in motion alongside the kids E-kart. We are set to learn a lot about designing the beach cat and the larger boat with this pair of beach toys. I willl present a 3D general arrangement pic soon so folks can get some idea of what we are making and will also post details of the FreeCAD process
I tried the appropriate industry forums for these types of things, but it's a crowd with many different priorities to our mindset. Finding and creating solutions is a challenge, but I am enjoying the process of learning it from the outside. So far I think I have learnt the following as it applies to my project
This pic below illustrates a front setup from the 5IVE-T 1/5 scale AWD that I will be borrowing parts from. Working from outside in, there are the hub and carrier parts that attach to the suspension arms
These are the parts from Ali in tough plastic and all the parts are also available in alloy
The 5-T has enough following and there are plenty of custom struts/shocks/tie rod options. I will be using 10mm shaft systems and have found that front knuckle can fit a stainless uni joint in the housing instead of the stock CVD. This will allow me to fit an all 10mm stainless axles front and rear. The bearings are also on Ali and the sealed types. They cost around $10 for 4 units, so can be classed as consumables
So this is the drive through the hubs sorted. The 5-T systems has disc brakes and alloy rims and such, so all good there. I am sure I can marry my inflatable bladed tyres to these rims with printed adaptors
This brings to an area that I am not very sure about, differentials. I do know that differential drives also help with steering on water. The inner prop or wheel needs to turn slower than the outer through a turn. Since I will be on water, I think a regular diff type over an LSD will be appropriate as either side whels will always face the same surface. My motor is an ehub so a transverse mount and I don't need to turn the power 90 degrees
Thinking about using this diff in the pic below. My idea is to use this as a transmission for belt drive. The input shaft can accept power via belt from either an ehub or petrol motor. The output shafts are independent, as in a proper diff. I want to try to use the left output shaft to send power via belt to the left front and rear and right to the right front and rear. The pulleys on these output shafts can set final ratio and this can be a cheap DIY job
The wheels and things were sorted some time ago so I think this works out the detail for bringing it together, so will set the build in motion alongside the kids E-kart. We are set to learn a lot about designing the beach cat and the larger boat with this pair of beach toys. I willl present a 3D general arrangement pic soon so folks can get some idea of what we are making and will also post details of the FreeCAD process
Attachments
I have designed a marine grade, 15mm toothed belt based, symmetrical AWD rear transaxle with limited slip diff and half axle shafts front and rear
Using very simple 10mm stainless rods for all shafts and alloy timing pulleys from Ali. Here is where my previous experience as a fishing tackle developer comes into play, as I will be making a custom carbon fibre clutch for the drive pulley for each side that will make the LSD possible. The clutches will be actuated by the steering action and similar to a lever drag reel. I also have an idea to use a tensioner wheel instead of the clutch to get the same effect
The pulleys also make it cheap and easy to mess with ratios. This can be a marine grade wet system without a worry too. Not counting the hub end, this would use 4x belts, 6x pulleys, 2x carbon fibre HT100 washers, 2x stainless clutch washers, 2x cams, 2x levers, 2x wave springs, 4x blue seal bearings and a pair of tie rods for the entire AWD transaxle with LSD. Most parts are off the shelf from either Ali or Penn Service and Parts
Using very simple 10mm stainless rods for all shafts and alloy timing pulleys from Ali. Here is where my previous experience as a fishing tackle developer comes into play, as I will be making a custom carbon fibre clutch for the drive pulley for each side that will make the LSD possible. The clutches will be actuated by the steering action and similar to a lever drag reel. I also have an idea to use a tensioner wheel instead of the clutch to get the same effect
The pulleys also make it cheap and easy to mess with ratios. This can be a marine grade wet system without a worry too. Not counting the hub end, this would use 4x belts, 6x pulleys, 2x carbon fibre HT100 washers, 2x stainless clutch washers, 2x cams, 2x levers, 2x wave springs, 4x blue seal bearings and a pair of tie rods for the entire AWD transaxle with LSD. Most parts are off the shelf from either Ali or Penn Service and Parts
A lil update for my project. I had expected to be able to devote a few hours a day by the end of Feb. My wife has been committed to a 3yr professional development thing, she is in medicine. The last three months of it was all assessment tasks, workshops, exams and such with each one needing a 600km return drive to Brisbane. It has been difficult to find some time for anything else and not being exhausted with full-time care of the kids
Happy to say that the exams are all passed, but due to bureaucratic nonsense the assignments tasks took much longer. In that time, I prepared and registered the trailer for the Smartwave 3500 and registered that boat too. Had to spend significant funds to also replace the front shocks, steering rods, CVDs and all four wheel hubs on the Subaru XV. This is not a car for driving enthusiasts, and it is built very lightly. Definitely not the car for this former taxi driver! Keeping an eye out for a reasonable shape used example for a return to a Holden Adventura LX8
The expenses on the car has ruled out hired help for the larger vessel for now, so I have been focussing on the smaller two. Added another vessel to the project list when a bargain for a pair of new HDPE hulls came up at a local shop. Could not ignore at $129 each and down from $349. This one will proof test all the concepts to be carried over the beachcat. It is shaping up to be an Eco-electric catamaran personal watercraft, and I have some commercial aspirations for this one. It is a strong contender to replicate and add to my rental fleet if the prototype works out well. Already generating a lot of interest, being carried around on the roof racks. Will be a solid daily launcher
The racer 8 sub will fit to this one too, but I haven't been able to carry forward anymore work on that. Too much other stuff going on and pointless to engage in further design until I can make a new station for the CNC. On the urgent to-do list as my mini disco sound system also cannot start without that machine too
Spent the new-found time yesterday getting back to some fishing. Caught a nice Spanish Mackerel (AU variety). Some pics soon of the new baby of the fleet getting put together
Happy to say that the exams are all passed, but due to bureaucratic nonsense the assignments tasks took much longer. In that time, I prepared and registered the trailer for the Smartwave 3500 and registered that boat too. Had to spend significant funds to also replace the front shocks, steering rods, CVDs and all four wheel hubs on the Subaru XV. This is not a car for driving enthusiasts, and it is built very lightly. Definitely not the car for this former taxi driver! Keeping an eye out for a reasonable shape used example for a return to a Holden Adventura LX8
The expenses on the car has ruled out hired help for the larger vessel for now, so I have been focussing on the smaller two. Added another vessel to the project list when a bargain for a pair of new HDPE hulls came up at a local shop. Could not ignore at $129 each and down from $349. This one will proof test all the concepts to be carried over the beachcat. It is shaping up to be an Eco-electric catamaran personal watercraft, and I have some commercial aspirations for this one. It is a strong contender to replicate and add to my rental fleet if the prototype works out well. Already generating a lot of interest, being carried around on the roof racks. Will be a solid daily launcher
The racer 8 sub will fit to this one too, but I haven't been able to carry forward anymore work on that. Too much other stuff going on and pointless to engage in further design until I can make a new station for the CNC. On the urgent to-do list as my mini disco sound system also cannot start without that machine too
Spent the new-found time yesterday getting back to some fishing. Caught a nice Spanish Mackerel (AU variety). Some pics soon of the new baby of the fleet getting put together