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Tethrd Carbon Fiber Platform

Not sure if this has been asked or if it’s even known. Do carbon products new or in the past have metal of some sort to be reinforced? Or solid carbon?
 
I understand in the past if i had a carbon arrow injury in my arm or otherwise I'd be a little apprehensive. Thankfully I have not. Every hunter I know shoots carbon. I know the technology is always improving over years past. I personally will let the testers do their thing,let it come out to market, let it go threw a full hunting season with real world reviews then I will buy. I love the size of bigger platforms like the xl. My size 13 feet appreciate the room. If I can get that size platform at half the weight it's a HOMERUN!
 
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Plebe said:
It would be interesting to see this later part quantified.
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I have a 99% cf platform and feel no difference. In single digits water will still freeze on it when it lands. I haven't tried bare skin sticking to it though.... though I don't know many people who hunt barefoot in below freezing temps.
 
Bowtie747 said:
Not sure if this has been asked or if it’s even known. Do carbon products new or in the past have metal of some sort to be reinforced? Or solid carbon?
Click to expand...
Only bushings for the bolt hole. I made one that's held together with methacrylate mostly except the brace and hinge points. I do have aluminum angle for the tree spike parts because cf is too soft for that purpose
 
Samcirrus said:
I have a 99% cf platform and feel no difference. In single digits water will still freeze on it when it lands. I haven't tried bare skin sticking to it though.... though I don't know many people who hunt barefoot in below freezing temps.
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Thanks for sharing. We're hearing a big sales pitch from Tethrd and TN on this, but no data.
 
Samcirrus said:
I have a 99% cf platform and feel no difference. In single digits water will still freeze on it when it lands. I haven't tried bare skin sticking to it though.... though I don't know many people who hunt barefoot in below freezing temps.
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it isn't the temperature (all things will get to same temp), it is the thermal conductivity

heat from your feet (which the rubber should help stop from moving) is easily absorbed and conducted through metal and then the metal is hanging out like a big heat antenna letting all that nice cold wind rob it of its heat

it's sorta like a piece of wood and a piece of metal will be 20 F if left outside in that temperature and water will freeze in both (if both are turned into a bowl), but the wood will not feel as cold to the touch because it takes a lot longer for it to heat up from your touch
 
Samcirrus said:
Only bushings for the bolt hole. I made one that's held together with methacrylate mostly except the brace and hinge points. I do have aluminum angle for the tree spike parts because cf is too soft for that purpose
Click to expand...

This is possibly a significant difference between the Tethrd prototype and TN. It looked as if Tethrd had a CF standoff. TN seems to use jagged aluminum teeth.
 
raisins said:
it isn't the temperature (all things will get to same temp), it is the thermal conductivity

heat from your feet (which the rubber should help stop from moving) is easily absorbed and conducted through metal and then the metal is hanging out like a big heat antenna letting all that nice cold wind rob it of its heat

it's sorta like a piece of wood and a piece of metal will be 20 F if left outside in that temperature and water will freeze in both (if both are turned into a bowl), but the wood will not feel as cold to the touch because it takes a lot longer for it to heat up from your touch
Click to expand...
I understand, and actually dont think either material makes a lick of difference because the air is a better conductor of heat and you lose heat from your boot to the air not the couple square inches or less that are contacting the platform.
 
But yes, CF is a worse thermal conductor than metal. It really doesn't matter in this instance, I feel.
 
Patriot said:
help me out here. I am a world class GIRLSCOUT when it comes to cold feet on stand. I have lacrosse boots that I think are like 1800 insulation or something and my feet still freeze.

how much of that can be influenced by the material? I use a predator. I’ve read of guys adding a carpet on top. Does it make a difference? What about doing vet tape on all surfaces?

crap I just hijacked the thread with a random question sorry. But help me out!
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See posts above.
 
For anyone worried about strength and durability....I can't speak for Tethrd's platform as I haven't seen one, but my platform uses 2 angles of cf (1/8") and the center U channel is only an 1/8" thick. I reinforced the bond of the angles to my main platform with a couple bolts so it's not just "glue". Its super solid and not a crack or delamination.
I'd think tethrd would have tested it plenty and theirs looks heavier and stronger than mine.
 
Samcirrus said:
I understand, and actually dont think either material makes a lick of difference because the air is a better conductor of heat and you lose heat from your boot to the air not the couple square inches or less that are contacting the platform.
Click to expand...

I think the air is a convective element in heat transfer. Either way, it'd be intsresting to see the rates of transfer: aluminum & CF vs air.

I believe conduction is slower than convection?

But to your point, the area of convection is large, and you've not seen a significant advantage even with a mostly solid CF build, so I am somewhat dubious to the "warm feet" advantage.
 
Also mine weighs just over 2 lbs without my foot pad.
However 2 big differences.....are sound and wear. CF is alot more hollow sounding and loud compared to metal. I'd be interested to see how loud that is(Tethrds) compared to the aluminum version. Mine needs spray foam to dampen the noise. I didn't do it during the season for scent purposes.
 
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Plebe said:
I think the air is a convective element in heat transfer. Either way, it'd be intsresting to see the rates of transfer: aluminum & CF vs air.

But to your point, the area of convection is large, and you've not seen a significant advantage even with a mostly solid CF build.
Click to expand...
Yep, you're right. I got stuck thinking conductive to the carbon/metal....
 
Samcirrus said:
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I understand, and actually dont think either material makes a lick of difference because the air is a better conductor of heat and you lose heat from your boot to the air not the couple square inches or less that are contacting the platform.
Click to expand...

i don't mean to have to get the last word, but the air isn't a better conductor of heat than a metal

the air is able to cool things quickly via convective cooling

when you 'attach metal to your feet', you put something on your feet capable of conductive cooling

that larger surface area is then prey to greater convective cooling from the air

(cooling is generally conductive, convective, radiative, or evaporative)


if you look at the conductivity values, air is many times less conductive than aluminum

it is just that wind blows, which then causes convective cooling, but we've all noticed that

when you stand on metal, the heat from your feet tries to warm the entire structure and the wind then hits the metal and moves the heat into the air, making room for more heat from your feet to the metal...you've basically 'enlarged your feet' with the metal so that convective cooling happens more quickly

specific heat capacity also plays a role (why 55 f water feel colder than 50 f air)

insulated jackets largely work by trapping air, due to the properties of air, and not allowing it to move, which would cause cooling via convection
 
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