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andym
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PostPosted: 12:11 - 09 Dec 2010    Post subject: is it cheating.... Reply with quote

.... to warm yer mitts on the exhaust on these rather mild winter nights?

Takes me about 45 minutes to get home and last night I had to stop 3 times to try thawing my hands out a bit.
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t121anf
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PostPosted: 12:46 - 09 Dec 2010    Post subject: Re: is it cheating.... Reply with quote

andym wrote:
.... to warm yer mitts on the exhaust on these rather mild winter nights?

Takes me about 45 minutes to get home and last night I had to stop 3 times to try thawing my hands out a bit.


be careful not to burn yourself
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andym
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PostPosted: 13:19 - 09 Dec 2010    Post subject: Reply with quote

with woolly gloves and bike gloves on.... it usually takes a couple of minutes just to feel any kind of heat coming through.

Mind you I have been thinking of heated grips or gloves...
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Hywel
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PostPosted: 13:20 - 09 Dec 2010    Post subject: Reply with quote

Nope, just don't touch the can or your gloves will melt Razz

I've been known to hang my arms down either side of the cylinder block like an ape for warmth while waiting for lights.
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stinkwheel
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PostPosted: 13:23 - 09 Dec 2010    Post subject: Reply with quote

Depends on the exhaust mind. The stainless Micron can on my VFR never gets more than hand-hot. Carbn cans are usually fairly cool too. Others could take your skin off in seconds.

I used to ride my moped with one hand on the engine in the winter, then swap hands (throttle cable was stiff enough to stay put).
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27cows
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PostPosted: 13:41 - 09 Dec 2010    Post subject: Reply with quote

Engine is easier than exhaust, and usually more effective (and less likely to set your gloves on fire Laughing ).

It's not cheating. You're out there in horrific weather, you have to do whatever is necessary to stay warm.
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DrDonnyBrago
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PostPosted: 13:45 - 09 Dec 2010    Post subject: Reply with quote

My can never really gets very hot, use it at the end of a ride to warm my hands after I take my gloves off.

There is something to be said for non faired bikes when it comes to warming your hands, I have to make do with a bit of warm frame Crying or Very sad .
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Tim..
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PostPosted: 14:02 - 09 Dec 2010    Post subject: Reply with quote

I regularly used to rest my hands on the rocker cover at lights when I had my bandit 6.

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Notj7
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PostPosted: 14:14 - 09 Dec 2010    Post subject: Reply with quote

My can gets hot.. I am screaming my bike at 9k rpm on the motorway for an hour straight, so yeah I pull over at every opportunity to warm my hands up!

Just bought some motrax muffs Mr. Green gonna give them a try tonight. I'll look like a tit, but whatever. I am a tit.
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dodsi
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PostPosted: 15:38 - 09 Dec 2010    Post subject: Reply with quote

It might not be considered cheating but I would consider it a bit daft when you could just get some heated grips.

I have just purchased and fitted some R&G heated grips and for £30 I am very pleased with them.
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Teflon-Mike
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PostPosted: 16:33 - 09 Dec 2010    Post subject: Reply with quote

It's NOT cheating.

Its what we all did, riding through the winter, in the 'old-days', (like up to about ten years ago), when heated grips were an expensive luxuary, likely to flatten pathetic batteries, and fry weak alternators, and muffs as often filled with water, and kept it in, better than they did out.

However, we also had leather gloves.... which meant that they didn't melt like modern gloves that even if they are leather, as often have a plastic treatment / coating or membrane to make them a bit more water-proof, and if we didn't oil them when we got home, they would crack, next time out.

Hint: when fingers, frozen.... take gloves OFF to 'thaw out'.

There's probably a Ray Miers video on it some-where about stripping off cold and wet clothing to warm up, sure I saw something on BBC2, but its the same principle.

Once your gloves have 'chilled' to the point that your fingers are getting cold, they aren't doing thier job, 'insulating' your digits, stopping body-heat escaping, they are actually sucking the heat out of your hands making them colder.

So, take them OFF.

Ambient air may be cold, but you'll loose heat from your fingers less fast than keeping your gloves on.

Next up, warming your gloves on rocker cover (usually the safer heat source), if your hands are inside them..... well, its to do with latent heats, but to get the glove to warm up, it will cary ON sucking heat from your hands, as it drys out and warms up.

So, if you take your gloves off, and warm them on the rocker cover, you can pant onto your mits and rub them together to get them warm and get teh circulation back, and they will warm up faster, than leaving them in the gloves.

You also dont risk burns or blains, your numb fingers not sensing that your actually cooking your fingers, if the heat-source is a bit fiearce.

And your gloves will heat-up and dry out faster, without making your pinkies colder in the process, or risk of burning them.
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Scooty
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PostPosted: 16:38 - 09 Dec 2010    Post subject: Reply with quote

Jimboo wrote:
Just bought some motrax muffs Mr. Green gonna give them a try tonight. I'll look like a tit, but whatever. I am a tit.


Laughing Thumbs Up
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27cows
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PostPosted: 16:53 - 09 Dec 2010    Post subject: Reply with quote

Best way of warming frozen hands is to take main gloves off but keep thin thermal undergloves on. Stops you burning your hands and also maintains the warmth for longer when you put your gloves back on. The secret is to not let your hands get too cold - though we rarely have weather that bitter in the southern half of the country.
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Rogerborg
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PostPosted: 17:17 - 09 Dec 2010    Post subject: Reply with quote

Teflon-Mike wrote:
Ambient air may be cold, but you'll loose heat from your fingers less fast than keeping your gloves on.


Wet gloves, maybe - depends on whether the convection through the wet gloves is worse than the wind chill on exposed hands - but not dry.

Wet or dry, the gloves can't be at less than ambient air temperature (wind chill just gets them there faster), and it's better to have any dry air gap than to expose your hands to wind chill.
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colin1
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PostPosted: 17:40 - 09 Dec 2010    Post subject: Reply with quote

Teflon-Mike wrote:

Once your gloves have 'chilled' to the point that your fingers are getting cold, they aren't doing thier job, 'insulating' your digits, stopping body-heat escaping, they are actually sucking the heat out of your hands making them colder.

So, take them OFF.

Ambient air may be cold, but you'll loose heat from your fingers less fast than keeping your gloves on.

Next up, warming your gloves on rocker cover (usually the safer heat source), if your hands are inside them..... well, its to do with latent heats, but to get the glove to warm up, it will cary ON sucking heat from your hands, as it drys out and warms up.

So, if you take your gloves off, and warm them on the rocker cover, you can pant onto your mits and rub them together to get them warm and get teh circulation back, and they will warm up faster, than leaving them in the gloves.

You also dont risk burns or blains, your numb fingers not sensing that your actually cooking your fingers, if the heat-source is a bit fiearce.

And your gloves will heat-up and dry out faster, without making your pinkies colder in the process, or risk of burning them.


I like to think that teflon mike didnt express himself clearly. H surely meant to say, take your gloves off if you are going to warm them up on something warm.

He surely cant think that gloves when cold no longer act as insulation ?

If he really thinks that, he needs to understand the difference between heat flow and temperature.

If there is a difference in temperature between two things, heat will flow from one to the other. The rate at which is flows depends on the insulation or heat conductivity. A piece of marble below body temperature will feel colder than a piece of wood below body temperature, because wood insulates heat while marble conducts it.

Gloves still act as insulation when they are cold. Their insulation properties are reduced if they become soaked through.

If anyone thinks from Teflon mike's post that gloves are best removed once they become cold, then they will end up with very cold hands indeed.
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Teflon-Mike
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PostPosted: 17:50 - 09 Dec 2010    Post subject: Reply with quote

Rogerborg wrote:
Teflon-Mike wrote:
Ambient air may be cold, but you'll loose heat from your fingers less fast than keeping your gloves on.

Your gloves can't be at less than ambient temperature. Why is it better to removing the insulating air gap between hands and gloves and expose your hands to the same temperature air without any insulating gap?
Use diagrams if necessary and show your working. [10 points]

Your just baiting me, aren't you?

Gloves will be less than ambient temp, becouse of wind-chill.

Your body is above ambient (37deg or so) Rate of heat-transfer is proportional to temperature difference. So colder it is, faster you loose heat.

Gloves work, by providing an insulating layer of 'still' air between your hands and the outside air, which warms from body heat, but cant disapate into the free air, so you have an intermediete heat-soak, taking heat out of your hands, and thence into free air, slowing the rate of heat transfer by creating two smaller, lesser temperature differences, rather than one big one.


But it only works, IF the layer of insulating air is actually warmer than ambient air.

IF your gloves have chilled to the point that the temperature of air against your skin is actually no warmer or even lower than ambient air, becouse of wind-chill, then the direct contact of hot skin to cold glove, means that the glove will suck heat from your hand as fast or faster than if you didn't have a glove on.

But, 'latent-heat' plays a big part here, too.

Ice melts at 0DegC, but while temp remains constant, you need to put heat (energy) into the ice to make it melt. Heat goes in, but temp does not rise. That's latent heat. Everything has a latent heat capacity. Even gloves.

More dense 'matter is' the higher its specific heat capacity generally is, or at least the more matter you have in contact with a heat source at any moment in time, able to carry heat away.

So, thick glove, lots of material in direct contact with skin, even if its not super-cooled beneath ambient temp, by wind-chill, can take more heat from your hands, more quickly, than ordinary atmostpheric air.

If the gloves are also damp, through absorbing ambient moisture, or sweat from your hands, even more so.

Warming gloves up on heat soruce then, you are back to the melting ice idea, and as the gloves are warmed up, they will continue to absorb heat, not JUST fro the heat soruce (rocker cover or exhaust) but also your hands.

So, taking your gloves off, can help you warm your hands up faster, but more... you loose heat from the surface area of your hands, and inside a glove 100% of your hand skin area is exposed to cold glove.

Take gloves off, and rub hands together, you reduce surface area for heat-loss, and more, moving fingers, promotes the circulation, gets blood flowing back in to the extremities, carrying heat with it, increasing hand temperature, but more importantly, the warmth you 'feel' in your hands.

Which is the important bit, 'feel', and by NOT having your cold, numb hands inside the glove as you heat it, you minimise the risk of your numb hands NOT feeling how hot the heat soruce is and actually being burned, in the time it takes for the temperature of your hand to warm, and promote blood-flow, that will let you actually feel, the heat.

Grannies grumble of sticking cold feet infront of fire giving you 'chill-blains'.... actually cooking your cold, numb extremity, before you get teh circulation to tell you its burning!

colin1 wrote:
I like to think that teflon mike didnt express himself clearly. H surely meant to say, take your gloves off if you are going to warm them up on something warm.
If anyone thinks from Teflon mike's post that gloves are best removed once they become cold, then they will end up with very cold hands indeed.


Yes. I dont mean, when hands get cold, take your gloves off and carry on riding!
I mean, take them off, warm them up, rub hands together, then put warmed gloves back on to carry on riding!

colin1 wrote:
He surely cant think that gloves when cold no longer act as insulation?
If he really thinks that, he needs to understand the difference between heat flow and temperature.

I do, see above. And yes, IF gloves have chilled to the point that insulating air is as cold or colder than ambient, insulation dont work. If glove has 'Damped', its even worse.
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colin1
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PostPosted: 17:59 - 09 Dec 2010    Post subject: Reply with quote

Teflon-Mike wrote:


Gloves will be less than ambient temp, becouse of wind-chill.


It's physically impossible for the gloves to be less than ambient temperature unless there is some form of cooling.

The concept of wind chill is just because if air is still, it warms up next to something warm, and it doesnt move away instantly. However if there is a wind removing the warmed air, cold air will be next to the warm thing, so the rate of cooling will be greater.

When people give an imaginary temperature to take account of the wind chill effect, its like saying how cold it will feel. So still air at -20 might feel about as cold as fast moving air at -5. This does not mean that the fast moving air is any colder, it just means you will feel colder as more heat will be leaving the warm thing.

Cold gloves do not lose their insulating properties magically as they get colder. Wet gloves do as the physical composition of the glove has changed as its become water logged so it conducts heat better.
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colin1
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PostPosted: 18:13 - 09 Dec 2010    Post subject: Reply with quote

Teflon-Mike wrote:


Warming gloves up on heat soruce then, you are back to the melting ice idea, and as the gloves are warmed up, they will continue to absorb heat, not JUST fro the heat soruce (rocker cover or exhaust) but also your hands.


You are confusing two different concepts. Latent heat is heat which is absorbed to change the state of something from ice to liquid, liquid to air. Heat is absorbed but there is no change in temperature.

Specific heat capacity is a different concept and is the amount of heat energy that something needs to change temperature.

The gloves will not be turning into liquid or vapourising so its not the melting ice idea (latent heat), its specific heat capacity. If the glove is wamer than your hand, it will give heat to your hand and warm it up. If your hand is warmer than the glove, it will heat the glove up. Either way, gloves will still act as insulation between the warm hand and the cold air, and the glove will have a temperature of something between the two.
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andym
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PostPosted: 19:49 - 09 Dec 2010    Post subject: Reply with quote

Jeez.... ask a silly question and come back and there's a bar room brawl goin' down.

Thanks for the info, I'll definitely try taking the gloves off and stand with my hands in my pockets until just before combustion point of the bike gloves Smile

The exhaust does get quite warm, I touched the back of the gloves to it and after about 20 seconds part of them had melted onto it Sad

Roll on the summer
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Beamexican
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PostPosted: 21:09 - 09 Dec 2010    Post subject: Reply with quote

I usually just sit with my hands behind my silencer and let the hot air coming out the pipe from the engine warm up my hands rather than risk melting my gloves actually touching part of the engine/exhaust.

Rick
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Noxious89123
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PostPosted: 22:27 - 09 Dec 2010    Post subject: Reply with quote

I used to put my gloved hands in the fairing vents on either side of the bike when sat stationary.

My hands would get so cold that even just taking the gloves off whilst I was stood outside in the cold would feel warm against my skin. Even just going into the warm house would give me "chill-blains", let alone warming my hands on the bike without gloves!

That was usually after about 2.5~3 hours out in sub zero temps. I would wear;
Thermal base layer
2 t-shirts
2 pairs of undercrackers
2 pairs of socks
2-piece leathers
1-piece waterproofs. (Excellent wind resistance).
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andym
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PostPosted: 22:55 - 09 Dec 2010    Post subject: Reply with quote

to be fair I don't ride long enough on the way home for anything else to get cold, (usually about an hour).

I wear t-shirt, shirt, jacket, anorak (with liner).
undies, thermal long johns, trousers (summer ones of course because my company are cheap miserable so and so's and won't buy thicker ones), thin waterproofs
2 pairs of socks and boots.

Oh yeah, scarf and helmet of course.... oh and the thermal and bike gloves.

I know not exactly the correct protective equipment, but I don't plan in anything other than the soles of my feet making contact with the tarmac anytime soon

My bike doesn't have any kind of vents to stick anything, although I guess if bikes had cruise control I'd have my hands in my pockets most of the way Wink
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dragstaar
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PostPosted: 10:53 - 10 Dec 2010    Post subject: Reply with quote

I got myself some heated gloves. I got the Gerbing G3s. Fook me they're awesome. Seriously, they beat anything else Hands down (no pun intended).

They're a bit pricey at £99, but defo worth the damage to the wallet. They're absolutely wonderful to ride in! no cold whatsoever.
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cb1rocket
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PostPosted: 11:05 - 10 Dec 2010    Post subject: Reply with quote

dragstaar wrote:
I got myself some heated gloves. I got the Gerbing G3s. Fook me they're awesome. Seriously, they beat anything else Hands down (no pun intended).

They're a bit pricey at £99, but defo worth the damage to the wallet. They're absolutely wonderful to ride in! no cold whatsoever.


this +1

It absolute fuc**** awesome, and a life time guarantee on the electric where I had problems were swift to deal with.

Mine are the old classic gerbings, got the heated inner jacket which works wonders, if not a bit too hot in them!
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