scopemobile
Member
Posts: 99
home town/country: Glasgow/Scotland
|
Post by scopemobile on Jan 19, 2020 18:55:07 GMT
there is an article in this weeks New Scientist magazine, describing the us army's investigation of loss of dexterity in hands and fingers in extreme cold conditions .john castellani and his team have come up with electrically heated arm bands (dew heaters spring to mind). the arm bands act as a heat exchanger, and hot blood flows to the fingers increasing dexterity by 50% and finger strength by 90%. compared to unprotected fingers at zero temperatures. This idea could come back full circle to astronomers, allowing them to operate their scopes withoot thick gloves to hinder them. an umbilical cord from the scope would give 12 volts, or a bandolier of rechargeable batteries for mobility.
|
|
|
Post by davy on Jan 19, 2020 20:34:20 GMT
Need a few of them for when I'm at work lol,,
|
|
|
Post by howie1 on Jan 20, 2020 1:15:18 GMT
there is an article in this weeks New Scientist magazine, describing the us army's investigation of loss of dexterity in hands and fingers in extreme cold conditions .john castellani and his team have come up with electrically heated arm bands (dew heaters spring to mind). the arm bands act as a heat exchanger, and hot blood flows to the fingers increasing dexterity by 50% and finger strength by 90%. compared to unprotected fingers at zero temperatures. This idea could come back full circle to astronomers, allowing them to operate their scopes withoot thick gloves to hinder them. an umbilical cord from the scope would give 12 volts, or a bandolier of rechargeable batteries for mobility. Neat idea. Saves cutting the finger tips off my Winter gloves in future! Wonder if a peltier cooler would operate in reverse? Cooling an armband thus cooling the blood so the arms etc felt cooler in our Summers. Like a poor mans version of a motor racing 'chiller suit'?
|
|
|
Post by Dragon Man on Jan 20, 2020 12:42:22 GMT
Yes Howie, Peltier coolers work to cool and heat. You simply use the hot side for heat and the cold side for cooling. But it would be easier to build armbands the way we make our scope heaters, with Nichrome wire.
|
|
|
Post by davy on Jan 20, 2020 13:04:34 GMT
I bought a couple of these a while back
|
|
scopemobile
Member
Posts: 99
home town/country: Glasgow/Scotland
|
Post by scopemobile on Jan 21, 2020 19:59:30 GMT
the us army team did'nt mention frost bitten toes in their studies, a gaiter (used by mountaineers) could be wired up, as in ken's dew heater design. would supply warm blood and prevent contracting of the arteries and veins which stop the blood flow. the gaiters and armbands could be made interchangeable and adjustable. a warm astronomer is a happy astronomer.
|
|
|
Post by Dragon Man on Jan 22, 2020 9:29:16 GMT
|
|
|
Post by davy on Jan 22, 2020 10:45:25 GMT
Remote viewing from the house,, even better
|
|