John Minchell Posted November 29, 2021 Share Posted November 29, 2021 I have a motorcycle heated inner jacket which I would like to use when flying so I don't freeze over the winter. I have a number of 3 cell lipo packs which would be nearly 12volts straight off charge and could power the jacket. How and what do I make up, to be able to work out how long each pack will power the jacket before becoming too far discharged and would it be possible to to utilise a controller of some sort to vary the heat down and up. The jacket is 35watts at 12volts when plugged into the bike accessory power feed. I make that nearly 3amps current draw. Whatever I make or buy, it has to be portable and fit into a pocket along with the LiPo. Any and all help from the electrical wizards on here will be much appreciated. John M Quote Link to comment Share on other sites More sharing options...
Andy Stephenson Posted November 29, 2021 Share Posted November 29, 2021 John, You could use a brushed motor controller with a servo tester to vary the heat and it would have the added advantage that it would cut off before over discharging the battery Quote Link to comment Share on other sites More sharing options...
John Lee Posted November 29, 2021 Share Posted November 29, 2021 As Andy says, but most of the brushed controllers are set up for NiCds or NiMhs so may not have the required cut off. However for less than a fiver there are lots of low voltage warning devices that plug into the balance lead of the LiPo, eg: https://www.flyingtech.co.uk/accessories/1-8s-lipo-battery-tester-low-voltage-alarm Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted November 29, 2021 Share Posted November 29, 2021 Luxury...I relay on porriage and being well wrapped up. I have an out of date immersion suit for biking and handle bar muffs, even get tooo hot sometimes in winter weather. I use the suit and half fingerless gloves for winter sloping, but the hike for the car/bike to the slope can generate a hot of heat. Quote Link to comment Share on other sites More sharing options...
john davidson 1 Posted November 29, 2021 Share Posted November 29, 2021 A wonesy, or is it onesie ok then insulated boiler suit is available from places that sell kit for working in cold stores , toasty Quote Link to comment Share on other sites More sharing options...
Cuban8 Posted November 30, 2021 Share Posted November 30, 2021 (edited) Lipo alarms are available that bleep a warning/flash an led etc when voltage approaches minimum - they plug into the balance lead, use them on my 'leccy helis. Got mine for a few quid from HK but must be available elsewhere. Search Ebay - plenty available. My remedy for cold/damp/muddy flying conditions is to stay at home - spent a couple of hours gardening over the weekend and got chilled to the bone, just can't stand about over a freezing cold winter flying field these days and dressing up like the Michelin Man doesn't really float my boat. Edited November 30, 2021 by Cuban8 1 Quote Link to comment Share on other sites More sharing options...
John Minchell Posted November 30, 2021 Author Share Posted November 30, 2021 Thanks chaps - I will get one of the LiPo alarms as they are cheap enough - a mate also suggested trying a 2 cell pack and it may give enough heat, if not then try the 3 cell pack with out having to get a power regulator. Some experiments needed. John M Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted November 30, 2021 Share Posted November 30, 2021 I have a pair of heated gloves which have small 2200S1 Lipo in the back of the glove. They come with a charger There is a button on the back of each glove with three heat settings. Not cheap but boy are they good. Get them from Amazon. They are called "Intelligent Heat" I would not want to fly with them on but take them off to fly and put them back on afterwards. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted November 30, 2021 Share Posted November 30, 2021 I have also got a pair 4 years old and still working well, and dirt cheap. Quote Link to comment Share on other sites More sharing options...
john davidson 1 Posted November 30, 2021 Share Posted November 30, 2021 I have had a hand warmer for many years powered with lighter fuel and a catalyst, once you start it it lasts all day, but a friend has just got a better pair of lithium ones called OCOOPA which you can start and stop so going to look up the web,could make a nice Christmas pressie! Quote Link to comment Share on other sites More sharing options...
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