r111

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About r111

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  1. Torqueedo is a brushless design. RC motor + planetary reduction gear set, coupled to a very aggressive screw. The electronic driver that is used to control speed/direction in brushless motors, is very different from PWM. PROC can certainly make Torqueedo knockoff for $200 or thereabouts, not sure why they shy away from it, there're no patents there.
  2. You will see a wee bit of discrepancy between discharge and charge AH. During discharge, you draw at _variable_ voltage. It starts at 13.4V or so, goes down to say below 11V (whatever safe voltage BMS is configured for). The charge voltage, on the other hand, is constant and higher, say 14V. So you might see 20AH consumed, but charging will only take 18AH, that's normal, as same amt of actual energy is consumed and put back in, due to discrepancy in voltage levels. better meters will also show whr - watt/hr, which is a better way to measure the actual energy in and out.
  3. Have had great luck w Uniden MHS75. 7YO, still going strong, original batt and all. She went for few swims , full submersions. Whatever you get, leash it to the PFD. Learn how to make a proper Mayday call
  4. Most batts have built-in BMS (batter management system). Some electronics that makes sure of: - proper charging: current limiting, not overcharging, controlling the curve, monitoring individual cell temps - cell balancing: usually when connected to a charger, after charge cycle is complete, it will rebalance the cells, so each is charged equally - proper discharge: current limiting, protection from over-discharging, protection from short circuit. For 12V batts, when even one of 4 of the cells drops below safe voltage, the entire battery is disconnected from the load As battery approached state of full charge, you might see charging current dropping. Again, BMS is in charge here. Also, the cell's internal resistance grows, so that less current goes in. Dumber the charger is, the merrier, as it lets BMS to be in full control. 10A-15A chargers are ideal, for 40AH+ batts. Safe, yet do the job quickly. 1A charger will take about 40hrs to fully charge fully depleted 40AH battery. 2A -> 20hrs and so on. So if you come home from an outing and wanna go again tomorrow, you'd be out of luck. Dont disconnect the charger right after the charge is complete, let it stay connected to the battery, so that BMS has a chance to balance the cells. Again, BMS will protect the battery, so this is safe and desired.
  5. See my posts, all the info is there. U want a gizmo called "RC Power meter" or alike, amazon etc. Insanely good and useful
  6. Wont have any issues using LiFePo4. You'd most likely loose the motor to flooding/accident well before its resource. It is DIFFERENT from "PLAIN" lithium better, in very good way - it dont catch fire. Also runs @ bit lower voltage Dont rely on the "state-of-charge" LED readout on the trolling motor. It is designed for lead and wont give anywhere close to accurate reading.
  7. Dont get fixated though on Valence. There're $300 LiFePo4 60AH 12V batts on ebay, charger included, new. Wty etc.
  8. To rehash. The U1-12RTs, the golden standard in LiFePo4 batts, are EXTREMELY WIDELY used in assorted hospital equipment. As such, these are subject to world's most stringent regulations. These mandate periodic replacement. The schedule is tailored to lead, so end result is: 1000s of these end up in land fills every year, with 85% of life still left in them. On a funny note, hospitals PAY to recyclers to come and take them away. Find a few local recycling places. Call/visit them and chances are you can score these at close to nothing. Thats how these end up on ebay.
  9. Lots of folx swear by PWS (long stroke piston), lookup "pws mod 2 mk116" on youtube etc. I think you can get an upper, or a complete kit
  10. Yeah, had the butterflies when I first saw it @ dawn, when doggo went out to do her thing. Snapped pics in case I need to file insurance claim. Waited for enough lite to go and attempt rescue. The broken branch is probably ~2000lb, barely hanging by a thread 30 feet up in the air. Had to be extra careful to relocate the loaded up tips off the boat and onto temp support (saw horses), so I could exfil the boat. Cleared up the escape path first, as I had to work directly under that branch.
  11. Yeah, that foggy day last year will forever live in NJ yakin folklore. Hot sun hit still cold water on a totally windless day, she built up fast, couldnt see 10 feet out. Navigated by feeling the warmth of Sun on me face, so I knew which way was the south, Came ashore, did a public service. Called out on 71, said I'd blow my whistle, a few folx were thankful for help, as they were able to cue in on the sound and made it ashore
  12. Under the blue tarp is my PA14. A nasty branch ( ~12" ) snapped off the main trunk. Thankfully it didnt shear off, came/pivoted down tips first, enough springiness in there to slow down the fall. Quick exam shows no cracks, but need to be careful @ next launch, hang by shore awhile, test for leaks. 3 years ago a branch fell onto my other canoe, Coleman, cracked one of the 3 seats and structural strip on one side. Hull still good, but could never find the replacement strip (it rivets onto the upper edge of plastic, length-wise). Used to take it to local lakes in Poconos
  13. T mentioned a chief eng swore to him (recently) that 737s, with the proposed fixes applied, are the safest planes ever. FAA has to formally approve it still. Better do it quick, Boeing is easily 2% of GDP
  14. Say you're diagnosed and require hospitalization. Would you request transfer to Javits ? Or Comfort ? There, you will be treated by fed crew, as in for free. End up in NJ hospital and you might be dealing with bills for the rest of your life. Yes, Prez sez testing is free, insurance agreed to pay the entire bill, no deductibles etc etc, feds will pay for uninsured (at Medicare rates), but many of us who've been exposed to hospital bills know better.
  15. Running trolling motors like this is detrimental at many levels. Few secs is OK, to make sure of rotation/wiring, but dont abuse it past that. My Watersnake only has 2 speeds and I find myself using top speed 90% of the time, to both get to a spot and to troll lures. This past spring there were days when not much was getting caught, 'cept by me trolling at high speed. Folx wuz telling me to slow down, lil' they knew As to range estimation, you can be pretty accurate as long as you know AH that battery has left - thats where that RC power meter is priceless. But in most cases, you'd know it by gut. The 3-4 places I fish regularly, I know by heart how much juice is required for typical outing. And carrying 2 batts, I am sure to always have enough juice. Sometimes I take the motor out and put the MD in, to gently excercise em ole legs. When I decide to head back, it is almost always using the trolling motor. You're tired at that point, gotta go places, have fish on board etc