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32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was -
To what temp are you planning to heat up your lipos to? 45 degrees celsius is a good recommended temp.Comment
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I was thinking about 100f would be good. Really shouldn't take much. It's been cold in my shop and I didn't warm them up before running yesterday like I should have. 75f today, too bad I have to work. I get off at 4:45 but takes me 45 minutes to get home.....still gets dark too early right now to get any runs in. I'm off this weekend so I'll just have to wait. Killing me over that 2mph lol.32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) wasComment
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Thought you built some of these boats for people-- for a living!
Check out these threads... apparently around 45*C is where the temp where the lipo runs at its best/peak.
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Thought you built some of these boats for people-- for a living!
Check out these threads... apparently around 45*C is where the temp where the lipo runs at its best/peak.
http://www.rcgroups.com/forums/showt...ght=heater+box
No I don't build them for a living. If I did I would be poor!
I don't like to "cheat". Heating up lipos is akin to icing your intake at the drag strip on a car engine. Doesn't run with an iced intake on the street. So when I was into racing car I was never one to do that, cheeseball if you ask me. Anyway, I just wanted to warm the cells to simulate summer running as a few days ago it was 30 something and then all of a sudden it was 70 this weekend but still ice cold in my shop. I don't want to make warming batteries a habit. I'd rather things do it without that type of help. We shall see. I still can go up drastically on prop. My Rivercat gained a good bit going up in pitch.
***no offense to the people who warm batteries or ice their intake lol***32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) wasComment
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Lol well, the general idea is that you are "split testing" different things for any noticeable speed gains.
Either way, it's not like you're competing against someone as a sport or anything. I wouldn't say its cheating like using steroids in the Olympics... unless you're a bicyclist like Armstrong where everyone used steroids anyway.
But if you're at a SAW competition and just about everyone is visibly warming up their lipos for that extra "edge" (be it a few extra mph)... then might as well do it too at that point, you know.Comment
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I was warming mine in the early spring last year but just to a workable summertime temp as Travis states. A coupler 'magic bags' in a cooler with lipos for the duration of the journey to the lake is all I did. They warm up pretty quick in a couple passes.
BTW: that same 45 degree warming also takes from their overall life ( or so I have read).Comment
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32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) wasComment
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Are you sure? Can you show me where you have read it?
The common conception seemed like It seemed like warming them actually IMPROVED their life span (if anything!) especially due to the fact that it lowers the lipo's internal resistance...Comment
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Sorry Dmitry I do not recall where I read it. I have been reading a lot as of late on batteries as I switched my entire work tooling to cordless.Comment
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Been racking my brain trying to think of ways to add 2mph without affecting the ride attitude or making the hull lift off the water. Picked up some ideas from a friend (sometimes the obvious can elude you) and I piddled a little on it. I don't want to foll with the strut or the prop so I'm splitting hair at this point. First thing is I later down the cooling line outside the hull. Wind resistance. At 100 every little counts I guess. I also got rid of the big antenna cap and replaced it with heat shrink. I'm sure this didn't do anything but it looks better lol. Then I decided I wanted to cut a little bit of drag, so I took away two of the six roller bearings in the strut. But. I found an issue. Two of the bearings had come apart. I know why. I've made the same mistake before, you'd think I'd learn huh? I have to barely polish down the stub so it will slide in and out the bearings as the cable contracts under load. Well I failed to do it all the way to the drive dog. When it fits tight on the bearing, the cable shrinks and forceably gets pulled into the bearings and then back out, ripping them apart. So that's taken care of now. I thought I had smoothed and polished the flex, well seems as if all my speed efforts here lately have gone to the Rivercat, so I smoothed and polished the flex on this one. Hopefully the attention to detail this go round benefits me. I can't wait till Saturday. O and I got rid of the green pool noodles and replaced them with black solid ones. Also added a couple pieces towards the front.
32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) wasComment
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Please describe how you smoothed and polished the flex.Comment
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I chuck it up in my drill, I chuck up the end that goes in the collet. You don't want that part of the cable smooth. Spin it in the drill and smooth it out with some 400 grit wet sand paper. Then I move up to 1000 grit wet paper. Once it's smooth (don't take long and I don't reduce the size of it) then clean it off and put a little mothers wheel polish on a microfiber rag up and down the shaft. Clean it. I repeat this another time or two.32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) wasComment
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I have not done this as of yet, I imagine my Fantasm ones have done themselves by now. But maybe I'll give it a shot after my first go out this year. You know I'll also be looking for anything more.Comment
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