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Hi,
So I have one of these, http://www.joysway-hobby.com/Product_show.asp?proid=479 . Its a 580mm (hull length) 3 point hydro. I love it, easy to use, goes quick. A couple of things have been eating at me, well nibbling really:
1: I would like to lower the current load on the batteries, it peaks around 102 Amps on 4s. It's not a ridiculous figure I know, but my current batteries run a bit warm. Granted this is might be more a reflection on the batteries, my current packs measure 14mill ohms and 10 mill ohms internal resistance, they aren't cheapo's by any means but maybe not as fresh as they once where.
2: More speed would be nice.
3: I have a Leopard LBP3674 2650Kv motor laying about.
4: Motor runs warm to hot. A bit warm for my liking. (I can obtain a figure if need be)
The stock motor is 4 pole, 36mm dia by 60mm long @ 3000kv (This figure is measured as Joysway don't give it a Kv spec, measured using drill press method and actually driving it, both methods point to around 3000kv).
Stock ESC is 90A, 6s capable.
Stock wattage is around 1350W with fresh batteries.
Stock prop is 3 blade alloy at 37mm dia, no pitch data given.
So I was pondering about maybe using the LBP3674 2650Kv on 6S, (I know this negates point 1: as I would have to buy new batteries) but I suspect this is not the way to go. I suspect a 40mm motor on a larger prop is going to be more like the job.
Although I am a well experienced modeller, I have no problem making things "fit" and machining things if need be, I have little experience with this sort of thing.
The question really is: Is a 40mm motor better suited ? and what size prop ?
Any data you need just ask and I'll stick the logger in again and take it for a run. I have seen a few Youtube videos that offer sage advice on a good upgrade, but the vagueness is so stunning I have chosen to ignore them all.
Cam.
So I have one of these, http://www.joysway-hobby.com/Product_show.asp?proid=479 . Its a 580mm (hull length) 3 point hydro. I love it, easy to use, goes quick. A couple of things have been eating at me, well nibbling really:
1: I would like to lower the current load on the batteries, it peaks around 102 Amps on 4s. It's not a ridiculous figure I know, but my current batteries run a bit warm. Granted this is might be more a reflection on the batteries, my current packs measure 14mill ohms and 10 mill ohms internal resistance, they aren't cheapo's by any means but maybe not as fresh as they once where.
2: More speed would be nice.
3: I have a Leopard LBP3674 2650Kv motor laying about.
4: Motor runs warm to hot. A bit warm for my liking. (I can obtain a figure if need be)
The stock motor is 4 pole, 36mm dia by 60mm long @ 3000kv (This figure is measured as Joysway don't give it a Kv spec, measured using drill press method and actually driving it, both methods point to around 3000kv).
Stock ESC is 90A, 6s capable.
Stock wattage is around 1350W with fresh batteries.
Stock prop is 3 blade alloy at 37mm dia, no pitch data given.
So I was pondering about maybe using the LBP3674 2650Kv on 6S, (I know this negates point 1: as I would have to buy new batteries) but I suspect this is not the way to go. I suspect a 40mm motor on a larger prop is going to be more like the job.
Although I am a well experienced modeller, I have no problem making things "fit" and machining things if need be, I have little experience with this sort of thing.
The question really is: Is a 40mm motor better suited ? and what size prop ?
Any data you need just ask and I'll stick the logger in again and take it for a run. I have seen a few Youtube videos that offer sage advice on a good upgrade, but the vagueness is so stunning I have chosen to ignore them all.
Cam.
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