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looks great other than some rear end hop which no doubt you will set correctly with either a different prop and or strut adjustment. what size motor did you end up using ?
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I went with the Leopard 4092, 1390KV on 8s. Alright, please tell me about the rear end hop. I didn't even know of that term to describe it. I just prepped this prop and it seems to be closer to waking the boat up, so what strut adjustment helps the rear end hop?
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Bring the strut up to get rid of the hop, small amounts at a time.NZMPBA 2013, 2016 Open Electric Champion. NZMPBA 2016 P Offshore Champion.
2016 SUHA Q Sport Hydro Hi Points Champion.
BOPMPBC Open Mono, Open Electric Champion.Comment
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other causes will include the prop and cog. if the rear of tub is too light it will want to bounce [ hop ] you don,t want a lifting prop on this rigger as there are rear sponsons to keep the back riding well.Comment
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Here's a video with some trim changes...
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Got out and ran the RSX380 again. Raised the strut a bit more and set some more positive angle to the strut. Now I know I need a prop change.
I did not like how it turned, it over steered and had some kind of hop going on. Need a higher rake prop...
So I did a SAW run and broke eighty!
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well, you are starting to gain some good speed now , looks great. as your now doing just play with props / strut heights and c.o.g. plus different turn fins certainly help in correcting not so good turns. not sure if you do need to use lifting props on this rigger as you do have 2 x rear sponsons that do hold the rear up at the correct level.Comment
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I'll try a higher rake prop next. As I said in the video, I've raised the strut bottom 3/32" above the rear shoes. Feels like I've lost some handling with that setting. Batteries were all the way back. From memory, the CG is around 75% of the measurement from the prop to the back of the sponson ride pads...
Sent from my SM-G950U1 using TapatalkLast edited by sammyha; 07-25-2019, 07:03 PM.Comment
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so where is the boat balancing when you test the c.o.g. ? should be around the trailing edge of turn fin normally. also can you reduce abit of rudder throw as the model does look like its turning sharp so maybe less throw might correct handling issues aswell. have you tried any octura x or m series props yet ?Comment
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The c.o.g. is right at the turn fin trailing edge.
Hmmn, I setup up three drive modes, each with differing dual rates, 100%, 75% & 50%. Suppose I should try them, huh? Forgot about using them and it wasn't a problem running slower... [emoji57]
Please recommend Octura props in the X or M series that compares in size to what I'm running now. It's a ABC 2018-10-50(2)-CLL. And why to use them? They don't list their rake angles, so I didn't buy any.
Thank you for all your help...
Here it is, balanced on a spare boom tube...
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Paul, [ 758boats ] will know the good cog spot and blade size as he runs a fast ml rigger. as for the octura props, sizes of around x447 / x645 / x646 may be good for oval set up.Comment
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Thanks. Yeah, those are smaller diameter and pitch props than what I started out with.
I've been headed that way with the props I'm trying now.
And there's the OSE calculator numbers and there's real world experience. It gave me a starting point anyway, even tho I leaned toward the optimistic side which seems to stress FE electronics...
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A couple of shots of the RSX380 on the water...
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don,t those octura x series props have less pitch than your 2018 abc ?Comment
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