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Old Sep 11, 2011, 04:25 PM
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kruiser7's Avatar
United States, WV, Beckley
Joined Feb 2008
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Brushless Hydro Build

Finally starting to get a break in work, summer is over. I gained a lot of information from you people on my last adventure, and am now ready to do a serious brushless hydro. I was finally able to obtain the hull that I want to use from a friend of mine that never got around to finishing it. It is an Aeromarine Sport X Hydro. It measures 50" long and is 25" wide at the forks. It is complete with all of the Aeromarine hardware , and has a modified BH Hanson aluminum motor. The boat has neven been finished. I always like the massive size of the boat and glad that I now own it! I am ready to start buying up the new power system for it. I want it to be CRAZY fast ! I want it to be single brushless power. What I am asking for is some good advise on a motor and ESC. I will appreciate any and all input into this. And thanks! Its great to have the time now to devote it to my hobbies!
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Old Sep 11, 2011, 04:32 PM
I feel the need for speed!
scorpion1's Avatar
Southern U.S.
Joined Jun 2008
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The most powerful motor that i can think of without getting into Lehner's is the Neu 2230. Neu makes motors that are available in 2215, 2220, and 2225 as well. A Castle 2028 is another great option and powerwise its right along with a Neu 2225. You will need 9-10s lipo minimum and possibly 12s in 2p config. with the 2230.
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Old Sep 11, 2011, 06:34 PM
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United States, WV, Beckley
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That are the motors that I have come up with so far myself and seem like good choices, just not sure what the top end in speed might be. I hear a lot about the Lehner motors also, but the only place I have seen them is FineDesign, and Im not going to that subject right now, lol, thanks Scorpion , Seems like some good choices, but what kind of RPM's do you think useing 12s and a ball park figure in top speed. This is a pretty good sized boat.
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Old Sep 11, 2011, 07:11 PM
I feel the need for speed!
scorpion1's Avatar
Southern U.S.
Joined Jun 2008
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I run a Castle 2028 and 9s2p in my 50" Hydro, allows me to spin a bit larger prop. RPM's are in the 26,000 range.

Here's my "Big Red"

...

50" Hydro Castle 2028 WOT runs (2 min 3 sec)
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Old Sep 11, 2011, 07:32 PM
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United States, WV, Beckley
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VERY impressive Scorpion,, seems to both run and handle extremely well! If you wanted to push it a little farther , what would you do? Different motor, more battery?
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Old Sep 11, 2011, 07:51 PM
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Canada, ON, Whitby
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What do you consider "crazy" fast?
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Old Sep 11, 2011, 07:57 PM
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I am very impressed with Scorpion's hydro, it is awesome!!!! To be honest, I can only afford one shot at this, and it has to be the best that I can do. I want to make this big hydro do all it can do.
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Old Sep 11, 2011, 08:07 PM
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I want to push this hydro close to 100 mph. This is a very serious attempt to build something that I have wanted for a long time.
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Old Sep 11, 2011, 09:15 PM
I feel the need for speed!
scorpion1's Avatar
Southern U.S.
Joined Jun 2008
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100 mph is a bit much..............one thing goes wrong............hit a stick, bad hop on a wake................and you're toast.

But if you want to go all out, go for a Neu 2230 1y 725kv on 12s Lipo................or for 100 bucks more a Lehner 3080 8 turn on 12s.
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Old Sep 11, 2011, 09:24 PM
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United States, WV, Beckley
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Scorpion, I do realize the "cons" of going this fast. I do appreciate your help and input, and I truly value what advise you have to share. Like I said, I can only afford this once, no trial and error, this is something that I have to do. Can I purchase the Lehner somewhere other than from Chris Fine? I had a bad experience with him before, and I dont now if I can trust, or deal with him again.
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Last edited by kruiser7; Sep 11, 2011 at 09:29 PM. Reason: wanted to add more info.
Old Sep 11, 2011, 11:10 PM
I feel the need for speed!
scorpion1's Avatar
Southern U.S.
Joined Jun 2008
7,196 Posts
You can google Lehner motors...............they sell them in Germany and a few other sites i believe. I'd just go with a Neu 2230 from Steven at OSE. He backs his products with the warranty it comes with and you dont have to go thru a bunch of crap to get it done if need be. A Neu 2230 1y on 12s should get you into the mid to high 70's on 12s.
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Old Sep 12, 2011, 02:20 AM
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Australia, VIC, Blackburn North
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I like your 10S run better.
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Old Sep 12, 2011, 02:58 PM
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United States, CA, SF
Joined Sep 2006
51 Posts
I also have a question not to steal the thread about your post.
I have a 52 inch cat. I just finished installing the Leopard Motor and a 240HV ESC.
I plan on runnng it in series at 18.5v each side so I have 37 volts to run.

Question is..... I was instructed to install a X452 prop.
Is that prop too small for the big cat?
I ran it last time with the prop similiar to the 275 Octura and the ESC burned down on me
I mean flame coming out.
I finished the job and never had the chance to run it yet.
So, 37 volts on a 52 inch cat running on a Leopard motor 1090KV with the King Fisher 240HV ESC. Is this a good combo for the prop?

Thank You for all the inputs.

Julio.
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Old Sep 12, 2011, 04:06 PM
I feel the need for speed!
scorpion1's Avatar
Southern U.S.
Joined Jun 2008
7,196 Posts
I assume you are referring to a 5692 Leopard. I would not recommend 10s for that motor if its the 5692 1090 kv, 8s is better witha bit more prop like in the 55-57 mm range. If you are set on 10s i would go smaller like has been recomended to you.
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Old Sep 12, 2011, 04:35 PM
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rotorkilla's Avatar
Stoke-on-Trent, UK
Joined Nov 2010
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You can get Lehner motors from here in Germany, they are a reliable supplier;

www.hydromarine.de
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