some tech info needed on a new CAT project

[omega]

Hello Guys

I am new to electric boats (racing gasoline boats at moment). I have a 30 inch Aeromarine Cat Hull that I am setting up with a 6s Feibao 580 brushless motor, 180Amp Turnigy Marine ESC.

The shaft will be 3/16 for a 1/8 prop.

Can you guys suggest a good propeller diameter for this set up?

Cheers
Andre

[ozzie-crawl]

what hull and what kv motor

[omega]

Katamaran from Aeromarine, 30 Inch long, Feibao 580 9L, 1,426 RPM per Volt... think is about 1450KV ?

[BakedMopar]

I dont think you would want to run a 1/8" prop. At least 3/16".

[ozzie-crawl]

okay i am taking it that its a mean machine, imo its a bit of over kill
a 540 xl would be a better choice.or a neu motor on 4s
other than that try a y537/3 prop from octura, you will want a .187 flex and 3/16 shaft

[ozzie-crawl]

read threw this lots of good info http://www.offshoreelectrics.com/forums/showthread.php?t=751

[omega]

thanks mate, been given the feibao as a suggestion from the guys at offshoreelecrtics.... you think drivable with a 6s 3850 TP packs? more for top end rather than competitive racing.... not much going on around here (Singapore) for electric... lots of gassers...

[ozzie-crawl]

if you havent brought the motor yet and want to go 6s a neu 1515 1.5y would be a very good setup.
a decent 4s setup like a neu 1515 1y 2200kv on 4s 1p 5000 would be good as well.
the feigao 580 is a heavier motor and less efficient than the neu
the neu is $90 more expensive but well worth it.
o.s.e also has the 1415 1.5y in stock and is only $50 more than the feigao this to would make a very nice 6s motor

[omega]

unfortunately i bought it motor the other day in hong kong... for a 100 USD so good price i guess? i get a feeling that i should have worked on a 4S set up... do you see any major set backs if i go with the big motor and 6S?

[ozzie-crawl]

the motor is fairly heavy but will produce more than enough power,i was just trying to give what i thought was better options.
that motor on 6s will still be a very strong setup,imo a little heavy but if pushing for high speed the extra weight may help.
one thing if your pushing for speed i would get on of these hatches, much easier to tape down and less likely to come of in a flip http://www.offshoreelectrics.com/proddetail.php?prod=ffrb-mm-cowl&cat=123

[omega]

thanks man, great advise... should be a fun boat... is a older aeromarine hull , shoe box design.... i will keep you posted here how this all ends up

[justintime2w8]

Shoe box is great as long as you can keep the lid on the box:-)