Mean Machine and LSO "Need setup"

[T.C.]

We have one of the water damaged Mean Machines and are wanting to run it as a LSO at the NATS .
We can go either SV or UL power, the boat has a 1/16" wire drive installed with the motor mounted very close to where the gas engine was.
Radio box has been removed and carbon fiber matt floor epoxied in place.
Anyone have a good CG, battery placement, prop size, strut angle and depth ect......
We would GREATLY appreciate some help !!!!
Thanks T.C.

[dana]

ul-1 power would be faster. x440 prop would be a good start. batteries 9 1/2 from transom in the sponsons. i set my strut so the center hub of the prop is right in line with the bottom of the sponsons . thats jmo. i built one over the winter, used a bigger motor but heres the thread if you want to look http://forums.offshoreelectrics.com/...ad.php?t=20769

[steveo]

i'm sure with proper setup both combos will result in equal speed, i would start with strut 1/4" above the sponson, i am currently setting up a lso cat for the up coming event using a proboat 1500 kv and x445 prop still needs work , the strut right now it is 3/8" above sponson but it is a different design than the MM

[Skipster]

my MM is a Nautiboyz rebuild
now running an 1820kv FSD motor

strut top at 5/15" above sponson level

prop Octura X437/3

COG 8.75" from transom

Batteries 5s1p

ran this morning on a 1" chop (smooth for here)
boat was bouncing so I moved the
Batts up 1 inch
COG at 9,5

and re ran the test
boat leveled out and was not running wet

results:
30.5 mph GPS
80.5 A on Watts meters
98 *F motor
95 *F esc

[steveo]

look at these threads

http://forums.offshoreelectrics.com/...earchid=467292

[T.C.]

Thanks for the replies:
We have tried both the SV and the UL motors, with the same results.
It is running wet and we cant get it to bring the nose up, we have a x442 prop on it and was advised to lower the strut ?
If we can get the thing to loosen up I think it will run, this being our first cat type boat ,we haven't a clue ?
Again this is for LSO to run at the NATS so any advise or real life experience with the boat and same motor setup would be great.
T.C.

[Brushless55]

My CG is at 8 1/2" from transom and the bottom of the strut is 1/8" above the bottom of the sponsons

works good for me

[Reed Eagle]

Terry,

Try setting the c.g. at about 30 per cent from the transom and the center line of the propshaft at 3/16"-1/4"

This should help.

Ol' Reed

[T.C.]

We got the CG correct, I think were missing the prop depth ?
I'm sure were below the bottom of the sponsons.
That will change this week.
Thanks Guys !!
T.C.

[Brushless55]

Looking forward to hearing a good run T.C.
I just put in a MG motor and esc and will try a X642 on mine, I hope this weekend..

[Steven Vaccaro]

Setting up a mm lso myself, how did this ever end up?

[T.C.]

Hope to try it this weekend?
T.C.

[Fluid]

My MM works best with the AQ1800 Kv motor and an m445 prop. CG is at ~29% and prop is about 1/4" above the sponsons and angled up a couple degrees at the prop end. The BJ motor was too low in Kv and the UL-1 overheated with any decent prop or speed.



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