ul-1 motor/esc setup for the sv27

[brad65]

I'm thinking about switching my ul-1 motor and esc to my sv27 will it run faster? If this is a good sway to do, what size prop should I run?

[Jesse J]

I would be surprised if you DON'T get better speeds. prop? well what batts? 4S I had a X645 on my Deltaforce 26" mono and it screamed with that motor/esc on 4S... giver a shot!

[brad65]

I'm basicly using (2) 2s 4000-5200mah 25 40c burst battery with all different 42/45 props.

[Leskimo85]

Well I just put that setup in my SV27 using a octura 2 blade 646 and reached a speed of 41.1MPH. Speed was checked with a gps. The batteries were two 2s1p lipo with 30C in series. So I'm pretty pleased with the setup. And with the new ESC it has A lipo LVC. I tried a K48 prop and reached the same speed.

Have a question about the motor tho. It has some slop in the shaft. moves about 1 to maybe 2mm in and out? Was wondering if this is how the motor is or if there is something lose?

[Leskimo85]

Ok here is a video of my SV27 with the UL-1 motor/esc. Sorry for the bad quality and no sound.

http://www.youtube.com/watch?v=aRuFEjGopAE

[brad65]

Ok here is a video of my SV27 with the UL-1 motor/esc. Sorry for the bad quality and no sound.
http://www.youtube.com/watch?v=aRuFEjGopAE

Thats a big prop, have you run a full battery through her racing, not just stop and wait and go?

[Leskimo85]

I have used the 646 while racing around with the stock setup. Even done two runs back to back using nimh batteries. I haven't used the K48 much and don't really care for it.

And the only reason I was going stop and go was I didn't wanna flip it since the water is freezing and I didn't have a way of rescuing it. Would of ended up swiming. I just got the new setup in the boat and wanted to get a few runs in before it was dark so I didn't get to run a whole battery through it.

[brad65]

I'm using a 45cf now. Seem good all around prop not to much prop walk not the fastest either. I'm wondering if I will notice an increase in speed with the ul-1/esc swap?

[Leskimo85]

I'm using a 45cf now. Seem good all around prop not to much prop walk not the fastest either. I'm wondering if I will notice an increase in speed with the ul-1/esc swap?

What speeds are you getting now with that prop?

[brad65]

no clue I'm using my eye. I'm guess 35ish. I don't have a gps unit yet. All I know is I'm a hair faster than my buddies nitro sv and he's using a 42cf but his sings and its lighter in weight. Us lipos guys are using large dia props since we don't have the higher volts as the nimh batterys. It would be sick to run 5s on this motor

[Leskimo85]

no clue I'm using my eye. I'm guess 35ish. I don't have a gps unit yet. All I know is I'm a hair faster than my buddies nitro sv and he's using a 42cf but his sings and its lighter in weight. Us lipos guys are using large dia props since we don't have the higher volts as the nimh batterys. It would be sick to run 5s on this motor

Haha Yes it would! 5S would be pretty insane. Well before I did the swap I was getting 36 with the lipo batteries. So changing out the motor and esc gave me an extra 5mph using the same octura 646.
The main reason I switched was the stock sv27 esc doesn't have a Low voltage cutoff. And I didn't wanna risk ruining my lipo's.

[brad65]

wow 5mph is a lot. That would be sick, I'll swap tonight and try tommorrow.

[Leskimo85]

Right on! Yea I was really happy with the results with the UL-1 motor/esc. I wanna get a octura M445 prop and try that.

I'm going out tonight to run it again and hopefully get more video. The water should be calmer today!

[brad65]

It's swapped over, wasn't to bad I'm gonna try the grimracer 42x55mm 2 blade tommorrow. Hope she does well

[Leskimo85]

Thats a big prop, have you run a full battery through her racing, not just stop and wait and go?

Well brad you were right. Took the boat out today. Calm water speed was 45mph. 4mph gain. Ran it for a little loner. The boat stopped out in the lake. Thought the batteries were dead. Waited for a bit and brought it in and I had melted the solder off of the ESC. WOW! first time for me. and one of the sides had fused one of the male ends into the female end of the battery. So I'm going to upgrade to bullet connectors and find a different prop. Any suggestions on what would be a good prop?

I tried the prather 220 and speed was 37mph. I want to stay in the 40mph range but want to be able to run through a full charge on the lipo's.