UL-1 prop question

[lincpimp]

Hey Guys, need some help from the pros!

I just acquired a UL-1, it has a 6xl in it, and I plan to run 4s lipo. Not looking for a speed demon, 50mph max.

Looking at props, the octura x438 looks to be about right, but I wounder if the Grimracer L38x55 would be a better choice. They appear to be very similar in spec.

I see that the grimracer is listed as a lifting prop, and I thought that was what you had to use on a hydro (this is my first hydro) but I also see that the UL-1 runs the same prop that the supervee does stock, so I am a bit confused...

Please steer me in the right direction, I just put around the local pond, so good temps and runtime beat speed for me!

Thanks!

[hurricane]

Ok with the 6xl and 4cell lipo I would run X632 or X432.
I run both of these in some of my boats just make sure you have good cooling for everything.
I get right around 60mph some times a bit more if the water is smooth and no wind.
test these props out let me know how it works for you.

Mine hooks and fly's love it.

[detox]

WOW...6xl 2779kv motor using 4s lipo has unloaded prop speed of around 39000 rpm +. You better use a small prop or you will burn up ESC.