Old Shovel issues

[srislash]

To the scale guys, what dang prop do you run on these?

I have been working my way thru my smaller props on this boat https://forums.offshoreelectrics.com...=Miss+Cadillac

Last prop was a cut up 440(37mm) with a bunch of mod work.
It was good till about 2/3-3/4 throttle then it tosses the back end up.
Next and last prop I have is a 438 cut to 35mm and detounged.

I am not expecting a go fast boat as we are trying to run at the city park.
Thanks, Shawn

[JimClark]

Well with the proboat 1500kv motor a X447 work well I have never run the motor you have but I am thinking maybe a 42 or 45? I looked at your other thread can you tell me how deep the sponsons are and how deep your prop is? Also what does this boat weigh RTR?

[srislash]

Thanks Jim, I’ll check on this when home in an hour or so.

It is light, at least by my standards

[srislash]

Well with the proboat 1500kv motor a X447 work well I have never run the motor you have but I am thinking maybe a 42 or 45? I looked at your other thread can you tell me how deep the sponsons are and how deep your prop is? Also what does this boat weigh RTR?

The sponsons are 1 1/4” deep as is the hub of the prop. Well more like 1 1/4” at rear of of hub.
RTR weight is 97 oz with a 4200mah 4s pack.

Pretty sure it is an 1800kv motor

[Fluid]

I’m confused, a UL-1 motor is 2030 Kv not 1800. If the transom is hopping then either the prop has too much lift/down angle/too deep or the CG is too far forward. A Kv of 1800 would work better with an x445.

Beautiful boat BTW.


.


.

[srislash]

EBCE58EC-5346-4370-9CF5-1F3DFB88A3CC.jpg

And it is a gold can AQ motor of 1800 Kv

I know these aren’t supposed to be fast

Damn phone pics, haha. I have RTR CG 2 1/2” behind sponson trail edge.

[JimClark]

CG should be closer to 1 inch behind the sponson's. Those sponsons are a little deep my boats have been more like 1 inch deep and the center of the drive dog also at 1 inch.

[srislash]

CG should be closer to 1 inch behind the sponson's. Those sponsons are a little deep my boats have been more like 1 inch deep and the center of the drive dog also at 1 inch.

Now that I measured the CG I would’ve thought it was a lot closer to the sponson edgebased on the behaviour