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srislash
06-22-2018, 08:40 AM
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/showthread.php?50559-Renewed-1-10-Miss-Cadillac-Shovel&highlight=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
06-22-2018, 03:47 PM
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
06-22-2018, 07:24 PM
Thanks Jim, I’ll check on this when home in an hour or so.

It is light, at least by my standards
srislash
06-22-2018, 08:46 PM
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
06-22-2018, 08:55 PM
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.


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srislash
06-22-2018, 09:13 PM
160013

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
06-22-2018, 10:07 PM
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
06-22-2018, 11:34 PM
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