Prop and rudder placement question.

[erikstarcher]

Hi, I am hoping you guys can help shed light on a question I have about prop and rudder placements.
I have been playing around with electric boats and they mostly have offset rudders placed behind the front of the prop.

I am now working on converting over a couple of big gas boats to electric. 52" Enforcer and 55" Scarab.


The Enforcer comes with 2 rudders mounted in front of the prop.


The rudders and strut that came with the Dumas are the same way, but the prop and rudders are much closer to the transom.
(Bought it used from someone who was going to convert it but never got around to it)



Are these setups going to work right?
Is there a reason the gas boats have the prop out back unlike all the electrics I have?

Thanks for any info/help you guys can provide.


Erik

 

[Grimracer]

Most of the FE RTRs you have, those designers have ZERO idea on what a typical distance is.. 10% of the boat length is my go-to rule of thumb.

Grim

 

[erikstarcher]

Most of the FE RTRs you have, those designers have ZERO idea on what a typical distance is.. 10% of the boat length is my go-to rule of thumb.

Grim

Strange that you should say that because most of the FE RTR's that I have are spaced about 10% of the hull length and the gas boat's prop is also about 10% (5 inches) but the rudders are in front of the prop at about 4 inches. Are you saying that Enforcer's designers are in the wrong here and the rudders should be further back as I first mentioned?

 

[Grimracer]

well then.. if they are at 10% then your good to go. Make the setback of the other boat anything you want!

Grim