Rudder cooling inlet wrong side?

[Varooom]

Hello All,

I am building a TFL 36 inch mono, my first build. My other boat is a Revolt.

The Revolt has the water pickup on the right side of the rudder, works really well when turning right, or going straight, which is what we do most of the time. Does not work so good when turning left.

The Ariane I am building came with a rudder that has the water hole on the left, close to the prop. I do not understand why they do this. Don't they know we turn right? Do they turn left when racing in China?

So I was looking for a duel inlet rudder because the pond water gets warm here in Florida in the summer and I wanted to run separate cooling for motor and ESC. The only rudder I can find to fit has the duel inlets on the left side.

Does prop wash help push water in the left side inlet or do I need to keep looking and find a duel inlet rudder that fits with right side inlets?

The other option is to put a water pickup in the bottom of the hull, flush mount or get a brass tube of the back of the transom. If I used the flush mount I assume it would have to be back as far as possible and slightly right of keel. I do not like the brass tube because of drag.

Please advise, thank you for your time,

Varooom

BTW: Shouldn't someone tell TFL we need the inlets on the right? What are they thinking?

[tlandauer]

I personally do not feel that it will make that much of a difference: I have Speed Master rudder that has dual pickups on the left.DSCN2972_2432.jpg
I cut the rudder shorter of course.

[iop65]

So you think that the reason the cooling on a revolt isn't working well turning left is because the hole in the rudder is on the right side???

[Varooom]

So you think that the reason the cooling on a revolt isn't working well turning left is because the hole in the rudder is on the right side???

Yes I do. It even explains in the instructions with the Revolt to avoid turning left because there is no or little water flow.

tlandauer,thanks for the vid and info.

[NativePaul]

I have noticed that with a lot of rudders. In China they run to Naviga rules, which is clockwise (right turns) for surface drive boats, so there doesn't seem to be a reason for it.

[iop65]

sharp turning left: the hull tilts in such a way that the hole in the rudder isn't deep enough in the water

but your boat on a table ,hardware over the end of the table, lie the hull on the left side and look where that hole is now

[tlandauer]

Yes I do. It even explains in the instructions with the Revolt to avoid turning left because there is no or little water flow.

tlandauer,thanks for the vid and info.

Reason for my vid is to show the depth of the dual pickup holes on the Speed master is deep enough that banking to the right did not present a problem.
I didn't know AquaCraft had that printed in their manual, interesting. Is that the same rudder they put on the UL-1? Mounting position on that Hyro is on the portside, works great.

[785boats]

Don't sweat it Varooom.
The pickups work fine. I have many rudders with the pickups on the left. Speed Master hydro rudders have them on the left & the rudder is mounted on the left of the prop too. So prop wash has nothing to do with it.

I also have the Ariane 2 with the original rudder & it works fine.

[Varooom]

Thanks 785boats,
That is great news. In the next week or so it will be on its maiden voiage.
I will monitor temps.
thanks again
varooom

[785boats]

No worries pal.
What are you using for motor, ESC & prop?

[tlandauer]

Reason for my vid is to show the depth of the dual pickup holes on the Speed master is deep enough that banking to the right did not present a problem.
I didn't know AquaCraft had that printed in their manual, interesting. Is that the same rudder they put on the UL-1? Mounting position on that Hydro is on the portside, works great.

Sorry Varooom, been staying up too late last night working on my boat, what else?! , really didn't know what I was writing. haha, of course it is a different rudder, and you are probably not using Speed Master.
Anyway, look forward to seeing more of your build, looks great!
Cheers!
going to take a nap before wasting more of other people's time.

[Varooom]

Thanks guys,
785boats, its getting a neu 1527 1.5d, castle hydra 240 on 6s2p. Will start with a x450 prop.
I hope I do not make magic smoke:)

Varooom

[phil t]

You can use a drill or a small round file and make the water pickup groove come out closer to the leading edge of the rudder, that will improve water flow when turning left.