Mono Rudder angle and Strut adjustment question

[Bking1340]

Good day all

Have done a bit of reading on mono hull attitudes and struggling to understand what rudder angle are doing in a turn - that specific brain cell do not want to cooperate. I have read about angled rearward or forward, but which is which in the picture attached and what will picture 1 do in a turn and what will picture 2 do in a turn?

The second brain cell that failed is strut adjustment and battery placement. If I raise the strut (Prop moved up or skywards - correct me if I`m wrong), the bow of the hull will run lighter in the water. If I drop the strut (Prop moved down to the water), the bow or nose will also move down and the boat will run wet.
BUT I can also move my lipo`s to the front to run wet or to the rear to lift the bow out of the water.
So why do I need to change strut angle, if I can just move my lipo`s around? What`s the difference?

Thanks

[Fluid]

When adjusting the rudder, it is the angle of the hinge pin which really matters, not just the blade. Angle the hinge so the bottom of the rudder is closer to the transom and the bow is raised; angle the hinge so the rudder bottom moves away from the transom drives the bow down.

On most monos, raising the strut (without changing the angle) will settle the hull in the water, making it run wetter. Sometimes this is desired, since some deepvee hulls will chine walk if run too high out of the water. Lowering the strut will raise the hull out of the water, increasing speed but often decreasing stabililty.

Changing the strut's angle will raise or lower the bow. Move the prop end up and the bow will rise - and vice versa.

The CG needs to be adjusted so that when the hull leaves the water it returns flat. With the CG too far back the boat will flip over on its back; to far forward and it will nose dive into the water. Some folks adjust the ride attitude with the CG and this is okay, as long as the hull "flys" flat. It is better to use strut adjustments for most attitude changes and fine tune with CG. IME anyway.




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[Bking1340]

Do you know what - I did not even know that the strut(prop) can move up and down and the angle can be changed - just thought that strut adjustment only change angle.

By the way, I`m going for my Revolt maiden tomorrow, so just want to know what to expect with what changes. I only had a bit of experience on a thunder tiger bandit nitro tunnel hull and a 900mm size osprey hull which I did not tried any tuning on - got stolen about 1 1/2 years ago.

Thanks

[madmikepags]

With most stingers you can only adjust the angle of the prop, you would have to raise the whole stinger, Take it off drill new holes and change the hole of the stuffing tube, it's more desirable to have a strut that can adjust up and down without changing the prop angle but you need a wet well so there's room to move the strut and the stuffing tube. When you angle the rudder back the nose of the boat will come up and the opposite happens when angled in (this is in a straight line). This is not really a good way to tune a boat though, the rudder should be straight up and down tune ride attitude with trim tabs and CG. basically I'm reiterating what Fluid said
That all being said you're running a revolt which is a pretty good running boat right out of the box and the strut shouldn't have to be moved up or down, and the rudder should be straight, small adjustments of the stinger and trim tabs should get you're boat running well.