my water sliders and builds

[wataslyd]

hi my name is chris and my very first boat was a traxxas villian and i put two aqua craft outboards on it ........ it suked ,well my next boat is a spartan ...i read in a thread here that the spartan suks too ,in so many words ,well i love mine it had some issues with it out the box but its awsome now,i have a tunel comeing friday "cross my fingers" and its BRUSHLESS power ,and i have some learning to do,i have no clue on how to tune a boat ,and i do have a question if anyone can answer it for me thatll be great,whats the pros and cons of a side rudder versus directly behind the prop ,well i have a few pics and vids of my spartan im a new be so please be kind to my ignorance

this pic i added bearings to the rudder 3mmx8mm flanged 4

first run no tune on lipo sorry realy short vid,but i have more on the same run

yea thats me man i was sceared flying i mean driveing this fliped twice youll see and how lucky i am

thenafter some tweeking
sorry i was by my self this day but here goes


the vids were done on my cell so please dont bash me

[wataslyd]

heres a few more pics or i guess im in the wrong spot to set up a thread ,well 15 views and no comment not even negative ,well when the tunnel comes in its a gas boat that im going to electricfy,all i have is the spartan now so if this isnt the place to set up a base thread let me know

i had a hard time trying to figer out how to get the stearing more acceptible this thing was makin wiiiiiide turns so in this pic i fliped the turn fins to bring them closer to the center

i also fliped the rudder mount to bring it closer to the center
and ran a dual cooling ,im waiting on another water outlet for the speed control side

the batts are 35c 5000 mlh 3s venoms
and i also swaped out the servo saver for a alum longer one to achieve tight turns

[siberianhusky]

Is that the stock spartan cooling setup? Thats messed up! Must kill the handling and ride attitude. Why are they not closer to the center line of the boat where just the lip can drag in the water when the boat is running straight? Those things must dig in horribly when it turns.

[sundog]

In line vs offset rudder

It's been my understanding that an inline rudder is faster than an offset rudder for a couple of reasons. One - it is in frothy water which has a lower drag coefficient than 'undisturbed' water. Another is the rudder acts somewhat like the stator in a jet drive by straightening out the circular motion of the water from the prop, focusing more force to the rear.

An offset rudder, being in undisturbed water will afford quicker steering response, and (I suspect) would have better flow from a water pickup for the same reason. That being said, Oval and Eco racers will benefit more from an offset rudder. Whereas Offshore racers and SAW competitors (where fast steering response is secondary to top speed) would benefit more from the inline system.

[wataslyd]

Is that the stock spartan cooling setup? Thats messed up! Must kill the handling and ride attitude. Why are they not closer to the center line of the boat where just the lip can drag in the water when the boat is running straight? Those things must dig in horribly when it turns.

no its not ,its something i just mocked up so when the ones that i orderd come in ill just let them fall into place and secured,the stock cooling was pretty much from one heat sorce to another ,which i kno isnt cool for second in line ,but if i can find a dual pick up on a rudder,that will work with this or ,a compleet set up , ill do that instead, and im thinking about changeing the set up any way im not too fond of the side ruder ,help is always appreciated by me ,thank you very much im new to this ,my next boat will be a tunel hull ,any hints or warnings ???:)

It's been my understanding that an inline rudder is faster than an offset rudder for a couple of reasons. One - it is in frothy water which has a lower drag coefficient than 'undisturbed' water. Another is the rudder acts somewhat like the stator in a jet drive by straightening out the circular motion of the water from the prop, focusing more force to the rear.

An offset rudder being in undisturbed water will afford better handling characteristics, and I suspect would have better flow from a water pickup for the same reason. Oval and Eco racers would benefit more from an offset rudder. Offshore racers and SAW competitors would benefit more from an inline system.

awsome ,and whats SAW ?? and offshore raceing defines as? i need knowlage :{)

and theory on lets say 55+" hull with some where around 4 depending on with 5 or 6 out boards "example the o.s out board unit with 6s able motors matching speed controls and some serious juice ,id like the two cents ,of folks that have been doing this for centries and decades versus my ,long intheuseasm ,with a dream ,and my real first speed boat driveing now three weeks lol
so the oppenion of vets will deturmine my next money pit lol ,but maybe its not such a great idea,i need to know ,before my ole lady rapes my ear wit foolery ,and a heep of ahhh haaaaa's ,

[sundog]

awsome ,and whats SAW ?? and offshore raceing defines as? i need knowlage :{)

Refresh and read my post again - I've edited it for clarity. SAW is an acronym for Straight A Way - a (one person at a time) 'drag race' for top speed. In (full size) Offshore racing there is a lot more water to cover, so the turns are not necessarily as 'abrupt' as Oval racing.

[wataslyd]

i understood that sorry ,and thank you very much ,question who makes a light weight 55+ mono ,or cat
i wanna build something like this



they have some that are all black ,with six outboards ,these were badd bak in the day

[wataslyd]

hey everybody

[Rumdog]

Inline sucks. It slows the boat down, and it turns worse.
On the spartan, ditch those water pickups in the trim tabs, and flip that rudder bracket back around. it'll turn MUCH better.

[sundog]

Inline sucks. It slows the boat down

Interesting. Rummy, is this something you've experienced? (rudder both ways on the same boat with the same setup). Why would it slow the boat down?

[wataslyd]

the trim tabbs are gettin changed the rudder is still aside the prop and it turns way beter this way check the vid ,i believe the last vid ,it actualy turns quick ,before it would turn wide ,and lo speed forget it ,i appreciate the sujestion but ,not on rudder pos sorry ,where can i get a dual inlet rudder ,i havent found one yet ,please ,thanks a bunch

[Rumdog]

you're shooting water at the rudder. It is attached to the boat. force in the opposite direction you're trying to move. Especially in turns. It is also causing the boat to nose in more.

[Rumdog]

lol. OK.

[keithbradley]

^^^This guy knows^^^

Also, having the rudder next to the prop helps minimize the effect of the prop trying to push the boat sideways. In twin setups we use counter rotating props but in singles the offset rudder helps.

[sundog]

I wonder what rudder arrangement most SAW record holders use? I do see your point, water being directed at the rudder is a force pushing backwards (boat connected to the rudder slows down). Anyone here ever proved this theory, one way or the other?