my water sliders and builds

[wataslyd]

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.

i have the batts foward this thing was literly doing back flips ,man the last time it fliped on me i had to go to some stange people house trying to convence them that the controler aint a gun and that i need to go in there bak yard to retrieve my fliped over boat,man i had to fix that problem quick ,the strut angle was upward ,i made it straight with the hull like traxas said to do and now its planing lovely...sorry brother

[Rumdog]

Sorry what? I'm talking about an inline strut/rudder. I guess you don't really need any advice. Have fun.

[wataslyd]

^^^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.

ok but the rudder is still on the side of the prop it isnt behind the prop its just a bit closer to the prop i was just asking about the pros and cons ,because i was courious ,id still like to test the theory ,twin set up is balanced by counter rotation ,and if the rudder is behind or aside the prop, it will behave the same in sideways motion theory if it wernt there then you wont beable to turn nor go straight like the fin on a surf board ,i dont know maby

[LarrysDrifter]

Guess the keys are still clickin!

[wataslyd]

Sorry what? I'm talking about an inline strut/rudder. I guess you don't really need any advice. Have fun.

what do you mean ??i wasnt being rude,

[keithbradley]

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

My post was in regard to this^^^

If you are just moving the rudder closer to the prop, the only disadvantage is that you will be limited in prop size options, as the prop will start hitting the rudder when you turn.

[wataslyd]

see


i asked before i go and make things worse for myself ,

[wataslyd]

My post was in regard to this^^^

If you are just moving the rudder closer to the prop, the only disadvantage is that you will be limited in prop size options, as the prop will start hitting the rudder when you turn.

yea i saw that ,when i worked the rudder but prop size?? bigger ?? im not sure im going to do ,i was looking at some thined and balanced props,that might give it some sponk ,im not trying to be a mr knoit all ,i appreciate all the advice dont think for onece its going to a blind mind ,im soakin this up guys ,thank you

[sundog]

Saying the prop wash hitting the rudder slows the boat down reminds me of a cartoon of a sailboat - its sails inflated by fan sitting on the deck. Does it move forward?, or will it move forward faster with the fan facing rearwards! I can understand an offset rudder countering a tendency to prop walk, but an inline 'slowing the boat' down just doesn't make sense to me. After doing a search on inline vs offset, it appears the jury is still out on this. I'm still convinced an inline is faster, steering factors notwithstanding.

[Rumdog]

how, please.. could it in any way be faster?

[sundog]

how, please.. could it in any way be faster?

A rudder (even a sharpened rudder) creates a lot of drag cutting through standing water. You can see how much by taping a rudder onto a stick and poke it into fast water - like a water hose or while in a fast boat on a lake. Aerated water (propwash, whitewater, etc.) is easier for a rudder to cut through than standing water (less drag). Aerated water won't support as much weight (not as heavy)and salt water is heavy and supports more weight. Science 101 (I couldn't resist).

[Rumdog]

I know this. but you're still bocking your thrust with the rudder, and disturbing the thrust cone. That's less effective thrust. And, erratic handling. The fact that it has a lot of drag and surface area is the reason that throwing your boats propulsion at it will slow it down.
Guess how a jetboat goes into neutral.... It loweres a cupped cover into the path of the thrust to neutralize it.

[wataslyd]

I know this. but you're still bocking your thrust with the rudder, and disturbing the thrust cone. That's less effective thrust. And, erratic handling. The fact that it has a lot of drag and surface area is the reason that throwing your boats propulsion at it will slow it down.
Guess how a jetboat goes into neutral.... It loweres a cupped cover into the path of the thrust to neutralize it.

ok now this is getting crazy sundog ,,you make more since ,,to me that dosent mean the theory is correct ,rum dog this is common sence ,how i see it even if you put the rudder in any spot its going to create some sort of drag if your theory is correct noow if you block the propulsion path of coarse its going to neutralize ,in a rudder prop sinario the thrust will go around like current passing a pilon now airated water prop wash is about 75% air, now think of wind resistence ,and drafting ,lets say were raceing cars if i was in second place id beable to accelarate quicker than you if you were in first place and i was directly behind you,but if my car was a lane or two on your side then no way cause im hitting undisturbed air ,you driveing in undisturbed air wich creates force now no matter how aeriodynamic a vehicle is standing wind and water ,are forces that needs respect ,now if a rudder is thined and smoothed it creates less resistance and a prop is a puller and a pusher it pulls in so it can push out ,but its pullin undisturbed water ,so this is how i seen it but now idk ,i build and race r/c cars ,i dont put myself out there ,i dont need reconition ,i doit for the thrill ,im trying to build a manual three speed (from radio)with reverse on a ofna ultra gt pro ,almost got it done ,im a michanic ,i do for a liveing ,i love putting pieces together ,making something out of nothing,,, i do best ,fabicater ,im on call if needed,this is in my blood,ive turned women away to go work on a build ,wether a plastic model ,1:1 car,or r/c and i try to obtain all the knowlage i can when i start something ,parts availability ,im trying to build a lath so i need not to worry about that ,im saying all this not to be a jerk but simply introdeuce me ,knowlage is key ,so being a race nut too ,lets try this ,build two identicle hulls built with the same goodies ,but one will be side prop and the other well you know ,wuts up whos game

[Rumdog]

Hundreds of people have modded the stock Ms.Geico from a inline setup to an offset rudder for a reason. Im not missing anything here. I've owned and built boats with inline setups and offset. Needless to say, for me much more have been offset for a reason as well. Inline is mostly used for convienience. Single drive cats with minimal transom surface use them mostly. Start a new thread. Or just do a forum search.

Also, you're rudder, especially with an inline setup will rarely be perfectly straight. You'll need some rudder trim to help it go straight.

[wataslyd]

Hundreds of people have modded the stock Ms.Geico from a inline setup to an offset rudder for a reason. Im not missing anything here. I've owned and built boats with inline setups and offset. Needless to say, for me much more have been offset for a reason as well. Inline is mostly used for convienience. Single drive cats with minimal transom surface use them mostly. Start a new thread. Or just do a forum search.

i didnt agree or disagree mind you i asked the pros n cons ,you still havent explained why ,when to me common sence leans tworad one way ,and you know we all have been wrong b4 ,im not saying im right ,im just trying to understand ,its diffrent i agree ,but like i said ,i try to learn everything ,all the knowlage i can ,knowlage is key