feigao vs ammo

[Dale Koblitz]

Why would you do that? It seams you are running it full under I'm guessing to keep her planted. That will slow you down a little but if you cut it down it's not going to be very effective at that anymore. I'm thinking with your tabs way dowm like that and the rudder all the way forward or under you may be slowing her down quite a bit. Maybe you have to though running the right prop with your motor/esc combo. You're probably running quite wet. That along with a butt load of grease might have something to do with your speed or lack of. Will she stay planted if you run her a little dryer running on little ripples, if so I bet it would run much faster with a thin layer of grease. I use grim racer blue speed greese.
Actually it's hard to tell in the first pic it looks like your tabs are bent way down but in the other pics they don't look that bad. Neither of the leading edges of the trim tabs are below the hull are they? When I got mine one of the tabs was way to low I had to boar ovals out of the holes on the tabs so I could move them up so they were above the back hull. That would have of slowed me way down if I hadn't cought it.

[Dale Koblitz]

2 more.....

Was that a nitro SV or did you cut out those air ducts? The onlything I can see that would slow you down is the angle of your trim tabs and the rudder and if you're using to much thick grease. Did you ever recheck the allignment of the stuff tube with the motor coupler, and are your props well ballanced and sharpened? If all these things are fixed or fine you must have had a bad motor or esc? How were your speeds with the stock sv27 gear in it if it ever was a BL27? If things were fine then and you haven't changed anything must be motor or esc?

[chunt92]

i know a few guys running gas boats and the some times shorten the rudder less stering and more speed. no the leading edge is flush the trailing edge is about the thickness of it self. ose trim tabs that i got did have some play enough to get it flush. you said full under u are referin to the rudder?

[chunt92]

i cut them out. for cooling the batts. when it was stock they got very hot. but they were 2100 venom 2 cells lipos. i didnt relise till to late that it pulls a lot of amps.

[Dale Koblitz]

I bet that makes it a little trickey to tape her up for water proofing!
And yes I meant the rudder. By running it full under your pushing the rear of the hull down which causes more drag.

[chunt92]

nothing gets wet. knock on wood i havent recked, yet lol.

[chunt92]

so the rudder should be parallel with the transom? i never moved any of that its the way it came out of the box. tilted back would rase the front of the boat? and increase speed?

[Dale Koblitz]

No, tilting it back would raise the transom and prevent the boat from plowing water. But you would brobably just whant it parallel to the transome like you said to decrease drag.

[chunt92]

cool thanks, got to get this thing back in the water speedo is on its way

[Ctonez]

re: the pics
your tabs are pretty far down. I haven't looked at the vids yet...does it ride wet or loose? I suspect it rides fairly wet. Those tabs are slowing you down.
I still believe your water pickup is too low. easily worth a couple mph in increased drag.
In the final pic...looking dead on from the rear...it still looks like your rudder bracket is not totally square. ..could be the angle of the pic, but try and twist it (don't force it! ) and see if those bolts might be a little loose. Mine works loose after several runs or contact with underwater debris/other boats.

re: the holes in the hatch lid...nitro/gas guys can run open top, but it is not wise to run open top with an Electric. minimal wetness is tolerable, but bone dry is best...soaking your lipos and electronics is BAD.
...and you WILL wreck. especially the way you are pursuing speed...I'm really surprised you haven't wrecked yet to be honest.
...so is that a Nitro hull, or hatch, or just custom?
There are several threads in this forum and other forums that detail several good ideas to enhance the performance and longevity of the SV27. It may take awhile to read through, but I advise all new SV27 owners search for and read through those threads and take notes...it'll increase the performance of the boat, the longevity of the components, and the most important factor - FUN!

[Ctonez]

Sorry Dale...I keep reiterating what you write for some reason...

[chunt92]

would it be ok to recut the pic up tube? maybe a little off the bottom? because if i raise it it the opening will be upbove the bottom of the hull or does that not matter? as in the pic of the rear the rudder does look to be little tilted top right bottom left and ill decrease the angle of the trim tabs. straight no neg. & no pos.?

[Ctonez]

would it be ok to recut the pic up tube? maybe a little off the bottom? because if i raise it it the opening will be upbove the bottom of the hull or does that not matter? as in the pic of the rear the rudder does look to be little tilted top right bottom left and ill decrease the angle of the trim tabs. straight no neg. & no pos.?

I don't run a water pickup like that, but you really don't need much exposure to the water surface to pick up plenty for the system. Adjust it so it is barely peeking over the transom.
I would also move it further away from the keel so it doesn't interrupt flow to the prop...this could also contribute to the slow factor.

re: trim tabs...It depends on how your boat is riding currently.
I'd barely tweak them up, then run the boat and see how it affects the handling/ride/speed, then I'd bring the boat in and tweak a tiny bit more and run the boat again...repeat until the boat is too loose and then back them up to where it runs stable but fast.

Keep in mind, the boat will start to fly a bit, and you will likely flip it with the trims too high...have a retrieval method ready and seal that hatch!
How am I doin' Dale?

[chunt92]

(pick up tube)ill try it with out the next time i run it. how do you or did you open the pick up in the rudder didnt you say you opened it up? what size? im debating on sending the motor back. tower hobbies is going to say sorry! and im out the shipping,what do you think. if i dont should i go with another ammo, or should i try one of the feigao's and what size?

[kin]

(pick up tube)ill try it with out the next time i run it. how do you or did you open the pick up in the rudder didnt you say you opened it up? what size? im debating on sending the motor back. tower hobbies is going to say sorry! and im out the shipping,what do you think. if i dont should i go with another ammo, or should i try one of the feigao's and what size?

feigao 9xl , get hydra 120 esc if u dun have em ..... your boat be a rocket , pls do some trimming to stable it too cause this will be a fast boat