Offshoreonly.com

Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   General Boating Discussion (https://www.offshoreonly.com/forums/general-boating-discussion-51/)
-   -   Anyone running a hydrofoil on a stepped hull? (https://www.offshoreonly.com/forums/general-boating-discussion/375207-anyone-running-hydrofoil-stepped-hull.html)

SB 03-30-2022 06:46 PM

:lolhit::nicethread::evilb:

Prestigeworldwideee 03-30-2022 08:29 PM


Originally Posted by SecondWind (Post 4826802)
https://www.powerboatlistings.com/view/49850#

Here's a link to a 1990 Senza. Looks like an aggressive step for a 1990 25 foot powerboat. Maybe that's just a handling characteristic of this particular hull. I'd be careful throwing money at it without talking to someone who successfully fixed the issue on the same boat.

Yeah, it’s fairly aggressive… and you don’t really ever see that. From what I’ve seen, a lot of big off shore boats have them but they have multiple gradual steps . You have to be careful driving, it can be dangerous. I always have to let off the throttle very easy and a 180 isn’t all that hard to do.

phragle 03-30-2022 08:35 PM


Originally Posted by Prestigeworldwideee (Post 4826966)
If you guys don’t have or have never had a stepped hull, I’d appreciate it if you just like the guys with stepped hulls talk.

Not mine but it’s the same hull, rides on a pocket of air… do you see why I’ve said that trim tabs won’t work besides the fact that I talked to owners that said they didn’t help


Its not a cat, it does not ride on a pocket of air, it rides on aerated water. Go to a poker run or a race and look at the boats, It doesnt mayter if it has one step or an outerlimits with 27 steps, they will all have tabs. That said your boat, steps or no steps is a single correct? singles are susceptible to torque which can cause them to lean. a twin has counter rotating props that counteract the lean. On a single slightly dragging a tab can help considerably. You need to take the time to learn the hydrodynamics of a stepped hull as there are some things about them that can get you in trouble really quick. You are correct in that they handle different than nonstepped hulls but you need to go a step further as to how.

resurrected 03-31-2022 06:22 AM

It is a very aggressive step, and it looks like a much steeper dead rise ahead of the step than behind it.
In my opinion (and I have a single step boat, so I am permitted to engage in this discussion), you should start with easy stuff like trying to move the center of mass farther back (even 50lbs worth of cooler from the front to the back will make a noticeable difference) does trimming it up lift the bow enough, and talk to Brett regarding props to achieve less stern lift. It sounds like you have two different things occurring, correct me if I am wrong: one being bow steer and the other listing over to one running surface? Trim tabs will help with the listing over, the bow steer looks like a design flaw in relation to your current set up (prop characteristics and balance)

TeamSaris 03-31-2022 11:20 AM

Did posts get deleted off this thread? I remember commenting....I remember Rob (offshoredrillin) commenting. Neither are here. Didn't like what we had to say? What's this facebook now? lol

F-2 Speedy 03-31-2022 11:36 AM


Originally Posted by TeamSaris (Post 4827064)
Did posts get deleted off this thread? I remember commenting....I remember Rob (offshoredrillin) commenting. Neither are here. Didn't like what we had to say? What's this facebook now? lol

I see your post, you said gimble ring ? posts 14 & 16

cheech 03-31-2022 11:45 AM


Originally Posted by TeamSaris (Post 4827064)
Did posts get deleted off this thread? I remember commenting....I remember Rob (offshoredrillin) commenting. Neither are here. Didn't like what we had to say? What's this facebook now? lol

This site is wonky today. Another thread I looked at was missing a lot also.

cheech 03-31-2022 11:47 AM


Originally Posted by Prestigeworldwideee (Post 4826966)
If you guys don’t have or have never had a stepped hull, I’d appreciate it if you just let the guys with stepped hulls talk.
https://cimg0.ibsrv.net/gimg/www.off...7d226752a.jpeg
Not mine but it’s the same hull, rides on a pocket of air… do you see why I’ve said that trim tabs won’t work besides the fact that I talked to owners that said they didn’t help

Oh I see now.
Sure does ride on air.

SB 03-31-2022 12:03 PM


Originally Posted by TeamSaris (Post 4827064)
Did posts get deleted off this thread? I remember commenting....I remember Rob (offshoredrillin) commenting. Neither are here. Didn't like what we had to say? What's this facebook now? lol

yup, me too. One of mine seems to have disappeared, But then again, the op has another thread from last year on speed buying the boat and having speed issues. Discovered the trim button and found 7mph.

Maybe we posted there within last few days and thought we posted here ?

cheech 03-31-2022 12:06 PM


Originally Posted by SB (Post 4826968)
:lolhit::nicethread::evilb:

Yep as usual, wasting everyone's time.
On here, he has no clue as to his own boat. :hitfan:
Then he gets hostile and we're the idiots.
FWIW, by chance when I was Googling Senza Spectre pics, I came across an Iboat thread by the same guy from 2018 fighting the same issue, here.

Apparently he has no clue or he needs someone that does to get the boat squared away if there is an issue at all.

( I have a stepped hull but it has more than one, so am I allowed to talk?) :popcorn:

SB 03-31-2022 12:09 PM

Okay, here is thread i was talking aboute. Here on oso, but we didn’t reply there recently:
https://www.offshoreonly.com/forums/...-my-speed.html

hmmmm

SB 03-31-2022 12:13 PM


Originally Posted by cheech (Post 4827070)
This site is wonky today. Another thread I looked at was missing a lot also.

Okay thanks. My post seems to be back also. :thumbs

Prestigeworldwideee 03-31-2022 12:34 PM


Originally Posted by cheech (Post 4827073)
Yep as usual, wasting everyone's time.
On here, he has no clue as to his own boat. :hitfan:
Then he gets hostile and we're the idiots.
FWIW, by chance when I was Googling Senza Spectre pics, I came across an Iboat thread by the same guy from 2018 fighting the same issue, here.

Apparently he has no clue or he needs someone that does to get the boat squared away if there is an issue at all.

( I have a stepped hull but it has more than one, so am I allowed to talk?) :popcorn:

I’m really happy for you that you found a 4 year old thread. Actually you’re not lol, I don’t know how you can compare 2 steps to 1 step. Your boat is probably 1.5 longer with twins, the dynamics aren’t the same. You must be a really sensitive young man if you think I’m hostile. I really don’t feel like fielding your questions, all I want is someone with a hydrofoil and a single step, preferably a Senza Spectre owner to chime in.

Prestigeworldwideee 03-31-2022 12:48 PM


Originally Posted by phragle (Post 4826984)
Its not a cat, it does not ride on a pocket of air, it rides on aerated water. Go to a poker run or a race and look at the boats, It doesnt mayter if it has one step or an outerlimits with 27 steps, they will all have tabs. That said your boat, steps or no steps is a single correct? singles are susceptible to torque which can cause them to lean. a twin has counter rotating props that counteract the lean. On a single slightly dragging a tab can help considerably. You need to take the time to learn the hydrodynamics of a stepped hull as there are some things about them that can get you in trouble really quick. You are correct in that they handle different than nonstepped hulls but you need to go a step further as to how.

yeah, specifically it’s aerated water but there’s porosity to that, it completely changes how it reacts to anything around it, it might as well be a pocket of air and yes, I know it’s physically impossible. I’m aware of the prop torque, that’s why I also put my battery on the drivers side to help with that. But I’m not here to prove how much I know, I have zero interest in that, just want the boat to handle better. I think this has been an issue for the other guys that owned this boat. On the back left of the transom, it looks like someone installed a single trim tab and it got removed at one point. It’s also the stock quicksilver 3 blade prop, wouldn’t a 4 blade be way worse?? The entire boat is setup from stock.

resurrected 03-31-2022 12:56 PM

The hydrodynamics of one step vs two steps is essentially the same, it just reduces the planing speed to notice the effectiveness of a step design.

techman 03-31-2022 01:06 PM


On the back left of the transom, it looks like someone installed a single trim tab and it got removed at one point.
A single trim tab? That's a first for me.

Maybe try a drive with a counter rotating prop like a B3. Will help with torque steer and provide a little more lift.

offshoredrillin 03-31-2022 01:19 PM

I think the problem is you have a crappy designed boat and the owner is just as stupid... in boating terms you're whats known as an askhole, you ask questions and keep changing the question till you get an answer you want... so einstein, good luck w your tub, hope you dont kill anyone... let us know if you decide to go to any runs, so we know to look out for the ill handling POS, with the know it all behind the wheel.

SB 03-31-2022 01:27 PM

:lolhit::poopoo::bunnydance:

resurrected 03-31-2022 01:58 PM

May have found the actual problem

scarabman 03-31-2022 02:08 PM


Originally Posted by offshoredrillin (Post 4827082)
I think the problem is you have a crappy designed boat and the owner is just as stupid... in boating terms you're whats known as an askhole, you ask questions and keep changing the question till you get an answer you want... so einstein, good luck w your tub, hope you dont kill anyone... let us know if you decide to go to any runs, so we know to look out for the ill handling POS, with the know it all behind the wheel.

It is so hard to tell how you really feel at times! Why cant you just make your thoughts more clear?:angry-smiley-038: :lolhit:

offshoredrillin 03-31-2022 02:12 PM


Originally Posted by scarabman (Post 4827094)
It is so hard to tell how you really feel at times! Why cant you just make your thoughts more clear?:angry-smiley-038: :lolhit:

:drink: very knowledgeable people have given him the answers and places to look, all he says is no thats not it... he is darrific..

techman 03-31-2022 02:23 PM

April 1st is tomorrow......just sayin.....

Prestigeworldwideee 03-31-2022 03:28 PM


Originally Posted by cheech (Post 4827070)
This site is wonky today. Another thread I looked at was missing a lot also.

I don’t want your help, why don’t you just go away? Nothing better to do?

Prestigeworldwideee 03-31-2022 03:31 PM


Originally Posted by offshoredrillin (Post 4827095)
:drink: very knowledgeable people have given him the answers and places to look, all he says is no thats not it... he is darrific..

Given me what answers? I never asked anything other than if people were running hydrofoils with step hulls. That’s it, if you guys want to talk about something else, I won’t stop you from making a thread

Prestigeworldwideee 03-31-2022 03:33 PM


Originally Posted by TeamSaris (Post 4827064)
Did posts get deleted off this thread? I remember commenting....I remember Rob (offshoredrillin) commenting. Neither are here. Didn't like what we had to say? What's this facebook now? lol

This is the most glitchy forum I’ve ever been on, it’s gotten worse in the past year.

IGetWet 03-31-2022 04:15 PM

I believe, that it’s possible, that Dar, or a disciple of dar, has been lying in wait since 2018 for the perfect opportunity to try to strike stupidity into us all. Many of us are very vulnerable this time of year.

Consider the evidence: He/she knows their boat rides on air, but doesn’t know the difference between plastic fins that bolt onto a cavitation plate, and a hydrofoil. He/she can regulate who comments on their thread, but doesn’t even know what prop is on their boat. He/she claims there’s evidence of a SINGLE trim tab being mounted on their v hull, but doesn’t even know what a trim tab does...

phragle 03-31-2022 06:03 PM


Originally Posted by offshoredrillin (Post 4827082)
I think the problem is you have a crappy designed boat and the owner is just as stupid... in boating terms you're whats known as an askhole, you ask questions and keep changing the question till you get an answer you want... so einstein, good luck w your tub, hope you dont kill anyone... let us know if you decide to go to any runs, so we know to look out for the ill handling POS, with the know it all behind the wheel.


While I do agree with you.... this might help your day ..lol

https://cimg0.ibsrv.net/gimg/www.off...650efe90c1.jpg

Prestigeworldwideee 03-31-2022 06:18 PM


Originally Posted by phragle (Post 4827139)
While I do agree with you.... this might help your day ..lol

https://cimg0.ibsrv.net/gimg/www.off...650efe90c1.jpg

I hope there are midols in those snickers 🤣… the only danger we’re in is that Red Sea tidal wave.

SB 03-31-2022 06:31 PM

Oh hell, i’m jumpin in….
Step bottom with hydrafoil


https://cimg9.ibsrv.net/gimg/www.off...a773a8d36.jpeg



phragle 03-31-2022 06:52 PM


Originally Posted by Prestigeworldwideee (Post 4827142)
I hope there are midols in those snickers 🤣… the only danger we’re in is that Red Sea tidal wave.


If you knew a 1/40000 of what Rob knows about boats, you wouldnt be asking these questions..... Be carefull you dont go over the edge while you boat on the flat earth.

Prestigeworldwideee 03-31-2022 07:05 PM


Originally Posted by phragle (Post 4827147)
If you knew a 1/40000 of what Rob knows about boats, you wouldnt be asking these questions..... Be carefull you dont go over the edge while you boat on the flat earth.

if you love Rob so much, why don’t you marry him? I’ll try to be “careful”, since that’s how you spell that word. 😘

Indy 03-31-2022 07:13 PM


Originally Posted by IGetWet (Post 4827120)
I believe, that it’s possible, that Dar, or a disciple of dar,

OMG, disciples of Darr, never thought of that possibility, we're doomed. If it went global it could be the end of the world as we know it. :crazy:

offshoredrillin 03-31-2022 07:43 PM

i knew it, he is Race Bannon! good evening Dr. Quest!
https://cimg4.ibsrv.net/gimg/www.off...7677695638.jpg


Prestigeworldwideee 03-31-2022 08:01 PM


Originally Posted by offshoredrillin (Post 4827158)
i knew it, he is Race Bannon! good evening Dr. Quest!
https://cimg4.ibsrv.net/gimg/www.off...7677695638.jpg

I like a bigger boat than that, it’s kinda small but at least I’ll be able to take your mother out in it.

SB 03-31-2022 08:10 PM

The thread that keeps giving. :lolhit:
Thanks for the miles of smiles everyone.
Almost here….just 2-3 months and boating season.

Wildman_grafix 03-31-2022 08:36 PM

I like it and want one!




Originally Posted by offshoredrillin (Post 4827158)
i knew it, he is Race Bannon! good evening Dr. Quest!
https://cimg4.ibsrv.net/gimg/www.off...7677695638.jpg


offshoredrillin 04-01-2022 06:06 AM


Originally Posted by Prestigeworldwideee (Post 4827159)
I like a bigger boat than that, it’s kinda small but at least I’ll be able to take your mother out in it.

well, if you want to ride around with a coffin in your ill handling tub that's on you.:grinser010: jonnys boat is bigger than yours, and it ran so good they beat the bad guys too... yours cant do that, it has a problem with steering

resurrected 04-01-2022 06:26 AM

I normally don't participate in negative input, but in this case I am willing to make an exception.
At the beginning I genuinely believed the OP was looking for help with his poorly designed and set up boat. I was incorrect with that assumption, he just wanted validation with his preexisting plan to install an oversized cavitation plate (not a Hydrofoil, as indicated by the title). Thank you SB for the example of a hydrofoil!
I say go cat go! Install the Doel-fin or whatever brand you have already purchased, and when it creates so much stern lift, you spin out, and from the extra load on the cav plate it breaks the mounting points clean from the drive.

Please don't have anyone else with you at the time of your test run.

I am honored to have participated in a dialogue with a future Darwin Award recipient.

Brad Christy 04-01-2022 07:04 AM

https://upload.wikimedia.org/wikiped...ect_01.svg.png

sutphen 30 04-01-2022 07:49 AM


Originally Posted by resurrected (Post 4827188)
I normally don't participate in negative input, but in this case I am willing to make an exception.
At the beginning I genuinely believed the OP was looking for help with his poorly designed and set up boat. I was incorrect with that assumption, he just wanted validation with his preexisting plan to install an oversized cavitation plate (not a Hydrofoil, as indicated by the title). Thank you SB for the example of a hydrofoil!
I say go cat go! Install the Doel-fin or whatever brand you have already purchased, and when it creates so much stern lift, you spin out, and from the extra load on the cav plate it breaks the mounting points clean from the drive.

Please don't have anyone else with you at the time of your test run.

I am honored to have participated in a dialogue with a future Darwin Award recipient.

you forgot,,put a gopro on board,,we need a good laugh.


All times are GMT -5. The time now is 06:33 AM.


Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.