Wings??

DES

Cadet
Joined
Nov 12, 2004
Messages
15
Re: Wings??

Few understand the smart-tabs until they have tried them, John....I can lift my bow just fine, even with mobster tabs....
 

boatster

Petty Officer 1st Class
Joined
Jun 13, 2004
Messages
331
Re: Wings??

I haven't tinkered around with my Smart Tabs enough to say much about how they handle in a following sea. But I can say what I've tested so far has made me a very satisfied user of the product. So much so I am going to purchase another pair for my other RIB boat. I do think a certain on the fly adjustability would probably make this smart tabs perfect. I don't mean like the Bennets but maybe some kind of multi placement capability for heading seas or following? Just a random though maybe....<br /><br />Oh and I had dolphins on my outboard and they slowed the boat down by a mph or two. I could very easily feel the drag without the improvement in ride or planing at early speeds.
 

BillP

Captain
Joined
Aug 10, 2002
Messages
3,290
Re: Wings??

Kenny, <br />Starting with attacks on peoples experience is way off base. 90% of my experience for the last 15 yrs is running offshore through inlets in small boats with tabs. It isn't rocket science to understand how smarttabs work. It sounds like you can't accept the facts that any and all tabs have limitations...no matter what the brand or how they adjust. Not one of them does "everything" better. Some are safer in certain condtions than others. This reminds me of a few catamaran owners who refuse to acknowledge the traits of multihulls in following seas. "The brouchure didn't tell them about it".<br /><br />Just try to understand the limitations of different tab systems...Bad following seas are run at slower speeds with bow trimmed up. Inlet/following sea running can be stop and wait for smaller waves and then throttle at various speeds to get over or around waves. Tabs that automatically deploy while you are "waiting" are not desirable in these conditions (put another way, anyone who runs tabs down in those conditions should remain on sheltered inland waters and seek higher piloting skills). Usually the motor is trimmed for bow up and tabs FULLY retracted. There is no waiting around for "bleed down" or "re-adjusting" of tabs. It is a BIG joke to think you can hang off the transom and change tab settings in these conditions. Tabs deployed even a little at lower speeds will not let the motor trim max bow height. Only fully retracted tabs will let the motors trim max bow height.
 

boatster

Petty Officer 1st Class
Joined
Jun 13, 2004
Messages
331
Re: Wings??

BillP,<br /><br />with my limited use on the Smart tabs I think I understand what your saying about trim tabs not working too well in a following sea. I was considering making my tabs retractable when I'm in a rough following sea as they do dampen the effect of the motor trim to lifting the bow somewhat. This maybe one of the few limitations I would hedge to believe is a shortcoming of the automatic trim tabs. However when I do want them down (90% of the time) they work beautifully so I'm sticking with em.
 

DES

Cadet
Joined
Nov 12, 2004
Messages
15
Re: Wings??

Kenny, <br />Starting with attacks on peoples experience is way off base.
Bill, no attack meant, don't belive I said anything to that effect...<br />Seems to be any one person can post his thoughts and experiences, but only a few of ya get to tell us how much we don't know.<br />Smart Tabs DO NOT affect the performance of my boat in 6-8ft swells with proper operator function, don't care what anyone else says..I've seen it, done it, day-in, day-out. I'm on the water over 300 days a year, and been doin' this game for 32 years. <br />If ya don't use them consistantly, don't open the trap and tell people "They just can't work", and there won't be any problems-they work! live with it. :)
 

BillP

Captain
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Aug 10, 2002
Messages
3,290
Re: Wings??

Originally posted by continental kenny:<br />
Kenny, <br />Starting with attacks on peoples experience is way off base.
Bill, no attack meant, don't belive I said anything to that effect...<br />Seems to be any one person can post his thoughts and experiences, but only a few of ya get to tell us how much we don't know.<br />Smart Tabs DO NOT affect the performance of my boat in 6-8ft swells with proper operator function, don't care what anyone else says..I've seen it, done it, day-in, day-out. I'm on the water over 300 days a year, and been doin' this game for 32 years. <br />If ya don't use them consistantly, don't open the trap and tell people "They just can't work", and there won't be any problems-they work! live with it. :)
Thanks for the suggestion on what to post but I'll just post my opinions whether they agree with you or not. <br /> :D <br />Re-read my post and no where do I imply or say smarttabs don't work. It is about understanding the limitations of tab systems. Try this again...if the tabs are deployed they will not (normally)let the motor trim the bow as high. Advice to the contrary could be dangerous to those who don't know better. In some situations(noted earlier as following seas), "autotabs" aren't the best choice...unless you want to hang over the side and adjust them to stay retracted in conditions that could be tedious. <br /> :D <br />You are pulling the experience card?...6'-8' swells in Kansas with your tabs? Maybe you can clarify that experience. Not long ago you were posting as an airplane mechanic with xx yrs experience and now posting as an outboard mechanic with "over 300 days a year on the water" for 32 yrs. How much of that 32 yrs is operating tabs? With that said..In the last 48 yrs of operating boats I have several 1000 hrs running boats with various tab systems in inlets and offshore. Total time operating boats WAY exceeds 500 hrs per yr x 48 yrs.<br /> :D <br />Like I said earlier, there are limitations to each tab system. Not one system does it all. It's best to learn the pros and cons of each. That's the bottom line. <br /> :D
 

DES

Cadet
Joined
Nov 12, 2004
Messages
15
Re: Wings??

Advice to the contrary could be dangerous to those who don't know better.
We don't know that you are the one to "know better", but, the Answer here is to educate.<br />Also, as to what I "claim" to do....I own 1 aircraft maintenance facility in western Ks, manage another about 140 miles east, and you have NO idea what western kansas winds of 40-50MPH out here on the flat-land can do.....Big Mac, near Ogalalla, Ne. had the road on top of the Dam removed by waves with the lake level 75ft below the top of this Dam.<br />I work at a marina on Texoma as a consultant NOW, and I guide on 4 different lakes, so maybe only 290 days a year, if that will end the pi$$ing contest you have always been known to start. <br />I did not suggest what you should post, but it's not your job to tell someone "it won't work" when you have little experience with the product.<br />No experience cards pulled by me...only you, and I doubt that experience level based on previous postings of arguments by you insted of knowledge based comments that would reflect your actual use of a product. Biased is one thing, BillP is another.
 

DES

Cadet
Joined
Nov 12, 2004
Messages
15
Re: Wings??

Oh, BTW, Bill, I'm also an FAA inspector, and a turbine (Jet) engine specialist....a guy can't make money watching TV. Thrive at what you do and success follows.
 

BillP

Captain
Joined
Aug 10, 2002
Messages
3,290
Re: Wings??

Originally posted by continental kenny:<br /> Oh, BTW, Bill, I'm also an FAA inspector, and a turbine (Jet) engine specialist....a guy can't make money watching TV. Thrive at what you do and success follows.
:eek: <br />Chill out dude. <br /><br />Let me say this about that or that about this...there wasn't a 75' wave caused by 75mph or 150mph winds at your local dam, period. If you study wind, sea and fetch it is near impossible to have 20' waves anywhere inland USA except (big exception) the Great Lakes...and that is just before hexx freezes over and all the stars are in alignment with Disney World. There isn't a lake in Kansas that gets 8' swells that weren't man made, period. Do the math...it isn't opinion. I'm NOT talking rapids down a river or earthquakes so don't go there. But 50'waves were recorded on offshore Florida buoys in the Gulf and Atlantic during the last hurricanes. 10'-15' waves are recorded many times a year during cold fronts. We get 6'-8' breakers (not swells) dozens of times a year at our local inlet. 6' swells offshore are an everyday happening here in the winter with 2-4 in summer. That's the stuff I'm talking about with tab use and safety. OOPs, did I forget to mention this is what you learn about when the USCG tests you for merchant mariner ratings and I have three ratings? Ask for a copy of my Z card and certs if you are in doubt. <br /><br />On to your other historical data... <br />I can relate to the financials of aircraft business and understand why you have so many occupations...but aircraft biz doesn't exactly make one an expert on boat tab use...therefore, I have not posted non related info about me being a pilot and owning/rebuilding exp aircraft, or being a business owner, yada,yada,yada. As for your previouly posted doubts about my credentials...there is no bs here cuz, look up N276SP and find my name in the registered owner's history. Then find my pilot endorsement and 3rd class medical currency. Then search fl corps BESCO of Brevard Inc. and Pritchett & Dunn (aka Churchstreet Center)Inc. Wowee, Zowee, BFD! It ain't got one thing to do with knowing about tabs though. :D <br /><br />Now, with your extensive product knowledge and vast experience, educate (your word) us on how auto tabs work in big seas when you want the bow to stay high as possible with motor trim. Describe how those tabs let you trim the bow up highest while they are deployed from a standing start and up to around 15 mph...which I described earlier as normal operation in poor conditions at the local inlet. <br /><br />My research on your "autotabs" says you have to lean over the transom and re-adjust the tabs for slow speeds (when previously adjusted for high speed operation)if you want them to stay retracted. You are telling me I am wrong because I don't own and use that specific product...so what am I missing? Like I posted on my first simple note "get it all on the table". For now, I bow to your claimed superior intellect on this subject. <br /> :confused:
 

boatster

Petty Officer 1st Class
Joined
Jun 13, 2004
Messages
331
Re: Wings??

It really doesn't matter what one person says or the other. Everyone clearly brings their own experience to the table (with regards to the product). I can vouche that with the auto trim tabs in a following sea I might need to have them lifted to allow for a higher bow up pitch when returning in following seas. With them on I've noticed that the effect of motor trim is significantly negated by the tabs. Its not a problem really for me because I'm either making a straight shot into the swell or returning with it. If I'm returning before I head off I can lift them out. If I made the trim tab setting too soft so that it doesn't effect bow rise then it also doesn't effect my getting up to plane and all other benefits I want it for. I agree with BillP that the tabs don't do everything. But I still stand by them as a great product. I think also when you talk about wave size, its important to note the periodicity of the waves. A 6' 7 second wave is different from a 6' 15 second period wave.<br />The short period waves will thrash a small boat regardless of proper trim. A long period wave is the kind that will broach you. This is where for me I think proper trim is important. Since Smart tabs are for small boats I think this debate has to stay within context. Also in a following sea your boat speed is also a factor. Someone correct me if I'm wrong here. I definitely don't claim to know it all but rather put what I know on the table and either have agreement or be corrected.<br /><br />Continental Kenny, can you explain what you mean by proper operator function, with regards to using the Smart Tabs? Maybe mine aren't set correctly or I'm not using them correctly.
 

DES

Cadet
Joined
Nov 12, 2004
Messages
15
Re: Wings??

Actually Boatster, your "type" of knowledge is what I'm suggesting is needed to understand how to operate in a certain manner. And the only way for most to pick that up is educate them, possibly<br />include the use of them in training seminars, that type of thing. Training a person how to operate in following seas should darn sure include a good talk on tabs, and types and how to negotiate those waves with each type.<br /><br />Billp, hope you're not in the air when we come down for sun-n-fun next trip, it's hard to see falling leaves at 320 IAS.....that'll be about 20 of us in our F-1 and Harmon Rockets.<br />You need to QUIT starting arguements that lead nowhere...What I own, or what you own has zero bearing on what we know-they've proven a Monkey can fly a plane, so that gives us zero gain over anyone else here...pilots die every day because they truely didn't understand what actually kept it in the air, and boaters are the same way-they may not actually understand the reasons behind an issue. sharing info doesn't mean pick it apart, but you are good at that.<br />Lighten up.
 

BillP

Captain
Joined
Aug 10, 2002
Messages
3,290
Re: Wings??

Originally posted by continental kenny:<br /> Actually Boatster, your "type" of knowledge is what I'm suggesting is needed to understand how to operate in a certain manner. And the only way for most to pick that up is educate them, possibly<br />include the use of them in training seminars, that type of thing. Training a person how to operate in following seas should darn sure include a good talk on tabs, and types and how to negotiate those waves with each type.<br /><br />Billp, hope you're not in the air when we come down for sun-n-fun next trip, it's hard to see falling leaves at 320 IAS.....that'll be about 20 of us in our F-1 and Harmon Rockets.<br />You need to QUIT starting arguements that lead nowhere...What I own, or what you own has zero bearing on what we know-they've proven a Monkey can fly a plane, so that gives us zero gain over anyone else here...pilots die every day because they truely didn't understand what actually kept it in the air, and boaters are the same way-they may not actually understand the reasons behind an issue. sharing info doesn't mean pick it apart, but you are good at that.<br />Lighten up.
Geez, more off topic airplane stuff and direct insults while giving political sidestep answers to questions. Maybe a run though our local inlet when you are down for SunNFun would help you understand another point of view concerning tab operation. You won't likely get that experience inland and I suppose that's the reason you object so strongly to opinions that differ from yours. It really is different in waters outside of Kansas. Regardless, your continued posting of airplane and personal attack stuff is off topic so why not provide constructive pro/con info about tab and fin operation instead?<br /><br />Keep an open mind that what you call "arguments" are detailed information sharing discussions to others. Maybe they are too detailed or trivial for your participation and maybe you don't agree with them...but you are free to stay out of the discussion and not be bothered. <br /><br />Boatster gave specific details/opinions about his tab use, I gave specific details/opinions about my tab and fin use. Both agree about broaching issues with tabs and the possible need to release autotabs if going in bad following seas. It's something a few prospective tab/fin buyers may want to be aware of...it's not product bashing (unless someone has a severe inferiority complex) or the "word" according to anybody. It's an opinion based on tab use, not fictional hype as you seem to understand it.<br /><br />To further continue data on fins and tabs:<br /><br />I can trim my 17'ob bow higher at displacement speeds with a Doelfin than without it. That would be higher than when trimmed with any type tab system in a fully retracted position.<br /><br />The fun part...I spent several hrs last Friday running a 10hr new 2550 Bluewater CC twin ob with cockpit adjustable tabs. The difference in bow height using max motor and tab trim was approx 2'. Fuel burn showed a big difference of 1.2 to 2.3mpg when tweaking tabs and motor at the same rpm...which was approx 3900 rpm. Motors are twin 150 x4 stroke counter rotating Yamahas.
 

DES

Cadet
Joined
Nov 12, 2004
Messages
15
Re: Wings??

BillP, you're right, I have no argument about this last post of yours...it's real-life experience. That's what we are here for.<br />My point is that you can't discount one product that may or may not work on one particular boat.<br />I spend most of my guiding time on Texoma, and when a 30MPH + wind hits, 6ft waves are normal, and I have played some with the tabs in all directions in those conditions and with my trim system and in my application, the trim will overcome the tabs and allow bow-rise as needed.<br />THAT is my real-life experience with these, and I would recommend them accordingly.<br />Your specifics included having to re-adjust the tab positions, and I have not found that to be the case, so to me, that is just opinion.<br /><br />
Maybe they are too detailed or trivial for your participation
Let's stay away from the personal attacks now, and talk business. Maybe we could even help someone here.
 

BillP

Captain
Joined
Aug 10, 2002
Messages
3,290
Re: Wings??

I see two differences with our boating situations with tabs. You have fairly regular following seas (probably with whitecaps)and choppy water more than swells with current against them. Whatever bow rise you can get with the motor is adequate for your purpose. Lakes have a more constant and predictable wave sequence than oceans.<br /><br />Our conditions with the same size swell as yours turns into a wave and breaks straight up and down like a wave breaking on the beach. The outgoing current runs 4-6 mph against the waves and stacks them up. Sometimes it actually causes a backwash wave that hits the incoming ones...this doubles or tripples the wave height in about 2 seconds. This happens from about 2' up to 10-12' where the inlet is "closed out" and no boats go through. Sometimes it is impossibe to ride the back of a wave in because the current has literally stopped it from going foward at the same pace as waves behind it. The two meet with the boat in between. It's hairy because the bow physically drops off the face of the wave and stuffs into the bottom of the waves when they stack like this. You can't see or predict it...only local knowledge lets you know it happens every now and then on bad days. Max bow rise is needed to reduce pitchpoling or broaching. It's "edgy" but local boaters are used to this situation and know how to deal with it...and one of the deals is keeping tabs up and motor up. That's why I alerted to bow trimming with the motor and no tabs. Running tabs down in these conditions isn't a good thing. If I had smarttabs I would stop a mile or so offshore and retract them for safety sake. <br /><br />I'm sure 99% of the people who buy tabs and fins use them for getting on a plane faster. Bow up and inlet running doesn't come into the picture...I just happen to be in the other 1% and am sensitive to that side of the story.
 

DES

Cadet
Joined
Nov 12, 2004
Messages
15
Re: Wings??

Well explained, and I apologize for my lack of knowledge of the sea conditions, I see your point.
 

mattttt25

Commander
Joined
Sep 29, 2002
Messages
2,661
Re: Wings??

great "discussion" fellas. great comebacks by both. but as an ocean engineer, i have to support bill on the wave issue.<br /><br />you both have tremendous knowledge, let's keep it to that so you both stick around. thanks for the info and opinions.
 

C-RAVEN

Seaman
Joined
Nov 1, 2004
Messages
74
Re: Wings??

The doel fins helped on my 16' runabout.<br />they are mounted on a 50 hp evinrude and i noticed 3 things right away<br />1) the bow does not lift as much on takeoff<br />2) increased stability in steering<br />3) easier to plane, and stay on plane longer.<br /><br />also, may be imagination,but i think i get better fuel economy.<br /><br />they cost under $20.00 us. couldn't hurt for a small investment.
 

Jdeagro

iboats.com Partner
Joined
Jul 30, 2003
Messages
1,682
Re: Wings??

Well that is about as agressive a debate as I've seen on any topic or forum.<br /><br />I do not want to prolong this nor cause additional debate, however for BillP I would like to provide a bit of technical info.<br /><br />Depending on the model the actuator resistance is different. For example: the ST980-40 has 40 Lb. actuators and the ST1290-60 has 60Lb actuators.<br /><br />The reason I bring theis up is that when under way the maximum stern lift you would get from the 60 Lb actuators would be 60 Lbs, and that can be adjusted mor or less during installation. We recommend that the pressure be set so that the top speed of the boat is at least 2 to 4 mph more with the tabs than without. This limits the stern lift when cruising so that the bow is not pushed down byt the tabs and the motor trim is not fighting the tabs. <br /><br />The next thing to consider is that the Smart Tabs will rotate up beyond horizontal(beyond fully retracted)which further limits the stern lift. In other words the extra travell of the actuator insures that the lift is never more than the actuator allows (is adjusted to), unlike electric or hydraulic tabs which will "bottom out" when fully retracted. The limited amount of lift that the tabs provide once the boat is on plane will have little effect on the motor trim.<br /><br />One last thing - the tab pressure is less (by 30% to 35%) once they are pushed up for the very reasons you are pointing out. We do not want excessive bow pressure when on plane. <br /><br />Other things that can shift bow to stern such as gas and water would will cause as much or more variance in weight distribution as the Smart Tabs in a following sea.<br /><br />I think Bill is over estimating the stern lift effect of Smart Tabs when the boat is underway. It is not as much as you would think, and the tabs are not deployed once the speed is above 17 to 20 MPH (unless they are not properly adjsuted or sized). <br /><br />All of this said - the best system is the one that the pilot is comfortable with, and Bill is obviously very comfortable with helm controlled tabs. No one should use a boat or equipment they feel uncomfortable using. <br /><br />We have tested and used them for six years off the souther California Coast, and we are comfortable with the boat response.
 
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