Our Bulbous Bow addition to Sea Venture - Learn what, why, how, the cost, and if you should . . EP78
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- Part 2 of 2 of our journey from an idea to a reality as we research, decide, and add a bulbous bow to our home and ocean going trawler yacht, Sea Venture.
Visit our website: www.CruisingSeaVenture.com
There you will find:
1) Organized links to all our videos
2) Q&A of over 100 questions
3) Our Blog where we provide great information about different topics
4) A link to “Where is Sea Venture right now” along with the current weather
5) A link to Join the Venture Club - club members get more benefits - all for free
6) A history of Sea Venture - with lots of details about the boat
7) A chance to meet the crew and learn more about us and our boating history Lots of fun stuff - so check it out!
Instagram: / cruising_sea_venture
This is our trawler life story.
We retired early and decided to make a big change. We sold everything and moved aboard our 54' Cheoy Lee passagemaker, a “go anywhere in the world”, ocean going power boat.
That was in 2014 and we have never looked back.
Now in our late 50's we are free of work and we are living aboard and cruising our trawler full time.
We have two additional crew members, feline brothers, Blake and Barkley. Yes, we have two brave (sorta) boat cats, on board!
Join us and our crew, on our adventures as we explore new places, discover more about our trawler and what makes her work, and learn more about ourselves in our young retirement years. Our hope is to entertain and inspire you to pursue your own passions through telling our story of our cruising trawler lifestyle.
We end most episodes with a “Trawler Q&A” where we answer your questions.
Thanks for watching, subscribing, and liking Cruising Sea Venture!
Best, Jim, Rosy, Blake and Barkley
My takeaway from this one is:
1. The bulbous bow does for slower (and larger) boats what automatic trim tabs and engine trim does on a "go-fast". Keep the bow trimmed down and minimize the pitching. Biggest advantage over tabs is, the bulb is entirely _passive_.
2. The paravane setup does what a Seakeeper gyro or a fin stabilizer system does to reduce the rolling. I'm going to guess that the paravane costs significantly less than either a fin or gyro stabilizer system would have.
Great presentation guys, thank you for sharing this information!
another mentioning: at Minute 32 you tell us about prejudices . There is a sentence in Germany , that I like very much, I will try to translate:
"Everybody was telling that it is not possible. Than one man came, who did not know this, and simply made it..." stay healthy
The guys over here in the North Atlantic use spray rails mounted on the bows of their fishing trawlers and lobster boats to make the ride drier. I'm happy this project added some benefits. I admit I was skeptical but optimistic as I had heard success stories with a bulb. I wasn't sure if those stories were hyped up to keep owners and installers from losing face or if it was legit. Thanks for taking us along for the ride and giving us an honest assement.
Ben, Thanks for watching. So far, so good. Over time we will get a lot more opportunity to see how it performs in different conditions. Thanks, Jim
@@CruisingSeaVenture You're seeing good results this early. I have a feeling they will only get better with miles traveled and hours of running.
well worth it the money now you'll be more comfortable
It's amazing how effective the bulbous bow is at reducing pitching. That kind of real life documentation is so helpful. Thanks for doing that! I had no idea that, that is one of the benefits.
The best Bulbous Bow information video I have seen so far, excellent step by step coverage, well done guys. Congratulations for the new addition to your trawler Sea Venture
Wow, thank you! Jim
Thanks for this video! Really good information, and you guys are breaking new cruising ground with your bulbous bow install and future videos. I'm excited to see how things continue to develop. I'm sure your future videos, with the new drone and underwater drone will be spectacular. I don't know of any other cruising couple who are doing the things your doing. Love, love, love your channel!
Thank you so much. Jim
This is something I have been thinking about. Your observations are very interesting. We are on our way over the top of Australia to the Kimberly region ,and then maybe complete a circumnavigation. We currently have rolling chocks on our hulll ,but a bulbous bow and paravanes are a consideration before the great Australian Bight. Looking forward to more sea trials. Best wishes to you both.Brian and Sandra Dorling
MV Sealeaf
Hi Brian, I would think the rolling chocks work well. I bet you have watched our series on the refit where we added the paravanes. They really work, in all conditions. Plus they are simple, easy to fix, etc. The bulb will take more time to come to any final conclusions, but so far so good. After having paravanes, I wouldn't spend much time in open ocean with them. Thanks for watching, Jim
Awesome new gadgets on the way! Our bit is in its slip, north of Boston, but it’s still too cold to enjoy it yet. (No Pilot house). 😳
Thanks for these videos about the bulbous bow on Sea Venture. Very interesting and informative.
I had Paravanes on my 37' rounded bilge keel MS EHUKAI(1983) in Hawaiian waters, THEY WORKED GREAT!!!! 👍
Other than the 1,500lbs. ice hold for fish, they where well worth the $'s
Very cool! We love our paravanes. If case you haven't seen it, we did an entire 8 part series on our paravane superstructure refit. You can find more at our website: www.CruisingSeaVenture.com To us, the paravanes change everything as full time cruisers with no permanent moorage. Enjoying this winter cruising SE Alaska all by ourselves - the paravanes are in the water about 90% of the time. Thanks, Jim
👍 Thanks, will watch it.
BTW, a person aboard the 'TEST' said they would scare fish. We caught a 35lb. ONO (Wahoo) in the fish hour... not even triing 🙂
My guess was $25k . I was thinking when you showed the testing of the BB that you were getting more spray across the bow because the yacht is going through the waves , not over them as much. I would love to see a view of the yacht moving through the water. i.e. from your tender as the yacht is moving.( or Rosy could use her new drone) I think that you would really see if your yacht is squatting on take off and how the water is moving over and around the bow and also any secondary wave it creates. I was really interested in the fact that the bulbous bow was filled with sea water, I had not even thought of that, I actually thought it was empty (air filled) . Thanks for the education. Learn something new every day.
We'll do this - just maybe not when it's 32 degrees out. Thanks, Jim
That is a very nice addition to your boat I love your videos keep it pls
Thanks again, very interesting and I will look forward to seeing your long term conclusion and data.
I think it was colder here in N Texas during Snowmageddon than in Alaska. My Carver 3807 is locked in about 6 inches of ice on Lake Texoma.
It is. Here in Alaska right now, 38 degrees and raining all day. Thanks for watching, Jim
Now there's the result I was looking for! I HATE Being Sea Sick!!!! Great Job!
I was low at 10k! Surprised the tube was 4k and I didn't figure the marina fee at 1900.00.
Once again you put out a great video. Thank you Jim and Rosie .Looking forward to next Saturday. :)
Rosy is working on the editing now! Thanks, Jim
Love this. You guys have a new subscriber. Safe travels
Hmmmmm, new doors just like Nordhavn's. You'll love them.
I did have twenty thousand in mind, pretty close guess. You now have the bulbous bow, the fish to the side, where are you going to mount the home built seakeeper?
New to your channel, who's the builder of Sea Venture?
If you want to know if the weight of the bow is affecting ride/trim, test it both full of water and empty.
Absolutely. The bulb weighs 1,300 lbs. It added 1.4% of the weight of the boat. Our initial sea trials were with 1/2 load of fuel and water. The video you saw was with full load of fuel and water. Sea Venture weighs 90,000 when fully loaded, of which 26,000 lbs is fuel and water (2,158 gallons of diesel and 1,200 gallons of water). On a 1/2 load the stern actually came up just a little. As you could see in the video, on a full load (most of the added fuel was in the stern) she maintained the same trim. Thanks for watching. Jim
WOW! Huuuugggge improvement!!
You guys are so much fun! Loved the sea trails testing the BB. I think you will enjoy this new feature which definitely will increase the safety and ride in ruff weather.
You guys Rock 😄
Love your videos
Thanks for sharing !
Sail on !
Very informative videos and looking forward to new projects
Glad that seems to have been a success for y'all.
How nervous were you on that 1st sea trial, that it handled terrible and gonna have to cut it off, ha.
If it ends up truly gaining .5knt and rides that flat, that would be huge in my opinion.
Curious on how it handles in big following seas, if it wants to bow steer. Will be following this, thanks
So far, so good. I think the question about following seas is going to be interesting. Sea Venture tracks ok in following seas, or did before I think as a result of the main center keel and the two fin keels. Will it hold the bow back, causing the stern to swing around more? Will it act like an additional keep and help it track even straighter? Will the reduction in deceleration in the trough reduce the desire for the stern move over and pass the bow? It will be interesting to find out. As we observe more and learn I will do some blog post updates on our website. Still lots to learn. Thanks for watching, Jim
I have really enjoyed your videos! Great enthusiasm and passion for the cruising lifestyle!
My guess was $35,000.00 and I was pleasantly surprised at your actual costs. I guess I'm used to Southern California prices.
What an amazing difference in pitching you have achieved. It will be interesting to see how the vessel behaves when you travel south in open waters along the West coast. In my limited experience off the coast of CA in Ventura, that when heading in to the swell, the bow has a tendency to rise over the waves as opposed to piercing the waves. Obviously this in advantageous as the wave height increases. It will be interesting to see how the bulb and the added water weight affect the ride in bigger seas!
By the way, it's almost as much fun watching you cruise and work on your boat as actually doing it on mine!
Defever 53 POC 1986
Michael, Glad you enjoyed the video. The bulb is not water tight, it's flooded with sea water - it has a hole drilled in the top and bottom. Based on the design elements detailed by the University of British Columbia Marine Research Center, the bulb should dampen the roll, and you can see, but not reduce the roll so great as to be an issue in large seas. So far, when we have run into larger seas / swells the bow certainly still rises and falls, it just isn't quite as much and not as sharp of a movement. According to the math in large seas instead of pitching 5 degrees, Sea Venture should pitch about 2.5 degrees. Time will tell. Thanks, for watching, Jim
Great explanations of everything, please just pay closer attention to your voice over volumes, made the speakers crackle a bit.
Thank you for sharing!!
Glad to hear your positive results with the addition of the bulbous bow. Would you please explain the need for the top and bottom holes in the new bulbous bow? Thanks in advance.
Thanks for watching. If the bulb was not flooded, it would have made the bow more buoyant. So part of all the calculations included it being filled with water. Thanks, Jim
@@CruisingSeaVenture Oh, ok. I did not hear that part but thank you for the clarification. As far as the type of water, can I assume that it was distilled or demineralised water? Thanks in advance.
Actually it just floods with sea water. Then the next question is what about marine life that can grow inside? :)
Regarding the critters - this is going to be interesting. What we have been instructed to do is when the boat comes out of the water to let it dry out for a couple of days, then plug the bottom hole and fill it with fresh water mixed with bleach and let it set. This, in theory, should flush most of what is inside out. Wonder how you will know? One day we will learn. It mostly likely will be 2-3 years before we need to haul out, so it will be awhile.
Thanks,
Jim
You have done the best choice! Really not expensive for the advantages! Congratulations.
Love it
That was fast and I'm not complaining!
Sounds like expanded view points of your adventure are soon to come. Great
LOVE your vid, its sucsinkness, clarity, good humor. Thanks
Well worth it. (I guessed $10,000) wow was I way off. Does the holes in the bulb let all kinds of growth form inside the bulb? and if so how would you clean it. I assumed it was coated inside with bottom paint. Thank you for your videos, great job.
Chuck, Yes, the inside had several layers of bottom paint.
Regarding the critters - this is going to be interesting. What we have been instructed to do is when the boat comes out of the water to let it dry out for a couple of days, then plug the bottom hole and fill it with fresh water mixed with bleach and let it set. This, in theory, should flush most of what is inside out. Wonder how you will know? One day we will learn. It mostly likely will be 2-3 years before we need to haul out, so it will be awhile.
Were they using epoxy or polyester for the build. What type of mat was used? Good demonstration and information. Thanks
Amazing video
Great stuff guys! I love your style, and your commitment to follow through with dreams and new ideas 💡!!!
Keep it up, we’ll be watching and learning...
Definitely makes sense for a displacement hull
Very interesting video! Thanks.
Enjoyable videos! If the bulb was not full of water do you think this would impair it’s ability to reduce pitching, or have you tried trimming the boat with more forward weight in the past to see if that helped reduce pitching?
Thanks for watching. It would have to be a whole lot weight. Sea Venture weighs 90,000 lbs. The bulbous bow added 1.3% to the weight of the boat. In the bow of the boat is our 150 gallon black water holding tank. Between full and empty that is adding 1,000 lbs right at the front of the boat, and it does not change the trim at all when the tank is emptied. Thanks, Jim
Informative videos , thank you. Another fun toy is a hydrophone.
Glad you're liking your new bulbous. I was wondering if you have any problems with lowering and raising the anchor.
As designed, the anchor drops right in front of the bulb.
I didn't include port/hauling-out fees and am shocked at the price of the tube and GRP materials.
I would of filled the bulb with expanding marine foam as an extra cushion upon any large impacts
NO LIE! I immediately guessed 20,000. Wow, what a project. Looks like you went to the right yard! Looks like you did the right thing. Will up your Paravane project. They seem to work really well. Trawlers can really roll!
With the holes top and bottom it is free flooding, how will you deal with marine growth inside the bulb?
Andy, thanks for watching.
Regarding the critters - this is going to be interesting. What we have been instructed to do is when the boat comes out of the water to let it dry out for a couple of days, then plug the bottom hole and fill it with fresh water mixed with bleach and let it set. This, in theory, should flush most of what is inside out. Wonder how you will know? One day we will learn. It mostly likely will be 2-3 years before we need to haul out, so it will be awhile.
Jim
how do you clean the inside of the project. with holes wont sea life live in there?
Great question.
Regarding the critters - this is going to be interesting. What we have been instructed to do is when the boat comes out of the water to let it dry out for a couple of days, then plug the bottom hole and fill it with fresh water mixed with bleach and let it set. This, in theory, should flush most of what is inside out. Wonder how you will know? One day we will learn. It mostly likely will be 2-3 years before we need to haul out, so it will be awhile.
I am adding a set of these to my catamaran. Scary more work than yours...mine offer displacement; no holes
I wonder what your experiences are, now almost 1 year later.
did it pay off its investment?
maybe time for an update?
An update is a good idea. Absolutely it has paid off in significant reduction in pitching. It made all the difference in Alaska on our trip south and down the Washington to California trip, which will be in an upcoming video. Thanks for watching, Jim
@@CruisingSeaVenture I love you channel, great video’s of beautiful places (for a Dutch guy)
Total amount 50,000 smackaroonies
Remarkable improvement! My guess was $30k. The engineering/installation was crucial...a couple degrees off would have changed the dynamic completely. Money well spent. You must be ecstatic! And new toys coming...whoopee!
Alex, A lot of effort was put into it being exactly on the center line and level with the keel. Thanks for watching, Jim
I just love watching y'all so much every week. You are so genuine and so pure and you never fail to make me smile in sharing your adventures. I am so glad to be a part of your 'TH-cam Family' and I hope that someday I am able to meet you four out on the water! Congrats on the new toys and the new bow!
Thank you so much!! Jim
One of the things that you were hope to get by reducing the pitching was happier cats. I'm guessing that the four legged crew are as happy with the new bow as the two legged ones are. looking forward to your future data gathering trips.
Two things to consider... the weight of the bulbous bow for not only the fiberglass, but the sea water in it doesn’t want to move very easily. In order for the bow to rise, it has to pick all that weight up. Also, to move that volume and size object vertically through the water as the bow attempts to rise and fall is difficult and takes a lot of energy. Those two things contribute to the efficiency of the bulbous bow in reducing pitching. This was a wonderful video. The benefit far outweighs the cost.
Something you may not have considered. Cruise ships don't flood their bulbous bow unless they anticipate heavy weather. Might be a good addition to add the ability to flood the bulb or pump it out according to sea state. That would not be a very expensive modification.
That is certainly something that could be considered if we thought it would have some benefit to being empty at times and full other times. Thanks for watching, Jim
I guessed 30k. Very interesting how well this reduced the pitching. Good investment.
Impressive results and information about the bulbous bow. Thanks for sharing.
Thanks for watching! Jim
When you deploy the anchor, doesn't it bonk into the bulbous bow?
Bill, It does not. The bulbous bow is shorter then the bow sprit - the anchor drops down in front of it. Thanks for watching, Jim
Great question. I bet you could hit it in a rough Anchorage.
20K for cat comfort! And I thought I loved my animals! I truly enjoy following your adventures.😎
Yea...drone battles?
Great job! Thanks for all of the details about the thought process that led to your decision for the new bow. I guessed $15k before you revealed the true cost. Hope the weather gets a little better so you can enjoy some winter cruising. Stay safe!
You two are great what a great life story in Adventures have fun here in God's country
Fantastic addition to an already terrific yatch! I also think you did very well. I guessed $30k. And the crew did a great job!!! Love your videos, fun to live vicariously through your adventures as I look out into Bham bay "boat less" - for now... Cheers!
Sure seems like a worthwhile investment. My guess was in the neighborhood of $15,000.
Congratulations! So happy to hear the Bulbous Bow worked out. Both videos were very enlightening and entertaining. My guess on the price was way off.... I thought it would be much more expensive, especially after watching all of the labor involved in the installation. The side-by-side videos of pitch verified that your ultimate goal was met... very cool. Looking forward to watching and learning more. Cheers from So Cali.
Thank you so much! So far so good. Thanks for watching, Jim
I was 451 dollars to high at my 20K guess. But you probably spent that much for cat food, your food and drinks while in the ship yard. Nice report! About your USCG boarding, I am a USCG Vietnam Veteran ET1 (plank owner/first crew of one on the SE Asia Loran C stations which we built in the summer of 1966 at Sattahip Thailand, and was there for 11 months). A few years back my friends were just finishing up a CG boarding inspection outside Fisherman's Bay on Lopez Island, when we came along in our 3388 Bayliner "Endless Summer", which we had for 19 years , and Greg said to them, that guy is an ex Coastie, go board him!!! Which they did.
She sure looks much more stable with the bulbous bow. She is your vessel, if you notice the difference then it's all worth it. Are there. a few cons? Yes, but again, doesn't matter if it improved your ride on your vessel. I wonder why Nordhaven doesn't do that on their boats, at least the smaller range. I bet the new n41 would benefit from a BB.
WOW! Great investment to value. I can't believe the improvement. Great looking ride. Thanks for sharing 🙂
You got a bargain at 20K! The workmanship was excellent. The new performance is a profound improvement. Bravo to you, the work crew and the yard.
Ok I'll Bite, Guessing $25,000 for the bulbous bow. Like the videos, Michael from Sunny Sandspit.
You simply must love
"BULB CAM DOCKING".
I've heard that greed has a tendency to lower ones IQ.Could it be considered being greedy if you guys were to copyright that?
I personally don't think so.It is nice to know that another loving and intelligent couple are living AND enjoying their dream. Calm seas and many safe journeys and adventures to you guys.
Amazing results It's going to be so smooth you'll not want to stop at anchorage or port.Lol
I think I have read or heard that waves come in sets of seven,the seventh having a different sized trough and or crest? If so the"thumping" could be caused by the second wash created by the bulb reflecting that difference. I don't know but at least you guys have given food for thought worthy of investigation.
I don't gamble but I would bet the farm that fuel efficiency has increased due to the pitch being reduced, as you thought. Less energy is being spent getting vessel back to plane and keeping it there. Increase in waterline length as you mentioned definitely helps if that can be factored in.
I guessed $22k
had lots of questions...yeah and nay.... very informational video.Not that I can afford a trawler...but till then I enjoy your videos...thanks for the great information.
I think that was money well spent, mission accomplished! I know you all, including your 4 legged family members, will all be more comfortable and I would think safer as well. I loved seeing the excitement on your faces as you talk about the new upcoming 'accessories' to your travels and I can't wait to see the footage! Thanks again for sharing, love you both!
You folks are phenomenal!! You've accomplished exactly what you set out to do with the bulbous bow. Frankly, I was estimating about $40K, but then again, I'm from NY and that would probably be close. Only 10K for labor over a 13 day period....amazing !!.
$40K was the Seattle quote as well. Thanks for watching, Jim
Sheesh I was way low at 13,500.. But from what I have seen well worth it. Especially if you are going to live on the boat and travel a lot in open waters.. thanks a million this was very very informative!
The reduction of pitching compared to the original bow makes the addition worth it.i can only imagine how a boat of that size would perform if it was designed for the bulbous bow
This is one of the most interesting videos I've seen. Great job! Money well spent. I figured $35-40K.
Thank you, excellent practical description.
It definitely stop the pitching
Very informative parts 1 and 2. Thank you for your details and for sharing.
The bulb cam! Y’all kill me. 🤣
I think y'all are the first to show this difference! Heck, I'm sold. Put your $ for your month is. And looks like it did what the kids needed!!
Thanks for sharing ❤️. My cost guess would have covered the labor. 🤷🏼♂️ so I’ll pre guess the new door cost at $10000
Spot on the price of the new doors, $10,000. Doors themselves are right at $8,000 plus $2,000 installation labor. They should be arriving in about 10 more days. Thanks for watching, Jim
Make my guess $40,000, it seems like a good bang for the buck for $20,000
Amazing............. Well worth the espense....... I was right on with the $ estimate...
Thanks for the vid
Congratulations on your bow modification. Greetings from Weeki Wachee.
Super delightful to learn and understand what it takes to own and maintain a beautiful vessel. I'm not a boat owner but enjoy learning and starting to understand the technical details. Just like my high performance sports car. Never finished with maintenance and upkeep. You got to love it. Thank you again .It is always fun to hear what you have to say
I'm glad you are finding it interesting. Sports cars . . . . I use to drive a 12 cylinder, Mercedes S600 2 door - by far the most fun I ever had in a car. It was non-stop upkeep. Now I'm going a whole lot slower, but still have lots of maintenance to do. Thanks, Jim
A benefit for sure.
My guess for the bulb was $22,000.
Looks like a complete success to me! And as you say this is a large success for a moderate cost really. Secondly...Rosie...get that drone in the AIR!! Jim has a drone but hardly uses it. Not sure why, maybe he is afraid to crash it..lol. So Rosie please drag that drone out and do some filming. And lastly I actually guessed 20K. So I was pretty close. Awesome video and I would bet this video will be played for many many years as a great info source for bulbous bows on Trawlers. You have managed to fill quite a void regarding information. Looking forward to more data.
Jim here - . . . . Yes, I have been afraid of crashing the drone. We have been practicing in the parking lot with hand launching and retrieving, so I think we are getting there. Thanks for watching and commenting, Jim
Great 2 part video thank you, Be Safe Be Happy. Be Healty
Congratulations guys it looks great and from the videos I think it is a huge success. It will make cruising far more comfortable and enjoyable. Thanks for sharing and appreciate you making the videos. I will bet that you will get better performance and an increased range with what you have done. Wins all round in my opinion.
Thank for doing this video I now now to look for a builder that uses the bulb
Very impressive!!! Great choice y'all made....I'm sure it will increase the joy of the travels as well as frequency, since she can handle more adverse conditions without compromising y'alls comfort.
That Bulb cam is so cool. Love the information in these two videos.
Terrific video. The bulbous bow looks great.
THANK YOU FOR YOUR MATURITY. & VERY HI QUALITY. VIDEOS
Thank you guys! Love what you do! Watching from the Detroit area. Come to the Great Lakes !