What makes a sprint boat turn so hard??

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  • Опубликовано: 26 авг 2024

Комментарии • 127

  • @kalebk0422
    @kalebk0422 2 года назад +25

    Who’s here because of Cleetus???

    • @ibbylancaster8981
      @ibbylancaster8981 2 года назад

      👋👋👋🇺🇸🇺🇸

    • @beemerkon
      @beemerkon 2 года назад

      This guy was here way before cleet even came to visit

    • @Coopsfixeruppershop
      @Coopsfixeruppershop Год назад

      I am here because of Cleetus, but subscribed for the great content!

    • @fredericrike5974
      @fredericrike5974 Год назад

      Why am I here? I didn't put this here. I swear I was nowhere near here until just before you showed up, officer! FR

  • @hampusprahl5379
    @hampusprahl5379 2 года назад +7

    Thanks for the explanation, couldn't resist coming here after looking at Cleetus test these incredible machines.

  • @claytondyck5075
    @claytondyck5075 2 года назад +4

    Good info to a question I always wondered about. Found you via Cleetus

  • @rob449
    @rob449 2 года назад +12

    Just saw you guys on Cleetus channel. You guys are awesome people's trusting some new guy to drive your boat.I learned so much about these boats. Keep up the good Content!!!

  • @bentoombs
    @bentoombs 2 года назад +11

    How did I not know you had a channel. Great explanation. You and your crew are great for the sport. You guys always put on a show and helped us when in need. Thank you

  • @gafrers
    @gafrers 2 года назад +2

    Another Interesting video 👍👍

  • @alkennedy1124
    @alkennedy1124 2 года назад +3

    Nice thanks I’m learning a lot from you ,and I just subscribed 20 miniuts ago ,from the Cleetus drive in the boat of your ona lake in Washington, nice thanks BigAl California

  • @russelldesilva1560
    @russelldesilva1560 2 года назад +11

    Great explanation. To my mind Jet Sprint is the best motor sport to watch by a country mile. The boats have absolutely spectacular agility, they make F1 cars look like toy toy strollers. 👍

  • @2aamendaz608
    @2aamendaz608 2 года назад +4

    Found you thru Cleetus!! Awesome info man those Scott pumps are wild!! I am used to Berks, Dominator, and American Turbine jet drives on Kachinas, Sleekcrafts, Eliminators type boats.

  • @jayvonbargen642
    @jayvonbargen642 2 года назад +2

    Found your channel from watching Cleetus love the tec stuff. Im from shelton/oly been in kansas 20 years love your content.

  • @Chris.Davies
    @Chris.Davies Год назад +1

    Most river-running jetboat hull bottoms are very flat, so they can run through 5cm of water depth.
    Kiwi Bill Hamilton's original idea was to be able to access areas by river that could not be accessed using any other means - except perhaps a helicopter.
    It worked!
    Then the hulls began to evolve in order to run very shallow waters. This resulted in the typical tail-happy jetboat which behaves like a super powerful car, steering with the rear wheels under power. I call my Porsche 928 a "Land Jet", because of the way the tail wags under power, and the way the nose rises when I hit the gas hard, and the way I often gas-and-coast in it.

  • @stephenb7822
    @stephenb7822 2 года назад +1

    Awesome, thanks for showing this, been watching sprint boats for years and always wondered what the bottom of a sprint boat looked like.

    • @JollyRoger907
      @JollyRoger907  Год назад

      Right on Stephen, not many people will actually show the bottom of their boats lol

  • @ibbylancaster8981
    @ibbylancaster8981 2 года назад +1

    I’ve always thought this was cool stuff but being a welder, I enjoy the mechanics of things . Cool video and explanation . Much love from another Cleeter fan in North Carolina

    • @JollyRoger907
      @JollyRoger907  Год назад

      Right on! Will be doing lots of builds this winter you should enjoy!

  • @peterrivney552
    @peterrivney552 2 года назад +2

    Great explanation of how they turn so quickly thank you for you video ...

  • @victorriceroni8455
    @victorriceroni8455 2 года назад +1

    Thanks for this. Watching these boats, I always thought there was some dark sorcery involved.😉

  • @neilreid2298
    @neilreid2298 2 года назад +1

    Very cool. Surprised that strakes that shallow provide so much dig on the water. Incredible!

  • @HalfCutGarage
    @HalfCutGarage 3 года назад +4

    Good one!!! Always pickup useful info out of your videos!! Must be some kind of rush driving one of those boats !!!

    • @JollyRoger907
      @JollyRoger907  3 года назад +3

      Been driving these for 10 years and it’s still a rush!!!

    • @HalfCutGarage
      @HalfCutGarage 3 года назад +1

      I bet!!!! I dont think they get the coverage they deserve! Mind you I don't think us minijet boat guys get the attention we deserve either ...... keep up the great work!

  • @Jeanclaudevanderfield
    @Jeanclaudevanderfield Год назад +1

    Great video and awesome boats!! Thanks so much for sharing!!

  • @keithhuckabee9859
    @keithhuckabee9859 2 года назад +2

    Thanks!

  • @user-od9iz9cv1w
    @user-od9iz9cv1w 2 года назад +2

    Super happy that Garrett introduced me to your channel. Really cool boats, and you are knowledgeable and a natural on channel. Enjoy the ride. Your channel may just blow up in a good way. You may earn a few RUclips bucks to build some more cool toys.

  • @moparman1962
    @moparman1962 2 года назад +1

    Cool. I see you are getting a lot of people saying they liked this video also, after they came to your channel and subscribed because Cleetus came and hung out with you and he recommended they check out your channel. I'm one of them.

    • @JollyRoger907
      @JollyRoger907  Год назад

      Welcome Mike, super glad to have you on the channel

  • @DeanSchumacher
    @DeanSchumacher 2 года назад +1

    Great piece of work awesome sport

  • @frank7911
    @frank7911 2 года назад +2

    imagine how well made a boat has to be for a complete beginner to set the fastest lap of the event with it. no half-assery could ever achieve that.

    • @JollyRoger907
      @JollyRoger907  Год назад +1

      I really do appreciate that! I knew we had to put Cleet in not only a tall enough boat but a fast one! The #208 was the first race boat I ever built

  • @unpluggedkiwi1063
    @unpluggedkiwi1063 Год назад

    I realise that you were talking mostly about the hull rather than the jet unit. But would have been good to mention that Jet boats have always had amazing turning and manoeuvrability, right from when the concept was invented and developed by Bill Hamilton in New Zealand.

  • @jotham123
    @jotham123 2 года назад +10

    I've been trying to tune a RC scale boat, and your video has been extremely insightful as to what I can do to improve the handling. What about nozzle trim? How many degrees of up or down trim is common? It also occurred to me that perhaps the axis of rotation of the nozzle could be changed to give more nozzle up or down when turning. Is that ever implemented?

    • @JollyRoger907
      @JollyRoger907  Год назад

      Don’t use nozzle trim on race boats but definitely do on miniboats

  • @zacharywinters9413
    @zacharywinters9413 Год назад

    I am so thankful for this knowledge!!

  • @vehdynam
    @vehdynam 2 года назад +1

    Very interesting . New to the channel ( Cleetus) and love these boats . Thank you.

  • @quickdeuce
    @quickdeuce 2 года назад +1

    Thank you for sharing this video with us!! Another fan of Cleetus and now a fan of yours! We're looking forward to the next videos you share with us :) STAY SAFE, GO FAST and QUICK and wishing you all the success you deserve.

    • @JollyRoger907
      @JollyRoger907  Год назад

      Thank you John, hope you enjoy the content. I know I’m not as cool as Cleet lol but I’m definitely passionate about boats & building!

  • @Devyyy
    @Devyyy 2 года назад +1

    Hi from the vid with Cleetus, thanks for the great explanation!

  • @scottyshaffer6103
    @scottyshaffer6103 2 года назад +1

    Does Finnegan know this Strategie... his boats don't turn ... seem Garett got it it ...point and shoot and hang ... love your collab with him, y'all are the best! that Giraffe can drive anything lmao y'all are one out of a thousand, content is awesome yalll!!! Next is formula hillclimbs!!!!!????

  • @chrismadaj8751
    @chrismadaj8751 Год назад +2

    This is so cool thanks for all the information Garrett is a great dude 😀 hope things are good with Garrett's stardom helping you out

    • @JollyRoger907
      @JollyRoger907  Год назад +2

      Definitely a bump…I’m up to $180 on RUclips now 🤣🤣😍

    • @chrismadaj8751
      @chrismadaj8751 Год назад

      You are a really great person love them boat's you really know your stuff
      I live in Saginaw Michigan next to Saginaw' River we have boat racing here in the mid eighty they had the big ones offshore boats that race in Saginaw Bay and formula one it was called the River Roar the week before the 4th of July just wondering if you ever heard about it. Sure bring a lot of money to the city. Hopefully it will get the sport a big boost I think it will GODSPEED

  • @HiggyRSQ
    @HiggyRSQ 2 года назад +1

    There is a 5th element to it, driver confidence. Will my boat make that turn. Over my years of watching sprints as a safety marshal I have watched many dual driven boats. Typically the regular driver will put down a good lap, the second will be a little conservative until the confidence level rises.

    • @JollyRoger907
      @JollyRoger907  2 года назад +1

      That was the hardest part in my first year…trusting the boat will make the turn. Everything in your brain tells you to lift!!!

  • @bastholio
    @bastholio 2 года назад +1

    Good stuff!

  • @AjGalloway95
    @AjGalloway95 2 года назад +1

    Such a great video explanation thanks!! So cool

  • @nfinitymarine4466
    @nfinitymarine4466 3 года назад +3

    So you've got in the neighborhood of 120 sq inch of lifting surface. 1200 pound boat?
    14 foot?
    650 hp?
    That's some crazy lift.

  • @MidwestOutlaw86
    @MidwestOutlaw86 2 года назад +2

    You live my dream life.

  • @basedsigma5634
    @basedsigma5634 Год назад

    Nice.
    Learnt something today👍🏁🏁

  • @danielhoma8081
    @danielhoma8081 2 года назад

    Hey just before I watched this video there was one call Wildest Crashes in USA Sprintboat History. I counted 5 flips by the 907 and 2 with the other boat ..

  • @iamkian
    @iamkian 3 года назад +1

    I hope you can help.
    My dad and I build a jet board (jet surf) with two jets powered by 2 electric motors.
    The 1st version we build was a converted surfboard with the same motor / jet setup.
    This version was running on what we call a S6 Li-ion battery setup. The RPM's we got at WOT was around 11.000 RPM, and the jets were pushing about 30 KG.
    Max speed was about 35 km/h
    We had no problems with this setup, however we wanted to go faster, and make our own board!
    The new version is a DIY board with a 12S Li-ion battery setup. The RPM's are just over 16.000 RPM. Push power now is +50 KG.
    However we are having a lot (A LOT) of cavitation problems with the new board. When riding it you can hear both jets revving up, but feeling power loss!
    The bottom of the board is flat, but does not feel smooth (it's a carbon fiber bottom, and we did put DD varnish on it).
    Do you think that this "not feeling smooth" could cause the cavitation of the jets?
    The jets are when I'm on the board fully submerged!
    Is there something we could do to the bottom of the board to stop this air mixing with water problem?

    • @JollyRoger907
      @JollyRoger907  3 года назад +1

      My guess is you’re getting too much RPM for the impeller/blade. Our race pumps are limited to about 6600-6800 rpm before they literally pure’ the water and shoot out foam instead of a steady column of water. Lower your RPM, bigger impeller but neck down the tail cone is my advice.

    • @iamkian
      @iamkian 3 года назад +1

      @@JollyRoger907 Thank you for your reply.
      The thing is that if we tether the board down (as we did for some static testing) it did not have this problem.
      Bigger impellers is unfortunately not an option :-(
      I do not like posting links, but here is a run with me on the board.
      This is with the last setup, but still without the last carbon fiber layer.
      instagram.com/p/CNHeJ0YFaEU/
      Please let me know if you want me to remove the link in this post.

    • @JollyRoger907
      @JollyRoger907  3 года назад +2

      @@iamkian when I say bigger I don’t mean larger diameter, I mean more pitch

    • @iamkian
      @iamkian 3 года назад +3

      @@JollyRoger907 We can, and will try that!
      Thank you.

  • @GaryLordsWayMinistry
    @GaryLordsWayMinistry 2 года назад

    The rails on the bottom of the boat (help with the sliding) and the suction of the pump motors of the jet sucking in large amounts of water keep it sucked down to the water, hit a wake or something lose suction you can't corner like that anymore until the hull gets contact with the water. Simple physics. Tires is a bad analogy because even indy cars that do the best cornering are slicks so more rubber is on the ground for less sliding only do the grooved tires come out to channel the water through the grooves for better traction.

    • @JollyRoger907
      @JollyRoger907  Год назад

      Dirt cars don’t run slicks, you need tread to grab! Or snow!

  • @TaterRogers
    @TaterRogers 2 года назад +1

    Oh man I love y’all’s logo! Please send me one of them shirts! 😅

  • @hphillips7425
    @hphillips7425 2 года назад +1

    Interesting. I noticed uneven angle runners. They look like 2” x 1” angle

    • @JollyRoger907
      @JollyRoger907  2 года назад +1

      They’re custom cut for the deadrise

  • @Ron_Masterjohn
    @Ron_Masterjohn Год назад

    What cubic inch is your motor? Have any idea what the boat weighs with and with out your motor? Glad I found your channel. Amazing these days how much water these jet pumps pump these days and blow it out .

  • @burningbridges9127
    @burningbridges9127 2 года назад

    I e watched the sport for years on u tube. Too awesome

  • @kweathman
    @kweathman 3 года назад +2

    Where can I find someone to build a hull for me

    • @JollyRoger907
      @JollyRoger907  3 года назад +1

      Are you looking for a race hull? Email me at Eric.usjsa@gmail.com

  • @thediyfamilybrubakers4054
    @thediyfamilybrubakers4054 3 года назад +2

    Didn't see you answered me . Did you build it your self . Or you buy the hull somewhere?

    • @JollyRoger907
      @JollyRoger907  3 года назад +5

      Yeah I’ve build about 7 sprint boats including this one

  • @mysterioanonymous3206
    @mysterioanonymous3206 2 года назад +1

    How much tuning and optimising are you guys doing to get the perfect setup? I mean, are you moving these inch by inch, is there a testing protocol, how does it all work?

    • @JollyRoger907
      @JollyRoger907  2 года назад +2

      Testing is tough as we can’t just go out and rip around a track without safety personnel. Most tracks open up for us one weekend in the spring. Otherwise I do small amounts of river testing. I just try to find a fixed point like a buoy or a stick to turn around. Once built, the fine tuning is in the fins and pump setup…I’ll do a video on that soon! Thanks for the question.

  • @dankasyanov488
    @dankasyanov488 2 года назад +1

    Where do you buy that paint .. currently building a boat but can’t find that paint anywhere

    • @JollyRoger907
      @JollyRoger907  Год назад

      My blue is called voodoo blue, it’s a Toyota color.

  • @trophbrwntrouthunter
    @trophbrwntrouthunter 2 года назад +2

    You were meant to meet cleeter, you’ve been saying “you’re done” years lol

  • @jamiemayer4297
    @jamiemayer4297 Год назад

    I know you’re a pilot. As a former US Army 19 D Cavalry Scout im thinking A10 Warthog lots of horsepower and maneuvering

  • @2tubesOtoothpaste
    @2tubesOtoothpaste 2 года назад +1

    very - very cool!!!👍👍

  • @billmadison2032
    @billmadison2032 2 года назад +1

    I saw your video about your mini jet boat. What treatment do you have on the bottom to make it turn so hard?

    • @JollyRoger907
      @JollyRoger907  2 года назад

      My personal mini turns hard because it’s a 14* Skookum-R with a larger reverse chine!

    • @billmadison2032
      @billmadison2032 2 года назад +1

      @@JollyRoger907 thanks

  • @bryanturner683
    @bryanturner683 Год назад

    Great video, but Im thinking ,,,, well the laws of physics is thinking you are incorrect on your theory about suction. Two issues, if you create a suction in front of the impeller you will get cavitation, for those following along, cavitation creates a low pressure area and when it gets low enough, the water will boil creating bubbles. (Water boils at a lower temperature in the mountains because of lower pressure.). When the bubbles reach the pressure side of the impeller they collapse violently creating little water hammers that will eat the impeller. Chip it away. Sounds like rocks going through the pump. Cavitation is bad berries for jet boats. Well pretty much anything. In the fire service we were required to keep at least 10 psi on the intake side of pump so we could avoid cavitation if another line was opened and flow increased.
    The other issue is if you are creating a suction you are not feeding the impeller all the water in can use so you are losing efficiency.
    I think the more likely reason for the boats sticking to the water is the water entering the rear of the intake is putting downforce on the intake due to its downward angle. You didnt show your intake but there is a place for one. Im curious if you have a shoe ( intake extension) built in to increase water flow to the impeller ( and bite into the water?). Pretty sure there's a point where the shoe gets too big and drag increases or your putting too much water in the pump. But Im not a drag boat guy so not sure??? It would be interesting to put a pressure port on the intake side and monitor intake pressure? I think when you clipped the bank you lost the pressure of the water against the intake and lost the downforce. You do great work!!!! Couple more thoughts. The mostly likely point to get cavitation is when you hammer the throttle to start. You would get cavitation everytime except for atmospheric pressure. A pressure gage before you start would read zero. But actually its 14psi at sea level. So when you jam the throttle, the pressure drops but doesnt reach zero, if it does you get cavitation. As your speed increases flow to the pump increases and pressure in the intake. Im probably off a bit on some of this, some drag boat or whitewater guys might chime in.

    • @JollyRoger907
      @JollyRoger907  Год назад

      Had to read that a couple times lol. Still pondering

    • @bryanturner683
      @bryanturner683 Год назад

      @@JollyRoger907 Im still pondering it also!! Not sure Im spot on???? Drag boat guys are talking about breaking intakes because of so much pressure. 50 60 lbs? Much higher speeds but I just cant figure out you are not reducing flow/pressure by having suction??

    • @bryanturner683
      @bryanturner683 Год назад

      @@JollyRoger907 Im still pondering also??? The drag boat guys are running shoes to pick up more water and loaders to funnel water to the top of the impeller to maintain equal pressure on the impeller and to keep the pump loaded. They have actually cracked intakes with too much pressure. running up to 55 psi I think? they talk about getting too much pressure and the rear of the boat lifting?? Watched a race video and I just cant see how the
      speeds you guys are running you dont have a fair amount of pressure in the intake? Do you guys run pressure ports to monitor intake pressures at all.??? Im still pondering?? Keep up the good work!!

  • @randalljames1
    @randalljames1 2 года назад

    noticed the bondo on the intake (anti cavitation?) and we did not see the grate (hmmmm secret stuff).. I ran a graphite spray on the sponsons of a drag hydro.. the finish of your spray is rough also? (very small contact patch on bottom of boat).. what kind of HP drives that 8" pump?

  • @xerolift
    @xerolift 2 года назад

    pretty cool. it's like the fan cars in F1 that got banned. they created a negative pressure under the car and pulled the car down to the track. hitting a curb would break the seal and lose all the vacuum.

  • @fredericrike5974
    @fredericrike5974 Год назад

    Tell us , Eric, have you found any substitute for lots of elbow grease and attention to detail in your success? Most of us are too bone lazy to accomplish that with a paycheck much less as a hobby! Loved the "Jolly Rogers Go To the Freedom Factory" and the lot of you, tbh. If you feel pressed for time or just "bossy, secretive" you could hand the camera to Bean, or one of your stalwarts to "carry the team"- because I suspect, a team is a big part of what gets you to there. Nicole's take should likely be edited before drop, but would be great fare! FR

    • @JollyRoger907
      @JollyRoger907  Год назад +1

      I find laziness creeping into my own builds and shop time all the time. It’s hard to stay motivated at times but the bottom line is I am 100% accountable to myself. If I want a fast, competitive boat, it’s 100% up to me to go get that. I think people’s biggest obstacle though isn’t laziness, it’s fear of failure. If you never try anything you’ll never fail and hypothetically feel good about one self. But I’m wired differently. The only way you’re going to achieve anything is to go make it happen…ie elbow grease!

    • @fredericrike5974
      @fredericrike5974 Год назад

      @@JollyRoger907 Short, sweet and fast, like the 907 boat. But you have nailed the biggest difference in how people are wired. Besides, winning on the first try only teaches you one way to win; failures, well parsed, can often tell you may ways to better your self, product and life. You just keep shooting for the win! FR

  • @fpvillegas9084
    @fpvillegas9084 Год назад +1

    How big of a factor is driver skill?

    • @JollyRoger907
      @JollyRoger907  Год назад +1

      A great driver can only do so much. You still need a string engine and overall race package. That being said though…a below average driver in a great boat will struggle. The top hosts are ridiculously quick and get harder & harder to drive!

    • @fpvillegas9084
      @fpvillegas9084 Год назад

      @@JollyRoger907 But i wouldn't bet my money on a bad driver in a great boat 🙄 ..... maybe in an endurance event, but not in sprinting. Well, just my opinion. 😁

  • @julioshaheen8386
    @julioshaheen8386 2 года назад

    What company makes those hulls?

  • @nomaschalupas2453
    @nomaschalupas2453 Год назад

    so if you drive over someone under water you will just see red behind you after being sucked into that hole.

  • @jj-zy6gc
    @jj-zy6gc 2 года назад

    Hear me out. I’m going to go out on a limb and say the steering wheel makes the boat turn. But I am not vesselologist.