powering large boats with electric

[KartRacer]

Expresscraft
I totally get it.
And I still believe your in the right place. Many of the guys on this forum spend a lot of money on their hobby. I do too, probably not as much but it is all relevant. There are tons of folks out there with loads of money to spend just for the hell of it. I congratulate you on finding that market and working it.
My background is food business. Millions of people spend a buck or two for a burger. But thousands piss away $10 on them also. I am sorry I do not yet have the expertise to assist you as I'm on my first real build. Good luck and we'll be jealously watching as you work these high end customers.

[drwayne]

Please show pictures of the boat you intend to use.

[nata2run]

Without knowing your boat it's almost impossible to recommend anything. It's going to take a lot more than just guesswork to make it go 100mph. But spend some serious money on large equipment and it may get you there.......
If money is not an issue then here is a tip, get the big HV esc's, 10s "some what ever brand cells" and the 2028 700kv motors, install it and see how you go? Prop up and keep testing till you hit it or burn it? I understand you know boats, so you know better than anyone if it rides or not. The above setup is usually more power than you will need, but anything is possible and you cant compare to other cats. If your boats are right and the setup is right, chances are you will fly. If the motor is wrong or not fast enough, change to a different kv. That way you don't have to worry about new motor mounts and stuff.

[nata2run]

On a side note ppl may disagree, but what else can you do in a never tested FE setup? Start with a beefy setup and hope for the best? Having some big ESC's is good, as little chance you will cook them. Keep the motors in their nominated RPM range, and don't be unrealistic with prop choice.

[egneg]

I would think that a 2230 1Y on 12S could get you there. You should contact grail he does have the knowledge you need, the Platinum Princess is 96" and close to that speed ... but then again it cost about 20 grand.

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[TINY]

My shocker is now wet.;.... Need a diff hull i think, zero room in hull... all elecs and components, just sits on the props in a wheel stand wot. cog cant get further forward... Gotta love lehners , Vids next week when not windy.. 100mph not even pinned....... 37 inches of carbon on twin prop... 12s.. 50+ rpm.. runs cool..lol bens esc's are pretty good.. ditched the schultze for a pair of 300 amp jobs.. very happy, shocker needed alot more carbon though.. But i am pushing it well past it's purpose....

and drwayne,kent... cause we can :)

Not a thread highjack, just saw some buds on line.. cheers

[nata2run]

My shocker is now wet.;.... Need a diff hull i think, zero room in hull... all elecs and components, just sits on the props in a wheel stand wot. cog cant get further forward... Gotta love lehners , Vids next week when not windy.. 100mph not even pinned....... 37 inches of carbon on twin prop... 12s.. 50+ rpm.. runs cool..lol bens esc's are pretty good.. ditched the schultze for a pair of 300 amp jobs.. very happy, shocker needed alot more carbon though.. But i am pushing it well past it's purpose....

and drwayne,kent... cause we can :)

Not a thread highjack, just saw some buds on line.. cheers

Hello Justin, good to hear u/read again, if you got a spare shocker you can always donate to Shawn if he don't succeed in fishing his up? Get some vid and keep those Lehners spinning .....

[T.S.Davis]

Wayne's right. The 100 mph club is small. It's almost and art.

If he's serious about the 100 mark he's probably going to need lose the "budget" thinking entirely. Get the big Schulze beast controllers. Forget about the Leopard motors or the Castle motors. They might maybe could possibly get him there but the life span may not be great. If they fail they'll take components with them when they go.

Here's a source for Schulze. I hope Steven doesn't mind me posting it. He can smack me around later if he does. Look at the fut-xxl-40.334wk. They look like a small laptop computer. I'm suprised there isn't a fee just for looking at them on line.

https://www.icare-rc.com

There used to be some video on line of an HPR twin cat running a 120mph. Trying to remember. I think it was twin 3060 Lehner motors with Schulze 40.160's. Someone in Germany. Hopefully someone else will remember better than I.

[kingwrench]

Great advice from all, I am an engine builder, and a crew chief for professional drag race teams. The question everyone wants to ask is what is your tune, or set up. ANd the answer is there are no set up's that will work from one to the other, it may get you close, but getting to the magic number will take tuning, logging, trial and error. Allways only make one change, run it and see if it got better or worse. Keep after it. I chose the 600 kv motors for there torque and voltage requirements. I run 12s2p, everyone will say why so much battery, weight?. well like in a race car or boat, I built the boat as light as I could, less the batts. I built carbon battery boxes on adjustable sliders, so I can run 12S, or 12s2P and move my center of gravity where it best suited for the conditions. Like a race car build it light and hang the weight where you need it for the track conditions. With my combo I am seeing 26k rpm. I have the ability to run 15S if I want to go out and set this girl on fire. Right now I am having fun its a sold every day 90+ mph boat, with good battery life for 5 or 6 good long runs. Low amp draw and low temps. As far as investment I would say I well over 6k invested on this project.

[nata2run]

Wayne's right. The 100 mph club is small. It's almost and art.

If he's serious about the 100 mark he's probably going to need lose the "budget" thinking entirely. Get the big Schulze beast controllers. Forget about the Leopard motors or the Castle motors. They might maybe could possibly get him there but the life span may not be great. If they fail they'll take components with them when they go.

Here's a source for Schulze. I hope Steven doesn't mind me posting it. He can smack me around later if he does. Look at the fut-xxl-40.334wk. They look like a small laptop computer. I'm suprised there isn't a fee just for looking at them on line.

https://www.icare-rc.com

There used to be some video on line of an HPR twin cat running a 120mph. Trying to remember. I think it was twin 3060 Lehner motors with Schulze 40.160's. Someone in Germany. Hopefully someone else will remember better than I.

Come on, it's only a 60" hull, those Giant Schulze should run a real boat LOL, a few guys in Germany are running 3060 on 10s with Schulze 40.160 at well past 110mph on a 67". A good mid class European 200a ESC could make the 3060's struggle, so you don't need to ower power by miles.

[expresscraft]

the good thing is you guys are talking, I do not know his budget,we are at the point where i have e-mailed him back and forth, and he is supposed to send me start up money to begin his build, He may or may not do that, The info is still needed,and we are a lot closer now then a few days ago about having it out there,I do not want to buy parts with his money, knowing what he wants and not be able to deliver. so if its a 100 mph he is after, Im ok with telling him its a tall order.and the parts will cost this much. then if thats to much for him, we can back down accordingly.I am not ready to say yea I saw a guy do this on u-tube and run a 110mph with a 67" hull and I cant get anywhere near that.Now if this customer or the next does not want to spend that much on a boat that's a different story. And its ok.Dont get me wrong, i build plenty of budget boats,But if you don't know your way around the top end of things you will never be there.This is the gas boat I just finished and sent to the painters yesterday. it's a stock K-600 and ran just over 60 mph, with no weight added, the same type modded motor (s520) went 84 mph in our 50" thunderbolt, but we had 70oz of weight in the front to keep it down,This boat was 3000.00 tested and ready to go,He had a 450.00 deposit with our painter, I have no idea what they are doing from here.

[T.S.Davis]

Come on, it's only a 60" hull, those Giant Schulze should run a real boat LOL,

haha You may be right. Have I aged to where I've become too cautious. Maybe I've baked to many pieces over the years. There's a fine line between mature and paranoid I suppose.

Maybe I should get one for our retrieval row boat. Do a little skii'n betwixed heats.

[expresscraft]

I think the bigger hull will pack more air under the boat and have more lift then the smaller boat,so light will not be the concern, keeping it on the water will be the issue,and of course the power to push the weight needed to do that,the inline 520 is around 10-12 hp depending who is telling tha story, and the 50" boat is swinging a 3218 prop at 1800 rpms on a 26lbs boat,for the 84 mph speed.and 70 oz of that is weight in the nose of the boat.another side note:this is boat#2 the 1st one was fiberglass and was destroyed on open water, this project was the reason all of our boats are now built with carbon fiber,for today's power, in gas or electric, I think fiberglass has had its day.in the beginning the thunderbolt had some bottom changes done and a new mold to fix a very small problem the original design had, then after 100's where sold in fiberglass without issue, the s-520, quickdraw pioneer and the zen 29 all came out and higher speeds where now available to all, and so the need for a stronger boat came into play, Im really ok with change.also in gas that 80 mph mark is a big deal.

[Ken Haines]

Wayne's right. The 100 mph club is small. It's almost and art.

If he's serious about the 100 mark he's probably going to need lose the "budget" thinking entirely. Get the big Schulze beast controllers. Forget about the Leopard motors or the Castle motors. They might maybe could possibly get him there but the life span may not be great. If they fail they'll take components with them when they go.

Here's a source for Schulze. I hope Steven doesn't mind me posting it. He can smack me around later if he does. Look at the fut-xxl-40.334wk. They look like a small laptop computer. I'm suprised there isn't a fee just for looking at them on line.

https://www.icare-rc.com

There used to be some video on line of an HPR twin cat running a 120mph. Trying to remember. I think it was twin 3060 Lehner motors with Schulze 40.160's. Someone in Germany. Hopefully someone else will remember better than I.

I race a monster T-Mono 48" Rico. A fun boat to race :)
See the nice video Tony took of it at the 2012 nats. It is the big yellow boat.

http://www.youtube.com/watch?v=t-hJWinVuno

Takes a lot more than you think to push a 24 pound boat. I always believed we had unlimited power if we wanted it. That margin shrinks quicker than you think when you increase the size that much. 60" is a very big hull, could be that a cat is a little easier to push through the water than a mono. Not sure if your hull will be as heavy either ?
My advice is get a 41.300wk Schulze like Terry suggested. You will have to get a Nue 2230 or a Lehner 3080 ......I run the 7-turn in oval. a 6-turn or even a five turn their biggest motor is what you would need to push a boat that hard. I am actually afraid of my 5-turn, those esc's get pretty expensive if you start burning them up. They will not tolerate getting wet either as that will cost you the micro-proccessor and only Schulze can repair them.
25,000 to 35,000 rpm for oval 40.000 to 50,000 for SAWS. The big motors have a lower rated max rpm also that will have to be considered when choosing the motor. The Lehner has 2 choices of wiring configurations. You may be able to utilze the two configurations to run the same motor for SAWs and oval racing however I have not actually ever tried that.
Maybe Tyler has the charts and can answer those questions for you.
Hope I did not cloud the picture, just wanted to suggest that you go as big as possible if your customer wants to join us in the 100 mph club.
Good Luck,
Ken

[expresscraft]

Thanks guys I have relayed the info, so we will see what he wants to do.I have told him the 90 mph mark my be more of a reasonable goal.Now its up to him.