Stable 180 km/h build

[plinse]

Oh okay, that seems like a great way to do it! Only downside is that you need two sets of batteries I guess.

So regarding the earlier post where you said budget is the most important factor, would you have any ideas for a 2000-3000k build (Electronics)
And what would you do if budget wasn't a factor?

With unlimited budget I would go for an Exocet 150 from Kulz Custom made. These are the strongest hulls I know and there are great drives available:

https://www.ebay-kleinanzeigen.de/s-anzeige/exocet-150-no-mhz-mystic-no-hpr-no-hydromarine/1806863240-249-1596

This is actually a quite good price for what you get, less then 2 RTR Oxi boats and you get something really cool.

Very important is a look at the available lakes at first!

I hardly have any lakes here to do 180km/h. In winter there are some lakes but in summer there are people swimming and you don't want to take the risk of killing anyone. In summer the operation of such a boat is next to impossible here.

When having the intention of doing real high speed passes I calculate the boat to be capable of what I want.
If you choose to do it on a certain number of cells, just make sure you can reduce the cells reasonably.
6s1p for real high speed and 4s2p for bashing around is a quite good choice though.

With such an Exocet you can go for 12-14s for real high speed and 8-10s for fun.

There is a wide range of "speed" and "fun".

Make sure that you have a strong hull that covers the high speed ambitions.

This boat can exceed the 180km/h on 4s:

I can run it nicely on 3s, on 4s I don't have large enough lakes on a regular basis but in the video you see the flips/crashes. Hulls doing such speeds need to be strong enough for it. The bigger the boat is the more difficult it is to make it withstand the crashes.
There are only few manufacturers producing hulls that can do this for more then a very small number of flips, all the RTR boats are VERY limited there.

HPR shut down the business
Kulz Custom made only has a 1,5m Katamaran, no smaller ones

You need something strong in the size range of about 1 - 1,5m. Bigger boats have more true-to-scale behavior so in a crash they start to breake more often like the big ones

And these are about the only manufacturers coming to my mind when talking about 150km/h + and doing that for some longer time. Most people doing high speed runs reinforce or build their boats themselves.

Regards, Eike

[vvviivvv]

Yeah, I also owned a Exocet 150, sold it for a Hpr5008 very nice boat.

I believe the OP was thinking more around the 45" and below mark rather than 60" which a Exocet is.

regardless, there's plenty of electronics from TP / SSS with the right setup that would get you very good speeds for not a huge sum. a pair of MGM esc & some TP4050's would do.

I'm not sure what else is equivalent to top spec like Lehner, I believe Neu quality went down although I never had much luck with the 1521 series, it didn't work well with my Modelbaueregler ESC so I moved to Lehner and all my boats are Lehner powered.

[Iquentos123]

Yes that would be a great option, the only thing is that I would want to do it somewhat myself. I would just want the electronics capable of pulling the numbers you are. I am quite baffled as to how you do those speeds at 4s. 4 and 3s batteries are laying around the whole house so that would be convenient. And yes there are some quite nice lakes I can drive on here in Norway :) the only problem is that the good ones are so open that there usually is a lot of wind and waves but when it settles its the best :)

[Iquentos123]

Yes you are correct about my wishes for the size.

YES! Something like that sounds great, then I will look more into the TP motors and what lipos and props to use, then I have one complete option :)
But since I am already typing, do you have some ideas for props? Or would it be better to just go trial and error to see what is best?

Yes I was prepared for having to sacrifice some performance by not going lehner, as I have understood that they are at the top of the food chain. But that's all good to me.

[vvviivvv]

Which hull have you settled on?

I would start with some Abc / Ocutra X series in the 45-50mm range and go from there.

For lipos since you are in Europe - SLS are imo (and many others) the best my boats run the Quantum 65C packs which are genuine C rating unlike a lot of this misbranded Chinese stuff. they are responsible for many of the fastest saw passes.

[Iquentos123]

Which hull have you settled on?

I would start with some Abc / Ocutra X series in the 45-50mm range and go from there.

For lipos since you are in Europe - SLS are imo (and many others) the best my boats run the Quantum 65C packs which are genuine C rating unlike a lot of this misbranded Chinese stuff. they are responsible for many of the fastest saw passes.

Okay, would it be stupid to be going for bigger motors? Like 5060s or something from tp? Then I guess the prop would change too in that case?

What?!?! When you wrote the description of the lipos I was prepared to take up a loan, because they sounded expensive lol. But the price is amazing! Never buying lipos anywhere else if they are as good as you are saying.

[vvviivvv]

if you mean TP5650, then yes they would be overkill and heavy. I have a single mono that was doing 75-80mph with 1 TP5650, I have since installed a Lehner 3060 and it's running close to 90 with room for more when I have time.

twin 4050 would get you 100+ easy. can't comment on how reliable they are at repeat 100+ passes because I've never ran them.

and yes SLS lipo are really the bomb.

[Iquentos123]

if you mean TP5650, then yes they would be overkill and heavy. I have a single mono that was doing 75-80mph with 1 TP5650, I have since installed a Lehner 3060 and it's running close to 90 with room for more when I have time.

twin 4050 would get you 100+ easy. can't comment on how reliable they are at repeat 100+ passes because I've never ran them.

and yes SLS lipo are really the bomb.

Yes that was what I meant :) would it be more reliable or would it just be overkill for the sake of overkill? Damn that's fast for a mono.

Okey this is where the question above comes in I guess. Would want something that I know for sure would be reliable, but ofc that might be hard with a high speed setup.

Well that info alone is super helpful, thank you for being a great guide here man, and thank you for your time.

[vvviivvv]

I don't know if you'd physically fit a 56XX sized can in the sponsons of a sub 45" boat...

weight is also a big factor when you start going these speeds. I think you'd be more than happy with some 40XX series TP and some high quality ESC's.

The mono is for sale if interested :) I have a new twin mono project.

[Iquentos123]

Well yea you might have a point there, but will measure tomorrow for fun :) yea okey, will leave it to the guys with knowledge, I won't try to be a smart-ass. What kv option would I want? What are the best Esc brand options? Or what are considered high quality? Does hobbywing, seaking, hifei and ztw count as high quality? I'm guessing hobbywing is a no go lol.

That's a quite interesting offer, but sadly as I said earlier u want to build somewhat myself :)) but out of curiosity what do you sell for?

[vvviivvv]

Which hull do you currently have?

Somewhere 13-1600 KV if you are using 7-8s and want high speeds.

I don't have much experience with esc other than modellbau-regler and schulze, I do have a MGM, 2x turnigy Dlux modified and a few hobby wing seeking pro's for race boats but they are small slower boats.

MGM are high end readily available.

the Mono is a H&M no step4, reinforced hull and has a Lehner 3060, Schulze 40.160 power plant im looking for GBP1450. This boat will run 85mph all day long, I blew a cooling line (okay in December in the UK) and it still came back cool, I couldn't believe it.

[vvviivvv]

Just for example - there's a 72" cat running 150km/h+ with twin SSS56104, which aren't that much bigger engines than you are proposing to fit in a 45"boat.

I would really advise against twin 56 series motor in a sub 45" boat

[plinse]

Yeah, I also owned a Exocet 150, sold it for a Hpr5008 very nice boat.

I believe the OP was thinking more around the 45" and below mark rather than 60" which a Exocet is.
...

Well the OP starts the discussion with a performance definition and asks for open budget solutions.

When looking at the components available I would rather go for an Exocet using TP engines and ZTW300 ESC instead of going for something smaller and picking MGM. Value for money is poor on the MGM BUT the size around 1,15m is difficult to equip.
If you really want to go fast the ZTW200A are a little too weak, the ZTW300 are far too big and heavy and the MGM cost twice the money AND MGM defined to be benchmark when running them with Lehner. They do not have that target of supplying the best controllers when running them with "any chinese motor". MGM and Lehner is a binding combination for me. If I would be willing to spend the money on MGM I would also spend the money on Lehner motors. The other way around: If I know a good combination of Lehner motor and a different ESC MGM is not binding for me when using Lehner

My small red boat in the video is in the 75cm size-range. There are Lehner motors in it and 2 Flycolor 150A ESC.
That is a lovely size of boat and you can equip it with small budget BUT you need absolutely flat water as it is a small boat.

For me there is a big gap between <= 6s using Flycolor 150A ESC and bigger boats when looking for "value for money setups".

The ZTW200A are much more expensive then the Flycolor 150A and I don't think they can really handle 1/3 more current

When looking for value for money setups the ZTW300A is a good choice again, as you mentioned:

...
regardless, there's plenty of electronics from TP / SSS with the right setup that would get you very good speeds for not a huge sum. a pair of MGM esc & some TP4050's would do.
...

Partly true - looking for value for money I would skip MGM at first and several friends had problems running MGM with "more then 2 pole motors".
Going for quality starts with Lehner motors for me and only leads to MGM if there is no other good controller around

Spending money only partly scales with the size of the boat, it scales much more with the brands (?quality?) of the components in use. My 75cm Katamaran has more expensive motors in it then an Exocet on SSS motors would have. Then sum up that the Exocet would run on ZTW300 and the drives of my 75cm boat and the Exocet would need a similar budget for motors and ESC.

Of course a set of 4s LiPo is much less expensive but running them SAW-style also kills them quickly and the Exocet would run 12s2p also giving much more runtime.

...
And yes there are some quite nice lakes I can drive on here in Norway :) the only problem is that the good ones are so open that there usually is a lot of wind and waves but when it settles its the best :)

Big boats help to have fun on big lakes.

AND in the 1,15m range it is currently very difficult to buy strong hulls. You crack a hull and drown your components and we are not talking about budget any more
HPR does not produce any more and the quality of MHZ is changing from day to day, a friend just had to do severe repairs after the first flip of his Mystic 114 at only 120km/h, no comparison of that hull to a HPR 115. I have not heard of a HPR or an Exocet being damaged in the first flip just having had contact to water. If you crash in the bank you crack every boat, that is for sure but doing a flip at medium speed with a CAFK-boat in the middle of a lake? You can also go for a Zonda then ...

Just my thoughts on this...

Regards, Eike

[koen]

I have to say i am using Lehner motors now with ZTW esc's and it works perfect(and i have to say Lehner rules)

[Iquentos123]

Which hull do you currently have?

Somewhere 13-1600 KV if you are using 7-8s and want high speeds.

I don't have much experience with esc other than modellbau-regler and schulze, I do have a MGM, 2x turnigy Dlux modified and a few hobby wing seeking pro's for race boats but they are small slower boats.

MGM are high end readily available.

the Mono is a H&M no step4, reinforced hull and has a Lehner 3060, Schulze 40.160 power plant im looking for GBP1450. This boat will run 85mph all day long, I blew a cooling line (okay in December in the UK) and it still came back cool, I couldn't believe it.

I have one that my friend made for me, he knows his stuff so I'll trust the build heh.

Okey dokey, would you always want to utilize the max amount of volt the motor can handle for top speed?

Ok, it feels like if I would be going for mgm I could just as well pair it up with lehner motors. I will see, the build won't be happening until at least later this year, so I have some time to decide.

Wow, sounds very solid and the guy who ends up buying it is getting a great deal. If I was on the lookout for a mono I would deffo buy.