Twin Hydro, is it possible?

[Brushless55]

I have a question for you guys..
has anyone built a twin Hydro before?
and will this work well?
I'm just about to buy a hull to have my first twin, and I love the look of gas hydro's and thought could this work on this hull.....? :huh:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=350298354065&_trksid=e11014.m204&_trkparms=algo%3DSI%26its%3DI%26itu%3DUCI%26otn%3D 8&ssPageName=ADME:B:WNAFP:US:1348
http://i703.photobucket.com/albums/ww39/filmmaker2009/XhydroH2.jpg
http://i703.photobucket.com/albums/ww39/filmmaker2009/XhydroH7.jpg

[titan29]

Nice a twin hydro would be sick! DO IT lol .

[Brushless55]

well I've seen twin Cats and someone on here has done a twin Mono, I would hope this works on a Hydro...

[Xfactor]

Why not? are you gonna set it up for course running (RTO) or sport?

[Brushless55]

School me on RTO ?
My thoughts are sport...
I would like to try twin 10XL's on 5s
But I've also thought about a single big 1000kv motor on 5s in parallel and have the same rpms as a gasser, so I could use gas prop?
So 18-19,000rpm with a big prop may be a good way to go..
All input is welcome

[Xfactor]

Right turn only

[m4a1usr]

Why not go with a proven race hull before you try an unknown? The Stryker 2 and the Aeromarine Thunderbolt have a solid history of racing performance and they are the same price as the Chi hull. Aeromarine has the Chaos too but the price is a bit higher. Or if you could find a Performance International but chances are most ones available are going to be used. A twin hydro? I'm all ears. :popcorn2:

John

[Meniscus]

I'd do a search on the forum. I seem to remember D. Smock addressing this subject.

[Xfactor]

Is my math wrong or is that a 20 pound hull? 9000 grams. It would be nice if you could see the bottom of the hull. But if its 20 pounds the one big motor better have it esp if youre going to run a gas prop. Id tell you screamer but doesnt seem to be enough data yet on gas props on the screamer at a lower s rating. So Id be leaning towards the 1900zr neu or some other big hog. No matter what youre gonna pull some amps.

[Xfactor]

I like the zippkits too. That always gives you the option of changing some things around different cowls etc.

[Brushless55]

Is my math wrong or is that a 20 pound hull? 9000 grams. It would be nice if you could see the bottom of the hull. But if its 20 pounds the one big motor better have it esp if youre going to run a gas prop. Id tell you screamer but doesnt seem to be enough data yet on gas props on the screamer at a lower s rating. So Id be leaning towards the 1900zr neu or some other big hog. No matter what youre gonna pull some amps.

The weight they have listed is the shipping weight..
I think race ready gasser is about 12-14lbs?

[Brushless55]

Why not go with a proven race hull before you try an unknown? The Stryker 2 and the Aeromarine Thunderbolt have a solid history of racing performance and they are the same price as the Chi hull. Aeromarine has the Chaos too but the price is a bit higher. Or if you could find a Performance International but chances are most ones available are going to be used. A twin hydro? I'm all ears. :popcorn2:

John

I think this hull is a Gen2 knock off?

[Rumdog]

Hey, If people are successful with twin riggers, a twin hydro is definately do-able. I say go for it!

[Brushless55]

Hey, If people are successful with twin riggers, a twin hydro is definately do-able. I say go for it!

Awesome :w00t:
help me pick a hull and the motors

[Rumdog]

http://www.aeromarinerc.com/index.php?page=shop.product_details&flypage=flypage_images.tpl&product_id=211&category_id=67&option=com_virtuemart&Itemid=53

[Brushless55]

I was just on that site looking at that one and the Chaos :biggrin:

[Xfactor]

whats the size

[Brushless55]

They are around 45"

[Shooter]

Sounds cool Todd. Can't wait to see it!!

[titan29]

Todd that aeromarine thunderbolt it is an awesome hull. i had one with a Toxic AL full mod zenoah. 65 mph plus and it was on rails! theirs a vid on you tube with one with a 2230 and it is sick!!! just make sure you let Remy know it will be for electric so he can do a light lay up.

[Brushless55]

Thanks man, so maybe twin 1515's on 5s could rock!

[BHChieftain]

What about running two motors geared to a single drive shaft/prop?

-Chief

[Brushless55]

What about running two motors geared to a single drive shaft/prop?

-Chief

who makes a gear box that can handle this?

[Simon.O.]

A twin hydro is more than possible. It should be done.
Twin Cats are so yesterday :tongue_smilie:

I have done a lot of reading on this subject and have started a few good discussions on the topic.

Here is how I see it.
A twin Hydro is deffo for acceleration and the very cool factor. If you want a very fast circuit racer then a single may be better.
I do not race or really do circuits as the pond I frequent is quite narrow at one end so it it better to do SAW or drag type runs.

I am keen to do a twin hydro type build too and am working on a hull style now.
It will deffo be a 2 sponson and prop(s) rider. If effect a conventional hydro with 2 props.
The plan view of the boat will be odd but the concept remains the same.

Twins
For a given hull, especially a proven design, it is important to know the optimum power setup and if possible a prefered prop size and rpm.
From there it is a fair bit of hit and miss as far dividing the whole lot in half.

Twins will be heavier for a given power output.
Twins may move more water given that we may be able to move more than 2 halves of a larger prop, assuming that we run 1/2 optimum (single motor) power each side.
Acceleration could be insane !! I hope so.

Looking forward to seeing more of your ideas. :thumbup1:

[Brushless55]

Ok, then help me in picking out some motors to run 5s..
http://forums.offshoreelectrics.com/showthread.php?t=14861
thanks for all the great input!

[Xfactor]

who makes a gear box that can handle this? You make your own with some flanged bearings l-stock an some robinson racing gears or order gears from BERG

[Xfactor]

Anton X went that route and ended up going to the 2230 single you see on youtube in the aeromarine talk to him. I truly think youll be happier with a single neu or try that 52 red leopard.Half way through the build youll be ready to throw her in the water but youll have alot to do with twins. Plumming,wiring ,etc.

[Xfactor]

No matter what route you take have fun.Great project.

[m4a1usr]

I think this hull is a Gen2 knock off?

Did you ever decide if this was the hull for you? I found some guys who are running this setup with big gas motors and doing very respectable. Seems the hull is a sleeper to most of us.

John

[Brushless55]

Did you ever decide if this was the hull for you? I found some guys who are running this setup with big gas motors and doing very respectable. Seems the hull is a sleeper to most of us.

John

So you friends are running gas in this hull?
I think I may go with a Cat being this would be RTO
and they do sell a Cat to
http://i703.photobucket.com/albums/ww39/filmmaker2009/tsunamiH7.jpg
but this Hydro is sick! :rockon2:
http://i703.photobucket.com/albums/ww39/filmmaker2009/DSC01987_0.jpg

[m4a1usr]

Thats a badass looking hydro! Hmmm,.......

John

[Brushless55]

I think the hull with hardware for a twin build was over $800, and that's with one color on the hull

[Diegoboy]

HERE (http://forums.offshoreelectrics.com/showthread.php?t=13672) is the other twin hydro question thread for those interested...

[Brushless55]

Thanks Diegoboy! :beerchug:
anyone want to contribute to the Twin Hydro build :spy:

[Xfactor]

Mhhh!those are some phat hulls

[Eodman]

I love twin drive Cats ----- a twin drive Hydro would be awesome!

My only input into this project is to consder the size of the hatch. The bigger the better during the build process!

[Brushless55]

I love twin drive Cats ----- a twin drive Hydro would be awesome!

My only input into this project is to consder the size of the hatch. The bigger the better during the build process!

So I have more room to work?

[Gerwin Brommer]

Twin, inline , in a PT45, ...............

[Brushless55]

Twin, inline , in a PT45, ...............

A twin in a PT45! :w00t:
There is a guy who I think still has one of those hulls for sale and he lives not to far from me...

[Gerwin Brommer]

Read again : INLINE !
:-)

Haven't seen that anywhere yet............

Or, to stay within reasonable budgets : the new 21, with the improved hatch.
Hm, inline outrunners........................................ ....................

[Brushless55]

Read again : INLINE !
:-)

Haven't seen that anywhere yet............

Or, to stay within reasonable budgets : the new 21, with the improved hatch.
Hm, inline outrunners........................................ ....................

Uh twin inline? :confused2:
and the 21 with a single Castle 1515 on 4s will rock

[Gerwin Brommer]

Twin : two motors coupled inline.
the axles connected.

Never seen the pics of the German 2.33 mtr catamaran with 2x2 lehners coupled inline ?

[Brushless55]

I have ..
I'm not looking to spend BIG cash

[Gerwin Brommer]

nope. a twin inline or 2 seperate drivelines,
You save on axle, strut etc .
I was thinking of outrunners because of the short cans.

[Xfactor]

Two motors geared to one shaft. The cheapest is a single setup hands down so u kinda gotta decide your poisons.

[Brushless55]

Two motors geared to one shaft. The cheapest is a single setup hands down so u kinda gotta decide your poisons.

Who makes a sweet trans? :confused2:
two 1515s on 5s run together to one shaft could be sweet

[Xfactor]

fdm made a single gearbox. You gotta have randy or someone put it together for you with some stand offs L stock flanged bearings and metal gears . Let me ask you this how will you sync the motors? The sensorless brushless designs might cog against one another if running two seperate esc. If someone overseas has that setup they might be using closed loop function of a shultze. To accomplish this feat.?????????

[Brushless55]

Trans is just a thought..
and the cost of that may be the same if not more ,than to just run twin drives..

[Xfactor]

Anton X treid it with two kbs and said he kept burning up speed controls but I think shockerman had great success from twin kbs in his cat so i dont know.Alot of the guys on here lean away from the kb's I havent had any problems with mine although its only been run twice but the balance and bearings were a-ok. I have a clip of one pushing my 12.5pound scale about 35 on 9s 1p so two of them on on 10 or 12 s lipo with some 450's might do some real damage. I had no water cooling(not recommended) or anything. Great testament to the motor I feel. Its like any other motor it will fail for sure if you dont know how to properly select a prop based on your rpm but mine turned a k460 x457 k454 k450 all with no problem but remember i stepped down to 9 s lipo to do that. My calculations call for a 1750 on that motor on 12 s they cost 44 dollars so thats why I tried one. Two of those medusa long cans might do it or the long ammos.

[Xfactor]

Anton X treid it with two kbs and said he kept burning up speed controls but I think shockerman had great success from twin kbs in his cat so i dont know.Alot of the guys on here lean away from the kb's I havent had any problems with mine although its only been run twice but the balance and bearings were a-ok. I have a clip of one pushing my 12.5pound scale about 35 on 9s 1p so two of them on on 10 or 12 s 2p lipo with some 450's might do some real damage. I had no water cooling(not recommended) or anything. Great testament to the motor I feel. Its like any other motor it will fail for sure if you dont know how to properly select a prop based on your rpm but mine turned a k460 x457 k454 k450 all with no problem but remember i stepped down to 9 s lipo to do that. My calculations call for a 1750 on that motor on 12 s they cost 44 dollars so thats why I tried one. Two of those medusa long cans might do it or the long ammos.If crabs turnigy shows out twins might be an option for that motor too.

[Brushless55]

I'm thinking of the new Leopard 4074 motors..!

[Xfactor]

My thoughts exactly brushless but why not the red big boy?6.5 plus hp per motor.

[Brushless55]

My thoughts exactly brushless but why not the red big boy?6.5 plus watts per motor.

That big 5692?
if we could find a price I would like to try it, and I would only need one :biggrin:

[blackcat26]

Who makes a sweet trans? :confused2:
two 1515s on 5s run together to one shaft could be sweet

Forget the tranny bro do a true twin! Where in the world did you get this idea anyway?:laugh: I'm gonna do a twin pro boat formula or I have an old beater miss vegas to use for the project......:spy:

[Brushless55]

Forget the tranny bro do a true twin! Where in the world did you get this idea anyway?:laugh: I'm gonna do a twin pro boat formula or I have an old beater miss vegas to use for the project......:spy:

I'm with ya bro! :rockon2:
I wonder if two Leopard 2200kv motors will be enough for this biuld :confused1:

[blackcat26]

Not sure. Have you noticed how much their logo looks like the clothing and shoe manufacturer Puma? Kinda funny. It's ok since their ani-mule is jumping to the other side....

[Brushless55]

Not sure. Have you noticed how much their logo looks like the clothing and shoe manufacturer Puma? Kinda funny. It's ok since their ani-mule is jumping to the other side....

I dig Puma shoes :thumbup1:

[blackcat26]

I have all kinds of room in my vegas but the proboat formula/elam would be very cool......