Twin Hydro

[blackcat26]

Has anybody made a twin powered hydro? I have only seen those cheesy "NQD" brand.

[Diegoboy]

I don't think so. The twins will not give you more speed, but may reduce the amps, but it will be costly because you'll need 2 of everything. Considering the benefit doesn't justify the added cost, I doubt anyone has done it.

Now if you count gas riggers, there are a few twins.

[Jeepers]

I don't think so. I doubt anyone has done it.

Incorrect sir here is the build thread and video!

http://www.intlwaters.com/index.php?showtopic=35759&st=0&p=318890&hl=Schulze&fromsearch=1&#entry318890

FOR SOME REASON YOU HAVE TO SCROLL UP TO THE TOP POST!!!

[Diegoboy]

Wow. I'm glad I said "doubt". I guess there are some people out there that'll try just about anything (like a jet drive rigger or a twin jet drive cat)

[blackcat26]

I was wondering.....I know I have heard people on here say that twins are not faster but the twin Blackjack that Mudl build did close to 80 and I think Randy's Mean Machine is close to 75mph.

[Diegoboy]

I think the major reason for twins in any boat is for the "cool factor"

[blackcat26]

There is no doubt about that! I'm working on a Blackjack twin as we speak. Painted up like an Elam.

[Diegoboy]

There is no doubt about that! I'm working on a Blackjack twin as we speak. Painted up like an Elam.

That'll be sweet looking.

[blackcat26]

Would the Elam stickers be stupid looking on it? I'm still debating.......

[Diegoboy]

Would the Elam stickers be stupid looking on it? I'm still debating.......

"If do right... no can defend!"

It should look awesome if you do it right. Draw some designs down then choose the one YOU like best

[blackcat26]

Ok thanks. I'll try and start a build thread soon.

[Simon.O.]

Ok thanks. I'll try and start a build thread soon.

Get on with it !!
I have been thinking of a Twin-hydro for a while and the hull that was to be done is now retired, it is well past it.

Considering the top 1:1 drag hydros are twin propped there is no reason that we can not do a model.
You could do 1 motor per prop or do 1 motor 2 props via gear drive.

I'm watching have a 7xl and lots of wood ready

[Fluid]

The twins will not give you more speed, but may reduce the amps

Twin nitro riggers are a lot faster around the race course than singles - I've watched them plenty of times. Their acceleration out of turns is most impressive. Their biggest problem is the sketchy reliability of their glow motors - lose one motor and you're done.

A twin FE race hydro can have significantly more power and perfromance than a single-motored hydro. Right now an average of 175 amps is as high as current ESCs will handle reliably in racing applications. For a 4S2P/45C/10,000 pack that means around 2300 watts of power. Double the motor/ESCs and you get 350 reliable amps for 4600 watts of reliable power. This combo will run for 80 seconds and only use 80% of the pack - plenty for a race. Tell me that twice the power wouldn't give you more speed!

A wide heavy 34" P rigger with this extra power would dominate an oval course, especially once the other boats tried to match the twin's performance by increasing their amp draw....reduced reliability, advantage twin. This is the problem not limiting the number of motors in the rules creates - batteries may change, motors may change, boat lengths may change: but two is always greater than one.


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[Diegoboy]

Tell me that twice the power wouldn't give you more speed!


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Sorry Fluid. I was basing my opinion on the following post on RRR

It takes "X" amount of power to drive a given hull to a certain speed/performance level. If you have "X" amount of watts available from your power system, divided between two motors and props the extra drag of twin drivelines and the lower efficiency of smaller props means less power to the water and less speed. So from a performance standpoint a single wins. This is proven out with nitro riggers - the twins are no faster than the singles even though the twins have more total power (the twins accelerate better though). No twin rigger holds any SAWs records either, and some have tried.
Twins are cool, sound awesome, can eliminate prop walk and just seem to belong on scale boats. Singles are for pure performance - and lower cost and ease of building.

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[blackcat26]

All I know is that I have not seen many single motor boats run as fast as a twin setup. Not to say they are not out there but does anybody have a single Mean Machine that runs 75mph???