Unlimited Hydroplane Size does matter

[podagee]

Ok so if it's a stupid idea and I do get it going 50-60 mph it's a start then who's stupid now. It's an IDEA that's what a hobby is, try and try again, and if that don't work put a bigger motor. A boat that size I would love to see it going 75-80 mph than you wish you had it. I don't care for gas motors to much but if it comes to it then yes i'm going to put a 10 HP mini bike motor to it. hornet-50cc.jpg

[Brushless55]

Just for reference, the 1950's full scale 11.5 ft length "B Stock Utility" in my avatar
shown above weighed 320 pounds including the driver, gas and motor and it went
50 MPH with a 47 pound "Champion Hot Rod" 20 cubic inch outboard motor which
produced about 20 horsepower. Lighter weight hydroplanes with this motor went
about 54 MPH. This provides another size/weight/power/speed data point for your
performance estimating.

those are fun to watch today!

[daveives]

20 HP produces 50 MPH

Just for reference, the 1950's full scale 11.5 ft length "B Stock Utility" in my avatar
shown above weighed 320 pounds including the driver, gas and motor and it went
50 MPH with a 47 pound "Champion Hot Rod" 20 cubic inch outboard motor which
produced about 20 horsepower. Lighter weight hydroplanes with this motor went
about 54 MPH. This provides another size/weight/power/speed data point for your
performance estimating.

[Jeepers]

What a stupid idea. Just put an in-line gas motor or a Matha gas engine in that hydro, or stick to 1/8th Scale. Then those of us who have actually done it....... Can help you!

Jevmax why is that a stupid idea? Maybe the OP can't run gas/nitro at his local lakes anymore or at all, and has to do electric now so putting a gas
engine in would be a stupid idea..........

[Brushless55]

What a stupid idea. Just put an in-line gas motor or a Matha gas engine in that hydro, or stick to 1/8th Scale. Then those of us who have actually done it....... Can help you!

[jevmax]

What an extreme idea. Just put an in-line gas motor or a Matha gas engine in that hydro, or stick to 1/8th Scale. Then those of us who have actually done it....... Can help you!

[Brushless55]

I would talk to the guys that already build and race 1/6th scale hydroplanes they know what it takes to run boats in that size range, although a
1/5 scale is quite a bit larger.

here is a thread from Rum Runner Racing forums that talk about 1/7-1/6 scale hydro's and the power requirements that are needed to run these large boats. I would contact the them and start there for your project.

http://www.rumrunnerracing.com/feforums/showthread.php?t=29924&highlight=1%2F6th+scale+hydro

IMO IF I were to build a boat that large and wanted to do electric I would start contacting Steve Neu at Neu Motors and tell him my plans and see if he could come up with a custom brushless motor that would fit my needs, mostly because I would want the boat to be in the 100mph plus range.

That's a great idea Sean!

[Jeepers]

I would talk to the guys that already build and race 1/6th scale hydroplanes they know what it takes to run boats in that size range, although a
1/5 scale is quite a bit larger.

here is a thread from Rum Runner Racing forums that talk about 1/7-1/6 scale hydro's and the power requirements that are needed to run these large boats. I would contact the them and start there for your project.

http://www.rumrunnerracing.com/feforums/showthread.php?t=29924&highlight=1%2F6th+scale+hydro

IMO IF I were to build a boat that large and wanted to do electric I would start contacting Steve Neu at Neu Motors and tell him my plans and see if he could come up with a custom brushless motor that would fit my needs, mostly because I would want the boat to be in the 100mph plus range.

[jj2003]

Oh bro, I would love to see this hydro with that much power!

Not only see it but have it!

[Brushless55]

Just a suggestion Brushless, I have no idea how heavy a hull that size is. Seen one up close but never handled it. I would think you would need allot of room to get it up on plane but for something that size, who would run it anywhere else but on a large pond or lake?

Oh bro, I would love to see this hydro with that much power!

[jj2003]

LOL..
so you think 16 to 21 hp only gets 40-50mph?

Just a suggestion Brushless, I have no idea how heavy a hull that size is. Seen one up close but never handled it. I would think you would need allot of room to get it up on plane but for something that size, who would run it anywhere else but on a large pond or lake?

[Brushless55]

heck twin Leopard 5692 730kv motors on 10s each would kick ass in this hull!

[Brushless55]

The possibility exist's to run twin's with these http://www.mhz-powerboats.com/mhzpow...ca69eba01db02a

These are capable of almost 6000 watts continuous, with a max of 8000 @150 amps. Running on two 10 cell Nano-tech's, 1 powering each motor with two good ESC's would possibly get it up to 40-50mph. But of course the more hardware the heavier she gets. A single lehner is also a good choice but i'm sure it would be taxed pretty high unless the hull was very lightweight and speeds would be difficult to get in upwards of 40 unless you had allot of room and allot of mah's!

LOL..
so you think 16 to 21 hp only gets 40-50mph?

[jevmax]

I wouldn't bother with an electric drive train in a boat that big. There are lots of options
Gas engines that would move that hydro Use an X482 prop.

[JIM MARCUM]

You may also be interested in these new 5698 Leopards, avalable here on OSE for $219.99 with FREE H2O jacket. NOTE: 6500 WATTS

http://www.leopard-model.com/product/product_veiws.asp?id=1501&functionID=01020202

THX, JIM

PS: A hydro that large could run 2 of these to a single drive. Check our OSE forum threads on how to do it.