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James's Electric Speed Boat Build

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Old 07-08-2013, 07:47 AM
  #1
gt monster
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Default James's Electric Speed Boat Build

Hi all,
OK, so it's taken me a while to get my boat build off the ground after sourcing most of the parts almost 4 years ago! Just needs some assembly for which I need some advise... and a nice paint job.

My proposed setup -
Mono hull (1 meter long Shallow - V)
Neu 1527 / 1y brushless motor
8 cell Lipos
Castle Creations 240Amp Hydra Ice ESC
M445 Octura prop (Advised starting prop)



Hull


Hull - Underside


Hull- Rear


Hull - Above Plan View


General Components


Internal Components


External Rear Hull Components



Please can someone advise me with:

1) How many batteries I can safely install into the build without stressing the motor batteries and ESC? The batteries are 5800mAh 8 cell 25C. I'm looking to get performance and run time. Each battery weighs about 1.1kgs. I'm presuming that they need to be installed as centrally to the lowest position of the boat as possible?

2) Do I need to put an S-bend in the brass tube that houses the flexible shaft and surrounding nylon sleeve and should the motor be as low as possible in the hull??

3) I'm looking to sink some water inlets into the underside of the hull for cooling. Where is the best position to get greatest water intake... Am I to presume that the greatest water contact is to the rear of the boat at the lowest point of the hull?

4) Can anyone direct me to any set-up pics or pics of their installs please?


Any help or advise would be greatly appreciated and welcome.
Thanks

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Old 07-08-2013, 02:59 PM
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NobodyFamous
 
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Default RE: James's Electric Speed Boat Build

I am not builder or expert but. . .

1. don't bend the drive line (brass tube) in an S, just give it a gentle curve, less is better.  Mount the motor on an angle in the boat so that the drive line shoots through the bottom of the transom in the bottom of the hull.  The slight curve will straighten out the drive. (I'll see if I can dig up a pic)

2.  the water inlets must be on the "wet" part of the hull - the further back the better.
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Old 07-08-2013, 05:33 PM
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Default RE: James's Electric Speed Boat Build

That is one beautiful boat!!!!!
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Old 07-09-2013, 05:41 AM
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gt monster
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Default RE: James's Electric Speed Boat Build

Thanks Nobody and Mikeup.

Pics would be really cool please Nobody.



5) Based on my set-up, please can someone advise me what speed this boat is going to be capable of approx. I'm sorta scared by the figures I'm getting from the on-line calculator @ - http://www.radiocontrolinfo.com/RCca....php#Brushless

This boat is going to be faster than my r/c cars ,and more like flying my rc planes if am correct with my input of information!

Motor - 1527/1Y - 1,250RPM/Volt - 60K Max RPM - 2,250 watts
Prop - M445 Octura.
Lipo - 8 Cell Lipo - 29.6V
ESC - Castle Creations Hydra Ice 240A
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