785boats
04-17-2010, 04:42 PM
Thought I'd post the results of a few weekends of playing around setting up the 'Arowana' hull from R2 Hobbies.
The result is a reasonably priced Mid 40's mph boat.
Splashed a bit of paint on it (literally) a couple of stickers & this is the result.
The hull.
http://www.r2hobbies.com/eng/proddetail.php?prod=rcbt0028_hull_code
It runs a himodel 9Xl motor
http://www.himodel.com/electric/1845KV_Inrunner_Brushless_Motor_W_Water-cooling_for_Boat_5403674-09.html
A himodel GX200A ESC
http://www.himodel.com/electric/HiModel_GX_Seires_200A_4-8S_Electric_Speed_Controller_W_BEC_Type_GX-200A-BEC.html
Turnigy 5.8 a/h 25c battery.
http://www.hobbyking.com/hobbycity/store/uh_viewItem.asp?idProduct=10287&Product_Name=Turnigy_5800mAh_4S_25C_Lipo_Pack
Prop is an Octura X645
Strut, rudder & engine mount are from R2 also.
Flex is .150.
Trim tabs & turn fins are home made.
It originally ran nice & stable at around 45mph (gps) over 5 laps, with just one turn fin.
Then I decided to fill in the hooks at the rear of the hull & created an uncontrollable boat that just wanted to fly & flip, but reached 49.7mph. No amount of COG adjustment or strut adjustment or prop changes would bring it under control.
So with a set of trim tabs & a turn fin added to the left side it now runs like a boat should again. Not a world beater but a good solid performer. And cheap too.
Here's a few pics & a video.
Just thought I'd share.
Paul.
http://www.dailymotion.com/video/xcziax_r-c-mono_sport
The result is a reasonably priced Mid 40's mph boat.
Splashed a bit of paint on it (literally) a couple of stickers & this is the result.
The hull.
http://www.r2hobbies.com/eng/proddetail.php?prod=rcbt0028_hull_code
It runs a himodel 9Xl motor
http://www.himodel.com/electric/1845KV_Inrunner_Brushless_Motor_W_Water-cooling_for_Boat_5403674-09.html
A himodel GX200A ESC
http://www.himodel.com/electric/HiModel_GX_Seires_200A_4-8S_Electric_Speed_Controller_W_BEC_Type_GX-200A-BEC.html
Turnigy 5.8 a/h 25c battery.
http://www.hobbyking.com/hobbycity/store/uh_viewItem.asp?idProduct=10287&Product_Name=Turnigy_5800mAh_4S_25C_Lipo_Pack
Prop is an Octura X645
Strut, rudder & engine mount are from R2 also.
Flex is .150.
Trim tabs & turn fins are home made.
It originally ran nice & stable at around 45mph (gps) over 5 laps, with just one turn fin.
Then I decided to fill in the hooks at the rear of the hull & created an uncontrollable boat that just wanted to fly & flip, but reached 49.7mph. No amount of COG adjustment or strut adjustment or prop changes would bring it under control.
So with a set of trim tabs & a turn fin added to the left side it now runs like a boat should again. Not a world beater but a good solid performer. And cheap too.
Here's a few pics & a video.
Just thought I'd share.
Paul.
http://www.dailymotion.com/video/xcziax_r-c-mono_sport