Model Boat Mayhem

The Shipyard ( Dry Dock ): Builds & Questions => Pleasure boats, Sports, Race, Power and Leisure Boats: => Topic started by: mattf1000 on December 17, 2014, 06:47:09 pm

Title: my surface drive mfa piranha
Post by: mattf1000 on December 17, 2014, 06:47:09 pm

I've decided to go all modern with my boat with these new fangled lipos and brushless  motors. My set up was going to be ic but it's noisy and complicated. I have a surface drive set up with a octura x640 prop and need some motor, esc and lipo  options. I understand  brushed motors and nicads etc but nothing about brushless. So any help would be great  cheers

Title: Re: my surface drive mfa piranha
Post by: Stavros on December 17, 2014, 08:49:18 pm

Where in North Wales are you from
 
Dave

Title: Re: my surface drive mfa piranha
Post by: mattf1000 on December 17, 2014, 09:02:22 pm

Flintshire mate. I've been messing with boats and cars for years. Built a f1 type tunnel hull from scratch out of balsa. That was really quick. I'll use the piranha  as a hack before I build another tunnel hull. And all the other projects I have plans for

Title: Re: my surface drive mfa piranha
Post by: Mad Scientist on December 17, 2014, 10:58:08 pm

FWIW, when North Wales was mentioned, I thought of Component-Shop. They have added brushless motors to their product line. Inrunners and outrunners.

Tom

Title: Re: my surface drive mfa piranha
Post by: mattf1000 on December 17, 2014, 11:14:53 pm

Yes I heard of them but need to know what to get. I've no idea what size motor will work with that prop

Title: Re: my surface drive mfa piranha
Post by: Stavros on December 18, 2014, 08:50:05 am

40mm racing prop might be to much for a brushless motor BUT i will stand corrected on this one
I would suggest
 
 
 http://www.hobbyking.com/hobbyking/store/__18229__Turnigy_D3536_9_910KV_Brushless_Outrunner_Motor.html (http://www.hobbyking.com/hobbyking/store/__18229__Turnigy_D3536_9_910KV_Brushless_Outrunner_Motor.html)
 
and this
 
http://www.hobbyking.com/hobbyking/store/__15133__Hobbyking_SS_Boat_Series_125A_ESC.html (http://www.hobbyking.com/hobbyking/store/__15133__Hobbyking_SS_Boat_Series_125A_ESC.html)

Dave

Title: Re: my surface drive mfa piranha
Post by: mattf1000 on December 18, 2014, 08:55:06 am

Diameter: 1.57"(40mm)
 Total Pitch: 1.6x1.57=2.512"
 Shaft Size: 3/16
hope that helps

Title: Re: my surface drive mfa piranha
Post by: Subculture on December 18, 2014, 05:01:12 pm

If it's surface drive you're going to a need a bit of revs aren't you?

Title: Re: my surface drive mfa piranha
Post by: mattf1000 on December 18, 2014, 05:08:00 pm

Spoke to Prestwich Models today who recommend a 1200W  1900 KV motor, 120A esc and 4s lipos. So hopefully will make quite a nippy little boat