The Shipyard ( Dry Dock ): Builds & Questions > Lifeboats
Speedline Severn Class lifeboat
bobgrimward:
Hi Guys,
Could you help with a speedline severn class lifeboat.
I am coming to the end of the build and have ordered two MBA 850 motors too drive it. When they arrived they looked quite big too me and was wondering if they will be O.K. to use.
I intend to to drive them both from a 12v battery and they would drive two 50mm five blade props.
What do you think or shall I order some 60 motors.
Many thanks
BFSMP:
I think that the modern look on these big speedline boats is to put larger kv brushless motors into them, rather than brushed.
once saw an Arun lifeboat with 2 x 850's installed and it barely moved.
Jim.
boat captain:
look under the forum Lifeboats and SARs plenty of combinations depending on the scale of your boat.
nemesis:
it possibly had to big props on, hence the slowness, nemesis
nemesis:
sorry, just read the posting, 850s take amps and in my opinion 50mm props are too big. Try smaller ones and let the motors rev. I fell into the same situation with 850s on my Trent until I put smaller props on, then I got the performance that I was happy with, good luck, nemesis
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