Whilst thinking about making a new R/C version of our Bluebird K7, I called Simon at Protean Design to ask him about a little surface piercing prop he has supplied in the past for this model. In the past 380's have been used but i wanted to use a fastoutrunner to give it some real go!
Simon advised that this prop would work well at 20,000 to 30,000 rpm (its only little remember).
I looked through HobbyKings pages to try and find a suitable outrunner but got a bit dizzy trying to find one so I took myself off to Midland Helicopters next door to see what they had. They only sell good stuff because if it's for a helicopter you wouldnt want to put some cheap and untried stuff in it would you?
Mark, their man, can up with the following:
Black Widow 2204-18A 2300kv (CW)
Its a Quadcopter motor for 2-3S with a built in speed controller rated at 18amps.
2300kv on three cells, that 25,500 (ish) rpm.
Its 28mm in diameter and is very short (the magnets being less than 6mm long so it's lioh=ght as well.
Overall it's 18.5mm long and that includes the speed controller.
The shaft has a 5mm threaded prop mount so a simple adaptor will have to be made to go down to the 2mm diameter prop shaft I am using.
For small boats this looks amazing since its good stuff and since the speed controllers are built in, reasonable at £28.
The CW means Clock Wise and you can get the same item but Anti-clockwis so you can have counter rotating props too!
I have never heard of these before so I thought I would share it with you.
