Scott look at this
Hello Randy,
thank you for the links.
Has the motor a third ball bearing for the can?
The mechanical loads on the motor are much higher in a boat (when the boat is jumping) than in a ducted fan.
Additional you have huge torque peaks in a boat but in a ducted fan and also with an airscrew you have constant torque.
So if a motor works well in a ducted fan or with an airscrew - it is no guarantee that the motor fits the application in a boat.
Plettenberg outrunners and large Hacker outrunner motors have always a third ball bearing to avoid mechanical forces on the rotor. Such a third ball bearing avoid resonance effects and prevent a contact between the rotor can and the stator.
HINT: Plettenberg makes no outrunners for boats, because outrunners have not enough dynamic torque for the torque peaks!
Best regards
Ulf Herder
Schulze Elektronik GmbH
Prenzlauer weg 6
64331 Weiterstadt
Germany
At 75% efficiency its about 18k. It should easily get that kind of efficiency. Otherwise its a 2 pound paper weight.
Steven Vaccaro
Where Racing on a Budget is a Reality!
Well for testing sake, we can dictate the amp draw.
4500 watts divided by 37 volts is 121 amps. I understand its not exact, but its a start. Prop it for that and you should be ok. A regular eagle tree micro can handle that for testing purposes.
The guys that are testing it are using the hifei 200amp esc. I have the boat version on order.
Steven Vaccaro
Where Racing on a Budget is a Reality!
Edit: It was a Medusa item... no longer in service.
:::::::::::::::. It's NEVER fast enough! .:::::::::::::::
I am going to prop small and recharge after the run and see the amp draw. I will also be checking the temps to get it right on firday.
.NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s
I would also love to Build a Insane Gas Hydro with one of these motor, and run with the $1,000 mod gas motors on 10s, then go 12s to really make em grunt
.NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s
I ran the Motor in the pro Boat this weekend it ran great with a 455 prop in the 56MPH range and the motor was cold. I tried a biger prop a pitched up 460 it cavitated and needs a lot more testing . Videos soon it is up loading at this point.
For any one that needs a motor mount I do make them for any size rail.
Randy, were you running 10S2P?
Grand River Marine Modellers
https://www.facebook.com/search/top/...ne%20modellers
well i may have to try one on 12's in my bud as i only have 4s packs lying around here.... what size prop are we talking on 12s in the 1/8 pro boat?
they're the type that have to see it in person to believe
I got mine last week, installed it in my 42" Cat:
A few observations:
1) Big motor thats not too heay compared to some of my big inrunners I have.
2) Very large power wires (nice)
3) Poor solderability on these wires (not nice). It took a lot of the most corrosive flux I had and cleaning of the wires with a steel brush to make a decent conection .
4) Lots of torque when powered up compared to an inrunner, my cat (on its stand) started slowly moving across my workbench when I was messing around with the throttle.
5) Probably as a result of the torque, it takes a looooong time for the prop to stop spinning when I get off the throttle.
6) No nipples installed for the water cooling, I had an old SV27 controller and canabalized the ones off of that to used on the motor, had to have the holes on the motor enlarged slightly and tapped. Would be nice if they came installed. When you buy a water jacket for your inrunner, they have them installed, but not on this motor??
I'll post some pics later,,,,water trials are still about a month off (hopefully)
Overall, a nice piece of hardware.
Grand River Marine Modellers
https://www.facebook.com/search/top/...ne%20modellers
I think Steven is talking about Loctite
Axel
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