Sprintcat .40 - "Norm"

[Brushless55]

Looking good man!

[crabstick]

Ok finally got into pickup my strut.

Its overkill, but hey, our pond gets rough and I need it to take a beating, I have broken struts in the past.

Its an Insane gas sized skeg strut.

Just about to embark on polishing it then will mount..

[Simon.O.]

That is a heavy duty build you have going there Matt. Great for the Wattle Downs rough stuff ! I am a bit of a sissy and wait untill the pond at Pupuke is flat or close.
This NW weather we have is good to run at the Quarry.

I had a yarn to Kim today about you and she told me all sorts of things......just kidding.

When you have that OR powered beast up and running give me a call and we can meet at the Quarry and see how it runs. I am confident now that it will slap my cat !

Shoot me a PM with your mob# or txt me at 021 027 03185

Cheers
Simon.

[crabstick]

Gotta make it strong, with the new wall around the pond the way the cross chop bounces off the walls as opposed to the banks and a few boats in race water or open water it can really chop up, the skeg strut helps also cats track nicely.

I try not to run without a rescue dinghy after loosing a classic shovel with about $800 tied up in it for 2 years at hakanoa, so not so sure on Pupuke. At least wattle I can wade in there.

Strut is now mounted



Just about to make the strut bearing/stuffing tube etc, stuffing tube is annealing on the element as i type

[crabstick]

stuffing tube, and flex installed



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Prop is a 47mm and it just looks tiny lol

[crabstick]

Will try get home tonight in daylight to take some decent pictures, the camera on my blackberry is absolutely useless under artificial light.

Tonight's tasks are making a servo mount, polishing and mounting it and mounting the rubber boot on the inside of the transom for the steering rod.

I have a way of doing this that works well on my cambell shovel, pics to come tonight

[j.m.]

To find out how many poles the motor has, take the can off and count the number of loops in the wire.

Most high rpm outrunners of this size have at least 24-36 stator slots, but you can wing multiple slots into one phase. Not quite as efficient as a purpose-built stator, but loads cheaper. If you want higher rpm and more poles, you can rewind the motor with thicker wire going around only one stator tooth at a time (what's normally done). You'll need to find magnet wire that's around 16-14Ga though. Or use multiple strands of smaller wires like scorpion does. This is VERY difficult for a first-time-winder though. RCGroups has a lot of info about rewinding motors.


EDIT>> One guy in the HK discussion board says 8 poles. Seems about right...

Jon

[crabstick]

Thanks Jon, shes bolted in the boat now so I think im just going to run it..

Will hopefully test run on sunday at my club pond, Wattle Downs

[j.m.]

Well yeah, it's only a $32 motor...

[crabstick]

exactly!

[crabstick]

Some pics in natural light... Blackberry sucks donkey dork for pictures but you get the idea... HIHO SILVER!!

[Xfactor]

Cant wait to see it run . u know you will start a turnigy outrunner craze if this motor runs well @ 32 dollars

[crabstick]

It might just start a craze you never know

http://www.youtube.com/watch?v=SQdy2wNq_OM

Video of the outrunner spinning up, rpms were still climbing when it hit 24000 rpm.

Gotta love the sound of it, that was on low timing, thus the wee stutter at the start

[crabstick]

just noticed that the ESC program doesn't read rpm on spool down once you set the throttle slider to zero

[Xfactor]

Meaning what crab?