[PSUBS-MAILIST] Alan's thrusters

Mon Nov 2 15:25:10 EST 2015

Thanks for the video clip Glen,that beast was moving pretty quickly.  The shaft is 8mm inside the motor with a very slight increase in diameter where itmoves out of the motor. At that point there is a flat section for 2 grub screws tosecure it. Then it transitions to 10mm to fit the propeller. And there are a couple ofo-ring grooves as well. I have ordered a "follower" for my lathe to support the rodwhen machining as there is a bit of flex in it.It is an outrunner motor and the can is secured with a number of screws that arelock tighted in. Very hard to remove & I have stuffed threads drilling them out.It is a sensorless motor & most of the BLDC ESC manufacturers (like Kelly) that producecontrollers to operate from joy sticks, don't do much in the way of sensorlesscontrollers in that power range. There may be a way of mounting hall sensors to the inside of the thruster housing to turn it in to a sensored motor.I need 6 of these initially so it will be worth my while sorting the problems.I get them from either the HK International or Aussie warehouse.There is the Haswing Protruar brushless motor. Emile uses one & said the gearbox was a bit noisy.http://www.haswingmarine.com.au/Protruar-2HP-Electric-Outboard-Motor-Haswing-100lbs-.html
If you can hang off a bit, I will do the donkey work on these motors so you can see if it willbe worthwhile. I should have built the housing & done my in pool testingI by the end of the Month.I may be in the position to make some available later down the track.Cheers Alan

      From: glen brown via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Tuesday, November 3, 2015 5:04 AM
 Subject: Re: [PSUBS-MAILIST] Alan's thrusters

Thanks AlanExtended 8mm shaft that's easy. Heli ect only turns one direction I c what you mean a boat or car esc will work..Maybe a air res connected by hydraulic pipe to banjo coupling for mobility fitted on motor housing for comp.Did you get your motor from the UK?Glen ps videos are too big to send.
On Mon, Nov 2, 2015 at 4:04 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Glen,yes it is the Hobby King motor. but all is not straight forward. the easiest wayto adapt a boat prop when in a housing is to machine a new central motor shaft.It is difficult finding a suitable electronic speed controller. only the boat & some caresc's have reverse & everything is radio control. There are various functionsneeded to be programmed in to the motor controller & some adaptations need to bemade to run it off a joy stick. I may have to get an esc taylor made once I know themotor is perfect for the job & I have the stats on it. I have a helicopter / planetransmitter & apparently There are different transmitters for land based units.I am intending to oil compensate but with an air compensation method.I will be using either a relieving type pressure regulator set low, or a modifiedsecond stage regulator. so the air will be pressurising the oil to ambient. If the oilruns out I will still have air. I will experiment with oil & air.Any videos of your helicopter action?Alan 
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On 2/11/2015, at 10:31 pm, glen brown via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Alan Is it the same motor you got from Hobby King? the reason being I want to order one for my stern thruster.Yes we dart and herd capture in a boma using helicopter very dangerous work.Are you going to go air comp ?Glen
On Mon, Nov 2, 2015 at 11:09 AM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Thanks Glen,yes I'm using a low kv motor. I have tested it in a pool with a 2hp boat prop & it worked well. I didn't have a housing on the motor, just bare motorin the pool. I didn't  check the amp draw at the time. So the next stage is testingit with a housing.Sounds like you have been having fun. were you tagging the animals or something?Alan

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On 2/11/2015, at 9:04 pm, glen brown via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Hi AlanWell done with the ruga.Are you still planning on using that H King turnigy sk3 bldc and if so have you done any test with that prop yet.Been flying Heli's catching game for the last couple of months tense work,any case good to be on the ground and able to tinker on my sub again for summer.Glen
On Mon, Nov 2, 2015 at 4:04 AM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Hi Hank,I am waiting for an adapter plate from China so I can put a largerchuck on my lathe that will hold 100mm round aluminium bar.Then I can machine the housing. Have replaced the motors central shaft with a longer 316 ss shaft& mounted a propeller on it. Have it sitting in a vice on my kitchentable & am having fun powering it up.Am also making up a stronger jig to mount it on for in pool testing of thrust & amp draw under load.Cheers Alan 
      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Monday, November 2, 2015 2:39 PM
 Subject: [PSUBS-MAILIST] Alan's thrusters

Alan,How is your machining project going, got any pictures?  Hank
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