Pacificmeister Build Info and CAD Sources


#265

Thread: ISO Metric Profile
Size: 40mm
Designation: M40x3
Class: 6g
Direction: Right Handed


#266

@morgansteven1970 I’m using a Naish Hover. I’m not sure if the mast is the same profile as the thrust.


#267

rogjalon i think the naish masts and components all interchangable.


#268

@morgansteven1970
Here is the Mast Clamp (Pacific Meister build modified for a Naish Hover Mast with 8awg cable slots.) Full credit to Pacificmeister for the design and Tylerclarke for the mod. This fits my Naish Hover mast perfectly.
I couldn’t upload here, so I shared on thingyverse. Here’s the link.
https://www.thingiverse.com/rogjalon/designs


#269

rogjalon thanks for that that is a great help


#270

@pacificmeister Hello!
What is the exact length of the aluminium tube? I measured 193 mm on Autodesk Fusion and that looks fine compared to what I measured assembling the different elements, but I wanted to be sure before cutting it.
Thanks!


#271

You should do a test fit to gauge how much space you need before cutting.


#272

Yes, highly recommend to measure your assembly before cutting. I had to cut a second tube because I was 1cm short… I didn’t anticipate the wire connections to take that much space, beware.


#273

Thank you! I’ve already done an assembly test but without connecting the wires, so I’ll check again.


#274

hi pacificmeister, i’ve seen in your last movie on youtube, that your board hase a safety switch with a leash around the leg. whats your solution or brand which you are using? do you cut the esc power? thanks for your help, may you can share the information.


#275

Correct, I am cutting the ESC power with this kill switch: http://a.co/1XoCnJE. Am not very happy with it though, ever since I added it I have remote trouble. And I got zapped when I touched it in the water… not sure what’s going on here, maybe the pins are exposed to the water inside the switch.


#276

pacificmeister, When you pull the leash the switch closes …is this then powering a Relay to open the circuit to disconnect the power to the esc


#277

No. When the circuit opens, the ESC stops “sending power” to the motor. We have trouble finding relays that can cut the battery connection, so at the moment, we only disable the ESC.


#278

[EDIT: Just realised that this is similar to what @MaxMaker is describing]

I just got my switch today. My plan is to use it to cut the signal to the esc or maybe set the signal value to constant zero. IIUC that will cause the ESC to stop. Needless to say, I’ll test that before connecting anything more than the motor…


#279

@pacificmeister: I remember to have have read something regarding Parker gearbox stripped for an unwanted stop/start at full throttle due to signal loss… Is there a way to avoid this, other than swap the Gt2b for a more sophisticated system?


#280

Another way to disable the ESC would be to set it to freewheeling instead of zero throttle. Freewheeling would eliminate most of the torque for the gearbox and stop the thrust from the propeller. I don’t know about all ESC’s, mine brakes the output shaft when a lower throttle value than necessary for the current speed is applied. Switching instantly from decent forward torque to maximum braking torque is probably the hard thing for gearboxes.
I think there are two very different safety aspects here. One is to stop the thrust if the riders falls. This is to prevent hitting the rider or anything else. The other one is electric safety for the user and electronics. This should prevent battery current from flowing to unwanted loads.


#281

@MaB I think that was throttling and reverse. Most of us have already disabled reverse and there is no braking available on the boat ESCs.

@Flo I’m not sure I understand. When would the ESC become zero throttle? My ESC default to zero throttle freewheel when the RC is disconnected. That is part of the safety feature on the receiver. With that said, there is still a massive amount of drag from a freewheeled prop on the motor and gearboxes we’re using.

Is there a reason why people don’t just switch the receiver power on/off?


#282

I can’t find exactly where but I remember something about the receiver loosing signal and then recovering but at full speed. Maybe I misunderstood.
My ESC (flier 200A) has a function “motor start” percentage, I still have to try but I wish it’s about start power from zero. It goes up from 5% to 100%


#283

Oh wow, so that means the lowest throttle is 5%? Its not the best, but I don’t think it’ll hurt the gearbox too much since power and speed is so low at that point.


#284

I have not clear if it’s about the throttle or the power at which the esc start powering the windings… Could be left on auto or set “to the lowest value at which the motor will start, by doing tests” says the user manual…