MHZ Mystic 1380mm build

[keithbradley]

Kent,

Are you using anything as a means of disconnecting power from the outside of the hull?

[nata2run]

Kent,

Are you using anything as a means of disconnecting power from the outside of the hull?

Nope, not yet. I'm thinking of the magnetic connectors but not convinced.

[Chrisg81983]

Kent do u have a link to the ones u were thinking of using

[keithbradley]

Nope, not yet. I'm thinking of the magnetic connectors but not convinced.

Manuel said in another thread that the magnetic ones MHZ sell weren't water proof...that's a bit concerning.
I would like to find something nice. If something ever happened close to shore it would be worth it to be able to minimize the damage.

[nata2run]

Your only safe way is what doc is doing. Take the main power off, you have to brake the main battery connection and have 2 terminals through the hull that way it's definetly off. Not just connection to reciever.

[nata2run]

Manuel said in another thread that the magnetic ones MHZ sell weren't water proof...that's a bit concerning.
I would like to find something nice. If something ever happened close to shore it would be worth it to be able to minimize the damage.

That's why hesitant to get them. I don't recall they were MHZ? There was a mod or something to make them waterproof.

[keithbradley]

Your only safe way is what doc is doing. Take the main power off, you have to brake the main battery connection and have 2 terminals put the hull that way it's definetly off. Not just connection to reciever.

Is the MHZ one just rx connection? That would be pointless in my opinion.
I agree, you want to open the circuit with anything you use.

I've considered mounting bullets, but on a carbon fiber hull they would need to be insulated to prevent conducting through the CF.

[keithbradley]

This is the MHZ switch:

http://shop.mhz-powerboats.com/RC/Zubehoer-54/MPS-Schalter.html

[nata2run]

Sorry Chris, no link.....I saw it on a few German boats. I might not go down that path. Maybe internal fire extinguisher on channel 3-4? Just a thought LOL

[nata2run]

I found some serious powerhouses for the new hull: http://www.lightinthebox.com/skyrc-p...t_p385540.html

Could be ok if they hold up. If not scared, just buy and let us all know. Concept like the Lehner motors. Would be interesting to see if they hold up

[nata2run]

Is the MHZ one just rx connection? That would be pointless in my opinion.
I agree, you want to open the circuit with anything you use.

I've considered mounting bullets, but on a carbon fiber hull they would need to be insulated to prevent conducting through the CF.

Yeh it's an rx one, prevents signal to esc so it can't fire. But if your problem is on t he main, or after a crash, you feel safer that you can disconnect the main..

That's what doc has bullets through the hull

[keithbradley]

Yeh it's an rx one, prevents signal to esc so it can't fire. But if your problem is on t he main, or after a crash, you feel safer that you can disconnect the main..

That's what doc has bullets through the hull

My concern would be more centered on preventing a meltdown if an ESC fails. Pulling the RX does nothing to prevent that, so maybe bullets are the best way. I'm surprised that no one make something to open the connection at the battery.

[drwayne]

My concern would be more centered on preventing a meltdown if an ESC fails. Pulling the RX does nothing to prevent that, so maybe bullets are the best way. I'm surprised that no one make something to open the connection at the battery.

I went down that path of enquiry within Australian rules.
Any electrically operated disconnection would have weaknesses..
Rx wet sends wrong data ?
Flat/wet/shorted Rx battery wont power the disconnect or it's trigger.
The disconnects own battery fails.
Main pack shorts and welds disconnect's terminals closed..
ouch
We remained with the standard of deck plug set.

under CF decks I place a 1/4" nylon sheet as backing .. strong and non conductive... ( a kitchen cutting board is sacrificed to higher purposes ! )
around the female plugs through deck I use a plastic o-ring .. sits around the plug, ontop the nylon backing.. and CA in place.

Bullet proof ( excuse the pun )

anti-zap is always a nice feature when that zap will destroy plugs glued in the deck
deckplugs.jpg antizap-easy.JPG

I now MrK wont mine me hijacking his thread for a post... he hijacks many himself !

That's what doc has bullets through the hull

And yet people still forget to pull them out despite annoying repetitive reminders about safety and purpose.
Go figure..

[nata2run]

"And yet people still forget to pull them out despite annoying repetitive reminders about safety and purpose."

They should be there for your own good, so you don't go through the shredder and become fish food. Never assume people know your boat or the equipment running it. I myself have a habit of picking boats up from the front, so nowhere near props. I don't trust equipment, even with the power off. LOL

The day you forget the number 1 rule of logic is the day you get hurt! (Murphy's law is ther to get you)
I found that anything that can go wrong generally does go wrong sooner or later...

[drwayne]

"And yet people still forget to pull them out despite annoying repetitive reminders about safety and purpose."

They arethere for your own good, so you don't go through the shredder and become fish food. Never assume people know your boat or the equipment running it. I myself have a habit of picking boats up from the front, so nowhere near props. I don't trust equipment, even with the power off. LOL.

It's possible some people are just immune to common sense, hey ?