M12 maritimo

[bonewar]

Great job. The text for the resistors is for MGM controllers, for Hydras Castle recommends 1Ω resistor 2-3 watts. I am using 1Ω resistor 5watts with HV240, so far so good. no sparks and everything works ok. If using higher resistors such as the 60 Ω may cause the hydra not to arm properly, if i remember well.
If it arms ok with the 60 then no problem, but I think mine did not. then I put the 1Ω and OK

DISAR,

The text is for the Etti 200amp HV Navy ESC with the extra cap bank added.

I've tryed to email Castle 3 times about the resistors and they will not reply to my emails.

Thank you for the info on the hydra ESC .

Do you have any written documents from castle on the resistors or email you can show me.

I went with the 60 size resistors because of the size of the capacitors(3300uf-50v).
Because the capacitors are large the sparking affect will be double that of normal,
So not to fry anything i really need to use the resistors on the setup.

Cheers Bonewar

[CornelP]

I do not have the link anymore, but there was a web page with a small calculator for the resistor. It all depends on the size of caps and the time you want to keep it plugged in before attaching the main one (just the charging time).

[bonewar]

Resistors

OK,

I've had a re-think on these resistors.
I'm not going to use the 60 ohm resistors , like DISAR mention they will be to big for this application.

DISAR do you have extra capacitors on your 240?

The Hydra HV 240 comes with a total of 1440uf capacitors.
I will be adding another 6600uf capacitor bank to the ESC.
So the total of the capacitors on the ESC will be 8040uf.
There for the spark when connecting the ESC to the lipos will be double that of normal because of the extra caps.
I really can't see how a 1 ohm resistor will stop the sparking affect.

The ETTI 200amp navy ESC is rated to 60v and with the extra cap bank added has a total of 7000uf.
They recommend using a 20-50 ohm resistor to stop the spark.

I really need some help here. Any electricians out there .
Don't want to fry my 240.

Thanks people Bonewar

[old guy]

Hi It's me Does this help

http://scriptasylum.com/rc_speed/_nospark.html

Man was I looped last light when I was talking to you lol
Old Guy

[bonewar]

Thanks for that link Rick.
Some good info there!!

But unfortunately it has a warning about using there method (resistor wiring diagram) For the castle ESCs. Mamba max , mamba monster.
I wonder if its the same for the Hydra series of ESC.

I would like to ring Castle but it will cost me a small fortune for the phone call as i'm in AUSTRALIA.


Bonewar

[bonewar]

Resistors

I have been shown the light.

OLD GUY your a champion for pointing this out !!!

Thank you.

What was i thinking there was a thread right here at OSE.

All about Spark Arrestors.

http://www.offshoreelectrics.com/for...%22+Calculator

Thanks to DISAR as well for your answer.

Bonewar

[DISAR]

Sorry for not replying earlier, I was away. I do not have the links for the Hydras resistors, I will look for them now. What I remember is that I tried a resistor using that programs, don't remember how many Ωs, and the hydra did not arm! I removed the resistor and armed normal. I then looked around and found out that castle recommends 1Ω, 5 watts. It's working fine with that. I do not have extra capacitors

[ozzie-crawl]

maybe a little late but here is some info from mgm on spark arrestors has some basic guide lines.
go to this think and look at the third file down. http://mgm-compro.com/index.php?cat=...al-information

[DISAR]

Ok found it, post #8. Written from Mr.Joe Ford from Castle.
http://www.offshoreelectrics.com/for...light=resistor

[DISAR]

Yes the MGM info is correct but the size of the resistors is for the MGMs only. I also have an MGM 25035 and use 30ohms resistor (I think) and I tried the same one in the Hydra HV240 and it did not arm. then used the 1ohm 5 watt for the Hydra HV240

[ozzie-crawl]

okay wasnt sure if it was relevant

[bonewar]

OK,

Looks like ETTI uses the same text that MGM use for there ESC'S in regards to the resistors.

DISAR,
thank you for finding that thread.
I'm going to change the resistor for the 1 ohm 5 watt type.
And run it in line like MGM recommends.

Ozzie,
Thanks for showing me the text from MGM. Clears up where it originally came from.

Now to build this Master piece.

Bonewar

[Unkle Chopper]

I have been following this build since the begining and it just keeps going

keep it coming

[bonewar]

Unkle Chopper,

Mate i'm not the fastest builder.

I really like to take my time and build things right.
I enjoy building these cats as much as running them.
Here's where i'm up to.

Bonewar

[HYDROJERRY]

I agree with ya Bonewar, keep building, slow and low like a low rider,hehehe