Fail-Safe unit dilemma

[Lockheed-21]

I need Fail-Safe unit for my Tamiya DF-02 and TA-05 chassis electric RC car models.

On eBay I have found some Nitro RC Fail Safe units at great price.

What makes the difference between Fail Safe unit declared for Nitro RC and the one declared for electric RC model usage?

Is it possible to use Nitro Fail-Safe unit on electric RC or not? By it's look and connectors I do not see any difference. Is there any?

[timie1]

I have asked around at my LHS, and they require a fail safe for running in their drag races for nitro, but when I asked about using a fail safe for electric, which I only have, they were very vague. It's like they didn't even know if I would need one for electric. I probed further and eventually I got it out of the LHS owner that you don't need a failsafe for electric because most ESC's have a sort of fail safe built in. So that is what I thought.

Have you experimented with the ESC? Try driving slowly and with the throttle depressed and some steering input, turn off the TX and see what happens. I'd advise doing it in a deserted area just in case. I tried this with my ESC's (mamba max and EZrun's), within about half a second, all power is cut and the car slows down.

Also many newer radios have a built in fail safe, in particular 2.4ghz and FM radios. You may not even need a failsafe.

[zueslilbuddy]

Well I have an Ofna micro fail safe and says nitro or electric.
OK I tried to use it on my Mamba Monster and it didn't let anything work after programing, this is before I figured out the MMM had one built in.
Same thing on my MM.
OK now the XL-5 esc which we know will runn off on you if a moth farts within 100 yards of it, it worked in.
As said above most of the newer brushless stuff has one built in.