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are failsafes worth the money?

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hmm well i guess you will find out if you get radio interference at WOT into a curb eh?:marshall:
 
Easy to check if it has a built-in failsafe.

Turn your transmitter and receiver on then turn your transmitter off. If you have a failsafe, your throttle servo will apply full brakes. If it does nothing, then you don't have one.
 
I can't find anywhere in either manual which says the Revo comes with a failsafe built in. I would test it as robmob has said. Turn the tx on. Then the rx. Then turn the tx off. If there's a failsafe, the throttle servo should go to full brake.
 
tells you right there on the far right hand side, this section tells you which color of light means what. it says:reciever has lost signal from the transmitter, the opti-drive has entered fail-safe (throttle and and shift servos become unresponsive).
 
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Well, I see now where it says that. But that is so incredibly vague that I wouldn't trust it. There is no other mention of fail-safe in the manual. And it in no way indicates that the truck will be set to a safe operating condition if tx signal is lost. Sounds to me like it locks out the throttle and shift. But does it apply the brakes or will it just let the truck continue out of control?
 
Thats the way I read it too Candyman!!!! If you are at 3/4 to full speed what happens...lol...You will still hit that curb, car, wall, tree, or leg pretty hard....without the throttle engaged.


Hawk
 
i just found another page that says about the fail safe it says that when the truck is out of range it locks down and applys 25% brakes
 
Unless you have that front brake set on the brink of locking up...I do not think that 25% will slow you down fast enough if you have it running wide open....I know you said you were going to get one anyway....Follow your gut...I tested my OFNA today....First with the transmitter on the table and then I killed the power at the control during a run at around half throttle...It slowed immediately, stopped in about 1 sec and a half....I am sold!!


Hawk
 
Snipped from a current thread on the Traxxas forum;

For info on optidrive open Revo 3.3 owner's manual online ( adobe acrobat file " pdf " ) and do search for " fail ".

http://www.traxxas.com/products/nitr...33_own_man.pdf


Fail safe is described on pages:
12 of 48 ( left hand column )
15 of 48 ( right hand column )

If receiver battery goes low, optidrive enters fail safe mode

If receiver loses signal from transmitter, optidrive enters fail safe mode

In optidrive fail safe mode:

a. throttle & shift servos become unresponsive

b. 25% brake is applied

End snip ===

Sure, 25% isn't going to stop you on a dime but it is going to stop a complete runaway. If you are tearing around a track WOT with a pack of hungry "insert least favorite other truck here" chasing your tail and the truck applies 100% brakes because of a radio glitch then you are going to get stomped by everything behind you :) At least with no throttle and 25% brake you are going to come to a gradual stop in "fairly" short order are you not?
 
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i'd get one. i was happy i got one. got my savage on monday and did my 1st real bashing yesterday. i was having radio problems and lost signal at full throttle. the failsafe saved me no doubt about it.
 
for all revo owners: fail safes are stock and don't go out and buy a part you already have.
 
yeah fast eddie is rite, you got a 1000$ rc on the line hmm risk the rc or spend 20$? hmm thats a hard one... mabey i will just go buy 1/3 tank off gas for my real car lol....
 

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