50/50 and 70/30 has been buggin' the hell out of me...

[BaronVonGareth]

...Why does everyone always use 50:50 for electrics, but on nitros, 70:30 favoring throttle? Why is this? Why do electric guys get more brake control and nitro guys seem to stab themselves in the foot on this regard? I've found 50:50 makes controlling my nitro's with a pistol radio so much easier as I can brake with much more finesse than just slamming on them...Are nitro engines really that hair-triggery that we need more travel on throttle to control them properly? With my stick radio, I'm using 50:50, no trouble gently easing around with that setup if I so desire.


Btw, no offense is meant to anyone who might take offense to this...this has been buggin' the **** out of me since I got my first nitro...I wanna know why 98% of nitro guys set their radios up this way, including RTR companies...

[SS Pede]

When I bought my Novak SS5800 brushless system I was instructed by the user's manual to run 70/30 throw on my transmitter. I assumed this was for better throttle control and I don't care much about brakes because I don't race. I didn't realize this was common with nitro vehicles.

[BaronVonGareth]

I have looked at probably hundreds of various RTR's in LHS's, and every single nitro had the Tx set 70:30, while the electrics had 50:50. Furthermore, the instructions for my T2DR said to set the throttle for that ratio if running nitro. I ignored this :P I need the fine brake control the extra throw there gives me, else I'll do endo's and lock tires up every time I hit them. :\

[Kuldeep]

Its so that when we get off the throttle, it kinda of slows down to a break.

Usually nitro's are much heavier then electrics, and its a good precaution to have a little break set.

[BaronVonGareth]

Its so that when we get off the throttle, it kinda of slows down to a break.

Usually nitro's are much heavier then electrics, and its a good precaution to have a little break set.

I've got mine set where I can trim in as much drag brake as I want(Up to the point of it doing an endo when you let off the gas, if I want), or as little as I want(0 drag brake and probably a 500rpm idle increase :P). Normally I drive with none, but if the binders are paticularly weak, I will throw some on to help control it better, and I'll use it to hold the truck still when fueling. I don't have any level places to stop it for fuel :P All the RTRs I checked had no drag brake in their linkages...

[thedarkness]

FYI the majority of electric rtrs can go backwards most nitros cant. Electrics use 5050 so they can got faster than a crawl in reverse, If your nitro is slamming and locking up the brakes they are set to strong IMO

[Ball Racing]

If you have a digital radio, pistol grip, and set the speed controller up to the transmitter, you get ALL the brake, and ALL the reverse thats possible.
Or for nitro, you may want more throw for the throttle servo in that range of motion, to fully open the carb,
and not need as much for the brakes to respond as needed.

And if you set-up your servos, and EPA right, it does not make itself a automatic drag brake. just because its 70/30

Not all radio's have the adjustment to make them 50/50.
Lots of timing in the electric motor is what makes them slow in reverse,
or a controller that is purposely made with a less brake current set-up or one that is adjustable.


If you use 70 percent of movement to control you car rather than 50, it has now 20 more steps of accuracy, that is there for the taking to have a greater linear control.

Just like if you set your dual rate lower ,or higher, but still use all the steering movement allowed on the radio to get all the turn allowed at that setting.

[Nightz]

because 70/30 is the winnar!?

lol seriously I could only think it has to do with the powerband of nitro engine characteristics. In that after you get clutch hookup, you still want some sort of resolution (whatever you have left) to control the power where as electric's power delievery it's pretty much linear.

70/30, 50/50, either way your servo will still get full travel (adjust EPA's). Heck some pistols you can change the physical hinge point to your own preference with varying ratios. I don't see why this moot point is such a big deal?

If anything, your vehicles are traveling in the forward direction MOST of the time, hence the bias to add more resolution to the control side your are using a majority of the time. If you have a problem with endos and what not then you need to either soften up your brakes initial bite or practice some finger control.

[rccardude04]

Usually electrics get 70/30 instead of nitros. I've ALWAYS set my nitros 50/50 because of the mechanical linkage. And with servos, you have a lack of precision compared to an ESC.

On electrics, the 70/30 works because you get a little more precise throttle control, where everyone seems to chop the throttle with nitro anyway so it doesn't matter a whole lot. Plus, with nitros, the brakes seem to require a little more finesse, instead of just setting up a drag brake like electrics do.

I'm not sure who told you 70/30 is for nitro and 50/50 for electric, because everything I've ever read is the opposite of that.

-Eric

[BaronVonGareth]

Usually electrics get 70/30 instead of nitros. I've ALWAYS set my nitros 50/50 because of the mechanical linkage. And with servos, you have a lack of precision compared to an ESC.

On electrics, the 70/30 works because you get a little more precise throttle control, where everyone seems to chop the throttle with nitro anyway so it doesn't matter a whole lot. Plus, with nitros, the brakes seem to require a little more finesse, instead of just setting up a drag brake like electrics do.

I'm not sure who told you 70/30 is for nitro and 50/50 for electric, because everything I've ever read is the opposite of that.

-Eric

When I bought my CEN MT2, it was set that way from factory, and every RTR nitro I've ever seen was set 70:30. Additionally, the instructions for my T2DR said to set it this way for glow powered models. Wierd. I use 50/50 and have no trouble controlling exactly my engine RPM or my endo's, which was a problem with the pistol radios I've had in the past.

[fastharry]

when I first started racing in 96, my futaba had a 70/30 option.,..then my next futaba did not( it's ben so long, I forget which one...) I remember calling tower, and hobby services asking why it did not...and got the answer because they wanted more throw on throttle because the rotary carbs would not open up, they had 70/30......On the newer models, they had increased the range of throw, so 50/50 worked fine....

I tested it, they were right...


since 98, I have never used 70/30...and haven't even noticed if it was there or not.....nitro or electric