My T-Maxx FLM Build!

[override]

Well last night I started up the T-maxx at the apartment to show some of my friends. I made a pass and brought it back to me to put it up and it just takes off in WOT. It slammed into my neighbors garage climbed up it and then flipped backwards going crazy. I cut my finger open trying to stop it and blistered my other finger plugging the exhaust hole to shut it down. I have a throttle return spring on it that was strong enough to pull it back to an idle, didn't work though. Luckily the zipties on the head soaked up the damage.

I pulled on the cord after I got it back into the garage last night to see how the pinch felt and the pull start cord won't return. I'm praying that nothing happened to it, I think its time to get a killer bee for it. This is the first time I have had a nitro go out of control like this. I'm still puzzled as to what happened....

 

[HPI-Killer]

Oh man what a sweet build brotha, I have been gone for a few days haha! That sucks to hear about your WOT take-off, hopefully your neighbor isnt a jerk wad.

 

[nikko508]

I had the same thing happen to me. If your using a AM radio any type of signal from a microwave or a police radio or a strong air wave signal will interfere with your radio. I changed to a FM 2.4 GHZ radio and all interface stoped. Also if your batterys in the radio are low it will do what happened unless you have a fail safe radio like a 2.4 GHZ.

 

[joshman1204]

I had the same thing happen to me. If your using a AM radio any type of signal from a microwave or a police radio or a strong air wave signal will interfere with your radio. I changed to a FM 2.4 GHZ radio and all interface stoped. Also if your batterys in the radio are low it will do what happened unless you have a fail safe radio like a 2.4 GHZ.

Failsafes do not protect against low batteries! The built in failsafe in the 2.4 radios is for loss of signal only. This is the reason every nitro rig needs a return spring or a killer bee setup. Even return springs can be hit or miss depending on the servo setup.

 

[wacmartin]

Don't you just hate it when your truck makes you look like an idiot in front of your friends. It happens to me all the time in front of friends that aren't in the hobby but show interest, then after that there interest goes out the window.

 

[nikko508]

Failsafes do not protect against low batteries! The built in failsafe in the 2.4 radios is for loss of signal only. This is the reason every nitro rig needs a return spring or a killer bee setup. Even return springs can be hit or miss depending on the servo setup.

Hate to tell you that a low battery leads to lose of signal, a 2.4 GHZ radio does center the servos in a low battery condition therefore it does protect agains a low battery and out of range and signal interference, better know as a FAIL SAFE.

 

[override]

I am running a 2.4 ghz setup, the Futaba 4PK...Last night after I finally got the truck stopped I found the battery lid and battery laying on the ground. I dont know if this happened prior to the crash or not. The battery had tire marks on it so I don't believe this is why it happened. Both the Tx/Rx batteries had a good charge.

I just informed the complex about the damages and they said it shouldn't be a problem that they will contact the people who live there and have them put in a work order to get it fixed. I don't think I will be responsible for any cost and to be honest I'm pretty sure the dent can just be pushed out and the tire marks wiped away.

I'm got the pullstart unstuck and the motor seems to still be ok, Nitro went everywhere when it flipped, it crawled atleast 2 feet up that garage door before it flipped and landed on its top.

Yeah they were laughing there asses off at me last night, I was like "f*ck I have never had one do that to me, its not funny"

 

[nikko508]

If your using a 2.4 GHZ I would check the linkage, make sure it's not binding also check the carb make sure its tight and it's not twisting on you. If your trucks battery fell off I can see it do what it did, make sure you have your linkage set up properly so it does close the carb incase of lose of power.

 

[joshman1204]

Hate to tell you that a low battery leads to lose of signal, a 2.4 GHZ radio does center the servos in a low battery condition therefore it does protect agains a low battery and out of range and signal interference, better know as a FAIL SAFE.

Ok well go test it and report back. Myself and several others on here have had runaways due to low voltage while using 2.4ghz receivers. I even contacted traxxas and was told that the failsafe in the receiver was for loss of signal and that the optidrive module was responsible for any low voltage failsafe. Since most of us dont run optidrive we basically have no low voltage failsafe on a traxxas rig.

This may not be the case with aftermarket receivers but with traxxas I can 100% verify there is no low voltage failsafe and your rig will run away on you if the battery fails.

 

[nikko508]

Ok well go test it and report back. Myself and several others on here have had runaways due to low voltage while using 2.4ghz receivers. I even contacted traxxas and was told that the failsafe in the receiver was for loss of signal and that the optidrive module was responsible for any low voltage failsafe. Since most of us dont run optidrive we basically have no low voltage failsafe on a traxxas rig.

This may not be the case with aftermarket receivers but with traxxas I can 100% verify there is no low voltage failsafe and your rig will run away on you if the battery fails.

I disagree, take your rig out,run it at wot and remove a battery come back and let us know what happens..

This is right from the Manuel, if you dontt know what your talking about about don't give out advice people asking questions are looking for a solid answer, I have given wrong info myself but when I realized I was wrong I retraced my response and apologized for my mistake..

The TQ 2.4GHz High Output's micro receiver fits easily into any vehicle, and features dual channel-1 outputs for easy installation in vehicles with dual steering servos—no Y-harness necessary! The integrated LINK button makes it fast and easy to bind the receiver, and the two-color LED indicates power-on and bind status for fool-proof control and convenience. Traxxas Link allows the receiver to recognize up to twenty TQ 2.4Ghz Traxxas Link enabled transmitters—just switch on and drive. In the event of signal loss due to an accidental switch-off or depleted batteries, the receiver will automatically return the throttle to neutral and hold the last commanded steering position. The Fail Safe programming is built-in and does not need to be set or activated.


Operate

 

[override]

To clarify.....

The battery lid and battery laying on the ground was from my remote not the truck, that is why I don't think it was the cause. I think it came off because I was holding the remote when I was stopping the truck. I grabbed the tire a few times and it kept slipping away from my hand, when I finally got a good hold on a tire I used my hand holding the remote to plug the exhaust, that is when I think it popped out.

The KillerRC bumble bee nitro failsafe is on-sale right now, I'm gonna go ahead and order one, get the ofna slider linkage kit to redesign the linkage setup and redo the linkage return spring. I will re-charge the Rx battery in a bit and see how low it was. I'm pretty sure it shouldn't be dead or low enough for this to have happened.

 

[joshman1204]

I plan on putting the killer bee on all of my rigs. The spot where I bash is next to some soccer fields where a bunch of little kids play soccer. It scares me to death to think about my XL running WOT through that field.

 

[Snook Man]

I would ditch that 2018 servo (if you still have it installed) for something better and work on the linkage & return spring.
I find no need for a bumble bee when the linkage and return spring are working correctly, it will just add to the mix of something else to go wrong.
KISS...

 

[override]

I ditched the servo before I ever ran the truck, that servo wouldn't let me setup the linkage correctly, it had trouble finding its end points and neutral. I now have a traxxas digital waterproof 2075 in it. It was one I had laying in my box from awhile back, works well and has plenty of torque.

 

[nikko508]

^ +1 ^ snookman

 

[override]

Well I left the switch on last night so the battery was completely dead...I plugged up my other battery and everything seems to be working fine. Guess I'll never know, exactly what happened.

Got the links and failsafe ordered though ;-)

 

[override]

I almost broke down and bought a waterproof Hitec servo yesterday but decided that the Hitec servo I am sending in for warranty repairs will replace the Traxxas 2075. I really want to stay waterproof because the fuel tank being there right next to the servo. Waterproof or not the Hitec servo will be better than the 2075.

So I finally got the stuff to re-do the pipe setup on the T-Maxx. I have heard so much about these damn ripple tuned pipes that if this pipe isn't better than the RDLogics "one piece" I was using I am going to be ! That RDLogics pipe was $60 and you can't just buy the header for it so pretty much that's $60 down the drain now.

So anyways here are the pics basically they explain what I did....

I am not sure performance wise how it will do, as you can see in the picture above the RDLogics pipe and the Ripple tuned pipe are damn near the same size. The rippled pipe though isn't tapered at the beginning near as much and is slightly longer and larger in diameter.

 

[nikko508]

I had that pipe and still have two of them, I would have given it to you, I hated those pipes, made for a hard tunning and very loud. Not worth the money, imo.

 

[override]

I had that pipe and still have two of them, I would have given it to you, I hated those pipes, made for a hard tunning and very loud. Not worth the money, imo.

Well damn....:\

Guess I'll keep an eye out for just a header to fit back on the RDLogics pipe, I wont get to test the pipe until next time I am home (2 weeks) cause I'm still waiting on the Ofna sliders to redo the throttle/brake setup.

 

[nikko508]

I run a buku pipe and love it, also you can check out ercm his pipes seam to be great with picco eng.