Nutech Thunderbolt 2

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Well it was my throttle servo. Long story short, I have a gws to put in for now, and it's working fine with one bec. I should get to drive it. I'll get a couple 5745's to toss in though next. Scott... hey Scottt. put aside 2 5745's for me... in fact put aside 4 cuz I don't trust those servos much now and I have another car coming... LOL
 
Pipe, have you tried it with out the fail safe? thae fail safe used to make my servos glitch
so got rid and use the inbuilt 1 on my 4pk.......
 
I tried 3 different radios, and combos. ended up being the throttle servo. I had to do a detail today. ended up doing the full meal deal since it was sunny. had 4 hrs sleep, did that, have to unpack the car, eat, get 2 hrs sleep and go back to graveyards for 3 nights... this mild winter is crazy man. I don't usually book details until march april. booked 3 more jobs today alone. one day off a week is killing me... the graveyard gig we said we want more money. if not we said get another person in then to take up slack... I only wanted 2 days a week. this 3 on 3 off rotation is driving me nuts. body doesn't know when it's supposed to sleep anymore

ok enough ranting. tomorrow I will fix it. I jusy have to hide from the neighbour that wants her stairwell and hallway painted hehe
 
Both servos are toast. I did more testing today and found they draw enough power to make the light blink on the bec. I can put the gws on with a servo horn. lock the horn down to overload and no blink.... and the servo now out gets warm on the bottom in seconds. so it's not worth playing around... got 2 5745's for 140 cdn shipped. not worth chancing my new toy. I'll just get the vw back up and running. I have other toys to play with while I wait
 
Well I got kinda lucky today. I really didn't feel like working tbh. I went to my appt and they weren't home. Usually when they go out they leave the vehicle in one or 2 spots. I know where everything is and the dog is awesome. Guess they forgot... I never make it to the one hobby shop out there so decided to stop in.... they had 2 Hitec 5745 mg's in stock. Yoink (I'll save the other 2 I ordered for the GT5R).

I haven't done anything to the steering rod as above but I wanted to say that the stocker actually have to be careful. Now that I have full steering, the plastic rod end closest to the servo saver actually hits the dogbone now. I installed my Hitec 9745 mg's and just cut one of the aluminum incl servo horns in half for the steering side. at full epa it goes to just about knuckles hitting c hub. the Hitec servo horn is actually a hair longer than stock too...

So to go and play I am going to leave the stock one in and just shim onder the metal part of the ball end to lift it a tap. there's still a fair bit of thread left on the bolt anyway. If you are still running the stock steering rod, then I would look close. it actually puts pressure on the dogbone so for those that bent them it might just be for that reason


You can see what I mean in the pics here.
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looks nice pipe.

how did the steering problems start? is it because you want to run 2 steering servo's? Im trying to get my head around the problem but a little confusing which isnt out of the ordinary for me.

or do you think there is some kind of design fault there.
 
In the 2 videos above, the first is just idling. The second shows what happens to the servos. I am using a Castle BEC set to 6v. It can handle 10 amps. I use them in both my FG's and had one in the Redcat, The Firehammer etc etc... I like to use 3s lipos. They just last so much longer and no memory... anyway

when both servos get used at the same time, the draw was so heavy that even 2 bec's in parallel could not provide the power and they started twitching. I pulled the throttle servo out because I thought it was just one and had a gws to toss in. but it still did it with one bec and the gws. it didn't glitch with one servo but the bec light would flash....

it has zero problems with 2 Hitecs... and now that I put a flat nut under the steering rod, the plastic ball end now goes over the center dogbone and I have full lock. Until my cvd's arrive I increased the camber (well technically decreased I guess as it's now got about 2-3 degrees negative camber) and put half an earplug in each outdrive in the front. that was a fairly tight fit.

so if you get a Nutech, I would suggest pulling the servos and replacing them right away. I will just wait until tomorrow to get out as I had some other crap to do (and I wanted to watch the Canada vs Swiss hockey game. Swiss have a great team man and Hiller was amazing in goal for them).
 
thanks for the info pipe, if and when I get one I would change the servo's stright up, always do with the gassers.

u think one 5755 would run the steering ok?

looking at the pics I can see that steering arm would hit that centre driveshaft, im guessing you just tunred the EPA down to overcome this?
 
there was a lot of extra thread on the bolt, so I just added about a 2mm flat nut under the ball end on the servo saver side and now it goes over the dogbone. problem solved. I'll figure another linkage later without the bends.

I'll charge up the camera battery shortly. make sure I get some video. I'll just be hitting a big parking lot tomorrow. it's a hockey rink and never anyone at the one end. city guys have a fenced area they store stuff, otherwise it's a huge lot
 
I didn't get any video of the nutech today. throttle linkages were sticking a bit. I ran it around to warm it up with soft brakes... as soon as I started to get some revs I increased the brakes and that's when the issue showed up. I hadn't installed my kill switch so I stopped running. I'll have it tweaked nicely this weekend.

I will say it sounds great, very responsive and the braking is intense. it was rich enough to see liquid and the front end was almost lifting on pavement. I'll get back out in the next bit and actually film it. I had my new bike to play with too and was enjoying that until I hit a curb lol. also took my semi along. old faithful. usually starts first pull. I did have a wheelnut back off about 2 threads today...

well I better try and sleep. I had to deliver the rc and was a long drive. 5.5 hrs I have to be painting. 4 hrs sleep tonight oh boy
 
The throttle linkage had a kink in it and was binding the part that slides. I got it pretty much straight then took the files to it, then mover the collets around a bit. now it's working fine.

I also installed my kill switch and mounted the remote led in the fan shroud. I backed the bulb with shoe goo as well. I can see it nicely through the window there.

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ya I was just finished and unpacking my car (my painting stuff) went out. I had to sleep though bloody graveyards. I want to take it somewhere and ring it out a bit now... I have Wed and Thurs off, short job on Friday so I can get out to a bmx track this week. Saturday we will probably do some on road so I am going to go over the nitro bike in the morning.

trick is to avoid the extra work I have coming up now. I like money but need some playtime too... My goal is April now for my new PT Cruiser
 
great news pipe, im off to Bali as of Friday but ill have to jump online while away to see the vids of the TBII. shouldnt be hard to find somewhere with internet in Bali surley................
 
I'll make something to hold my mini tripod in radio hand better, even an elastic band would help. Unless of course I have someone along. Rich is up in Whistler doing security for the Olympics.

It's awesome. I remember not long ago I had to sell everything to buy my Redcat. Now I just sell when I have to make room for something else.
 
Hi Pipe,

How's this servo different from the one's you've got installed?

HS805BB Mega 1/4 Scale servo

The specs are more torque and speed, but is it made from slightly cheaper
materials?

Cheers
 
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