Mechanical Brakes - RC-Monster Forums

RC-Monster Mike · 03.04.2008, 10:39 AM

The concept I envision would be a hybrid setup - mechanical rear brakes only, with a mini or micro servo, mixed into the 3rd channel. You could use a smaller servo by only using the mechanical rear brakes, and you could still effectively adjust front/rear bias completely with your radio. The motor and speed controller would brake the entire diff, and the rear mech. would obviously brake the rear. If you needed more rear bias, you could dial(mix) in more rear brakes on the 3rd channel, or dial out brakes on the 2nd channel(controller brakes).
This setup would save some weight, add some space, allow electronic bias tuning without leaving the driver's stand, and take significant load off the speed controller and motor during braking. I think this would be the best compromise between esc braking and mechanical braking - lighter than pure mechanical brakes and easier to tune, and more tunable than esc braking alone. :)

Shark413 · 03.10.2008, 09:58 PM

I got the buggy out to the local track and ran several packs thru the buggy. The mechanical brakes worked perfectly, strong but with great modulation (feel). It made the brushless buggy handle so much better, my poor Kyosho 777 SP2 nitro buggy hardly got any track time. Having run this buggy with motor brake only, for a long time, all I can say is I would never run a 1/8 scale brushless buggy on motor brake again. The difference is unbelievable.

jhautz · 03.10.2008, 11:20 PM

I tend to agree with you on this mechanical brake thing. I made this mechanical brake setup to test the Tekno clutch system on the buggy. I didnt really care for the clutch iitself in the end, but I did really love the mechanical brakes. The mini servo has plenty of power to lock up the tires on any surface I've tested so far and it has much more feel and adjustability than any of the motor brake setups I have had.

I just preordered the new Xray XB808 buggy and plan to convert it right out of the box. This brake setup is going on the new buggy, but I am going to flip the dif back around and use a standard pinion setup rather than the clutch.

It for sure adds weight, but I do much prefer the feel, and the mini servo doesnt add that much weight and gets its power from playing with leverage on the arm.

Ignore the Rx pack. I put it on there temporarily while I was waiting for a UBEC to come in.

Shark413 · 03.11.2008, 04:05 AM

jhautz, that is one clean setup. I really like the innovative linkage you got there to run the mini servo inboard. Nice fabrication too. Yeah I was wondering what that extra battery was before I read your caption.

auto2 · 03.15.2008, 12:19 AM

my old stadiumm pro had mechanical brakes. saddle packs make it easy.

auto2 · 04.05.2008, 05:27 PM

i picture a custom built ( by mike) center dif plate that has the ESC in the rear near the motor and a mini servo in the front with a bell crank for the rear brake.

so how much and when can i pick it up? :-) ( im serious)

04.07.2008, 06:28 PM

ok heres what i have been up to, i got the neu spacer and modded it to clear the rear disk, i also did some dremeling on the rear brake pads, geared 13/48 for now as i am planning on trying my 9l in it(thoughts on this motor??2700kv,4s in a truggy)

got this in the mail today from mike, great idea jeff, and great work mike, i will use this one when i get a neu motor

**shark , your mount is cool, same basic idea, as for using these spacers, it works great and there are extra holes in mikes mount to secure it to the motor and then use 2 screws in the diff mount so it works great

thanks for the ideas guys , im sure this will be a great improvement over motor brakes, now i just need a mmm, and a neu 4s battery

jhautz · 04.07.2008, 06:42 PM

Looks good. I got my brake spacer from Mike on Thursday. I installed it over the weekend, but havent had a chance to post the pictures up. I'll do it tonight. It works just as planned.

04.07.2008, 11:41 PM

Quote:

Originally Posted by jhautz

Looks good. I got my brake spacer from Mike on Thursday. I installed it over the weekend, but havent had a chance to post the pictures up. I'll do it tonight. It works just as planned.

Which brake spacer????? Can't find it on Mike store..
Brake spacer or Neu front bell cover????