just wondering... - RC-Monster Forums

ReV:-O · **just wondering... -** 11.03.2009, 03:15 PM

can an r/c buggy wheelie or do backflips?

I'm just thinking because the HPI Vorza is a buggy, but it has the MMM 2200 combo in it, which as we all know provides insane power.

Since its a buggy, it doesnt have a slipper clutch, right? so it's just direct drive, all the power from the motor is going to the wheels. I've been told buggy's dont wheelie, but how can this thing NOT wheelie?

cheers

brushlessboy16 · 11.03.2009, 03:19 PM

Quote:

Originally Posted by ReV:-O

can an r/c buggy wheelie or do backflips?

I'm just thinking because the HPI Vorza is a buggy, but it has the MMM 2200 combo in it, which as we all know provides insane power.

Since its a buggy, it doesnt have a slipper clutch, right? so it's just direct drive, all the power from the motor is going to the wheels. I've been told buggy's dont wheelie, but how can this thing NOT wheelie?

cheers

they can wheelie, backflips are a bit tougher to do because of the low center of gravity. gonna need thick center diff oil

junkman · 11.03.2009, 04:05 PM

lock the center diff, and they will wheelie no problem, most you see don't, becuase they are set up that way, to keep all four on the ground. Everything I run around the house has is locked, or semi-locked center. I just think they are more fun that way. For track use prob not ideal, and harder on parts.

skellyo · 11.03.2009, 04:08 PM

You can do backflips with a buggy, just not standing backflips on the ground. You can do them in the air over jumps though.

BrianG · 04:11 PM

Quote:

Originally Posted by junkman

lock the center diff, and they will wheelie no problem, most you see don't, becuase they are set up that way, to keep all four on the ground. Everything I run around the house has is locked, or semi-locked center. I just think they are more fun that way. For track use prob not ideal, and harder on parts.

lol, that's exactly how I have my stuff set up since I only bash around the house, or bash at the LHS track on non-race days.

My Hyper8 wheelies all the time when I want, and I have my CD with 100k diff oil. I was just today thinking about going home tonight and locking the CD on it for more aggressive driving.

ReV:-O · 11.03.2009, 04:19 PM

Oh right. I've never owned a buggy, only a Revo. I forgot buggy's have center diffs. I guess that kinda acts as a slipper clutch. But if its locked (how do you lock it?) wont the motor be really hard on the gears etc?

BrianG · 11.03.2009, 04:27 PM

Simple way to lock it is to use JBWeld inside the diffs. Very thick oil (200k-500k) can almost lock it, but still slips.

Not really like a slipper clutch, although the effect is similar. With a CD, it starts to wheelie and when the front gets lighter, power gets routed to the front tires. This reduces the power to the rear tires and the front doesn't go any higher. If you are really giving it a lot of power, this results in worn front tires, not to mention a lot of front tire ballooning. All this keeps more of the tires on the ground and offers better control on a track. Wheelies are impressive, but does get a little old when you aren't trying to do so.

On a track (bashing) I rely on the surface to provide slip.

jhautz · 11.03.2009, 04:51 PM

Another less permanent way to lock the center diff is to open it up, drain the oil and pack some silly putty in there. If you ever want to go back to a normal diff you just remove the silly putty and put the silicon oil back in it.

JB Weld is permanent.

Marvin · 11.03.2009, 04:58 PM

On my first brushless conversion (a Losi 8ight), it'd wheelie with only 7k weight diff oil in there. The smile on my face was huge. Until I realised that I had to turn it down as I'm a racer...

Finnster · 11.03.2009, 05:23 PM

Another important factor is the weight of the wheels. The inertia of the wheels provides the counter force to cause the chassis to rotate around the axle (ie wheelie/BF) rather than the mass of the axle to rotate (relative to the ground.)

Obviously traction plays a factor too.

florianz · 11.04.2009, 04:50 AM

In my truggy I have a torsen as a CD, and when hitting full throttle, it's no problem to do backflips (with a fresh battery): the torsen locks and sends approx. 80% of the power to the rear axle (where the max. grip is).

OT:
like that, on the track you need a sensitive throttle, but have no longer annoying balooning of front wheels. an other problem w/ 100k is that steering is worse (I used to drive w. 100k before the torsen). when the torsen is unlocked, steering is better then w/100k oil. overall, driving is different with torsen.

jhautz · 11.04.2009, 11:26 AM

I agree. With heavy diff fluid or locked center diff the steering is not as good. But in reality if he is looking for wheelies in a buggy then he isnt planning to race it so the steering will be fine for fields and parking lots.

The torsen is good option. Just an expensive option.

coolhandcountry · 11.04.2009, 11:36 AM

I have used hot glue to lock my diffs.
It cleans out with a little work afterwards as well.
Just a helpful hint on my end. :)

jhautz · 11.04.2009, 11:43 AM

Quote:

Originally Posted by coolhandcountry

I have used hot glue to lock my diffs.
It cleans out with a little work afterwards as well.
Just a helpful hint on my end. :)

Holy cow!!! A CHC Sighting!

Hows it goin stranger?

coolhandcountry · 11.04.2009, 01:25 PM

Where?
I heard he was a jobless bum that didn't RC no more.

Still got some RC stuff around.
Get the old Faithful Gmaxx out and bash it every now and then.