Atomic Carbon CR2 takes Benelux Championship win!

V-Rossi · #1 10-03-2010

This weekend Wouter Wijnen, Steven Verelst and I used the CR2 for the first time in a National (we have a combined series of Belgian and Dutch drivers) @ Charleroi, the first National of the year.

Not only did Wouter take TQ, all 3 of us made the A final, and the infamous Willy from Kampenhout qualified 20th out of 47 drivers (became 16th after the finals).

Wouter took a very deserving win by taking 2 out of 3 qualifiers, something he would repeat during the finals to take home victory for Atomic Carbon.

With us using the CR2 and Freud the S2, 40% of the A final was Atomic Carbon

(Wouter 1, Steven 6, Jorg 7, Freud 10)

Results: http://www.myrcm.ch/be/bbrc/07032010...WT2/index.html

V-Rossi · #2 10-03-2010

Hmm problem getting the pictures in

http://picasaweb.google.be/bnkoffroa...CharleroiBBRC# here they are

Thanks to cooper for the nice photos!

Gayo · #3 10-03-2010

Well done!

Now we need setups

V-Rossi · #4 10-03-2010

Front:
Blue spring, 30wt, black piston, 2mm limiters => tower #1, wishbone #2
-1,5° camber, no lead or brass bulkhead, 1 washer added under steering ball stud (adds Ackermann)
Camber links 2-A, 2 washers*

Rear:
Red spring, 25wt, black piston, 0mm limiters (AE rod ends, 1 turn unscrewed) => tower #2, wishbone #2
-2° camber, 1° anti-squat, camber links 2-B, 3 washers
Rudebits brass plate, 70gr lead under lipo (rear half of lipo slot filled with lead), 30gr extra lead around motor.
Long wheelbase
Wing: low and to the front

Gearing: 8,5T on 25/78 on new motor plate

*Wouter used 3 washers, Steven none, I used 2, adjust to your own liking

Tyres: front Schumacher Stagger Rib, rear Schumacher Mini Spike Yellow, the team used Mr.O and KWF inserts, used Losi ones are good too (the softer inserts made the car easier to drive).

Gayo · #5 10-03-2010

OK, thanks. I have a few questions if you don't mind

Quote:

1 washer added under steering ball stud (adds Ackermann)

Well I found the opposite

With the "new" steering (with a rack), there is really little to no ackermann (front wheels are parallel when turning) and adding washers made it worse... May have to re-check that though.

Quote:

Red spring, 25wt, black piston, 0mm limiters (AE rod ends, 1 turn unscrewed)

Are the black pistons track-related (harsh landings)? Or is it you new standard setup?
Also, why the AE rod ends? More droop?

Quote:

Long wheelbase

How do you mount rear arms? Swept back or forward?

Thanks!

flipside · #6 10-03-2010

Quote:

Originally Posted by Gayo

OK, thanks. I have a few questions if you don't mind

Well I found the opposite

With the "new" steering (with a rack), there is really little to no ackermann (front wheels are parallel when turning) and adding washers made it worse... May have to re-check that though.

Are the black pistons track-related (harsh landings)? Or is it you new standard setup?
Also, why the AE rod ends? More droop?

How do you mount rear arms? Swept back or forward?

Thanks!

Black pistons indeed for landings, but they also make the car very stable while turning. Since the astro was new and very grippy, this helped a lot to stabilize the car.

AE rod ends indeed give more droop.

What do you mean with rear arms? Wheelbase was set to long.

Personally I also made a mod to the front hubs. I dremel off some material so I can mount them more forward. So in fact I have a wheelbase adjustment in the front. Making the wheelbase longer in the front results in less wheelie effect, keeps the front flatter, adds stability. In fact you are making wheelbase longer, and at the same time you get more weight % on the rear wheels. Like it a lot :-D

Losi is short compared to B4, and very short compared to X6, so a little more length doesn't hurt.

super__dan · #7 10-03-2010

Quote:

Originally Posted by flipside

What do you mean with rear arms? Wheelbase was set to long.

.

Not sure why I'm in this thread but anyway, Losi arms are offset i.e. non reverable. The old ones had an L or R on them and the new ones 1 pip or 2. I can never remember which way round but it effects the wheelbase by a few mm's.

flipside · #8 10-03-2010

You secretly admire the cr2, that's why!

Ok, I think I have arms mounted in the standard way...

Gayo · #9 10-03-2010

Quote:

Originally Posted by super__dan

Not sure why I'm in this thread but anyway, Losi arms are offset i.e. non reverable. The old ones had an L or R on them and the new ones 1 pip or 2. I can never remember which way round but it effects the wheelbase by a few mm's.

I was scratching my head, thinking in how to put that in english worlds

So thanks to both

super__dan · #10 10-03-2010

Lol, it's important as it makes a difference to driveshaft angle as well

Gayo · #11 10-03-2010

So, what is the standard way of mounting those arms? Shorter or longer WB?

flipside · #12 10-03-2010

I guess short otherwise the shafts will point towards the rear which isn't good.

But simply check the CR manual and you know which way around you have to mount them.

Gayo · #13 10-03-2010

I just checked the online Cr manual, it says that 1 dot is for the left and 2 dots is for the right side. So this is the long setup.

I wondered why my car was at the 65/35 weight split without any lead weight, but I mounted the arms backwards, with the shorter wheelbase, more weight being on the rear.
Well, another thing to try.