haagar

"Big hit" is an understatement.

wait a minute

iTrader: (6)

your suposed to stay between the boards not on the boards..lol

bsmooth

iTrader: (18)

Which type of bumber do you guys like? I see the foam one by Slapmaster and the Kydex one by CRC.

Thanks for any help.

-Steve

Scottrik

iTrader: (261)

I prefer the foam ones like the Slapmaster, Parma, etc. The Kydex certainly protects but it aborbs little or none of the impact, transmitting it directly to the screws. In a big hit (and, admittedly, BIG hits) I've seen the kydex bumper lever the screws through the chassis. The foam bumpers absorb impacts, though a BIG impact could still bring the chassis plate into contact with a barrier, etc and cause chipping or some such. Chipping doesn't usually impact utility of the chassis like screws pulled through does.

Scottrik

wallyedmonds

i like the Slapmaster bumper,works great.

bsmooth

iTrader: (18)

..Thanks guys. I went with the one from Slapmaster.

Also, I'm running IB4200's. Is there a trick to getting those into the battery tray without disassemblying anything? The picture on the CRC website shows it fitting without a jumper wire. I'm thinking I may have to split the pack and run a jumper wire.

Last, is there a site that explains what rollout is and how we calculate it for 12th scale cars?

Thanks a million for everyones help!

-Steve

Yankey

bsmooth: you gotta pop the shock...

Rollout is the distance the car moves with one rotation of the motor.

Rollout = (pinion/spur)*pi*tire diameter

The attached excel file works for brushed motors. We print them out on 11x17paper and get them laminated. Works great.

James

cookie1

could you update the rollout to go up to 47 tooth pinion and include a 74,76,78 spur.

I have a 17.5 and would to know the rollout without having to calculate. thanks

Yankey

cookie1: attached is the brushless edition you asked for...

bsmooth

iTrader: (18)

Thanks for the chart James. If I have to pop the shock everytime, will it wear the ball end out? Also, is there a special tool to pop it off?

Thanks again,
Steve

cookie1

yes it will wear. I usually add a o-ring or cut a small pcs. of fuel line to take up slop. Yes there is a very special tool I use. Needlenosie pliers.

Yankee- you are very smart. Where do you race?

Thanks for gear chart!!

Yankey

Yep. Needlenose. Just be careful not to bend the end of the shock body. Use the o-rings and replace the cup every once in awhile. You can do this too: http://www.teamcrc.com/crc/modules.p...ewtopic&t=1747

Cookie, I race in West Michigan. You?

Scottrik

iTrader: (261)

OR...follow Mark Payne's excellent advise on his blog and use the X-ray ball and eyelet. That way you use an allen wrench instead of needlenose.

cookie1

I race at the Gate in Cleveland. You coming to the classic?

jbsmith1

yes as people have said you could use Mark paynes Xray ball ends, or another idea i posted on CRC`s forum is a knurled height adjuster used for adjusting the height of the sticks on a Futaba radio. see attached pics.
http://i24.photobucket.com/albums/c2...Picture024.jpg
http://i24.photobucket.com/albums/c2...Picture014.jpg
http://i24.photobucket.com/albums/c2...Picture015.jpg
HTH

ah, i just see some one linked it,cheers Yankey.