Derby Talk

Awesome car! Can you cut out the center to cut weight? Maybe just router out the bottom and leave a thin top. We would first drill our axle holes, then, 5-Minute epoxied a 1/64" piece of plywood to the entire bottom of the block. We pressed it on as hard as we could to get all excess glue out....

Here are a couple of pics of his car this year.

Sent from my Note 5 using Tapatalk[/quote]



Sent from my Note 5 using Tapatalk

Here are a couple of pics of his car this year.

Sent from my Note 5 using Tapatalk

OK.. So most likely fenders would be out of the build... If you guys had to put in order the most important items that affect speed beyond what my son has been doing (Axle polish and remove burs/ridges, wheel prep and bore polish, using good tungsten weight placement COM/Cog, small body design, grap...

Total appreciate it to all... So far you guys are nailing the things we want to try... One more item to discuss... I see fenders on the fast cars seem to be hitting main stream... davet's car has them (nice leds). What advantages do you all see they really provide and how big does the body and fende...

How can you precisely remove the 3 crimp marks without getting at least a slight "groove" in the shaft? I would just say that your son took the marks off and you don't have a lathe, if questioned about an axle groove. Hopefully they allow the K-House slot so you can give them a twist when...

I just emailed the district coordinator and sent an image of the external "slot"... I agree with you that the rules were more for not affecting performance... This slot solely allows you to rotate the nail not change amount of surface area that touches the wheel. Sent from my Note 5 using ...

Unfortunately.. The rules state "You may Not... Cut grooves or make dips in the axle"... You might could argue that I won't be affecting the axle by cutting a groove in the nail head but I may need to get a clarification on that. The hardest thing I find is that once the nail is inserted a...

OK great.. Our next dilemma is to find a test track to consistently use in the Dallas area. Other wise all these new methods could work against us. Another question how or what tool do you guys use to rotate the axle/nails without ruining them. Whenever he pushed the nails in this year we need to ro...

I would agree with the logic of easing off of the CoG a hair and aiming for stability down the straight section. That said, you definitely want to make sure you have enough steer to keep you stable out of the transition, since a zig-zag down the straight will eat your time as well. I wouldn't go fu...

Hi derbypain! My thoughts about the cog for the two different track lengths are this. On shorter tracks and aggressive cog is beneficial because the car only has to travel a short distance. But for the longer tracks a less aggressive cog would be best..For making it a more stable running car for th...

My son's car made it to the district race today... We finished 2nd in the pack thanks to much of the forums advice and recommendations. My son is a Webelos II and has asked if we could build one final car for district. The track for district is 49ft vs the pack track at 35ft (both best track aluminu...

Thanks for the response. Mainly trying to raise wheel so it will not touch for the Pack race. My son and I had not considered angling the wheel for the 4 wheel race at district if that occurs.

Ok Great Idea! He and I haven't ever bent an axle...Any recommendations on how to bend one and where to bend it on the nail. Thanks Any other ideas please let us know. My son is a Webelos II this year so it is his last set of races. He has really put a lot of thought and sweat on the car this year. ...

New to the Forum and Looking for some opinions here: We won our pack last year but this year the rules have been modified to allow a raised wheel (3 on the floor)....but the district race is still planning to be 4 wheels touching. We plan to be part of district again but my son doesn't really want t...