Search found 17 matches

by Black Fox
Mon Mar 17, 2014 5:46 am
Forum: General Topics
Topic: Weight Placement
Replies: 38
Views: 48509

Re: Weight Placement

Yes, Black Fox, the 2nd picture with the weights close together is similar to how I taught my boys to do it. Also, Speedster is right. Cut off the extra wood in back (if allowed by your rules). We do that. We use a craft stick as a front wing, epoxied in (2-part 5-minute epoxy) for strength, instea...
by Black Fox
Sat Mar 15, 2014 7:06 pm
Forum: General Topics
Topic: Thanks All
Replies: 0
Views: 15703

Thanks All

Thanks everyone for your help. My son and I both took first place for speed in our pack. http://i220.photobucket.com/albums/dd264/blackfox-111/3ca060db8f470231048820862dcdfdf8_zpse051a0e0.jpg My son's car is in the middle and mine is on the left. The car on the right is the same car design he built ...
by Black Fox
Tue Mar 11, 2014 11:34 pm
Forum: General Topics
Topic: Packing Graphite
Replies: 1
Views: 4453

Packing Graphite

Gents I came across a web site that sells a tool for packing graphite into your wheels. If you're running in a race where you're not allowed to lube your car between races. They claim packing the axle whole in the wheel will make the graphite last longer, thus allowing your car to run faster for a l...
by Black Fox
Sun Feb 16, 2014 2:37 am
Forum: General Topics
Topic: Weight Placement
Replies: 38
Views: 48509

Re: Weight Placement

Gents Thanks for all good info. However, I have to admit that the closer I get to physic equations, the more my brain hurts. It works better for me if I can see something. So I've added some pictures to help. First are some pictures of the track we are using. Unfortunately I don't have one that show...
by Black Fox
Sun Feb 16, 2014 12:10 am
Forum: General Topics
Topic: Test Track
Replies: 0
Views: 15392

Test Track

By any chance does anyone have an aluminum track within 100 of Dublin, CA that I could do some test runs on?

Thanks
by Black Fox
Tue Feb 04, 2014 12:05 am
Forum: General Topics
Topic: Weight Placement
Replies: 38
Views: 48509

Re: Weight Placement

Hi Shawn

Okay now I understand. Interesting theory. Maybe this might be more advantageous on an aluminum track which generally have a sharper bend. I'll have to give this some thought. Also, never thought about shortening the back end too. Very interesting.
by Black Fox
Mon Feb 03, 2014 4:49 pm
Forum: General Topics
Topic: Changing Password
Replies: 2
Views: 4924

Re: Changing Password

Thanks!
by Black Fox
Mon Feb 03, 2014 4:24 pm
Forum: General Topics
Topic: Changing Password
Replies: 2
Views: 4924

Changing Password

Gents

I had to get a temporary password a few days ago. However, I would like to change it with something I can remember more easily. I assumed I could do this under user control panel but I don't see it and I can't find it anywhere else. How can I change my password.
by Black Fox
Mon Feb 03, 2014 4:21 pm
Forum: General Topics
Topic: Weight Placement
Replies: 38
Views: 48509

Re: Weight Placement

Hi Stan I figured it would be easier to explain if I took some photos. The first picture is the weight configuration I was planning to use. My understanding from reading other people comments is that for the best results I should have my weights as low as possible with as much weight in the back whi...
by Black Fox
Sun Feb 02, 2014 7:39 pm
Forum: General Topics
Topic: Weight Placement
Replies: 38
Views: 48509

Weight Placement

Gents I've been reading other threads on COG. I came across a comment by Shawn Stembleton in regards to weight placement. Mr. Stembleton says: "For the Best Track profile, you want the weight compressed front-to-back in as little area as possible. It has to do with rotational inertia of the ent...
by Black Fox
Sat Feb 01, 2014 4:49 pm
Forum: General Topics
Topic: Center Of Gravity
Replies: 4
Views: 6131

Re: Center Of Gravity

We have to use a standard wheel base. And the axle holes have been drilled with the Jewkes block with the rear wheels canted.
by Black Fox
Sat Feb 01, 2014 2:17 pm
Forum: General Topics
Topic: Center Of Gravity
Replies: 4
Views: 6131

Center Of Gravity

Greetings Gents My sons in the process of building his PWD car for Cub Scout. Just need a little refresher on the CG. I know 5/8 to 3/4 in front of the rear axle on a standards wheel base is ideal. His is currently a little less that 5/8. I know if its too short your rear end will start to wiggle. S...
by Black Fox
Sat Mar 02, 2013 9:40 pm
Forum: General Topics
Topic: COG Advice
Replies: 3
Views: 5652

COG Advice

Greeting Gents

I need a quick memory refreshing about COG (Center of Gravity). I know on a standard BSA wheel base the COG is about 3/4~1 inch forward of the axle. On an extended wheel base is the COG still the same?

Thanks
by Black Fox
Fri Jan 06, 2012 2:06 pm
Forum: Other Vendors
Topic: Derby Doc-2
Replies: 10
Views: 10951

Re: Derby Doc-2

Gentlemen Thanks for your help. I finally received the items I ordered almost a month after I placed my order. Not once did I ever received a reply explaining or apologizing for the delay. All I got was a notice saying the order was sent on Dec. 22nd. There were a few other issues that I mentioned b...
by Black Fox
Fri Dec 23, 2011 12:11 pm
Forum: Other Vendors
Topic: Derby Doc-2
Replies: 10
Views: 10951

Re: Derby Doc-2

Well There has been some progress. I did get an email saying the order was shipped. No tracking number though. We'll just have to wait and see.