Search found 2643 matches

by FatSebastian
Wed Oct 22, 2014 4:23 pm
Forum: Car & Semi-Truck Construction
Topic: tight grain or wide grain block
Replies: 22
Views: 3755

Re: tight grain or wide grain block

A block with grain close together (tight grain) will weigh more than a block with the grain farther apart. Sounds plausible, yet I was unable to affirm a definite correlation between block weight and grain density. Perhaps others have better data ? Maybe just as important is the orientation of the ...
by FatSebastian
Wed Oct 22, 2014 9:35 am
Forum: Car & Semi-Truck Construction
Topic: Testors paint and temperature
Replies: 6
Views: 1866

Re: Testors paint and temperature

MaxV wrote:This is true of any [spray] paint.
Agree. Also check that the nozzle is clean. It goes without saying that it should be shaken well.
by FatSebastian
Wed Oct 22, 2014 9:28 am
Forum: Car & Semi-Truck Construction
Topic: Stock wheelbase...best to shift axles back?
Replies: 15
Views: 3277

Re: Stock wheelbase...best to shift axles back?

1) Is there a benefit to shifting the wheels further to the rear (while keeping the wheelbase intact)? Generally this configuration also allows for slightly more pressure / weight to be applied to the DFW, since the DFW is closer to the rear (when the mass is concentrated). This potentially improve...
by FatSebastian
Sat Oct 18, 2014 6:48 pm
Forum: Construction Workshops
Topic: Bandsaw Jig
Replies: 8
Views: 3582

Re: Bandsaw Jig

Can you post some pictures of it "in action" (with a body being cut)?
by FatSebastian
Tue Oct 14, 2014 5:18 pm
Forum: Construction Workshops
Topic: Cut and weight
Replies: 3
Views: 2212

Re: Cut and weight

...to get each car to just under 5 oz prior to leaving my garage... can I get away with drilling 1-2 3/8th holes and filling with lead rod? (with then cover with wood putty). It has been quite a while since we worked with 3/8" lead wire, but I seem to recall... 1. You'll need a hole slightly larger...
by FatSebastian
Thu Oct 09, 2014 8:10 pm
Forum: Car & Semi-Truck Construction
Topic: Axle drilling success rate?
Replies: 38
Views: 6346

Re: Axle drilling success rate?

Vitamin K wrote:you run into problems if the inspectors want you to pull a wheel
:eek: Is the disassembling of cars practiced where you race?
by FatSebastian
Fri Oct 03, 2014 7:07 am
Forum: Car & Semi-Truck Construction
Topic: If you have to use stock axle slots, look no further !
Replies: 8
Views: 2499

Re: If you have to use stock axle slots, look no further !

This tool is one we've never tried. I am curious how one should use the tool if canted axles are desired. Is it possible to somehow insert an unbent axle at a cant with this tool, or does one tilt the axle after the fact? Should one insert a bent axle directly, or in a straight axle as a guide, remo...
by FatSebastian
Sun Sep 28, 2014 6:25 pm
Forum: Car & Semi-Truck Construction
Topic: Front nose of car, shape, aero, thin to win ?
Replies: 53
Views: 9533

Re: Front nose of car, shape, aero, thin to win ?

the picture shows air flow going above and below the wheel... If this refers to the image I linked above , I believe it is actually a 3-D sphere, not a wheel. (Thus, for "sideways" deflection one could imagine looking at it from the top!) An operational wheel would have no flow "beneath"; my purpos...
by FatSebastian
Fri Sep 26, 2014 8:50 pm
Forum: Car & Semi-Truck Construction
Topic: Front nose of car, shape, aero, thin to win ?
Replies: 53
Views: 9533

Re: Front nose of car, shape, aero, thin to win ?

The air was so weak, that it is not reaching the back of the car. Good, detailed topic. I'll add that air must be at the back of the car, otherwise it would be in a vacuum. Rather, in relation to ngyoung's illustration , laminar flow moves parallel to the streamlines. The turbulent flow is an area ...
by FatSebastian
Fri Sep 26, 2014 3:29 pm
Forum: Car & Semi-Truck Construction
Topic: Front nose of car, shape, aero, thin to win ?
Replies: 53
Views: 9533

Re: Front nose of car, shape, aero, thin to win ?

The scale speeds with correlation to scale air flow that it creates. If I assume a 1/25 scale I believe that's around 263 mph scale speed... For aerodynamic effects, the scale factor of interest is usually the Reynolds number , which is a function of air density, air viscosity, and speed, as well a...
by FatSebastian
Thu Sep 25, 2014 9:58 am
Forum: Car & Semi-Truck Construction
Topic: Front nose of car, shape, aero, thin to win ?
Replies: 53
Views: 9533

Re: Front nose of car, shape, aero, thin to win ?

Vitamin K wrote:That said, check out this video for the NPWDL's August "Street Stock Pro" race. The winner, Lightningboy's X3, uses a 'side-fender' design...
The video is almost 18 minutes. Can you reference a frame number / time which clearly shows the design being described?
by FatSebastian
Tue Sep 23, 2014 11:56 am
Forum: General Coordinator Topics
Topic: News from New Zealand
Replies: 5
Views: 2660

Re: News from New Zealand

:welcome: heatsink! I enjoyed your post.
gpraceman wrote:It can be hard to gauge the popularity of PWD based on online forums and such.
I agree with Stan and gpraceman, having already expressed a similar thought earlier this year.
by FatSebastian
Mon Sep 22, 2014 6:14 pm
Forum: General Off Topic
Topic: Trail's End is a Cruddy Product
Replies: 23
Views: 7538

Re: Trail's End is a Cruddy Product

Thanks for chiming in dna. Especially good points about the prizes. But why not have a simple cash-donation option. Don't want to buy the popcorn, just throw in a few bucks. Some already offer this, I like it as both a scout dad and as a potential buyer. Just in case I introduced some confusion with...
by FatSebastian
Mon Sep 22, 2014 2:05 pm
Forum: General Off Topic
Topic: Trail's End is a Cruddy Product
Replies: 23
Views: 7538

Re: Trail's End is a Cruddy Product

I think the current fundraising guideline is inappropriate because the major fundraising tool advocated by BSA (i.e. trails end popcorn) doesn't meet the guideline. Okay. Thanks for the response. We agree that popcorn sales are problematic relative to BSA guidelines, but perhaps disagree about whet...
by FatSebastian
Sun Sep 21, 2014 10:53 am
Forum: General Off Topic
Topic: Trail's End is a Cruddy Product
Replies: 23
Views: 7538

Re: Trail's End is a Cruddy Product

How is BSA to police such violations? I suppose such violations come about due to ignorance. If so, training is key (I know about fundraising rules mainly because of BSA Leadership Training). BSA could emphasize fundraising guidelines or incorporate fundraising training as part of their annual Popc...