Search found 292 matches

by Kenny
Wed Apr 28, 2010 7:44 am
Forum: Car & Semi-Truck Construction
Topic: Energy Loss Due to Rear Wheel Steer
Replies: 27
Views: 14604

Re: Energy Loss Due to Rear Wheel Steer

There is a risk, of course, that the rears could have comparable net coefficients of friction because their individual faults were offsetting. My process would not alert for that situation! Hmmm ... I wonder ... I hadn't considered that in my response but that is worth noting. I realized that I had...
by Kenny
Tue Apr 27, 2010 10:17 pm
Forum: Car & Semi-Truck Photos
Topic: Something vintage to share
Replies: 56
Views: 143100

Re: Something vintage to share

Thank you for posting this.

Just imagine: no video games, no computers, no cell phones, few televisions...


K
by Kenny
Tue Apr 27, 2010 10:06 pm
Forum: Car & Semi-Truck Construction
Topic: New Wheel Times Vs. Old Wheels
Replies: 10
Views: 10535

Re: New Wheel Times Vs. Old Wheels

One thing that may account for some people experiencing slower times with the newer wheels could have been performing legacy wheel and axle treatments. When using methods used on pre 2009 wheel/axle combo for example removing step, rounding the head, strong neg camber may negatively impact performan...
by Kenny
Tue Apr 27, 2010 9:38 pm
Forum: General Car/Truck Racer Topics
Topic: Final PWD race
Replies: 8
Views: 11439

Re: Final PWD race

PDaddy~ Suspecting you've experienced the phenomena of personal time acceleration - its where time speeds up proportional to the number of birthdays beyond age 35 each successive birthday. If this concept is foreign to you, get ready for it. It's as certain as eye correction and taxes. It is in this...
by Kenny
Tue Apr 27, 2010 9:24 pm
Forum: Car & Semi-Truck Construction
Topic: Energy Loss Due to Rear Wheel Steer
Replies: 27
Views: 14604

Re: Energy Loss Due to Rear Wheel Steer

After reading this post I wondered to myself where exactly certain scenarios fall within the list, such as: 1 Unequal weight wheels 2 Unequal axle diameters, hub bores identical diameter 3 Unequal hub bore diameters with fixed axles sizes 4 Excessive gap on one or both sides 5 Unequal axle hole heig...
by Kenny
Sat Apr 24, 2010 9:26 am
Forum: Car & Semi-Truck Photos
Topic: Scout Show Car 2010
Replies: 20
Views: 16571

Re: Scout Show Car 2010

Well done! I bet Stan knows some CAT engineers that might like a photo of this dude.

Your biggest challenge is all the Pre-schoolers and toddlers (parents?) who'll want to play with it! :D

K
by Kenny
Wed Apr 21, 2010 10:11 am
Forum: Car & Semi-Truck Construction
Topic: New Wheel Times Vs. Old Wheels
Replies: 10
Views: 10535

Re: New Wheel Times Vs. Old Wheels

All else being equal, the lighter wheel wins on standad length PWD track and a 5 oz car. Physics says it's so, and empirical data says so too. The difference is substantial as stated above. This year many of the wheels were so good - out of well made and fresh molds - that you probably should have l...
by Kenny
Mon Apr 19, 2010 9:25 pm
Forum: Car & Semi-Truck Construction
Topic: Krytox application
Replies: 8
Views: 8331

Re: Krytox application

Krytox is very friendly. I recommend that you really clean those axles and wheel bores and make sure there's nothing left behind from polishing. I like to use a can of dry air, the type that you use to blow off PC keyboards and camera lenses, to blow out the wheel hubs. I like to apply two or three ...
by Kenny
Thu Apr 15, 2010 7:47 pm
Forum: Car & Semi-Truck Construction
Topic: Left to Right COG
Replies: 13
Views: 8986

Re: Left to Right COG

Our newest car has a cog of 9/16" and weight is shifted to dominant side. 2.5 positive on back and 1.5 negative on front. 2 1/2" drift in four feet. Rear wheel weight is within .15 ounces of each other. Car is real steady and flies. :mrgreen: Thanks to all. Wow, you've been busy! Everythi...
by Kenny
Mon Apr 12, 2010 10:26 pm
Forum: General Car/Truck Racer Topics
Topic: Invitational Race Format
Replies: 8
Views: 9711

Re: Invitational Race Format

I've not sorted out the details yet, but there are some cool scholarship funds available to the child participant as well as some charitable contributions which would split a significant share of the "gate". Major sponsors include MSC Direct, Power Master, Jet, Harbor Freight, Taig, Mc Mas...
by Kenny
Mon Apr 12, 2010 10:10 pm
Forum: General Car/Truck Racer Topics
Topic: Invitational Race Format
Replies: 8
Views: 9711

Re: Invitational Race Format

K, My sons Boy Scout troop had a one day build. 6 hoursn no parents allowed, supervised by scout master and several eagle scouts. Did not have quite the array of tools you list, however did have acess to band saw and table saw in addition to hand and hand power tools. It came about as a result of s...
by Kenny
Mon Apr 12, 2010 8:35 am
Forum: General Car/Truck Racer Topics
Topic: Invitational Race Format
Replies: 8
Views: 9711

Invitational Race Format

What do you think about my fantasy Invitational Race Format? Shoebox Invitational Summary: Invited racer teams must consisting of a child age 12 or under, and an adult age 18 or over, must build and finish a pinewood car within the same building using anything that can fit in a standard cardboard sn...
by Kenny
Fri Apr 09, 2010 12:22 pm
Forum: General Car/Truck Racer Topics
Topic: Houston Cub Scout Council Races - Megaderby 7
Replies: 13
Views: 12595

Re: Houston Cub Scout Council Races - Megaderby 7

Awesome event, and quite a spectacle that is really well executed. We've had a lot of fun here over the past 4 years, but Andrew has crossed over and says he's officially retired with nothing left to prove. <sigh> Andrew and I always thought we were very fortunate to have this event so near each yea...
by Kenny
Fri Apr 09, 2010 11:48 am
Forum: General Car/Truck Racer Topics
Topic: Pinewood Derby App
Replies: 7
Views: 8256

Re: Pinewood Derby App

... or an iPad :D . Anyway, it's not so much an app as it is an e-book. It's pretty basic and generic. It goes into a little bit of everything from body design, cutting out the design, sanding, finishing, etc. It also goes into wheel and axle prep a little bit. However, it's always from the standpo...
by Kenny
Wed Mar 31, 2010 5:47 pm
Forum: General Topics
Topic: Cumulative time format
Replies: 28
Views: 24756

Re: Cumulative time format

His response was short and to the point. Thanks but no thanks. This is the way we have always run the event (without complaints) and plan to continue. He asked if I would have felt differently had my buddies son made it to final. Small mind and tunnel vision, great combo. I don't plan on responding...