Search found 292 matches
- 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...
- 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
Just imagine: no video games, no computers, no cell phones, few televisions...
K
- 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...
- 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...
- 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...
- 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!
K
Your biggest challenge is all the Pre-schoolers and toddlers (parents?) who'll want to play with it!
K
- 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...
- 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 ...
- 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...
- 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...
- 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...
- 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...
- 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...
- 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...
- 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...