Search found 59 matches

by Jthompson
Mon Feb 11, 2008 11:22 pm
Forum: Space Derby
Topic: Can someone PLEASE send me the plans to the Binder Winder
Replies: 14
Views: 15052

Re: Can someone PLEASE send me the plans to the Binder Winde

I have plans for a 2-up winder similar to the binder winder and easy to build. We built 2 of these and they work great. Counters are resettable. 2 rockets wind in about 7-10 seconds depending on drill speed and number of turns. Cost to build each unit was about $80. You will need a drill press but n...
by Jthompson
Mon Feb 11, 2008 11:18 pm
Forum: Space Derby
Topic: Race Decorations
Replies: 0
Views: 4847

Re: Race Decorations

Hi Randy. We have looked at Oriental Trading. I am hoping for sources like JPL, Boeing, etc. I would like contacts to see if they have any promotional marketing items that they would give out.

Thanks
by Jthompson
Sun Feb 10, 2008 10:43 pm
Forum: Space Derby
Topic: Race Decorations
Replies: 0
Views: 4847

Race Decorations

I would like to have sources for free race decorations with Space or airplane themes. Please post any ideas.
by Jthompson
Sun Feb 10, 2008 10:42 pm
Forum: Space Derby
Topic: Improving Race Efficiency-Reducing Time Between Heats
Replies: 0
Views: 3954

Improving Race Efficiency-Reducing Time Between Heats

I am interested in what other packs and coordinators have done to reduce the time between heats. I would like to get the efficiency closer to the heat times we have for Pinwood Derby. Has anyone mastered this? If so, what have you done? I would like to run a heat once every 45-60 seconds. We have au...
by Jthompson
Sun Feb 10, 2008 10:38 pm
Forum: Space Derby
Topic: Fins & Hanger
Replies: 10
Views: 15013

Re: Fins & Hanger

The 3 fin sheets that BSA kits have weigh approximately 4.07 grams uncut. Large fins can add significant weight to the rocket. Reduce the fin size proportionally, and you can calculate the approximate weight of the fins. The plastic fins are difficult to attach for you Scouts. Cutting through the ro...
by Jthompson
Sun Feb 10, 2008 10:25 pm
Forum: Space Derby
Topic: Space Derby Autowinder Sources needed
Replies: 17
Views: 28667

Re: Space Derby Autowinder Sources needed

I have plans for a two up winder that is similar to the Binder winder but has fewer parts and is easy to build. It has a counter reset and uses commercial grade components and an aluminum housing. Parts can be purchased from the Internet. Construction requires a drill press, specific drill bits, and...
by Jthompson
Sun Feb 10, 2008 10:13 pm
Forum: Space Derby
Topic:
Replies: -1
Views:

Rocket Construction Tips

Does anyone have good templates for rockets/planes that they would like to share? We just ran our first Space Derby and had only two templates that the Scouts used. Most of the rockets looked like one of these two templates.
by Jthompson
Sun Feb 10, 2008 10:08 pm
Forum: Space Derby
Topic: Weigh your wood!
Replies: 4
Views: 5595

Re: Weigh your wood!

I measured 12 blocks of balsa from various kits and found vast differences ranging from 7.5 g to 21.3 g. The average was 12.8 g and the standard deviation was 4.3 g. Lighter is better.
by Jthompson
Thu May 03, 2007 10:50 pm
Forum: Planning, Preps & Running the Race
Topic: Rules Issue...Use slots or allow drilled axle holes?
Replies: 8
Views: 5044

Re: Rules Issue...Use slots or allow drilled axle holes?

I prefer to allow the use of drilled axle holes and open up the rules. It is very easy for a Scout to drill the holes with a jig and I believe this encourages more Scout involvement in building the car. Drilled axle holes make it easy to align the wheels. This method also reduces wood splitting at t...
by Jthompson
Tue Mar 27, 2007 6:09 pm
Forum: General Car/Truck Racer Topics
Topic: Ebay cars
Replies: 150
Views: 86125

Re: Ebay cars

One solution to ebay cars is to give all the Scouts and parents in the pack the necessary knowledge and tools in the workshops to have the Scouts build cars that can compete against the ebay cars. Personally, I think this is the best deterrent. If the Pack can consistently beat the ebay cars, then t...
by Jthompson
Tue Jan 30, 2007 12:42 am
Forum: Construction Workshops
Topic: Workshop procedures
Replies: 1
Views: 3623

Workshop procedures

Does anyone have workshop procedures that they would like to share. I would like to breakdown the process by workstation if possible so that each workstation would have an instruction associated with it. Specifically, I would like to break the stations into the following: 1) Design 2) Body preparati...
by Jthompson
Tue Jan 30, 2007 12:34 am
Forum: Tracks
Topic: Built My Own Track
Replies: 14
Views: 8246

Re: Built My Own Track

We built a 3 - lane version of this track with a few modifications. We used T -nuts as you did, and we cut out channels in the wooden cleats that joined the lane in order for the sheet metal to fit flush. This worked very well. We used the sheet metal for alignment. We clamped the track sections tog...
by Jthompson
Wed Jan 17, 2007 8:04 pm
Forum: Construction Workshops
Topic: Advice on Workshop
Replies: 18
Views: 18097

Re: Advice on Workshop

Math guy, I like your idea on standardizing weight slots. Of everything outer pack tried last year, we universally preferred using a 3/4 inch forstner's drill bit to create holes for pennies. We found we could place three rows of holes two wide toward the back of the car. Cars had anywhere from 32 t...
by Jthompson
Mon Mar 13, 2006 4:35 am
Forum: Electronics
Topic: Microwizard K1 vs. The Judge
Replies: 4
Views: 3857

Re: Microwizard K1 vs. The Judge

Keith, We opted for the K-1 kit this year and added the microswitch and serial port options. This gave us a very inexpensive timer and the capability to use GPRM and a big screen to show results. The serial output to the computer was key. The microswitch added the ability to record times. Thsi was v...
by Jthompson
Mon Mar 13, 2006 4:26 am
Forum: Construction Workshops
Topic: Doing alignment at the workshop
Replies: 14
Views: 15590

Re: Doing alignment at the workshop

We did not have much success with alignment at workshops this year. I think we need to improve the process so Scouts and parents have a better understanding. We were able to teach a few people the shim method. For those who mastered it, the method worked. I would say, however, that we need to streng...