home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!gumby!wupost!crcnis1.unl.edu!unlinfo!rlosee
- From: rlosee@unlinfo.unl.edu (Robert Losee)
- Newsgroups: rec.scouting
- Subject: Re: Space Derby Help Wanted
- Date: 16 Nov 1992 20:46:19 GMT
- Organization: University of Nebraska--Lincoln
- Lines: 119
- Distribution: world
- Message-ID: <1e91arINN7qg@crcnis1.unl.edu>
- References: <1992Nov16.174045.7481@col.hp.com>
- NNTP-Posting-Host: unlinfo.unl.edu
-
- scottb@col.hp.com (Scott Brunton) writes:
- [Well this is a first for me, responding to a post about real scouting,
- not gays, girls, or godless on this group. Thanks for the
- opportunity!]
-
- > Our pack has traditionally held a Pinewood Derby each spring and
- >is looking to try a Space Derby. I contacted our local DE to see if
- >he knew of any other packs that may have experience in running one. He
- >was not aware of anyone.
-
- We ran the Space Derby last spring, and then took it to the scout expo
- where it was well received.
-
- > I would appreciate help and direction in any of the following
- >areas (and others if you think it important):
-
- > * how to construct the track
- > - I had been told that the runs can be as long
- > as 50-75 feet ... apparently, these spacecrafts
- > really fly!
-
- The space in our church was probably about 40 feet, and I suspect
- they could have gone much further. Mechanically the tricky part is
- the starting mechanism. We essentially made two saw horses out of
- 2x4s, we may have had weights pulling on the strings for tension (I
- didn't build it but am just trying to remember it). Hooks were made
- out of coat hangers I think. These held the propellor. It's also
- necessary to have a wire against the actual rocket so the torque in
- the rubber bands don't twist the rockets on the launch pad. These
- were attached to the saw horses and stuck out about four inches. As I
- recall the hooks were on a dowel attached to the saw horse by velcro,
- which was dropped to start the race. My advice is experiment. Our
- designer dads got together for an evening creating different starting
- mechanisms till they found one that worked.
-
- > * how to start them off
- > - I recall reading that a starting block can be made
- > out of wood that would lock the propellors until all
- > spacecrafts are ready to be released
-
- > * material to use a runners
- > - I had been told that monofilament fishing line works well
-
- We used heavy duty mono, hard to see but people figured it out pretty
- quickly.
-
- > * how to determine winner (is electronic necessary?)
- > - again, I had been told that close finishes over a long
- > run are not likely; however, placement may be important
- > for subsequent rounds
-
- We may have had one tie in forty kids. They tended to spread out
- pretty quickly. We just eyeballed it but gave up having a real race
- at the pack meeting (see below).
-
- > * your choice of advice
- > - I'm open to ideas!
-
- We decided not to race the space derby rockets at the pack meeting
- because a number of parents felt things were unfair. Here's the REAL
- IMPORTANT advice to try to avoid our problems:
-
- * set the track up with the length you'll need. Then experiment with
- the NUMBER and TURNS for the rubber bands (RB) needed for a rocket to
- fly the length of track before the big event. The directions are
- ambigous and left a lot of room to interpret, which or course the
- parents did. We're still not sure what's right. Some thought three
- RBs were needed in the rocket, others one. Our current hypothesis is
- to use one RB (three seemed to bind and then break pretty easily).
- Then run the rocket with 50 turns, then 100, then maybe more till it
- loosens up. I use the word hypothesis deliberatedly as next time we
- run we're going to experiment before the big event.
-
- * have the lubricating solution and extra rubber bands on hand. I'm
- guessing at least half the rockets had to be recalled to change out
- the RBs. Had we tried running our tournament as planned (double
- elimination I believe) we'd have been there all night waiting for
- contestants to reinstall the RBs, or having the winners be the lucky
- ones with good RBs. Have a table set up with solution and fix up
- parts (which you should also have). Also USE THE SAME KIND OF RBs.
- The spares we got at the office supply store weren't the same as the
- rockets came with, again leading to cries of foul.
-
- * have the scouts team up with their parents to count the number of
- turns for each rocket. Have 'em winding up when they're in line to
- go. We tried the wiring thingy that you're supposed to put in a hand
- wood drill, but it didn't work so well. We resorted to hand turning
- all props.
-
- * tell the parents they'll have to change rubber bands, so don't glue
- the nose propellor unit or the bar in the back onto the rocket. Help
- them figure out which way to turn the prop so that it spins
- correctly.
-
- I'd encourage you Scott to use an ad hoc race format we were forced
- into. In the end we just had a line of kids coming up running their
- rockets against their buddy's or other dens. It was spontaneous and
- fun for them, without the pressure of winning the derby. If their RB
- broke they went back to fix it and got in line again. I think an
- organized race such as double elimination would be difficult. Too
- many technical difficults and variations that can result in time
- delays and parental squabbles. Most kids left with smiles without
- doing it this way. Winning SD is based less on good design, and
- more on the luck of the RBs, the bounce in the lines, etc..
-
- The most memorable rocket in our group looked like a milk bottle with
- the name "Milky Way" on it. Loved it. Maybe you want a design
- catagory but we just gave ribbons to everyone.
-
- Hope this helps. If you really need to know more details about how
- the starting mechanism works I'll take a look at it.
-
- > Thanks, Scott Brunton (scottb@col.hp.com)
- Bob Losee, Cub Master, Pack 29
- --
- *-------------------------------------------------------------------------*
- Robert D. Losee BITNET: ucas402@unlvm
- University of Nebraska Internet: rlosee@unlinfo.unl.edu
- Lincoln NE 68588-0496 Phone: (402) 472-7663
-