About the list
This list was created to provide a one-stop forum for the discussion of
homemade rockets powered with compressed air and water, and of related
It's now run by
so this page simply serves as a policy page and to
hold the old list archives (17,000 messages).
The typical rocket discussed here is constructed from discarded plastic
soft drink bottles, partially filled with water, pumped with air to high
pressure, and released. Altitudes for single stage rockets can exceed 300
feet, with top speeds over 100 miles per hour!
There are many web sites that provide basic information and pictures: if
you're new to this topic, a browse through some of those sites is
recommended. A good place to begin is Clifford's links list at
Go to the Yahoo home page for the list at
This is a very informal list, and the topics of discussion, while usually
centered on water rockets, can range far and wide. However, we actively
discourage the following. Sanctions range from polite private messages
from me up to instant unsubscription.
The list has an absolute no-spam policy. Spam is theft-of-service,
and offenders will be annihilated.
Healthy argument is fine, but don't start name-calling!
- Privacy invasion
Experience has shown that folk on the list appreciate the
degree of respect that has been shown for individual privacy.
Please don't badger people, and please don't publish their
private email addresses either in one of your CC lines, or by
archiving the list where email addresses are Internet-searchable
(the archive below has been partially filtered to assist).
- Large or irrelevant postings
There is a recommended size limit of 40,000 bytes. Anything
bigger should be published on a website (even in Yahoo's files
area) - a simple pointer and synopsis may be posted. Beware
that mailing an image encodes it in ASCII, which causes around
50% inflation, so a realistic size limit for images is about 20K
(when you allow for text and headers).
If you must post images (within the above size limits), choose an
appropriate format. Use GIF or PNG for drawings, JPG for photos.
BMP is never appropriate.
For politeness, please delete most of a quoted message, leaving only
a few words so that regular readers can be reminded of the context.
- No HTML
Please set your mailer to compose plain text only. This especially
helps people who read the digests of archives. It also stops Yahoo
adding image attachments, which cause some people to reject your
- Failing to read
People who obviously or repeatedly don't bother to read these
instructions (or perhaps the mail to which they're responding)
can expect public scorn and humiliation. Yes, this has even
happened to me :-). Don't come begging with questions that are
readily answered by many web sites either. Generally though
we're a friendly bunch who will be happy to just tell you where
The old list has closed now (the new one has archives on Yahoo),
but these files contain the history of the list (15525 messages!).
Clifford's Home Page