aluminum foil. keeps moisture out, solvents in. Heavy duty, several layers (like 10) with a small hose clamp to keep it tight on the nozzle... and cap it...
What kind of launcher(s) are you using for this many kids? I use water rockets with my kids at school, but I have had a hard time finding reliable launchers...
... Thanks, Clifford, for this clear lines. I noted for quite a while that more and more people just hit "reply" and post ALL of the stuff in the previous...
... The thing that really kills of bandwidth is HTML mail. A repeat of the body contents and then all of those pointless little gifs and jpegs. If you want to...
Paul at NTL
pagrosse@...
Jul 2, 2004 7:53 pm
2518
... Basically I am using a Clark cable tie launcher that I built myself. The basic launch stem design is documented in several places on the net. I have added...
how is the water connected? ... <image.tiff> ... <image.tiff> ... Michael J. Herron, U of MN, Dept. of Entomology herro001@... 612-624-3688 (office)...
... I have a female hose end on the launcher so I can connect up a garden hose. In practice I use a couple of the roll-flat hoses we have all seen advertised...
Did some snipping of my last post and a drawing of how my launch manifold is built. Valves and such add up in cost fast. Every part is red brass or better....
... I like the staging mechanism. If you want to model this to get optimum fill values, you can use my simulator which copes with three different staging ...
Paul at NTL
pagrosse@...
Jul 8, 2004 6:37 am
2527
Paul Said: I like the staging mechanism. If you want to model this to get optimum fill values, you can use my simulator which copes with three different...
... garden hose. I found a French site where they use pump sprayers to force water into a bottle on launcher in the field. I've built a launcher like this with...
Hi Lonnie, your new site looks nice, but it has a HUGE loading time. Do check your pic sizes: for example, the smallest (area) pic on the skirt fin page has...
Hi list, I have a new story on my page 'other PET uses': Chain reaction. "Chain Reaction (Kettenreaktion) by Tobias Horriar. This is the most elaborate...
Hi Lonnie and list, sorry, this mail should have gone only to Lonnie, not to the list. I did not intend to criticise Lonnie, especially not publicly. This was...
on his page http://hstrial-lengbrecht.homestead.com/Deployment.html ... This may not be true. The vinegar may float up while the rocket is coasting vertically....
... From: Roderick McGuire on his page http://hstrial-lengbrecht.homestead.com/Deployment.html ... coasting vertically. the outside drag will propel the...
What you say SHOULD be true, but if you test the hot vinegar that Lonnie uses you find that it fires instantly when it comes in contact with the baking soda;...
... Rob, I to agree with you. But, believe it or not. It works and works very well. Have you tried it yourself? The film canister is instant and the T8 has...
Rob, during my bench test I have observed that how well the vinegar mixes makes a huge difference. Some may mix during deceleration, but not enough to...
Lonnie wrote: The film canister is instant and the T8 has a slight delay. I would have not placed it on my site if it wasn't so. With the hot vinegar very...
With vinegar and soda mixture, using less of either one will vary the time delay. The T8 tube design is perfect for delayed deployment. But keep the mixing...
... From: Lonnie Engbrecht With vinegar and soda mixture, using less of either one will vary the time delay. The T8 tube design is perfect for delayed...
A note regarding rocket deceleration (brought up by chem deploy discussion)... In my recent launch fest, my favorite WR was a basic 2L with index card fins and...
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