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Re: Hovering contest

Posted: Thu Sep 18, 2008 12:16 pm
by Cloud Dancers
This contest sounds more interesting now that there has been some discussion and clairification. Maybe what is needed is a description of each contest. I like the idea that this is more of a "recovery system" competition and that you don't need expensive altimiters or materials to build the rocket. That means that I can concentrate my rexsources on a top notch lightweight recovery system.

Re: Hovering contest

Posted: Sat Sep 20, 2008 5:41 pm
by RaZias
Check this hovering toy. It´s not a rocket it´s more a ufo-helicopter.

[youtube][/youtube]

Re: Hovering contest

Posted: Sun Sep 21, 2008 6:57 pm
by Brian
RaZias wrote:Check this hovering toy. It´s not a rocket it´s more a ufo-helicopter.

[youtube][/youtube]
ive got 1 of those.

Re: Hovering contest

Posted: Wed Sep 24, 2008 12:49 pm
by RaZias
Where it´s a picture of a cracked bottom of a bottle.
This was a hover-rocket when I fill with 250 ml of water and 40 psi.
The valve is glued to the rocket whit a 1440 psi glue for plastics from Pattex.
Image1.jpg
Image1.jpg (86.1 KiB) Viewed 80 times

When the rocket is littly tilted it flies in a spiral in a 10m area keeping an diagonal attitude during the flight. This only happens like 1 in 10 times.

Because the nozzle goes inside the rocket some of the water doesn´t get out so it will be a movable mass that avoids the rocket aiming up and keeping a spiral movement.

This was the 2nd hover-rocket and as the first one it also blasted the bottom after some flights.

It has nothing to due with pressure since I tested with 60 psi and every thing was ok...but after some flights at 40 psi it cracked.

The 2 rockets had different glues, one very weak and one that is strong.
So it has nothing to due with the glue.

Why I am using a bike valve ?
Well to hover it needs low pressure and a small nozzle but the combination of the 2 doesn´t give enough trusth to win the gardena friction.
Unplugging the compressor from the valve made it work.

Why in the bottom ?
I think it amplifies more the effect of the water tilting.

Re: Hovering contest

Posted: Sun Sep 06, 2009 4:10 am
by castle-bravo
nice idea but just what wra2 is saying we just need more members that ar willing to compete the curent's records