Post your personal or team best here.

Post your team or personal best. To be displayed on the WRA2 standings page(Altimeter Data and Videos are optional)

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Re: Post your personal or team best here.

Postby WRA2 » Mon May 19, 2008 5:08 pm

The new standings page is online.

http://wra2.org/WRA2_Standings.php

Suggestions are welcome.
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U.S. Water Rockets
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Re: Post your personal or team best here.

Postby U.S. Water Rockets » Mon May 26, 2008 12:05 pm

This is a video of our "personal best" altitude. This is the first flight of a record attempt that we can't count because the camera broke due to the g-forces at launch when we launched the second flight. With no video, we can't submit the second flight, therefore... no record. But we learned a lot and can do better now. We fixed the camera but it took a few days and then we didn't get any more chances to fly.

It's one of our nicest videos. Enjoy!
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Re: Post your personal or team best here.

Postby Spaceman Spiff » Tue May 27, 2008 8:00 am

Cool! 8)
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Mark Chen
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Re: Post your personal or team best here.

Postby Mark Chen » Tue May 27, 2008 12:23 pm

That's impressive. I can't believe how you were able to track that rocket all the way down. That thing had some serious hang-time. I had a question too. What's that buzzing whirling sound?
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Re: Post your personal or team best here.

Postby U.S. Water Rockets » Tue May 27, 2008 9:32 pm

Mark Chen wrote:That's impressive. I can't believe how you were able to track that rocket all the way down. That thing had some serious hang-time. I had a question too. What's that buzzing whirling sound?


Thanks Mark! Glad you enjoyed the video.

First off, the parachute segment is only a fraction of the descent because we can't get good video of the rocket from so far down below. We never get good video of the first portion of the descent because the rocket is so far away it is too small for the camera to resolve unless set for maximum zoom. But, at max zoom it's impossible to hold the camera steady enough to frame the shot. We just keep the zoom in the middle until the rocket gets somewhat lower and becomes more visible in the viewfinder, only then can you zoom in close. When it drifts laterally as it comes down it also becomes easier to frame because the view is more oblique and not end-on, so there's more of the rocket to see. After a few launches it becomes easier to keep the rocket centered in the viewfinder once you have it in range. It just takes practice.

We had a clear sky with no clouds to confuse the focus and good light so we were able to spot the rocket sooner so we were able to tape a lot longer descent footage. Maybe the extra altitude gave so more time to drift and for us to see it too?

The sound you hear is just the compressor running we thought a few seconds more air pressure wouldn't hurt!

Trivia Question: Do you notice anything strange about the water in the bottom of the screen when you first see the onboard video view (just before it launches)? There's something in the water there. Know what that is?
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Re: Post your personal or team best here.

Postby Andromeda » Tue May 27, 2008 11:53 pm

I can't tell. It looks like leaves in the water.
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Tim Chen
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Re: Post your personal or team best here.

Postby Tim Chen » Wed May 28, 2008 9:08 am

U.S. Water Rockets wrote:Trivia Question: Do you notice anything strange about the water in the bottom of the screen when you first see the onboard video view (just before it launches)? There's something in the water there. Know what that is?


It's hard to tell, is it from the rocket? Maybe could it be soap bubbles or something you add to the reaction mass floating on the surface?
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Mark Chen
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Re: Post your personal or team best here.

Postby Mark Chen » Wed May 28, 2008 12:24 pm

U.S. Water Rockets wrote:
Mark Chen wrote:That's impressive. I can't believe how you were able to track that rocket all the way down. That thing had some serious hang-time. I had a question too. What's that buzzing whirling sound?


Thanks Mark! Glad you enjoyed the video.

First off, the parachute segment is only a fraction of the descent because we can't get good video of the rocket from so far down below. We never get good video of the first portion of the descent because the rocket is so far away it is too small for the camera to resolve unless set for maximum zoom. But, at max zoom it's impossible to hold the camera steady enough to frame the shot. We just keep the zoom in the middle until the rocket gets somewhat lower and becomes more visible in the viewfinder, only then can you zoom in close. When it drifts laterally as it comes down it also becomes easier to frame because the view is more oblique and not end-on, so there's more of the rocket to see. After a few launches it becomes easier to keep the rocket centered in the viewfinder once you have it in range. It just takes practice.

We had a clear sky with no clouds to confuse the focus and good light so we were able to spot the rocket sooner so we were able to tape a lot longer descent footage. Maybe the extra altitude gave so more time to drift and for us to see it too?

The sound you hear is just the compressor running we thought a few seconds more air pressure wouldn't hurt!

Trivia Question: Do you notice anything strange about the water in the bottom of the screen when you first see the onboard video view (just before it launches)? There's something in the water there. Know what that is?


I wasn't talking about the compressor sound, I could tell what that was. I was asking about the sound in the onboard camera views. It's hard to hear at first but then when the rocket lands it gets pretty loud.

I have no clue what I'm looking at in the water. I can't think of anything that hasn't been guessed already.
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Re: Post your personal or team best here.

Postby U.S. Water Rockets » Thu May 29, 2008 7:31 pm

Okay... the answer to the trivia question is: ICE! The water in the image has a thin ice sheet all around the shore where it's shallow. We had to chop through it to get our recovery boats deployed. The whole lake froze over within a day or two and that prevented us from trying again for the record.

The noise after splashdown is the camera picking up the radio signals from the telemetry transmitter. If the antenna touches the water the signals don't radiate away so the camera gets a dose of EM energy. Not a big deal.
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Re: Post your personal or team best here.

Postby Spaceman Spiff » Thu May 29, 2008 11:54 pm

U.S. Water Rockets wrote:Okay... the answer to the trivia question is: ICE! The water in the image has a thin ice sheet all around the shore where it's shallow. We had to chop through it to get our recovery boats deployed. The whole lake froze over within a day or two and that prevented us from trying again for the record.

The noise after splashdown is the camera picking up the radio signals from the telemetry transmitter. If the antenna touches the water the signals don't radiate away so the camera gets a dose of EM energy. Not a big deal.


Are you going to go after the record again now that it's springtime?
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Re: Post your personal or team best here.

Postby Team Seneca » Tue Jun 03, 2008 8:30 am

WRA2 wrote:The new standings page is online.

http://wra2.org/WRA2_Standings.php

Suggestions are welcome.


Should there be different rocket categories for the personal best? I think I set the top height for an unreinforced single bottle. It went 467 feet! Perhaps there could be classes for 2l and 1.5l and spliced and multiple stage rockets?
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Tim Chen
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Re: Post your personal or team best here.

Postby Tim Chen » Tue Jun 03, 2008 5:15 pm

Since this is just a list of personal best records I don't think we need to go into categories and stuff. If you want maybe just list the size and type of rocket in the list next to the altitude and leave categorization as an exersize for the reader? :mrgreen:
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Re: Post your personal or team best here.

Postby Team Seneca » Wed Jun 04, 2008 8:43 am

Tim Chen wrote:Since this is just a list of personal best records I don't think we need to go into categories and stuff. If you want maybe just list the size and type of rocket in the list next to the altitude and leave categorization as an exersize for the reader? :mrgreen:


Okie then, I would like to see a description or details column added to the "Personal Best" list. How about we make a chart with a few parameters in columns? This would be nice.
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Re: Post your personal or team best here.

Postby Cloud Dancers » Fri Jul 18, 2008 10:37 pm

407 feet from my 5 liter spliced rocket. Flown tonight. I tried a second flight with more pressue but one of my joints started leaking. I will fix it and try again.
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Daan.[D&P]Rockets*
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Re: Post your personal or team best here.

Postby Daan.[D&P]Rockets* » Mon Aug 18, 2008 5:50 am

Team.[D&P] Rockets* best flight so far with an altimiter is 529` or 161 meters:
http://www.youtube.com/watch?v=e61b6cjgVYo

We are gonna get higher :)