Welcome GuestShow/Hide Header |
|---|
Welcome Guest, please login or register. |
| Forum Home | Search |
| Technical Questions | |||
|---|---|---|---|
 | Battery Moderators: | Topics: 2 Posts: 4 | Last post by Prudencio in How to download games onto r4 for nintendo ds lite .? on November 8, 2011, 09:20 |
| GPS and Transmitter Moderators: | Topics: 11 Posts: 29 | Last post by Guest in Re: Cell phone service on January 18, 2012, 18:51 |
| CHDK Moderators: | Topics: 6 Posts: 12 | Last post by Arrea in Feed On game for iPad on February 2, 2012, 03:04 |
| General Questions | |||
|---|---|---|---|
| General Moderators: | Topics: 29 Posts: 57 | Last post by Guest in How to make sure parachute works on January 30, 2012, 14:02 |
 New posts  No new posts - Mark All Read |
| Info Center | |
|---|---|
 | 102 Posts in 48 Topics Made by 1259 Members. Latest Member: CamConiapab Latest Post by Arrea on February 2, 2012, 03:04 |
Mingle Forum by cartpauj
Version: 1.0.30 ; Page loaded in: 0.03 seconds.
Version: 1.0.30 ; Page loaded in: 0.03 seconds.
Anyone ever tried sending up “chloroprene” weather balloons? I am considering testing one along with regular latex balloons.
Can anyone address how you are able to track the altitude during ascent? I wanted to use an iPod Touch instead of the phone because of the mobileMe application. However, mobileMe does not track altitude – so far as I have been able to tell. Any ideas? Thanks
My high students just completed a launch in the Phoenix-Tucson area (12/9). It went 120 miles total- 50 more miles than the Wyoming predictions. The retrieval was a challenge. Our camera angle didn’t allow for many atmospheric shots, but got some great ground shots and a few planes. I estimate that altitude to be between 80-100k.
Question- anyone know of cheap, but reliable altimeters? Or is there another way to gauge altitude? I tried doing angular measurements of ground features, but not sure how reliable they are.
http://www.youtube.com/watch?v=SnRz58K16Ag
Question- How did the Icarus guys figure their altitude? I haven’t found it on the site. I don’t think they had an altimeter did they?
I am trying to figure out how to do altitude without an altimeter.
OK. So I have a 600g balloon. How much helium does it hold? I’m going to buy the helium now and do the math laters, so I need a number that’s More than what I need.
I am gearing up to build and launch a upper atmosphere observer. This will include video gps tracking and gps logging to keep track of the pay load and record its flight path. I hope to launch in late july early august. I want to use a 500 gram balloon with a burst diameter of 15 feet. I want to reach an altitude of 100 to 150 thousand feet. 1) Can this be done with that balloon? 2) How far should I inflate the balloon? 3)Pay load is about 5 to 10 pounds +/-, parachute will be a 40 inch, What is the best way to deploy the chute?
I have an answer some of your questions: 1. You will only get to about 80-90000ft if you use the 500g balloon. 2. You should inflate it to about 9-10 ft, but I am not so sure about the exact diameter. 3. Max payload weight is slightly over 2.2 lbs. I got these specs from a similar 500g balloon with a burst diameter of around 17 ft. I would suggest getting a larger balloon for your task. You can look up “weather balloon” on ebay and there are a few large (2000+ gram) military surplus balloons up for sale for about $35 each. Getting enough helium in such large balloons would be expensive, but if that’ s not a problem for you, buying a surplus one would be the best bet.