Date   

Re: WB8ELK Skytracker Ch5?

Bill Brown
 

Hi David,

Channel 5 is the sequence number:  08 3.28 10 347 15     08 is GPS sats, 3.28 volts solar panel, 10 deg C, 347 is altitude in meters, 15 is sequence number.

- Bill WB8ELK




-----Original Message-----
From: David Haworth WA9ONY <WA9ONY@...>
To: GPSL@groups.io
Sent: Mon, Mar 29, 2021 6:55 pm
Subject: [GPSL] WB8ELK Skytracker Ch5?


WB8ELK Balloon tracker Comments is five channels.

What is channel five?

Ch 1: Number of GPS Sats
Ch 2: Solar voltage
Ch 3: Temp in C
Ch 4: Altitude in meters
Ch 5: ?

In the attached image Ch5 is 18.


--
73 David WA9ONY

Weather Underground: WA9ONY
Balloons at Groups.io
YouTube: The Art of SDR
YouTube: David Haworth WA9ONY
QRZ: WA9ONY


WB8ELK Skytracker Ch5?

David Haworth WA9ONY
 


WB8ELK Balloon tracker Comments is five channels.

What is channel five?

Ch 1: Number of GPS Sats
Ch 2: Solar voltage
Ch 3: Temp in C
Ch 4: Altitude in meters
Ch 5: ?

In the attached image Ch5 is 18.


--
73 David WA9ONY

Weather Underground: WA9ONY
Balloons at Groups.io
YouTube: The Art of SDR
YouTube: David Haworth WA9ONY
QRZ: WA9ONY


Spring Equinox celebration flights have been launched Worldwide

Bill Brown
 

Trevor KS1LAS organized a massive launch from schools across the US and the World. They are all using the SBS-13 balloon and my Skytrackers (both APRS and some are WSPR).  

The ones currently flying:

APRS:

KM6BWB-3 (KD2VGT-2 caught up to this one over AZ on its 4th lap around the World and they are currently right next to each other in a race).
KS1LAS-1
KG7KYW-2
WX4GPS-11
WB2WGH-1
K7HAK-11

WSPR:

KM4ZIA-3 (launched late at night for optimal surface winds)  KM4ZIA on WSPR
VK3ZWI-6 (VK3ZWI on WSPR)
LU1ESY-18 (launched late at night for optimal surface winds)  LU1ESY on WSPR

And launching today K4UAH-7 (KM4LVC on WSPR).

- Bill WB8ELK


Re: Balloon fight for grade 6 students

David Stillman KI6YMZ
 

I've had a servo fail at ~50k feet before - my best guess is the grease in the gearbox froze or something along those lines due to the extreme cold. The servo was operational in testing after recovery.

It might be fun, depending on time, to do a freezer test with the students ahead of launch.

Dave Stillman

On Thu, Mar 11, 2021, at 21:40, James Hannon wrote:
I am using some sub micro servos for a project. 3.7 grams
https://www.pololu.com/product/1053


Jim Hannon

On 3/11/2021 12:39 PM, L. Paul Verhage KD4STH wrote:
Servos are only a few ounces. A PICAXE or BASIC Stamp is easy to program
and has a command specifically for servos.

On Thu, Mar 11, 2021, 11:09 AM Jules Hojnowski <jah1690@outlook.com
<mailto:jah1690@outlook.com>> wrote:

That is a great idea, but would that not make a lot of extra weight?

And i think making servos would be very labour intensive? I have not
seen any ready mady tiny ones to buy. Just a thought.

Jules





--
WB0TXL
WEB Page http://www.ocrslc.net/
Blog http://jimhannon.wordpress.com
CoCoRaHS station IA-LN-7
42,11.90N,91,39.26W








Re: Balloon fight for grade 6 students

James Hannon
 

I am using some sub micro servos for a project. 3.7 grams
https://www.pololu.com/product/1053


Jim Hannon

On 3/11/2021 12:39 PM, L. Paul Verhage KD4STH wrote:
Servos are only a few ounces. A PICAXE or BASIC Stamp is easy to program and has a command specifically for servos.
On Thu, Mar 11, 2021, 11:09 AM Jules Hojnowski <jah1690@outlook.com <mailto:jah1690@outlook.com>> wrote:
That is a great idea, but would that not make a lot of extra weight?
And i think making servos would be very labour intensive? I have not
seen any ready mady tiny ones to buy. Just a thought.
Jules
--
WB0TXL
WEB Page http://www.ocrslc.net/
Blog http://jimhannon.wordpress.com
CoCoRaHS station IA-LN-7
42,11.90N,91,39.26W


Re: Balloon fight for grade 6 students

Jules Hojnowski
 

Nice :) thanks
Jules


From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 3:43:11 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
You'll need four "AAA"batteries. You can use a single battery pack for all the servos. Alternatively, you might use a lighter weight LiPo battery, but watch the voltage.

Alkaline will work if you keep them inside the airframe and insulated from the worst cold of near space.

On Thu, Mar 11, 2021, 1:05 PM Jules Hojnowski <jah1690@...> wrote:
Oh! But what about tge battery weight?

Jules


From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 2:56:39 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
I'm thinking of small airplane servos. You can get them from parallax.com. They run off a four-battery pack.

On Thu, Mar 11, 2021, 11:46 AM Jules Hojnowski <jah1690@...> wrote:
Oh ok, i just remembered the servo we made and put on was more than a few ozs :)

Jules


From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 1:39:08 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
Servos are only a few ounces. A PICAXE or BASIC Stamp is easy to program and has a command specifically for servos.

On Thu, Mar 11, 2021, 11:09 AM Jules Hojnowski <jah1690@...> wrote:
That is a great idea, but would that not make a lot of extra weight?

And i think making servos would be very labour intensive? I have not seen any ready mady tiny ones to buy. Just a thought.

Jules






From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 12:45:18 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
How about covering the beads with a light shield and then using a servo to open the shield. You could do this at different altitudes with different beads. Using video, you could determine how long it takes for the beads to darken. I am assuming the faster they darken, the greater the UV intensity. Students would need to program a microcontroller to position the servos at different times during the flight.

On Thu, Mar 11, 2021, 10:08 AM Mike, n0mpm <n0mpm52@...> wrote:
Amazon is your friend as well as many STEM educational websites.  I forgot to mention we tried smearing some different sunblock products on them to see what would happen....I think by the time we got up to altitude, all the sunscreen products were overwhelmed with UV ....Colors get darker the higher you go...
73,
mike


Re: Balloon fight for grade 6 students

L. Paul Verhage KD4STH
 

You'll need four "AAA"batteries. You can use a single battery pack for all the servos. Alternatively, you might use a lighter weight LiPo battery, but watch the voltage.

Alkaline will work if you keep them inside the airframe and insulated from the worst cold of near space.

On Thu, Mar 11, 2021, 1:05 PM Jules Hojnowski <jah1690@...> wrote:
Oh! But what about tge battery weight?

Jules


From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 2:56:39 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
I'm thinking of small airplane servos. You can get them from parallax.com. They run off a four-battery pack.

On Thu, Mar 11, 2021, 11:46 AM Jules Hojnowski <jah1690@...> wrote:
Oh ok, i just remembered the servo we made and put on was more than a few ozs :)

Jules


From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 1:39:08 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
Servos are only a few ounces. A PICAXE or BASIC Stamp is easy to program and has a command specifically for servos.

On Thu, Mar 11, 2021, 11:09 AM Jules Hojnowski <jah1690@...> wrote:
That is a great idea, but would that not make a lot of extra weight?

And i think making servos would be very labour intensive? I have not seen any ready mady tiny ones to buy. Just a thought.

Jules






From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 12:45:18 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
How about covering the beads with a light shield and then using a servo to open the shield. You could do this at different altitudes with different beads. Using video, you could determine how long it takes for the beads to darken. I am assuming the faster they darken, the greater the UV intensity. Students would need to program a microcontroller to position the servos at different times during the flight.

On Thu, Mar 11, 2021, 10:08 AM Mike, n0mpm <n0mpm52@...> wrote:
Amazon is your friend as well as many STEM educational websites.  I forgot to mention we tried smearing some different sunblock products on them to see what would happen....I think by the time we got up to altitude, all the sunscreen products were overwhelmed with UV ....Colors get darker the higher you go...
73,
mike


Re: Balloon fight for grade 6 students

Jules Hojnowski
 

Oh! But what about tge battery weight?

Jules


From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 2:56:39 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
I'm thinking of small airplane servos. You can get them from parallax.com. They run off a four-battery pack.

On Thu, Mar 11, 2021, 11:46 AM Jules Hojnowski <jah1690@...> wrote:
Oh ok, i just remembered the servo we made and put on was more than a few ozs :)

Jules


From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 1:39:08 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
Servos are only a few ounces. A PICAXE or BASIC Stamp is easy to program and has a command specifically for servos.

On Thu, Mar 11, 2021, 11:09 AM Jules Hojnowski <jah1690@...> wrote:
That is a great idea, but would that not make a lot of extra weight?

And i think making servos would be very labour intensive? I have not seen any ready mady tiny ones to buy. Just a thought.

Jules






From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 12:45:18 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
How about covering the beads with a light shield and then using a servo to open the shield. You could do this at different altitudes with different beads. Using video, you could determine how long it takes for the beads to darken. I am assuming the faster they darken, the greater the UV intensity. Students would need to program a microcontroller to position the servos at different times during the flight.

On Thu, Mar 11, 2021, 10:08 AM Mike, n0mpm <n0mpm52@...> wrote:
Amazon is your friend as well as many STEM educational websites.  I forgot to mention we tried smearing some different sunblock products on them to see what would happen....I think by the time we got up to altitude, all the sunscreen products were overwhelmed with UV ....Colors get darker the higher you go...
73,
mike


Re: Balloon fight for grade 6 students

L. Paul Verhage KD4STH
 

I'm thinking of small airplane servos. You can get them from parallax.com. They run off a four-battery pack.


On Thu, Mar 11, 2021, 11:46 AM Jules Hojnowski <jah1690@...> wrote:
Oh ok, i just remembered the servo we made and put on was more than a few ozs :)

Jules


From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 1:39:08 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
Servos are only a few ounces. A PICAXE or BASIC Stamp is easy to program and has a command specifically for servos.

On Thu, Mar 11, 2021, 11:09 AM Jules Hojnowski <jah1690@...> wrote:
That is a great idea, but would that not make a lot of extra weight?

And i think making servos would be very labour intensive? I have not seen any ready mady tiny ones to buy. Just a thought.

Jules






From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 12:45:18 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
How about covering the beads with a light shield and then using a servo to open the shield. You could do this at different altitudes with different beads. Using video, you could determine how long it takes for the beads to darken. I am assuming the faster they darken, the greater the UV intensity. Students would need to program a microcontroller to position the servos at different times during the flight.

On Thu, Mar 11, 2021, 10:08 AM Mike, n0mpm <n0mpm52@...> wrote:
Amazon is your friend as well as many STEM educational websites.  I forgot to mention we tried smearing some different sunblock products on them to see what would happen....I think by the time we got up to altitude, all the sunscreen products were overwhelmed with UV ....Colors get darker the higher you go...
73,
mike


Re: Balloon fight for grade 6 students

Jules Hojnowski
 

Oh ok, i just remembered the servo we made and put on was more than a few ozs :)

Jules


From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 1:39:08 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
Servos are only a few ounces. A PICAXE or BASIC Stamp is easy to program and has a command specifically for servos.

On Thu, Mar 11, 2021, 11:09 AM Jules Hojnowski <jah1690@...> wrote:
That is a great idea, but would that not make a lot of extra weight?

And i think making servos would be very labour intensive? I have not seen any ready mady tiny ones to buy. Just a thought.

Jules






From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 12:45:18 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
How about covering the beads with a light shield and then using a servo to open the shield. You could do this at different altitudes with different beads. Using video, you could determine how long it takes for the beads to darken. I am assuming the faster they darken, the greater the UV intensity. Students would need to program a microcontroller to position the servos at different times during the flight.

On Thu, Mar 11, 2021, 10:08 AM Mike, n0mpm <n0mpm52@...> wrote:
Amazon is your friend as well as many STEM educational websites.  I forgot to mention we tried smearing some different sunblock products on them to see what would happen....I think by the time we got up to altitude, all the sunscreen products were overwhelmed with UV ....Colors get darker the higher you go...
73,
mike


Re: Balloon fight for grade 6 students

L. Paul Verhage KD4STH
 

Servos are only a few ounces. A PICAXE or BASIC Stamp is easy to program and has a command specifically for servos.


On Thu, Mar 11, 2021, 11:09 AM Jules Hojnowski <jah1690@...> wrote:
That is a great idea, but would that not make a lot of extra weight?

And i think making servos would be very labour intensive? I have not seen any ready mady tiny ones to buy. Just a thought.

Jules






From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 12:45:18 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
How about covering the beads with a light shield and then using a servo to open the shield. You could do this at different altitudes with different beads. Using video, you could determine how long it takes for the beads to darken. I am assuming the faster they darken, the greater the UV intensity. Students would need to program a microcontroller to position the servos at different times during the flight.

On Thu, Mar 11, 2021, 10:08 AM Mike, n0mpm <n0mpm52@...> wrote:
Amazon is your friend as well as many STEM educational websites.  I forgot to mention we tried smearing some different sunblock products on them to see what would happen....I think by the time we got up to altitude, all the sunscreen products were overwhelmed with UV ....Colors get darker the higher you go...
73,
mike


Re: Balloon fight for grade 6 students

Jules Hojnowski
 

That is a great idea, but would that not make a lot of extra weight?

And i think making servos would be very labour intensive? I have not seen any ready mady tiny ones to buy. Just a thought.

Jules






From: GPSL@groups.io <GPSL@groups.io> on behalf of L. Paul Verhage KD4STH <nearsys@...>
Sent: Thursday, March 11, 2021 12:45:18 PM
To: GPSL@groups.io <GPSL@groups.io>
Subject: Re: [GPSL] Balloon fight for grade 6 students
 
How about covering the beads with a light shield and then using a servo to open the shield. You could do this at different altitudes with different beads. Using video, you could determine how long it takes for the beads to darken. I am assuming the faster they darken, the greater the UV intensity. Students would need to program a microcontroller to position the servos at different times during the flight.

On Thu, Mar 11, 2021, 10:08 AM Mike, n0mpm <n0mpm52@...> wrote:
Amazon is your friend as well as many STEM educational websites.  I forgot to mention we tried smearing some different sunblock products on them to see what would happen....I think by the time we got up to altitude, all the sunscreen products were overwhelmed with UV ....Colors get darker the higher you go...
73,
mike


Re: Balloon fight for grade 6 students

L. Paul Verhage KD4STH
 

How about covering the beads with a light shield and then using a servo to open the shield. You could do this at different altitudes with different beads. Using video, you could determine how long it takes for the beads to darken. I am assuming the faster they darken, the greater the UV intensity. Students would need to program a microcontroller to position the servos at different times during the flight.


On Thu, Mar 11, 2021, 10:08 AM Mike, n0mpm <n0mpm52@...> wrote:
Amazon is your friend as well as many STEM educational websites.  I forgot to mention we tried smearing some different sunblock products on them to see what would happen....I think by the time we got up to altitude, all the sunscreen products were overwhelmed with UV ....Colors get darker the higher you go...
73,
mike


Re: Balloon fight for grade 6 students

Mike, n0mpm
 

Amazon is your friend as well as many STEM educational websites.  I forgot to mention we tried smearing some different sunblock products on them to see what would happen....I think by the time we got up to altitude, all the sunscreen products were overwhelmed with UV ....Colors get darker the higher you go...
73,
mike


Re: Balloon fight for grade 6 students

Bruce Coates
 

Hi Mike

Very cool.  Where did you find the UV sensitive beads?

73, Bruce

On 2021-03-11 8:47 a.m., Mike, n0mpm wrote:
Some years back we flew for Grout Children's Museum.  A hit was flying "Einstein" with a UV sensitive bead necklace.  Pictures showed the beads changing color with UV intensity...Big hit and a bit of science too.
73,
mike


Re: Balloon fight for grade 6 students

Mike, n0mpm
 

Some years back we flew for Grout Children's Museum.  A hit was flying "Einstein" with a UV sensitive bead necklace.  Pictures showed the beads changing color with UV intensity...Big hit and a bit of science too.
73,
mike


Re: Balloon fight for grade 6 students

Bruce Coates
 

Thanks Bill

Great ideas.  Thanks for rebminding me about Paul's potato bomb.  

I assume the control moon pie would need to be under lock and key or protected by a burley guard.  ;-)

73, Bruce 


-------- Original message --------
From: "Bill Brown via groups.io" <wb8elk@...>
Date: 3/11/21 12:22 AM (GMT-06:00)
To: GPSL@groups.io
Subject: Re: [GPSL] Balloon fight for grade 6 students

Hi Bruce,

  We have sent up a banana....nice yellow one (still a little green on the edges)...when it came back it was brown and mushy like it had been in a fridge for a year.

  We also send up a Moon Pie cookie and had a control Moon Pie in the classroom.  Then had the students taste test the Near Space Moon Pie and comparing it to the normal Control Moon Pie.  The Near Space one lost air in the marshmallow center so it was firmer and they said it tasted better :-)

  We also sent up fishing crickets and they all survived.

  Apple slices are a good experiment too.

  Latex balloons partially inflated on the flight line with a camera pointed at them during the flight is good too.

  Don't forget Paul Verhage's potato bombs too....potato chip bags.

  Take seeds aloft and plant them next to control seeds left in the classroom to see if the radiation environment had any effect.

  Send a dandelion or flower aloft.

- Bill WB8ELK



-----Original Message-----
From: Bruce Coates <bruce.coates@...>
To: GPSL@groups.io
Sent: Wed, Mar 10, 2021 5:15 pm
Subject: [GPSL] Balloon fight for grade 6 students

Hi

We're in preliminary talks with a local high school to fly a balloon for
a grade 6 class in May or June.  What sorts of experiments, etc have
people found are suitable for this age group?

Thanks

Bruce - VE5BNC






Re: Balloon fight for grade 6 students

L. Paul Verhage KD4STH
 

Carbon dioxide, helium, nitrogen from the air.


On Wed, Mar 10, 2021, 9:23 PM Jason Unwin via groups.io <generalripper_1999=yahoo.com@groups.io> wrote:
What gases did you use?


On Wed, Mar 10, 2021 at 19:31, L. Paul Verhage KD4STH
<nearsys@...> wrote:
We had students launch balloons filled with different gases and then photographed them throughout the flight. By measuring the diameters they determined if all gases behave the same. Another class send up rubber bands stretched around silver and black colored surfaces to see if rubber bands could survive the cold, ultraviolet radiation, and ozone of near space.  another one was to have students design a habitat for insects and then see the insects can survive within the habitat they designed.

On Wed, Mar 10, 2021, 4:15 PM Bruce Coates <bruce.coates@...> wrote:
Hi

We're in preliminary talks with a local high school to fly a balloon for
a grade 6 class in May or June.  What sorts of experiments, etc have
people found are suitable for this age group?

Thanks

Bruce - VE5BNC






Re: Balloon fight for grade 6 students

Bill Brown
 

We also once took up a box with a remotely activated servo trap door.....we had the box filled with dozens of brightly colored paper airplanes with the school address if anyone found it and a serial number for each student on each plane they had made.  We dropped the planes from about 80,000 feet and got a few of them back over the next few weeks and months.

We also did this from a tethered balloon from about 200 feet up and gave prizes to the top 10 planes that flew the farthest from the balloon drop point.

- Bill WB8ELK



-----Original Message-----
From: Bruce Coates <bruce.coates@...>
To: GPSL@groups.io
Sent: Wed, Mar 10, 2021 5:15 pm
Subject: [GPSL] Balloon fight for grade 6 students

Hi

We're in preliminary talks with a local high school to fly a balloon for
a grade 6 class in May or June.  What sorts of experiments, etc have
people found are suitable for this age group?

Thanks

Bruce - VE5BNC






Re: Balloon fight for grade 6 students

Bill Brown
 

Hi Bruce,

  We have sent up a banana....nice yellow one (still a little green on the edges)...when it came back it was brown and mushy like it had been in a fridge for a year.

  We also send up a Moon Pie cookie and had a control Moon Pie in the classroom.  Then had the students taste test the Near Space Moon Pie and comparing it to the normal Control Moon Pie.  The Near Space one lost air in the marshmallow center so it was firmer and they said it tasted better :-)

  We also sent up fishing crickets and they all survived.

  Apple slices are a good experiment too.

  Latex balloons partially inflated on the flight line with a camera pointed at them during the flight is good too.

  Don't forget Paul Verhage's potato bombs too....potato chip bags.

  Take seeds aloft and plant them next to control seeds left in the classroom to see if the radiation environment had any effect.

  Send a dandelion or flower aloft.

- Bill WB8ELK



-----Original Message-----
From: Bruce Coates <bruce.coates@...>
To: GPSL@groups.io
Sent: Wed, Mar 10, 2021 5:15 pm
Subject: [GPSL] Balloon fight for grade 6 students

Hi

We're in preliminary talks with a local high school to fly a balloon for
a grade 6 class in May or June.  What sorts of experiments, etc have
people found are suitable for this age group?

Thanks

Bruce - VE5BNC





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