News about Near Space Expedition I
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Monroe
Jun 11, 2009, 9:42:07 PM6/11/09
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The Sonde and payload was recovered by a Farmer in Manor, Tx Today.
We are hopeing the camera did it's job and we have some great video
from Near Space!!! standby for more info.
Monroe
We are hopeing the camera did it's job and we have some great video
from Near Space!!! standby for more info.
Monroe
MisterQED
Jun 11, 2009, 10:54:17 PM6/11/09
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Congratulations, so how far did the payload go horizontally?
MisterQED
Team Daedalus
MisterQED
Team Daedalus
Monroe
Jun 11, 2009, 11:16:57 PM6/11/09
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I'm thinking 12 miles but I'm checking there was no wind that day to
speak of and it was changing directions we know it was up there at
least 2hr. or so. Because of the secondary transmitter It must have
made it to Near Space. If the video played out we will know for sure!
Monroe
Team Prometheus
Tim Heine a farmer near Manor found it in his field. We are going to
meet with him in the morning at 9:00 let you know as soon as we know
about the video. The payload is intact he says and the camcorder has a
2G SD card so it should be there if it recorded anything.
speak of and it was changing directions we know it was up there at
least 2hr. or so. Because of the secondary transmitter It must have
made it to Near Space. If the video played out we will know for sure!
Monroe
Team Prometheus
Tim Heine a farmer near Manor found it in his field. We are going to
meet with him in the morning at 9:00 let you know as soon as we know
about the video. The payload is intact he says and the camcorder has a
2G SD card so it should be there if it recorded anything.
N-prize
Jun 12, 2009, 4:49:22 AM6/12/09
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Good luck! Here's hoping you have some nice pics. You may find a single frame in the middle showing a closeup of a 747 with lots of passengers pointing at the camera....
=======================
Paul H. Dear,
Chief Optimist.
The N-Prize,
PO Box 1133,
Sawston,
Cambridge CB22 3WB
England.
=======================
Monroe
Jun 12, 2009, 9:11:15 AM6/12/09
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It went 14 miles QED.
Thanks Paul
There were buzzards circling we may get a birds eye view :)
Thanks for the luck I'm about to leave to retrive the payload!
Monroe
Thanks Paul
There were buzzards circling we may get a birds eye view :)
Thanks for the luck I'm about to leave to retrive the payload!
Monroe
Monroe
Jun 12, 2009, 11:53:09 AM6/12/09
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We have video!!!!!
1.45hr. Wow out package was so light it went WAY up there! The balloon
pop is not even in the 1.45hrs that's better than we hoped for!
Will be posting soon!
Monroe
1.45hr. Wow out package was so light it went WAY up there! The balloon
pop is not even in the 1.45hrs that's better than we hoped for!
Will be posting soon!
Monroe
N-prize
Jun 12, 2009, 12:08:21 PM6/12/09
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Yeeeeehar! Looking forward - let us know as soon as it's up.
Blair - decals - excellent idea! I'll get onto it.
To all: apologies if I'm neglecting the forum for the next few days - looming deadline, but I'll be back!
Best,
Paul
Pete (Nebula)
Jun 12, 2009, 2:38:31 PM6/12/09
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Hi Monroe
Can't wait to see your near-space video - I love this kind of thing.
Did your Sonde recover via a chute, or did it survive a low-mass
landing?
Best
Pete
Can't wait to see your near-space video - I love this kind of thing.
Did your Sonde recover via a chute, or did it survive a low-mass
landing?
Best
Pete
Blair Gordon
Jun 12, 2009, 2:48:56 PM6/12/09
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Paul, I have the equipment to make the decals, aircraft grade vinyl
lettering :)
lettering :)
N-prize
Jun 12, 2009, 3:00:00 PM6/12/09
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Hi Blair,
If you're after a small contract..... I'll be back to this after my deadline next week.
Best,
Paul
On 12 Jun 2009, at 19:48, Blair Gordon wrote:
Paul, I have the equipment to make the decals, aircraft grade vinyllettering :)
Monroe
Jun 12, 2009, 3:09:17 PM6/12/09
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Pete
I believe it could have survived a low mass landing but I think the
parachute worked.
The quality of the video is not quite par but will do for our first
Mission.
I'll post a teaser.
Monroe
I believe it could have survived a low mass landing but I think the
parachute worked.
The quality of the video is not quite par but will do for our first
Mission.
I'll post a teaser.
Monroe
Monroe
Jun 12, 2009, 4:52:37 PM6/12/09
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You guy's get to see the first Picture!
WayupNSE1
Pretty far up there!
What do you think?
There's a ton of work to do on this Video I'm going to be up all
night.
Monroe
Yep, thats our's :)
WayupNSE1
Pretty far up there!
What do you think?
There's a ton of work to do on this Video I'm going to be up all
night.
Monroe
Yep, thats our's :)
Pete (Nebula)
Jun 12, 2009, 5:01:46 PM6/12/09
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Outstanding Monroe! Very well done.
Best
Pete
Best
Pete
Maxwell
Jun 12, 2009, 5:07:22 PM6/12/09
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Pete beat me to it - superb!! Well done Monroe, well done Team
Prometheus!!
Prometheus!!
Monroe
Jun 12, 2009, 6:09:18 PM6/12/09
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Thanks Guy's It was a long time coming!
2 more missions and we launch from here!
Here we come!
Monroe
2 more missions and we launch from here!
Here we come!
Monroe
Monroe
Jun 12, 2009, 7:28:22 PM6/12/09
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More photo's up!
Monroe
Monroe
N-prize
Jun 13, 2009, 5:53:22 AM6/13/09
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Hi Monroe,
The altitide graph - is that showing up to 35 kilometers??
P
On 13 Jun 2009, at 00:28, Monroe wrote:
More photo's up!Monroe
Monroe
Jun 13, 2009, 4:39:50 PM6/13/09
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Nope
The battery died on the sonde at 35k/ft thats where we lost data
totaly.
On the pressure chart we can deturmine the rate of climb. This was
steady so our final altitude was in the 90k/ft range because the video
recorded for 1hr. 45min. and the balloon never embolised on the video.
I think it went higher but I cant prove it. It works out higher but we
are going to stick with 80-90k/ft.
Dave is working all the harder for the next mission so we get all the
data.
One more mission like this with complete sucess and we move to the
launch platform for a test and then we launch from 90+ k/ft.
Of course this is if our first Launch platform test goes as planed. :)
The battery died on the sonde at 35k/ft thats where we lost data
totaly.
On the pressure chart we can deturmine the rate of climb. This was
steady so our final altitude was in the 90k/ft range because the video
recorded for 1hr. 45min. and the balloon never embolised on the video.
I think it went higher but I cant prove it. It works out higher but we
are going to stick with 80-90k/ft.
Dave is working all the harder for the next mission so we get all the
data.
One more mission like this with complete sucess and we move to the
launch platform for a test and then we launch from 90+ k/ft.
Of course this is if our first Launch platform test goes as planed. :)
N-prize
Jun 13, 2009, 4:43:20 PM6/13/09
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Ah - well, 80-90,000ft would be very nice. Anything from the video?
P
Monroe
Jun 13, 2009, 5:31:39 PM6/13/09
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I'm paying out the stuff fast as I can I'm very tired. But working.
Monroe
A lot of influx going on here slows me down and wears me out.
Monroe
A lot of influx going on here slows me down and wears me out.
MisterQED
Jun 13, 2009, 9:57:29 PM6/13/09
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I can't believe the camcorder kept recording at more than 50 below.
Or is that less than?
Did you have insulation on the Sonde?
You didn't show any in the pictures.
People usually put about 3/4 of foam around the flight package only
leaving the camera lens, antennas and sensors sticking out.
Congratulations again.
MisterQED
Team Daedalus
Or is that less than?
Did you have insulation on the Sonde?
You didn't show any in the pictures.
People usually put about 3/4 of foam around the flight package only
leaving the camera lens, antennas and sensors sticking out.
Congratulations again.
MisterQED
Team Daedalus
Monroe
Jun 13, 2009, 11:15:26 PM6/13/09
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QED
Did you notice how tiny our little package is? The batterys keep the
sonde warm because everything is so compact! there is thin insolation
inside the sonde and thats all that was required. It got -60 before we
lost data can you believe it wow it's cold at 35k/ft a better photo of
the sonde is the recovery photo at the bottom of the page with me
holding it. I have discovered why the GPS malfunctioned and Pete was
right. Above the ground the beeline interfered with the GPS signals on
the ground I guess reflections for some reason let it work, but in the
air it interfered. We have solved the problem with a timmer circut
that will trigger the transmit of the signal insted of a constant
cairrer.
Monroe
Did you notice how tiny our little package is? The batterys keep the
sonde warm because everything is so compact! there is thin insolation
inside the sonde and thats all that was required. It got -60 before we
lost data can you believe it wow it's cold at 35k/ft a better photo of
the sonde is the recovery photo at the bottom of the page with me
holding it. I have discovered why the GPS malfunctioned and Pete was
right. Above the ground the beeline interfered with the GPS signals on
the ground I guess reflections for some reason let it work, but in the
air it interfered. We have solved the problem with a timmer circut
that will trigger the transmit of the signal insted of a constant
cairrer.
Monroe
Pete (Nebula)
Jun 14, 2009, 5:33:34 AM6/14/09
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Hi Monroe
Time-division multiplexing is exactly the way to solve that particular
problem. However, the GPS will need a couple of minutes of
uninterrupted satellite location and characterisation at power-up.
After that, you might want to avoid interrupting it more frequently
than once per second. After training, GPS units use data stored during
the training period to reaquire the satellites after LoS very quickly,
but you'll need to experiment to find out just how quickly your unit
will do it.
I'm sure you know this already, but I'd feel daft not to mention it.
On the subject of operating in low temperatures with most commercial
devices only being specified down to -10 degC, its not as big a deal
as you might think. This lower limit refers to the startup temperature
of the device, ie there is more than 5% failure if startup is
attempted below this temperature.
All the while a device is running it generates its own heat which
means that once started it will run to much lower temperatures than
those specified.
However, the real reason is the definition of temperature at altitude.
You get lower temperatures at higher altitudes not so much because
there are low energy molecules coming into contact with you and making
off with your energy, but more because there is a lack of high energy
particles smashing into you and replacing the energy you lose from
radiation because the air density is lower. The real problem with
operating electronics in LEO, is actually cooling since all the energy
loss is only radiative (ie no convection). For this reason, all
devices are usually bonded to common heatsinks which transfer the heat
away to an external radiator. Then there is the problem of shielding
from the sun ...
Best
Pete
Time-division multiplexing is exactly the way to solve that particular
problem. However, the GPS will need a couple of minutes of
uninterrupted satellite location and characterisation at power-up.
After that, you might want to avoid interrupting it more frequently
than once per second. After training, GPS units use data stored during
the training period to reaquire the satellites after LoS very quickly,
but you'll need to experiment to find out just how quickly your unit
will do it.
I'm sure you know this already, but I'd feel daft not to mention it.
On the subject of operating in low temperatures with most commercial
devices only being specified down to -10 degC, its not as big a deal
as you might think. This lower limit refers to the startup temperature
of the device, ie there is more than 5% failure if startup is
attempted below this temperature.
All the while a device is running it generates its own heat which
means that once started it will run to much lower temperatures than
those specified.
However, the real reason is the definition of temperature at altitude.
You get lower temperatures at higher altitudes not so much because
there are low energy molecules coming into contact with you and making
off with your energy, but more because there is a lack of high energy
particles smashing into you and replacing the energy you lose from
radiation because the air density is lower. The real problem with
operating electronics in LEO, is actually cooling since all the energy
loss is only radiative (ie no convection). For this reason, all
devices are usually bonded to common heatsinks which transfer the heat
away to an external radiator. Then there is the problem of shielding
from the sun ...
Best
Pete
N-prize
Jun 14, 2009, 5:40:37 AM6/14/09
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This may be a very very silly suggestion, but if the problem is reflected signals from the ground, would you be able to screen the receiver with a simple layer of foil below it to cut off the reflected signals but allw above-the-horizon signals through?
Pete (Nebula)
Jun 14, 2009, 5:52:05 AM6/14/09
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Hi Paul
I think Monroe was saying that it worked on the ground because of,
rather than in spite of, reflections (although I suspect it was more
to do with ground absorbtion and package orientation during test) -
Monroe please feel free to rubbish this in case I misunderstood.
Placing metal or foil in the proximity of an antenna will always
affect its characteristics, usually in undesirable ways since (among
other things) the characteristic impedance will change. However, once
correctly matched, a well placed reflector/ground plane can make an
antenna highly directional as you suggest.
Best
Pete
> =======================- Hide quoted text -
>
> - Show quoted text -
I think Monroe was saying that it worked on the ground because of,
rather than in spite of, reflections (although I suspect it was more
to do with ground absorbtion and package orientation during test) -
Monroe please feel free to rubbish this in case I misunderstood.
Placing metal or foil in the proximity of an antenna will always
affect its characteristics, usually in undesirable ways since (among
other things) the characteristic impedance will change. However, once
correctly matched, a well placed reflector/ground plane can make an
antenna highly directional as you suggest.
Best
Pete
>
> - Show quoted text -
N-prize
Jun 14, 2009, 5:57:15 AM6/14/09
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Aha - that makes sense! Ah well.
Another thought - if I understand correctly, the camera kept working after the sonde stopped giving altitude data. Should it not be possible to calculate the altitude from the photos (eg, angular size of known ground features, or the curvature of the horizon on the images)?
P
Pete (Nebula)
Jun 14, 2009, 6:11:16 AM6/14/09
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Yes, definitely. Curvature is the best bet, but in order to do that
you'd need to know the field of view of the camera lense though and
this is entirely dependent on the make of camera used. Monroe should
be able to get this figure from the data sheet though.
P'
you'd need to know the field of view of the camera lense though and
this is entirely dependent on the make of camera used. Monroe should
be able to get this figure from the data sheet though.
P'
N-prize
Jun 14, 2009, 6:16:45 AM6/14/09
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But also, if there are images at known altitudes before the sonde died, they could be used to calibrate the lens?
P
Pete (Nebula)
Jun 14, 2009, 6:25:32 AM6/14/09
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Oh yes. I'd be surprised if Monroe didn't have pictures of the inside
of his room during testing. He could directly measure the size of some
static objects and the distance they were away from the test bench to
do his calibration. Its best to do this test for objects in the centre
of the field of view to avoid distortion effects.
P'
of his room during testing. He could directly measure the size of some
static objects and the distance they were away from the test bench to
do his calibration. Its best to do this test for objects in the centre
of the field of view to avoid distortion effects.
P'
Monroe
Jun 14, 2009, 6:30:59 AM6/14/09
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Good Morning! Gentlemen
Pete
Your are correct it was because of.
We are going with 5sec. intervals.
You would love this little helical GPS antenna on the sonde it's so
cool :)
The beeline transmitter was 2meter with a simple stiff copper wire
about 6-7 inches long (Omni)
It was horizontal on the opposite side of the Helical about an inch
lower
The sonde antenna hangs below and is stainless I believe and is not
far off the 2meter band so it is about the same length
I cant believe I missed that during the test.
Monroe
Pete
Your are correct it was because of.
We are going with 5sec. intervals.
You would love this little helical GPS antenna on the sonde it's so
cool :)
The beeline transmitter was 2meter with a simple stiff copper wire
about 6-7 inches long (Omni)
It was horizontal on the opposite side of the Helical about an inch
lower
The sonde antenna hangs below and is stainless I believe and is not
far off the 2meter band so it is about the same length
I cant believe I missed that during the test.
Monroe
Monroe
Jun 14, 2009, 6:54:23 AM6/14/09
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Hey guy's
Great ideas!
The smart guy's on the team are a little conservitive with the figures
I believe I get about 140k/ft of course I cant be called
conservitive :) But some of the video photo's look a little higher
than average to me. I've spent a lot of time looking at other Near
Space photo's. But anyway the camera was a cheapie.
The video is WILD! and by that I mean it will make you sick to watch
it! I need a program that will do slow motion so I can post something!
The best I'm going to be able to do is short slomotion clips.
You should try watching an hr 45min of wildly swing/spin video and
trying to catch snapshots! and then try and optimize them in photoshop
from a crapy camera!
We need a good cheap small camcorder with a 3hr. duration (all
contradictions)
Monroe
I wonder if a swivel and a weather vane would control some of that?
For our next mission?
Monroe
Great ideas!
The smart guy's on the team are a little conservitive with the figures
I believe I get about 140k/ft of course I cant be called
conservitive :) But some of the video photo's look a little higher
than average to me. I've spent a lot of time looking at other Near
Space photo's. But anyway the camera was a cheapie.
The video is WILD! and by that I mean it will make you sick to watch
it! I need a program that will do slow motion so I can post something!
The best I'm going to be able to do is short slomotion clips.
You should try watching an hr 45min of wildly swing/spin video and
trying to catch snapshots! and then try and optimize them in photoshop
from a crapy camera!
We need a good cheap small camcorder with a 3hr. duration (all
contradictions)
Monroe
I wonder if a swivel and a weather vane would control some of that?
For our next mission?
Monroe
Pete (Nebula)
Jun 14, 2009, 7:00:18 AM6/14/09
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Morning Monroe
I've always loved those quadrifilar antennas, you get so much out of
such a compact design. You're in good company too since they were in
almost constant use on the early communications satellites (before
unfurling parabollic dishes became the norm).
Pete
I've always loved those quadrifilar antennas, you get so much out of
such a compact design. You're in good company too since they were in
almost constant use on the early communications satellites (before
unfurling parabollic dishes became the norm).
Pete
Pete (Nebula)
Jun 14, 2009, 7:06:18 AM6/14/09
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Just an idea, but I think the way to control a wildely rotating camera
might be to mount a the whole lot in a pipe of adequate dimensions and
use two balloons - one at each end. On the upside, you'll eliminate
torquing on the suspsnsion lines that way. On the downside, its two
balloons.
Pete
might be to mount a the whole lot in a pipe of adequate dimensions and
use two balloons - one at each end. On the upside, you'll eliminate
torquing on the suspsnsion lines that way. On the downside, its two
balloons.
Pete
Monroe
Jun 14, 2009, 7:15:43 AM6/14/09
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Pete
I think we, well no. Hummm. I was thinking of loading the sonde up in
our 4" dia. 9ft rocket with an N motor and launching it from 90 or so
k but I just relised the parachute proably cant be designed well
enough to slow the desent down from whatever altitude it would make it
to. And even if it deployed on another balloon say with 40cf of helium
I wonder what altitude it would make? or if we could get it to hang
long enough to get a GPS fix?
Monroe
I think we, well no. Hummm. I was thinking of loading the sonde up in
our 4" dia. 9ft rocket with an N motor and launching it from 90 or so
k but I just relised the parachute proably cant be designed well
enough to slow the desent down from whatever altitude it would make it
to. And even if it deployed on another balloon say with 40cf of helium
I wonder what altitude it would make? or if we could get it to hang
long enough to get a GPS fix?
Monroe
Pete (Nebula)
Jun 14, 2009, 7:23:53 AM6/14/09
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Sorry Monroe, I'm not sure if I put it right - I didn't mean one
balloon followed by another, I meant two balloons at the same time
with the equipment strung below them both.
The balloons will keep a horizontal seperation because of their width,
and this will eliminate the torquing that's causing your video to
twist violently.
The altitude shouldn't be much different since the balloons will burst
at around 35km however many are used.
Best
Pete
balloon followed by another, I meant two balloons at the same time
with the equipment strung below them both.
The balloons will keep a horizontal seperation because of their width,
and this will eliminate the torquing that's causing your video to
twist violently.
The altitude shouldn't be much different since the balloons will burst
at around 35km however many are used.
Best
Pete
Monroe
Jun 14, 2009, 7:59:41 AM6/14/09
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Pete
Yep, I changed the subject daydreaming.
umm. Yes, Jp has a tandem design.
Our drag line was way to dang long too.
Our parachute was too big and it needs a hole in the top so it wont
drift so far.
We were lucky it drifted almost as far on the way down as it did on
the way up.
The next launch pretty much same as first except
better camera
a swivel and vane or something
shorter drag line
modified parachute
li-poly rechargable battery
secondary transmitter not constantly running open
> > Monroe- Hide quoted text -
Yep, I changed the subject daydreaming.
umm. Yes, Jp has a tandem design.
Our drag line was way to dang long too.
Our parachute was too big and it needs a hole in the top so it wont
drift so far.
We were lucky it drifted almost as far on the way down as it did on
the way up.
The next launch pretty much same as first except
better camera
a swivel and vane or something
shorter drag line
modified parachute
li-poly rechargable battery
secondary transmitter not constantly running open
Monroe
Jun 14, 2009, 8:14:43 AM6/14/09
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Pete
I was talking about a balloon launch of the rocket from 90k and then
deploying another balloon and sonde at apogee.
a larger balloon with the same amount of gas so less pressure in it.
say 200 or so k/ft theoretically I think 240k is the limit.
The same balloon with less gas would go higher right? why not a bigger
balloon with the same amount of gas?
But is there really a point to be made? I'm not sure.
Monroe
I was talking about a balloon launch of the rocket from 90k and then
deploying another balloon and sonde at apogee.
a larger balloon with the same amount of gas so less pressure in it.
say 200 or so k/ft theoretically I think 240k is the limit.
The same balloon with less gas would go higher right? why not a bigger
balloon with the same amount of gas?
But is there really a point to be made? I'm not sure.
Monroe
Monroe
Jun 14, 2009, 8:18:48 AM6/14/09
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I don't think a CF bottle could handle the pressure difference it wont
fit ect...
Stupid idea never mind just daydreaming.
fit ect...
Stupid idea never mind just daydreaming.
Monroe
Jun 15, 2009, 2:57:08 PM6/15/09
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Richard Hauser
Jun 15, 2009, 3:19:21 PM6/15/09
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Wow, but not a video for the easily motion sick or those prone to
seisures. Is this the first of several as it still looked like blue
sky and I wanted to see the black sky of space.
MisterQED
Team Daedalus
--
Sent from my mobile device
seisures. Is this the first of several as it still looked like blue
sky and I wanted to see the black sky of space.
MisterQED
Team Daedalus
Sent from my mobile device
N-prize
Jun 15, 2009, 4:44:07 PM6/15/09
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Yo Monroe,
Excellent! It's fantastic, movement or not. I'm surprised there's so much wind noise (since the balloon moves with the wind), but I guess most of it is the camera swinging. Towards the end, where the camera is catching glimpses of the deep blue sky.....awesome!
For some reason, it only runs up to 8:46 and then stops (even though Youtube says it's 10:09 long, and tries to load the rest). Any idea what altitude is reached by the end of the vid? Was that the point where the camera died?
Monroe, Prometheans - well done, truly, and congratulations.
Best,
Paul
N-prize
Jun 15, 2009, 5:04:28 PM6/15/09
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Hi again,
My mistake - the video loaded for the full 10:09 in the end. Interesting noises at about 9 minutes - any idea what they were?
P
Monroe
Jun 15, 2009, 5:30:14 PM6/15/09
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well, it's there but thats compressed to 10min.
It swings to wildly (light payload on long string) the only way to do
that is to frame grab :(
But anyway I've played wit all that enough! We are moving on now to
the next mission.
Thats all you get its just too poor to mess with anymore.
Looking forward to Next mission.
Monroe
It swings to wildly (light payload on long string) the only way to do
that is to frame grab :(
But anyway I've played wit all that enough! We are moving on now to
the next mission.
Thats all you get its just too poor to mess with anymore.
Looking forward to Next mission.
Monroe
N-prize
Jun 15, 2009, 5:33:17 PM6/15/09
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Do you know what altitude the video goes up to? Does it end where the camera died?
Monroe
Jun 15, 2009, 5:43:23 PM6/15/09
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Yes, The horizontal antenna from the beeline.
Joseph Teichman
Jun 15, 2009, 7:29:56 PM6/15/09
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Nice vid!
Any thoughts about launching from such an unstable platform?
Monroe
Jun 15, 2009, 7:53:06 PM6/15/09
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Oh! :)
Thats just a hello to near space from Team Prometheus. We just blew
her a kiss.
Stand by for a far better mission. We have aquired a NICE professional
HD camera (and big) for a following mission don't be fooled by this
little kiss.
We have delayed the next mission while we decide what we can do now
and how we are gonna do it. It also depends on how much of an
investment others are willing to make.
Monroe
Thats just a hello to near space from Team Prometheus. We just blew
her a kiss.
Stand by for a far better mission. We have aquired a NICE professional
HD camera (and big) for a following mission don't be fooled by this
little kiss.
We have delayed the next mission while we decide what we can do now
and how we are gonna do it. It also depends on how much of an
investment others are willing to make.
Monroe
Stew
Jun 15, 2009, 11:31:34 PM6/15/09
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Hi Guys,
Just a thought, when I saw the video I was thinking about the
vibration problem and the first thing I thought of was adding damping
somehow. Some things I know that have been done to add structural
damping on vehicles are long flexible antennas and liquid sloshing in
tanks. Unless we need a tank of something already, that would mean
adding mass, but the antenna idea might work. A couple of long
fiberglass rods to add rotational inertia and damping, perhaps?
Stew
Just a thought, when I saw the video I was thinking about the
vibration problem and the first thing I thought of was adding damping
somehow. Some things I know that have been done to add structural
damping on vehicles are long flexible antennas and liquid sloshing in
tanks. Unless we need a tank of something already, that would mean
adding mass, but the antenna idea might work. A couple of long
fiberglass rods to add rotational inertia and damping, perhaps?
Stew
Monroe
Jun 15, 2009, 11:47:26 PM6/15/09
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Stew
Welcome!
And thanks for the input!
Humm antennas Hummm
Liquid humm
Interesting!
Monroe
Welcome!
And thanks for the input!
Humm antennas Hummm
Liquid humm
Interesting!
Monroe
Monroe
Jun 16, 2009, 12:57:42 AM6/16/09
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Stew
Hahahaha!
your on our team!
Oh! well I didn't relize that untill I saw your post on the Space
Fellowship!
I hope you can post here most of the guy's on the team are very shy it
seems!
Anyway welcome again!
Stew is an Aerospace Engineer guy's
Hey! I have some video of "Frank" lifting off but we were preping Quad
and I missed the rest sorry.
You can have what I've got if you want it!
Monroe
Hahahaha!
your on our team!
Oh! well I didn't relize that untill I saw your post on the Space
Fellowship!
I hope you can post here most of the guy's on the team are very shy it
seems!
Anyway welcome again!
Stew is an Aerospace Engineer guy's
Hey! I have some video of "Frank" lifting off but we were preping Quad
and I missed the rest sorry.
You can have what I've got if you want it!
Monroe
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