Ozark Arts 2

[pmlkid]

Ok guys that have this altimeter let me know what you think should i go for it and buy it..

[THier]

I own three ARTS version1,, if and when I need new altimeters,, they will be ARTS. Great product.

Tom

[quickburst]

I have one and like it a lot. If used in the single battery configuration they can be a bit picky about ematch selection, but if you use the two battery configuration there are no problems.

So ..... the arts is good and be sure to use two batteries.

[ben_ullman]

I have one and like it a lot. If used in the single battery configuration they can be a bit picky about ematch selection, but if you use the two battery configuration there are no problems.

So ..... the arts is good and be sure to use two batteries.

you can use one but you need to put it in 2 battery mode and "manually" wire one battery to the 2 spots on the terminal block. Its a flaw they fixed in the ARTS 3 AFAIK.

I own 2 and love them both! Get one!

Ben

[troj]

ARTS - People seem to either love 'em or hate 'em. I know people who swear by them, and others who swear at them.

I wouldn't suggest one as a first altimeter, but if you're willing to spend the time to learn how to use it, and its quirks (every altimeter on the market has quirks), then it's a viable option.

The ARTS isn't a basic altimeter, so it's a very viable option if you want to do staging, airstarts, etc.

-Kevin

[ben_ullman]

ARTS - People seem to either love 'em or hate 'em. I know people who swear by them, and others who swear at them.

I wouldn't suggest one as a first altimeter, but if you're willing to spend the time to learn how to use it, and its quirks (every altimeter on the market has quirks), then it's a viable option.

The ARTS isn't a basic altimeter, so it's a very viable option if you want to do staging, airstarts, etc.

-Kevin

Kevin makes a very good point. I bought one on the field and sat and read the manual that night at the hotel. I feel like I am pretty good with electronics so I picked it up fast and its easy to use. But there are easier hook up' and go altimeters out there if thats what you want, but this is def. worth the money.

Ben

[mIcahel]

you can use one but you need to put it in 2 battery mode and "manually" wire one battery to the 2 spots on the terminal block. Its a flaw they fixed in the ARTS 3 AFAIK.

I own 2 and love them both! Get one!

Ben

How old is your firmware? I fly ARTS2 w/1 battery in 1 battery mode (jumper on) and low current igniters.

Other good pts about ARTS2:

comes with cable for connect to PC (as opposed to $20-$30 option w/others

accelo-based apogee good for beginners. advanced functions don't make regular single and dual deploy any harder to setup.

[cwbullet]

I keep hearing about a mythical arts3. Is this thing ever going to be released?

[Adrian A]

You may also want to take a look at the Raven altimeter. There's a comparison table for the full-featured altimeters on the market at the bottom of the Raven page.

[THier]

I keep hearing about a mythical arts3. Is this thing ever going to be released?

As soon as I buy an ARTS2,, the threes will be avail.

Tom

[tfish]

Tom. Then, hurry up and buy one so we can all get our ARTS 3.

Tony

[THier]

You may also want to take a look at the Raven altimeter. There's a comparison table for the full-featured altimeters on the market at the bottom of the Raven page.

Yea,, looks good,, but I am from the "if it ain't broke,, don't fix it" So I have a ard time switching from something I have had great experiences with using,, but make me an offer I can't refuse,,,,,
Looks like a good unit though, does it do accel apogee detection? I am toying with an idea,, and not sure how well the Baro will work.

Tom

[THier]

Yea,, looks good,, but I am from the "if it ain't broke,, don't fix it" So I have a ard time switching from something I have had great experiences with using,, but make me an offer I can't refuse,,,,,
Looks like a good unit though, does it do accel apogee detection? I am toying with an idea,, and not sure how well the Baro will work.

Tom

I just answered my own question,, downloaded the Ops manual,, looks like it DOES accel based deployment.

Tom

[Adrian A]

Yea,, looks good,, but I am from the "if it ain't broke,, don't fix it" So I have a ard time switching from something I have had great experiences with using,, but make me an offer I can't refuse,,,,,
Looks like a good unit though, does it do accel apogee detection? I am toying with an idea,, and not sure how well the Baro will work.

Tom

I understand about staying with a product that works for you.

Yes, the Raven does accel apogee detection as the default. The default second channel is low-altitude deployment, and the 3rd and 4th channels are set up as backup channels for the apogee and low-altitude deployments, respectively. So you can hook it up and fly it right out of the box, without ever hooking it up to a computer.

With one battery you have full-current capability on all 4 of the Raven's output channels. There is a aerogel supercapacitor that holds up the altimeter power for up to 15 seconds while charges are firing.

The Raven's deployment channels have lots of other flexibility that's available with the interface GUI, that you can use for airstarts and staging. For example, you can set up an airstart so that it won't ignite unless the rocket is above a specified altitude before a specified time. That way, if the rocket is going sideways, the upper stage won't send it into the next county.

The Raven has a simulated flight feature that lets you test and record a realistic flight from your desktop. You can attach real charges or ignitors, along with your flight battery, and test that all the charges are firing at the time you expect them to. The simulated flight is recorded just like a real flight, so it's easy to see from the graphs within the Featherweight Interface Program things like the voltage on each of the channels, the deployment current when the charges were firing, etc.

And of course, the Raven is much smaller, especially compared to a 2-battery setup.

The baro sensor is a digital output sensor that's factory calibrated to provide 0.3% accuracy over a wide temperature range, and it outputs valid data to up to 100,000 feet.

The accelerometer has a specified G range of 70 Gs (really more like 80), and a lateral accel axis that provides data that can be interesting for seeing how far into the flight the rocket was weathercocking, how many times it bounced on the launch rail, etc.

[Larry Curcio]

Ok guys that have this altimeter let me know what you think should i go for it and buy it..

I own two. I find them simple to use, and they give reliable data. (And I'm a data wonk) It's much like the RDAS Mini but a lot cheaper. (Actually, the Mini is no longer available.)

Three minor complaints:

1) They are big compared to more recent units;

2) The altimeter is calibrated for such a broad range of altitudes it stair steps a lot in flights below 3000 feet; and

3) One of the two stopped working properly after its second flight. But... stuff happens

-Larry Curcio

[JDcluster]

I have 10+ flights some some of my ARTS units.

I'm a bit puzzled by number 2?

I've had quite a few flights under 3k & still no problems....



JD

I own two. I find them simple to use, and they give reliable data. (And I'm a data wonk) It's much like the RDAS Mini but a lot cheaper. (Actually, the Mini is no longer available.)

Three minor complaints:

1) They are big compared to more recent units;

2) The altimeter is calibrated for such a broad range of altitudes it stair steps a lot in flights below 3000 feet; and

3) One of the two stopped working properly after its second flight. But... stuff happens

-Larry Curcio

[pmlkid]

Well i have 2 Perfectflight Mawd and 2 Missleworks altimeters.now would like to try something new. Now were to buy it from

[JDcluster]

You have to send in the Raven to have the firmware updated, with the ARTS you can do it yourself.......


JD

I understand about staying with a product that works for you.

Yes, the Raven does accel apogee detection as the default. The default second channel is low-altitude deployment, and the 3rd and 4th channels are set up as backup channels for the apogee and low-altitude deployments, respectively. So you can hook it up and fly it right out of the box, without ever hooking it up to a computer.

With one battery you have full-current capability on all 4 of the Raven's output channels. There is a aerogel supercapacitor that holds up the altimeter power for up to 15 seconds while charges are firing.

The Raven's deployment channels have lots of other flexibility that's available with the interface GUI, that you can use for airstarts and staging. For example, you can set up an airstart so that it won't ignite unless the rocket is above a specified altitude before a specified time. That way, if the rocket is going sideways, the upper stage won't send it into the next county.

The Raven has a simulated flight feature that lets you test and record a realistic flight from your desktop. You can attach real charges or ignitors, along with your flight battery, and test that all the charges are firing at the time you expect them to. The simulated flight is recorded just like a real flight, so it's easy to see from the graphs within the Featherweight Interface Program things like the voltage on each of the channels, the deployment current when the charges were firing, etc.

And of course, the Raven is much smaller, especially compared to a 2-battery setup.

The baro sensor is a digital output sensor that's factory calibrated to provide 0.3% accuracy over a wide temperature range, and it outputs valid data to up to 100,000 feet.

The accelerometer has a specified G range of 70 Gs (really more like 80), and a lateral accel axis that provides data that can be interesting for seeing how far into the flight the rocket was weathercocking, how many times it bounced on the launch rail, etc.

[pmlkid]

You have to send in the Raven to have the firmware updated, with the ARTS you can do it yourself.......


JD

Oh yea JD thats a plus in my book plus there was someone said it was big ?

[Larry Curcio]

I have 10+ flights some some of my ARTS units.

I'm a bit puzzled by number 2?

I've had quite a few flights under 3k & still no problems....



JD

Fair enough...

Here is a low-altitude flight of a vulcanite. Note that the barometric curve is rough. I use the barometric curve when I analyze off-vertical flights like this one. In some contexts, they have to be numerically differentiated. The better the resolution, the better the derivatives. Most people don't do that, but it's still nice to have smooth curves. It isn't important at all for deployment.

Regards,
-LarryC

[dwright1542]

I keep hearing about a mythical arts3. Is this thing ever going to be released?

Not mythical actually.....unfortunately like all of us, Erik's life got in the way (1st baby).

The good news is that the board is done. Right now it's DataAnalyzer that is being worked on. Since the 3 is a totally different CPU, and way more capable, much of DA's structure changed.

-Darren

[dwright1542]

ARTS - People seem to either love 'em or hate 'em. I know people who swear by them, and others who swear at them.

I wouldn't suggest one as a first altimeter, but if you're willing to spend the time to learn how to use it, and its quirks (every altimeter on the market has quirks), then it's a viable option.

The ARTS isn't a basic altimeter, so it's a very viable option if you want to do staging, airstarts, etc.

-Kevin

I'd love to hear from the guys who swear at them....why do they swear at them?

[THier]

Not mythical actually.....unfortunately like all of us, Erik's life got in the way (1st baby).

The good news is that the board is done. Right now it's DataAnalyzer that is being worked on. Since the 3 is a totally different CPU, and way more capable, much of DA's structure changed.

-Darren

SEE I TOLD ALL OF YOU,,, I just bought an ARTS2,,, NOW progress being reported on the 3

Tom

[pmlkid]

This thing does a lot of neat stuff bought mine from hanger 11 one thing that i hate is the data cable is not Usb

[JDcluster]

Maybe by the fall?

I just flew the ARTS 1 that he fixed for me & it worked like as intended.






JD

[jderimig]

Hey JD,

Why the big discrepancy between Accel and Baro alts, and the accel apogee well after the baro? Was the flight significantly off vertical?

--jd

[sylvie369]

I was wondering why the descent rate under main was 367 MPH (=
539 fps).

Was this flight, um, "special"?

(and if so, how did the ARTS survive?)

[JDcluster]

No, apparently the deployment charge reset the altimeter.
The data drops off just after the main chute. I just tested the battery & still comes up 10+ volts.


It has a weird way of calculating it.
Most of the time I ignore the decent rate anyhow.


JD

I was wondering why the descent rate under main was 367 MPH (=
539 fps).

Was this flight, um, "special"?

(and if so, how did the ARTS survive?)

[JDcluster]

I'm not really sure....
I setup to almost vertical although it was a little breezy on the ground at least.
I just ran WRASP & plugged in the numbers from the flight & it says it should have hit 7,800 ft with an AMW K 800 which would be the closest commercial motor to what I made.

Watch the on board video & tell me what you think?

http://www.youtube.com/watch?v=<object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/hfimXVHXooY&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/hfimXVHXooY&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>


JD

Hey JD,

Why the big discrepancy between Accel and Baro alts, and the accel apogee well after the baro? Was the flight significantly off vertical?

--jd

[jderimig]

Watch the on board video & tell me what you think?

JD

From the video I think the flight was pretty much straight up and it nailed apogee on the deployment.

I am guessing the accelerometer alt is closer to the truth.