New Missile Works stuff coming... - Northern Colorado Rocketry

This topic has 52 replies, 11 voices, and was last updated 17 years, 4 months ago by Dr. Michael Sutter DC.

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June 7, 2007 at 3:55 am #39877
Anonymous
Some of you may have seen the prototype altimeter that Jim Amos had at MHM. I took the liberty of cut and pasting his features and benefits from another forum. See below:

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40K capable.
4X accuracy over the old RRC2 (with new calibration instrument).
No programming DIP switches… all interactive programming.
Last flight data stored in EEPROM and retrievable across power cycles.
Flexible event control with individual drogue/main timing stages.
3 modes of operation (standard dual, redundant drogue, redundant main).
Same output terminal sizes as the original RRC.
Dedicated terminals for power switch, battery, and deployment charges.
Toggle Switch selection of 2 independent setpoint profiles.
29mm friendly and about 2.5″ long.
Audible continuity on pad and post flight apogee chirp (same as RRC2).
9V battery operation.

Setpoints:
Main AGL: 300-3000 ft in 100′ increments
Mach Inhibit: 0-30 seconds
Drogue Delay: 0-15 seconds
Main Delay: 0-15 seconds
Deployment mode: (described above)
Operations mode: high-low chirp tone / power-up status chirp
Last Flight Data in EEPROM:
Apogee AGL (ft)
Peak Velocity (ft/sec)
Time to apogee (sec)
Total launches (cumulative counter)

Diagnostics:
Direct battery voltage measurement (1/10 volt resolution)
Direct MSL altitude measurement (check ambient pressure offset)
Continuity input test
Output integrity test

Priced at or below the current RRC2 offering ($90).

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I especially like the peak velocity feature! Very nice!
June 7, 2007 at 4:07 am #44628
Bruce R. Schaefer
YESSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS!!!!!!!!!!!!!!!

And WHEN can these be purchased? 8)
June 7, 2007 at 5:48 am #44629
Bret Packard
Participant
not soon enough! 😀
June 7, 2007 at 2:05 pm #44630
Anonymous
Jim said he hoped to have some by LDRS. I requested s/n 0000001 🙂
June 7, 2007 at 2:50 pm #44631
Bruce R. Schaefer
I requested s/n 0000001

Ha! Well, one’s going in my L3 bird that’s for sure!
June 7, 2007 at 2:53 pm #44632
Anonymous
I especially like the max velocity (in fps) reading. Pretty clever… it just takes the value from one reading and compares it to the prior value and converts that to feet-per-sec and stores the highest value.

Earlier I had said I was never going to push my J570 rocket again, but now I want to know if I broke 2,000fps (I think I did). Very cool feature…
June 7, 2007 at 4:17 pm #44633
Greg Rapp
Participant
the timing of this could be fortuitous, as i’m just getting ready to by my first alt …. but i really want complete flight logging, like mawd does, so i can download the data into a spreadsheet and generate all kinds of interesting, and worthless, charts. it doesn’t sould like this will do that – only a few pieces of flight data. is this correct, or am i missing something?
June 7, 2007 at 4:32 pm #44634
Anonymous
That’d be a question for Jim, I think the list I posted was a partial list of features and benefits…. not sure what (if anything) is downloadable. Jim’s unit is pretty all-encompassing, so he may have you covered.

I went away from the MAWD to the HA-45 as I needed the higher altitude capability. One really cool thing the HA-45 and Jim’s new unit have is an audible battery check. When you power up the HA-45, one of the things it beeps out is voltage. So… if you hear 9 beeps, a pause, and then 4 beeps, you know your 9v battery has (in this case) 9.4v of power.

That sort of thing is really cool if you prep a week or two ahead of time and you worry about a slow drain on your battery… or if you forgot to check it when you put it in. I’m glad Jim put this into his design.
June 7, 2007 at 5:10 pm #44635
Greg Rapp
Participant
so, other than the mawd, what other data logging altimeters would you recommend?
June 7, 2007 at 5:17 pm #44636
Anonymous
so, other than the mawd, what other data logging altimeters would you recommend?

I’m the wrong guy to ask 🙂 I don’t do data logging. FWIW, I bought the MAWD (and later the HA45) because I needed something to fit a 24mm tube. The fact that the HA45 also goes to 40K+ was a bonus. I used the HA45 in my J570 shot last week that got to ~23K MSL. That ebay is very tiny, and I just didn’t have room for a conventional RRCX-40K. Jim’s new unit is going to be quite small, which makes me very happy.

I did splurge and get the MAWD cable, but never once plugged it in…
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