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MARSA systems inc: Marsa54 flight computer, need opinions.


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  1. #1
    Join Date
    16th August 2011
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    Edmonton, Alberta, CANADA
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    2,891

    MARSA systems inc: Marsa54 flight computer, need opinions.

    Just wondering if anybody has any of the MARSA systems flight computers and how you like them, what you don't like, general opinions, etc.

    I dig the screen.

    http://marsa4.com/jmla/
    Plays with wood, cardboard, and carpenters glue at home.

    "We have done the impossible and that makes us mighty"
    -rocketeers vs. BATF

    Ego intentio parumper perficio fuga , tamen Ego peto a perficio reverto.

  2. #2
    Join Date
    23rd February 2009
    Location
    Northern NJ
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    2,852
    I have one but, have yet to fly it.
    It has allot of options: 4 channels; Kaufman filter; Motor Thrust data; web up-datable...


    JD
    2014
    Flights: 8
    Ns: 6440

    2013 Ns: 8,803

    TRA: 04486 L3
    METRA VP
    MDRA
    URRG

  3. #3
    Join Date
    25th January 2009
    Location
    Glennville, GA
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    12,279

    Marsa 4

    I have one. It has 2 flights on it. It works very well. They are are old larger models so I can only use them in large rockets.
    -----------------------
    Chuck Haislip
    NAR/Tripoli Level 3 Prefect ICBM - TRA #60

    Level 1 - LOC Minie Magg; Level 2 - PR Broken Arrow;
    Level 3 - 10 inch Nike Smoke
    Ns for Year: 2250 but back in the USA. Builds starting today!!!!
    My rockets usually fly naked. If they survive, they earn their paint.

    Come fly with ROSCO or ICBM in Orangeburg SC => http://rocketrysouthcarolina.com/ind...erid=$1-ChuckH

  4. #4
    Join Date
    16th August 2011
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    Edmonton, Alberta, CANADA
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    Quote Originally Posted by cwbullet View Post
    I have one. It has 2 flights on it. It works very well. They are are old larger models so I can only use them in large rockets.
    The new model is considerably smaller. It would fit in a 3" tube with a teeny bit of room to spare on each side. It's not the cheapest, but I'm thinking more along the lines "You get what you pay for".

    I did contact them, and they have no problems shipping to Canada, and the same $7 S&H fee. Not too shabby.
    Plays with wood, cardboard, and carpenters glue at home.

    "We have done the impossible and that makes us mighty"
    -rocketeers vs. BATF

    Ego intentio parumper perficio fuga , tamen Ego peto a perficio reverto.

  5. #5
    Join Date
    25th January 2009
    Location
    Glennville, GA
    Posts
    12,279

    Quality

    It is a fantastic altimeter. More features than I will fully use. My favorite altimeter is the adept 22 followed closely by then Raven.
    -----------------------
    Chuck Haislip
    NAR/Tripoli Level 3 Prefect ICBM - TRA #60

    Level 1 - LOC Minie Magg; Level 2 - PR Broken Arrow;
    Level 3 - 10 inch Nike Smoke
    Ns for Year: 2250 but back in the USA. Builds starting today!!!!
    My rockets usually fly naked. If they survive, they earn their paint.

    Come fly with ROSCO or ICBM in Orangeburg SC => http://rocketrysouthcarolina.com/ind...erid=$1-ChuckH

  6. #6
    Join Date
    12th October 2009
    Posts
    77
    Lots of flights on mine and LOVE it.

    Full confidance in it - Using it for the primary alt on my Level 3 project flying at Red Glare next month.

    It just works great.
    Ray
    Lusby, MD

    TRA 9199, Level 2

  7. #7
    Join Date
    7th March 2012
    Location
    Discovery Bay, CA
    Posts
    154
    Quote Originally Posted by GDJ View Post
    Just wondering if anybody has any of the MARSA systems flight computers and how you like them, what you don't like, general opinions, etc.

    I dig the screen.

    http://marsa4.com/jmla/
    Just picked up the MARSA54 last weekend. No flights yet but have bench tested it several times and played around with programming options. The LCD display is awesome and the menus are very easy to follow. I used a syringe over the barometer and gently pulled on the plunger while watching the LCD screen altimeter (in feet) climb till I stopped. The flight data is displayed on the screen and the piezo beeps out the altitude recorded. Downloaded the data to the computer and reviewed it without issue. Also ran the flight sim mode with ematches attached to Pyro ch 1 and 2. They fired off without an issue. The only thing I can't simulate on the bench is G force but I don't see that being an issue for my rocket. Very nice unit!!!

  8. #8
    Join Date
    18th January 2009
    Location
    Rocky Hill, CT
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    1,685
    I am an emphatic fan of the MARSA line. There is only one tiny thing that confused me. If you test it with the outputs shorted (as opposed to some sort of pyro device) it will error out.
    Al Gloer
    TRA/NAR L3
    President - CATO
    Has been Launch Organizer - LDRS XXXI

  9. #9
    Join Date
    7th March 2012
    Location
    Discovery Bay, CA
    Posts
    154
    Quote Originally Posted by H_Rocket View Post
    I am an emphatic fan of the MARSA line. There is only one tiny thing that confused me. If you test it with the outputs shorted (as opposed to some sort of pyro device) it will error out.
    I tested with ematches connected to the pyro, not shorted. I would think a direct short could damage the unit.

  10. #10
    Join Date
    18th January 2009
    Location
    Rocky Hill, CT
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    1,685
    It will not damage the unit. John built in a safety circuit for that. A short will show a pyro fail during POST.
    Al Gloer
    TRA/NAR L3
    President - CATO
    Has been Launch Organizer - LDRS XXXI

  11. #11
    Join Date
    16th August 2011
    Location
    Edmonton, Alberta, CANADA
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    2,891
    Okay! I'm starting to like this Marsa product more and more!

    Another question for you guys: Batteries.

    What do you use, and what works well, and what to stay away from?
    Plays with wood, cardboard, and carpenters glue at home.

    "We have done the impossible and that makes us mighty"
    -rocketeers vs. BATF

    Ego intentio parumper perficio fuga , tamen Ego peto a perficio reverto.

  12. #12
    Join Date
    18th January 2009
    Location
    Rocky Hill, CT
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    1,685
    Basic run of the mill 9v batteries.
    Al Gloer
    TRA/NAR L3
    President - CATO
    Has been Launch Organizer - LDRS XXXI

  13. #13
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    16th August 2011
    Location
    Edmonton, Alberta, CANADA
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    2,891
    I was considering the rechargeable route. Here's a page that has some pretty cool 9V rechargeables. I'm leaning either towards the 9V/300mA or the 9.6V/230mA to power the MARSA, and the 9V/1200mA battery to fire the pyro/igniters.

    Good idea or too darn heavy?
    Plays with wood, cardboard, and carpenters glue at home.

    "We have done the impossible and that makes us mighty"
    -rocketeers vs. BATF

    Ego intentio parumper perficio fuga , tamen Ego peto a perficio reverto.

  14. #14
    Join Date
    16th May 2011
    Location
    Central California
    Posts
    797
    I love mine I've had the original and the 54 they are great just huge so they have to fly in bigger rockets.

  15. #15
    Join Date
    16th August 2011
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    Edmonton, Alberta, CANADA
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    2,891
    Quote Originally Posted by maxvelocity View Post
    I love mine I've had the original and the 54 they are great just huge so they have to fly in bigger rockets.
    Okay, since you have both, will the MARSA54 model fit in a 3" diameter E-bay?
    Plays with wood, cardboard, and carpenters glue at home.

    "We have done the impossible and that makes us mighty"
    -rocketeers vs. BATF

    Ego intentio parumper perficio fuga , tamen Ego peto a perficio reverto.

  16. #16
    Join Date
    7th March 2012
    Location
    Discovery Bay, CA
    Posts
    154
    Quote Originally Posted by GDJ View Post
    Okay! I'm starting to like this Marsa product more and more!

    Another question for you guys: Batteries.

    What do you use, and what works well, and what to stay away from?
    As mentioned a fresh 9v does the trick. If you really want additional power you can connect 2 9v batteries in parallel. Just be sure that both batteries are fresh or at equal charge if running rechargables so 1 bat isn't trying to recharge the other until they equalize.

    MARSA54 is just under 1 7/8" wide so no problem fitting into a 3".

  17. #17
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    16th August 2011
    Location
    Edmonton, Alberta, CANADA
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    2,891
    Does anybody know the weight of the MARSA4 or MARSA54 computer? I can't find a mass anywhere on the web.
    Plays with wood, cardboard, and carpenters glue at home.

    "We have done the impossible and that makes us mighty"
    -rocketeers vs. BATF

    Ego intentio parumper perficio fuga , tamen Ego peto a perficio reverto.

  18. #18
    Join Date
    20th February 2009
    Location
    Cayuga, Indiana
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    7,085
    Quote Originally Posted by GDJ View Post
    I was considering the rechargeable route. Here's a page that has some pretty cool 9V rechargeables. I'm leaning either towards the 9V/300mA or the 9.6V/230mA to power the MARSA, and the 9V/1200mA battery to fire the pyro/igniters.

    Good idea or too darn heavy?
    The MARSA54 only uses a single battery (no separate pyro).
    L3, TRA #11847
    Tripoli Indiana #132
    Tripoli Central Illinois #59
    Central Illinois Aerospace (NAR) #527
    Chicago Rocket Mafia, "Big Bucks" Dixon
    ___________________________________

    Gravity always wins. -- Radiohead

  19. #19
    Join Date
    23rd January 2009
    Location
    NE Ohio
    Posts
    860
    Quote Originally Posted by GDJ View Post
    Does anybody know the weight of the MARSA4 or MARSA54 computer? I can't find a mass anywhere on the web.
    35g
    John Derimiggio NAR/TRA L3
    Monroe Astronautical Rocket Society

  20. #20
    Join Date
    16th August 2011
    Location
    Edmonton, Alberta, CANADA
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    2,891
    Quote Originally Posted by dixontj93060 View Post
    The MARSA54 only uses a single battery (no separate pyro).
    Okay, that pretty much solves that. I'll go with a single 9.6 Volt rechargeable.

    Quote Originally Posted by jderimig
    35g
    Thank you! I guestimated at 40g.
    Plays with wood, cardboard, and carpenters glue at home.

    "We have done the impossible and that makes us mighty"
    -rocketeers vs. BATF

    Ego intentio parumper perficio fuga , tamen Ego peto a perficio reverto.

  21. #21
    Join Date
    13th April 2012
    Posts
    9
    you still going to build that Exocet for your Cert 1 eh?
    Dual deploying you be trying eh?
    see you tonight, I got lots of questions, like where and when can we launch here in Alberta? and so on and so on.....

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