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  1. #1
    I don't know. RB1-luvr's Avatar
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    Altimeter question (I've never used one)

    hey folks,
    I'm thinking of throwing a bicycle computer with altimeter function in the payload section of a model rocket to record how high my flights are. Two questions:

    1. will the altimeter work without a wheel sensor starting things off? In other words does that function work if you just carry it around?

    2. does the max altitude get recorded for viewing later?

    cheers,
    Ian
    Rast ich so rost ich. (When I rest, I rust)

  2. #2
    cab horn
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    Your entire flight height probably falls within the error of the altimeter.

  3. #3
    later free_pizza's Avatar
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    Quote Originally Posted by RB1-luvr
    hey folks,
    I'm thinking of throwing a bicycle computer with altimeter function in the payload section of a model rocket to record how high my flights are. Two questions:

    1. will the altimeter work without a wheel sensor starting things off? In other words does that function work if you just carry it around?

    2. does the max altitude get recorded for viewing later?

    cheers,
    Ian
    you should tie 50 huge spools of thread together and tie it to the rocket
    it may not be as crazy as it sounds

  4. #4
    I don't know. RB1-luvr's Avatar
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    Quote Originally Posted by operator
    Your entire flight height probably falls within the error of the altimeter.

    are you serious? my flights are about 750-1,000 ft.
    Rast ich so rost ich. (When I rest, I rust)

  5. #5
    Fritz M richardmasoner's Avatar
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    Quote Originally Posted by RB1-luvr
    hey folks,
    I'm thinking of throwing a bicycle computer with altimeter function in the payload section of a model rocket to record how high my flights are.
    Use an altimeter designed for model rocketry. I think I paid about $10 for mine. You zero the thing on the ground and the shock of parachute release tells it to remember and display the release altitude. It works very well.

    You can pay $100 for fancy ones that will record the entire flight.

    A bike computer is accurate enough to measure 700 foot flights, but the ones I'm familiar with only look at the altitude once every few seconds. That won't work for a rocket flight.

  6. #6
    Senior Member SanDiegoSteve's Avatar
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    I've got a Polar 720i, and I think it would work, but the polling inerval has a minimum of 5 seconds. Would it even get a reading.

    Do some telemetry. Measure a distance back and then sight it to get an angle. Can then calculate the hight pretty cloesly (at least for basic backyard fun).

  7. #7
    Senior Member Albany-12303's Avatar
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    Dress your altimeter up like an astronaut and pretend to feed it tang!
    2005 Lemond Sarthe
    2000 Trek 2300
    Old Nishiki built up with Sora Brifters & Campy Wheels
    1999 Giant ATX 880 MTB

  8. #8
    I don't know. RB1-luvr's Avatar
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    Quote Originally Posted by CrimsonEclipse
    750-1200?

    3 words

    G Class Engine

    We'll have you makin' sonic booms in no time!

    CE
    ha hah!!! i know man, i'll get to the g class engines someday. for now i'm new at it and putzin with C class engines and scratch built rockets. it started just as a way to fulfill a missed childhood hobby. i do have my eyes on some g/h/i engine rocket kits. maybe by the end of '06 i'll try one.

    thanks for all your replies.
    Rast ich so rost ich. (When I rest, I rust)

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