Altimeters

Here are the specifications and documentation for various rocketry altimeters that I use.


Blacksky Altacc2A/2C: USER MANUAL

  • Recovery modes: Main only with inertial acceleration integration to detect minimum velocity, equivalent to peak altitude. Drogue with inertialacceleration integration to peak followed by programmable Main at user selected barometric low altitudes.
  • Altitude readout: status LED flashes peak barometric altitude in thousands and hundreds of feet to 16K feet.
  • Low altitude recovery: Programmable 600, 1200, and 2400 200/-0 feet (180, 360, and 720 +60/-0 meters).
  • Acceleration measurement range: +25 g’s and +50 g’s. Acceleration can exceed set point without damage, however, some data will be lost.
  • Lift-off detection: 1.0 g for 0.25 seconds
  • Pressure Altitude Range/Resolution: 0 to 15K is +105 feet (0 to 4570 + 30 meters); 15.1 to 30K is +420 feet (4610 to 9140 + 120 meters); >30.1Kdata may not be valid.
  • Flight data storage time: 4.25 minutes
  • Dimensions: 1.1” Wide x 3.5” Long x 1.5” High (30. x 91 x 38mm)
  • Weight (w/ and w/o 9v battery): 1.3 oz (37gms) / <2.8 oz (78gms)

Missile Works RRC2 (Rev.C): USER MANUAL

  • Main deployment ranges Hi: 1000/500 ft. AGL; Lo: 800/300 ft. AGL
  • Minimum altitude for arming 300 ft. AGL
  • Arming mode barometric
  • Firing Current 1.25 amps @ 1 sec
  • Operational range 0-25,000 ft. MSL
  • Dimensions 1.30" W x 5.9" L
  • Weight 3.4 oz. w/battery
  • Battery onboard 9V
  • Nominal Battery load 15ma

Missile Works RRC2x (Rev.B): USER MANUAL

  • Main deployment (40K) Hi: 2500'/1500' AGL; Lo: 2000'/1000' AGL
  • Main deployment (25K) Hi: 1000'/500' AGL; Lo: 800'/300' AGL
  • Minimum altitude for arming 300 ft. AGL
  • Arming mode barometric
  • Firing Current 1.25 amps @ 1 sec
  • Operational range 25K/40K MSL
  • Dimensions 1.30" W x 3.61" L
  • Weight 0.91 oz. / 26 gm.
  • Battery  External 8-12 VDC
  • Nominal Battery load 15ma

G-Wiz LCX: USER MANUAL

  • 3 Outputs:
  • Pyro output 1 - Jumper select between Launch detect (for clusters) and Burnout detect (for staging)
  • Pyro output 2 - Fires at Apogee detect.  Inertial Apogee is standard, and used by default. Apogee detection based on Accelerometer datais not subject to problems with Mach transition.  Apogee detection based on Barometric data works better in cases like strap-on boosters,where tumbling may occur.
  • Pyro output 3 - Can be set to fire a number of seconds after inertial apogee (ARLISS mode).
  • Fires at a configurable low altitude, defaults to 800’. Can be configured in range of 10 to 2550 feet or meters in 10 (foot or meter) increments.
  • All Outputs have optional timer with 1/8 sec resolution.
  • Can handle up to 4 stages.
  • If a timer is used on a stage output, and Apogee is detected before the timer ends, the output will be inhibited as a safety feature.
  • Beeper shows readiness at launch, and maximum altitude upon landing, Pyro Battery level and continuity of each output.
  • Altitude is Barometric based.
  • Barometric sensor accurate to over 70,000’
  • Metric or English Altitude readout and specification.
  • Analog to Digital converter reads accelerometer and barometric sensors to 10 bit precision.
  • High performance RISC processor uses proprietary techniques to calculate altitude properly. It does not rely on linear simplifications, butfollows atmospheric pressure to altitude models very closely.
  • High current FET driven pyro outputs are capable of delivering up to 4 amps for a full second, on the cluster / stage output, and 5 amps one theother 2 outputs.
  • Available in 50g (Standard), 100g versions available.
  • Uses 2 batteries to ensure that the battery driving the pyro output does not interfere with the computer.
  • Positive retention header is standard.
  • Unit dimensions: 3.9” x 0.7”

  • Adept22: USER MANUAL

  • Altitude Capability: to 15,000 feet Above Ground Level (AGL), to limit of 15,000 feet Above Sea Level (ASL). Note: the ADEPT22 can actuallymeasure altitudes to 100,000 feet ASL, and apogee detection still functions to 100,000 feet ASL. However, above the normal specified range,accuracy is not guaranteed.
  • Output #1 fires at maximum altitude; Output #2 fires during descent at 1800, 1200, 900, 600, or 300 feet above ground, or 6 seconds afterapogee, or at 150 feet below apogee as selected by the user. The second charge can never fire any sooner than 2 seconds after the first chargefires.
  • Nonvolatile Memory: remembers and reports the altitude of the most recent flight, no matter how long the device has been powered down orlost.
  • Lowest Maximum Altitude Readable: 300 feet AGL
  • Lift-off Detection: Lift-off is detected when the altitude quickly increases by 300 feet.
  • Mach Compatibility:  proprietary Real Time Dynamic Lockout™ system that tracks speed in real time to ignore pressure glitches that occur whentransitioning through the sound barrier, both in and out.
  • Resolution of Measurement: one foot; system uses a logarithmic 18-bit A-to-D converter.
  • Calibration Accuracy Over Specified Range:  +/-1%, typical.
  • Custom altitude sensor that is immune to light, including direct sunlight.
  • Battery Life: up to 48 hours. Battery Current Consumption of the ADEPT22 is only 2.7 mA, so the device can run for a week on a 9-volt alkalinebattery. However, if the unit is being used to fire deployment charges, then the 48 hour specification should be observed; the battery will remainreasonably fresh for up to 48 hours of operation time. Do not substitute an external battery with a voltage less than 7 volts. A 2-cell Li-Po batteryshould be sufficient, but complete pre-testing will be necessary.
  • Altitude Read-out: Piezo beeper reports altitude and operational status including the continuity of the deployment devices. One repeating beep ifneither device has continuity, two beeps repeating if only device #1 has continuity, three beeps if only device #2 has continuity, and four beeps ifboth devices have continuity. The Beeper uses a push-pull driver for increased volume level, loud enough to serve as a location beacon.
  • Dimensions:  0.9” wide by 0.6” thick by 2.8” long and fits inside a tube with a minimum ID of 1.0” (25.4 mm)
  • Weight:  0.4 ounce (12 grams).
  • Battery: one external alkaline 9-volt battery to fire low-current electric match charges.Advanced on-board Voltage Regulator that is totally immuneto reverse voltage (battery in backwards).

  • Transolve P6 & Airstart Board: USER MANUAL

  • Auto-ground elevation subtract.
  • Unit utilizes flashbulbs or low-current electric matches for initiation.
  • On-board beeper signals continuity, altimeter status, and peak readout in feet.
  • User programmable Supersonic Inhibit Delay (SID) for 5, 10 or 15 seconds changeable with jumper blocks.
  • Optional Airstart Board for air-started motors, multi-staging, or special effects.
  • User selectable main parachute opening at 400 or 800 feet.
  • Range: 25,000 ft. (7620 m.)
  • Altitude resolution: 100 ft. (25.4 m.)
  • Dimensions: 1.45 x 4.05 x 0.7 in. (3.56 x 10.2 x 3.05 cm.)
  • Weight: 1.4 oz. (40 g.)
  • Power : 9-volt alkaline battery

  • Transolve BUT-1 Back-Up Timer: USER MANUAL

  • Can be used to air-start motors, multi-stage, or deploy a recovery system.
  • Utilizes flashbulbs or low-current electric matches for initiation.
  • Time delay is user programmable from 5 to 140 seconds, adjustable by 20 turn trim potentiometer.
  • Unit is triggered at launch by microswitch held down by launch rod.
  • Dimensions:  1.4 x 2.75 x 0.6 in. (3.56 x 6.99 x 1.53 cm.)
  • Weight: 1.34 oz. (38.05 g.)
  • Power: 9-volt alkaline battery