Maximum Altitude Altimeter with Dual Deployment™
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ALTS25, Price: $99.00 - Includes CAB6L-24 Interconnect Cable and GP-23A Battery.
ALTS25-60K, Price: $134.00 - Includes CAB6L-24 Interconnect Cable and GP-23A Battery.
The ALTS25 Altimeter with Dual Deployment™ is a maximum altitude altimeter. It measures and reports the maximum above-ground altitude value of a rocket's flight. The ALTS25 also has two altitude controlled deployment switches for firing deployment charges, based on altitude. The first charge fires when the rocket reaches its maximum altitude (apogee), and the second charge fires when the rocket descends to 1,800, 1,200, 900, 600 or 300 feet above ground, or two seconds after apogee, or at 150 feet below apogee (user selectable). One common usage is to deploy a main parachute at apogee by using only the first output. However, the most typical usage is to deploy a drogue chute or streamer first, then to deploy a main parachute when the rocket descends to a user selected altitude above ground (Dual Deployment™), in order to avoid significant drifting due to wind.
This device is used in rockets that will reach at least 300 feet altitude. Either or both deployment switches may be used, or the device may be used as a maximum altitude altimeter only. The ALTS25 may be used in any rocket configuration including multistage rockets, in which case maximum altitude information about a particular stage can be obtained by placing the device in the particular stage of interest. Or individual ALTS25 units (or other altimeter devices) may be placed in each stage of interest to report maximum altitudes obtained by each stage, and/or to handle deployment for each stage.
The ALTS25 precisely captures the highest altitude obtained during a flight to a maximum of 25,000 feet above sea level (by special order, the ALTS25-60K is calibrated to altitudes up to 60,000 feet). The maximum value obtained above the local ground-zero altitude is precisely measured and reported in one-foot increments (one-foot resolution).
The ALTS25 measures 1.4” wide by .6” thick by 3” long. It fits inside a tube with a minimum ID of 1.5” (38 mm). It will also fit on either side of a center divider inside a 54 mm ID bay 3” long. The device weighs only 1 ounce, including the battery. It uses a 12-volt alkaline lighter battery with a battery life up to 6 hours, so you need not be concerned about how long your rocket sits on the launchpad after the unit is powered up. The ALTS25 is a totally stand-alone device including the battery holder, arming mechanism, and current source for firing deployment charges. Nothing more is required except for the wires (interconnect cable) that connect to the On-Off switch and to the deployment charges.
The altimeter uses a custom absolute pressure device to precisely measure altitude values up to 25,000 (or 60,000) feet in one-foot increments. It uses a 17-bit logarithmic analog-to-digital converter to precisely (one-foot resolution) measure the nonlinear pressure versus altitude relationship over this large altitude range. Once powered up, the ALTS25 reports that neither, or one or both deployment charges has continuity. It also constantly measures the ground-level altitude and waits for a quick 300-foot change upward. It then captures the maximum altitude obtained above ground zero. The first deployment switch fires at the very moment when the rocket reaches the maximum altitude. The second switch fires when the descending altitude reaches either 1,800, 1,200, 900, 600 or 300 feet above the ground, (or two seconds after apogee, or 150 feet below apogee) as preset by the user. The ALTS25 uses the copyrighted and patented and trade marked technique of beeping out (blinking on some models) a value to report the maximum altitude value. The beeps can be heard even when the unit is still inside the rocket. The rocketeer knows the maximum altitude as soon as he/she picks it up, or just gets close to it. Note: the ALTS25 cannot be used for, and will not function for, maximum altitudes less than 300 feet.
Additional CAB6L-24 Interconnect Cable
Additional GP-23A Alkaline Lighter Battery; Price: $2.25.
GP-23A50 Alkaline Lighter Batteries (box of 50 at 50% Discount); Price: $56.25.
Shorting Jumpers are used to connect two connecter pins together in order to turn on the power for some of the Adept devices. Shorting Jumpers are also used on some devices to program certain values or functions. They are used on the ALTS25 to program the value for the Second Output Function, the output that fires the Deployment Charge for the Main Parachute.
Chamber, Complete with Bottle
Electronic Instrumentation is not compatible with the fumes and residue created by rocket motors and deployment charges. Seal holes and gaps in bulkheads and such with epoxy or removable putty.
The perfect mate for the ALTS25 when used in a dual redundancy backup system is the DDCS25. The ALTS25 would function as the primary device to measure altitude and to control Dual Deployment™. The DDCS25 would function as the redundant backup device to also control Dual Deployment™. The DDCS25 functions to 60,000 feet. The extended DDCS25-100K version functions to 100,000 feet.
DDCS25 Dual Deployment Controller™
DDCS25-100K Dual Deployment Controller™
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