Description: Purchased for a high powered rocket project that neverflew. Take out of storage and now forsale. Recently tested and works great. The TeleMetrum payload works by sensing the altitude of the rocket. In simple terms, it is an altimeter. But this one is different, it has three sensors and a sophisticated brain and extra hook-ups to send electricity to two different ejection charges.As the rocket takes off, this electronic payload is calculating the altitude of the rocket. When it senses the peak altitude, called apogee, it sends electricity to one of the starters. This starter sets off a small charge of black powder. That pressurizes one section of the rocket and spits out the small parachute (called a drogue chute).While the drogue chute brings down the rocket quickly, the payload is still sensing the altitude of the rocket. When it descends to a pre-programmed height (which you can control), it then triggers a second time. This time it ignites another black powder ejection charge which pushes out the main parachute. Since the rocket is now closer to the ground, the wind really doesn't have the time to push it downrange too far. So it lands slowly, but much closer to the launch pad. That means you don't have to walk very far to retrieve your rocket.Manufactured by: Altus Metrum Purchased from: Apogee ComponentsGeneral Electronics Info Electronics Class: Dual Deploy Weight: 0.71 oz (20.13 g) Dimensions: 1.068"L x 2.75"W x 0.62"H (27mm L x 70mm W x 16mm H ) Min Payload Size 1.14"W x 3"H (29mm W x 76mm H ) Mounting Style: Mounting posts on sledItem Usage Data Downloadable: via Telemetry (AltOS) or USB Use in rockets (Projectile Trajectories)? Yes Use in Kites, Birds, Airplanes, Balloons (Non-Projectile Trajectories)? Yes Launch Trigger: 20m AGL in 5s OR combo 2G accel and 5m/s velocity; Balloon trigger available. Can be used without electronics bay? No TARC Approved? No--------------- Additional Information----------------------------------------------------- The TeleMetrum payload does much more than tell you where the rocket is (a GPS dog tracker mounted in a rocket can do that...)This is the first GPS payload designed specifically for rockets, and not created from off-the-shelf components that are simply spliced together. Because of this, it is smaller, lighter, and has significantly more capability in controlling dual deployment of the rocket's chutes. And all the components are matched together perfectly so things just work without a lot of fuss or electrical interference between components.Know where tour rocket is at all times during the flight...and how high it went...and if the dual-deployment circuits are working correctly...and...Finally, one single small payload gives you all the advanced features you've desired in rocket electronics:GPS Tracking data so you know your rocket's position. Barometric recording altimeter. Barometric pressure sensor good to 45k feet MSL. Allows you to have perfect dual-deployment flights.1-axis 70-g (+/-) accelerometer: Used to verify the speed of the rocket, should the vehicle exceed Mach 1. This simplifies setting up dual-deployment settings because you don't have to worry about mach pressure effects fooling the baro sensor.The accelerometer also works for "motor characterization." This means you'll be able to verify after the launch that your rocket motor produced as much thrust as you expected. You'll be able to see the actual motor's thrust curve after each launch and compare it to the predicted thrust. This is great for people that make experimental rocket motors; you can fly the motors you make, instead of burning them all on a thrust stand just to get a thrust curve.In addition, because of the accelerometer, the payload also knows the rocket's orientation at power-up (nose up, or laying on its side). The TeleMetrum takes advantage of this to make arming of parachute ejection charges safer. With the TeleMetrum, you have the capability of remote arming of rocket on the launch pad (NO other payload can do this!). This means no more risking your neck climbing a wobbly stepladder or a tall launch towers to turn on your vehicle's electronics just prior to launch. You can do it from the safety of your ground station. This greatly speeds up launch preparations out on the pad, which means your high-power friends will thank you for making the range run faster so they can fly their rockets too. Telemetry transmitter (70cm ham band transceiver) allows all the flight data to be seen real-time during the mission. The telemetry system sends flight data 10 times per second during ascent, and once per second after apogee. It also transmits an audio tone once every five seconds that is used for tracking purposes on the ground with a directional rocket locator. The range is over 20 miles (Line-of-sight distance. Of course, this depends on the antenna you connect to the receiver).Dual deployment parachute control - fires two separate ejection charges. The first is fired at apogee. By default, TeleMetrum will fire the main deployment charge at an elevation of 250 meters (about 820 feet) above ground. There is an override command in the software to allow both the apogee and the main chutes to deploy at different altitudes. This "apogee delay" feature is to ensure multiple altimeters don't fire at the same time when you're flying redundant electronics, which is a requirement when flying a Level-3 high-power certification attempt.Onboard non-volatile memory (2 MB) for flight data storage records data at 100 samples/second from the barometer and accelerometer, it also captures data at 3 samples/second for battery voltage, temperature and deployment charge continuity. GPS is recorded once per second. With 2MB of memory onboard, it can capture over 40 minutes of flight data. This allows you to download flight data after the mission is over, just in case your telemetry signal drops out. There's actually more data logged (particularly during the ascent phase) than is sent over the telemetry link, so you'll get a huge data cache after you get your rocket back. And you don't even have to remove the payload from the rocket or hook up any wires. After the rocket has landed and you have it sitting on your prep table, you can simply command it to transmit all its stored flight data to your computer. Functions as a battery charger (Battery not included). It automatically gets recharged whenever the USB cord (included too) is connected to your computer. Use it as a rocket tracker too. You can use your radio direction finder to home in on the rocket should it land in rough scrub or a forested area.Open-source software allows you to expand the functionality of the product should you wish to add extra features.
Price: 300 USD
Location: De Pere, Wisconsin
End Time: 2024-09-01T03:17:30.000Z
Shipping Cost: N/A USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Brand: Altus Metrum
Type: Space Rocket
