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- Dec 18, 2010
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TRF,
One issue discussed at our final design review is altimeter coordination.
This rocket is recovered in four chunks to reduce recovery stress and to limit parachute size. Independent altimeters will be required to operate in sequence and as if a single coordinated system. The question at review is can several RRC-3 altimeters achieve that coordination.
It was decided to test a sample system we named The Gadget. Pictured below The Gadget is built from 4-inch LOC paper tube. Each section is separated by an altimeter bay with switch band colored grey. Three altimeters recover The Gadget in 5 pieces sequentially from bottom to top. The first event is booster at apogee. Each subsequent section is deployed 1 second after the previous.
The 84 cubic-inch altimeter canisters are ported through a single ¼-inch hole. The lowest altimeter is programmed mode 3. The middle altimeter is programmed mode 2 and two seconds delay. The upper altimeter is programmed mode 2 and three seconds delay.
Results are favorable EXCEPT that one parachute failed to exit the uppermost white section. In Redstone we plan to use tethered deployment bags.
Feckless Councel
[video=youtube;x2jjxWq0Jqw]https://www.youtube.com/watch?v=x2jjxWq0Jqw&index=4&list=PL2LMq2TTPTZoZqDzecaoEbxW9Sv0fU3Rb[/video]
One issue discussed at our final design review is altimeter coordination.
This rocket is recovered in four chunks to reduce recovery stress and to limit parachute size. Independent altimeters will be required to operate in sequence and as if a single coordinated system. The question at review is can several RRC-3 altimeters achieve that coordination.
It was decided to test a sample system we named The Gadget. Pictured below The Gadget is built from 4-inch LOC paper tube. Each section is separated by an altimeter bay with switch band colored grey. Three altimeters recover The Gadget in 5 pieces sequentially from bottom to top. The first event is booster at apogee. Each subsequent section is deployed 1 second after the previous.
The 84 cubic-inch altimeter canisters are ported through a single ¼-inch hole. The lowest altimeter is programmed mode 3. The middle altimeter is programmed mode 2 and two seconds delay. The upper altimeter is programmed mode 2 and three seconds delay.
Results are favorable EXCEPT that one parachute failed to exit the uppermost white section. In Redstone we plan to use tethered deployment bags.
Feckless Councel
[video=youtube;x2jjxWq0Jqw]https://www.youtube.com/watch?v=x2jjxWq0Jqw&index=4&list=PL2LMq2TTPTZoZqDzecaoEbxW9Sv0fU3Rb[/video]