James Owen
Well-Known Member
My next HPR project is ambitious, to say the least.
There are a few aspects to the project:
A) send a scratch built rocket over mach 2 on an L1 motor
B) use a completely homegrown avionics + tracking system (I’m working on the necessary FCC stuff)
C) get it all back in one piece.
Current design is a minimum diameter 38mm rocket using a 2ft section of wildman G12-1.5 airframe+ wildman 1.5” nose cone, with airfoiled “bass-glass” fins (CNC cut and sanded to airfoil basswood, “painted” with wood glue, generous fillets, 2-4 layers of 6oz fiberglass). I plan to use home made fly away rail guides.
Deployment of the parachute will be done without any pyrotechnic charges because I was born too darn late and only have jr. L1 (but I have several flights’ worth of HPR experience, including 1 supersonic flight, and I plan to gain a lot more experience by the time this project is going up). Exactly how ejection will be done is undecided, I have a few ideas I’m going to test and see which works best.
Early openrocket “sketch” simulates 10,700’ and mach 2.2 on an I600 redline (one of my favorite motors, I’ve flown one of them so far but hope to fly many more because they’re awesome). First test flight to validate all the systems would be on an H100.
Recovery via a 24” top flight parachute and JLCR, located with a GPS tracker that will be thoroughly tested before being put on the “Risky Business”. Got a nice long Kevlar shock cord from GLR mounted on GLR’s 38mm shock cord hard point.
Avionics are kept mostly in the nose cone, meaning they have to be as small as possible. Going to order some custom PCBs and get lots of soldering practice…
Anyway, let me know what you guys think of this.
Happy rocket-ing!
There are a few aspects to the project:
A) send a scratch built rocket over mach 2 on an L1 motor
B) use a completely homegrown avionics + tracking system (I’m working on the necessary FCC stuff)
C) get it all back in one piece.
Current design is a minimum diameter 38mm rocket using a 2ft section of wildman G12-1.5 airframe+ wildman 1.5” nose cone, with airfoiled “bass-glass” fins (CNC cut and sanded to airfoil basswood, “painted” with wood glue, generous fillets, 2-4 layers of 6oz fiberglass). I plan to use home made fly away rail guides.
Deployment of the parachute will be done without any pyrotechnic charges because I was born too darn late and only have jr. L1 (but I have several flights’ worth of HPR experience, including 1 supersonic flight, and I plan to gain a lot more experience by the time this project is going up). Exactly how ejection will be done is undecided, I have a few ideas I’m going to test and see which works best.
Early openrocket “sketch” simulates 10,700’ and mach 2.2 on an I600 redline (one of my favorite motors, I’ve flown one of them so far but hope to fly many more because they’re awesome). First test flight to validate all the systems would be on an H100.
Recovery via a 24” top flight parachute and JLCR, located with a GPS tracker that will be thoroughly tested before being put on the “Risky Business”. Got a nice long Kevlar shock cord from GLR mounted on GLR’s 38mm shock cord hard point.
Avionics are kept mostly in the nose cone, meaning they have to be as small as possible. Going to order some custom PCBs and get lots of soldering practice…
Anyway, let me know what you guys think of this.
Happy rocket-ing!
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