CarVac
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Since I'm now feeling confident about using the body tube I made, and now that it and the nosecone and fin stock are currently post-curing, I decided to start a build thread for the rocket that I've dreamed of making ever since I found out about this motor: a minimum mass Aerotech I1299 Warp Nine rocket.
It's also to one-up all of the H410 min-d rockets that have been popping up like mushrooms lately: this currently simulates to accelerate at a peak of 231 G's, pushing the limits of even the 250G Raven I'm using for deployment.
I tend to scratch build my rockets, but this one is more completely scratch-built: the only parts I won't have made are a Blue Tube coupler for an AV-bay (it's hard to get good OD tolerances), the electronics, the parachute, and the motor.
View attachment Disappearing_Act.ork Note: lotsa comments on the parts in the sim file, for those who are curious.
The nosecone I turned from balsa wood, for minimum mass. The body tube I laid up out of fiberglass in three separate steps: two layers of plain weave fiberglass uncompressed, then 5 or 6 layers of longitudinal unidirectional S-glass (it was hard to tell how many) vacuum bagged for minimum resin content, and then 3 more layers of plain weave. This was made with PTM&W 5712, the same high-temperature epoxy CCotner and I used/will use on Bare Necessities.
The fincan is a short section that I vacuum bagged a while back on a nylon mandrel; it's 3 layers of carbon/Kevlar twill, with carbon oriented circumferentially. This was laid up with Aeropoxy 2032/3660.
The fins are 1/16" G10 core, with one layer of 5.7 ounce carbon fiber twill on each side laid up with PTM&W 5712.
For electronics, I have a short section of Blue Tube 38mm coupler for an AV-bay. In it are nestled an Altus Metrum Telemini for tracking and a Featherweight Raven2 250G for deployment and data logging.
I'm using an 18" Spherachute as my main, bundled up with an Archetype cable cutter for dual deploy. The 1/8" Kevlar shock cord is anchored to the motor using the cut-off end of a dead (anodizing was dissolved off) Aerotech 29/180 case. A few holes drilled in it accommodate the shock cord, and it screws onto the forward closure of an Aerotech Electronic Forward Closure instead of the EFC electronics.
Photos will come later, since the post-curing cycle is running right now.
Either everyone will get whiplash watching this thing go, or nobody will even see it. It will leave a 4-foot tower at 225 feet per second, and it will break Mach at 85 feet above ground level. OpenRocket says it'll hit around 7300 feet, while RASAero claims about 10,000, but it's not gonna be the most aerodynamically clean rocket so I'm leaning towards believing OR on this one.
It's also to one-up all of the H410 min-d rockets that have been popping up like mushrooms lately: this currently simulates to accelerate at a peak of 231 G's, pushing the limits of even the 250G Raven I'm using for deployment.
I tend to scratch build my rockets, but this one is more completely scratch-built: the only parts I won't have made are a Blue Tube coupler for an AV-bay (it's hard to get good OD tolerances), the electronics, the parachute, and the motor.
View attachment Disappearing_Act.ork Note: lotsa comments on the parts in the sim file, for those who are curious.
The nosecone I turned from balsa wood, for minimum mass. The body tube I laid up out of fiberglass in three separate steps: two layers of plain weave fiberglass uncompressed, then 5 or 6 layers of longitudinal unidirectional S-glass (it was hard to tell how many) vacuum bagged for minimum resin content, and then 3 more layers of plain weave. This was made with PTM&W 5712, the same high-temperature epoxy CCotner and I used/will use on Bare Necessities.
The fincan is a short section that I vacuum bagged a while back on a nylon mandrel; it's 3 layers of carbon/Kevlar twill, with carbon oriented circumferentially. This was laid up with Aeropoxy 2032/3660.
The fins are 1/16" G10 core, with one layer of 5.7 ounce carbon fiber twill on each side laid up with PTM&W 5712.
For electronics, I have a short section of Blue Tube 38mm coupler for an AV-bay. In it are nestled an Altus Metrum Telemini for tracking and a Featherweight Raven2 250G for deployment and data logging.
I'm using an 18" Spherachute as my main, bundled up with an Archetype cable cutter for dual deploy. The 1/8" Kevlar shock cord is anchored to the motor using the cut-off end of a dead (anodizing was dissolved off) Aerotech 29/180 case. A few holes drilled in it accommodate the shock cord, and it screws onto the forward closure of an Aerotech Electronic Forward Closure instead of the EFC electronics.
Photos will come later, since the post-curing cycle is running right now.
Either everyone will get whiplash watching this thing go, or nobody will even see it. It will leave a 4-foot tower at 225 feet per second, and it will break Mach at 85 feet above ground level. OpenRocket says it'll hit around 7300 feet, while RASAero claims about 10,000, but it's not gonna be the most aerodynamically clean rocket so I'm leaning towards believing OR on this one.