mperegrinefalcon
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Hello all, here is my plan for my L3. I have a limited time to build this as I have a specific date I need to launch by. I ordered all the components today, I also have a Loki M2550 on order for the flight.
The launch will be the first weekend of June, so I will need to work quickly but thoroughly. This is a fairly simple build, so I have no worries about getting it done in time. For those interested my proposal is attached.
L3 Certification Proposal
Matthew Slater, NAR 103600
For my level 3 certification I would like to make a 4” diameter rocket with a 3” motor mount made out of filament wound fiberglass. It has 3 fins and 3 strakes, and is 110” long. I will have an on-board Mobius camera, and it will be held on the rail by two 1010 rail buttons screwed into weld nuts. Minimum rail length: 72”
The motor I am choosing for this flight is the Loki M2550
Loki M2550 16,022 feet 449 m/s NCR North Site standing waiver is 20,00
Fins and mounting:
The fins have a 25” root and are 4.2” tall. They are also 3/16” thick. The FinSim data also reports that this design is capable of this flight.
I plan to epoxy the fin root in place, then inject West Systems epoxy mixed with fiberglass dust and fumed silica as internal fillets. Rocketpoxy will be used for the rest of the construction.
The fins would be beveled and mounted through the wall. I would inject epoxy and pull the fillets inside the rocket body. Rocketpoxy will be used for 1" diameter external fillets
Shear Pins:
I will use three #4-40 shear pins to hold the nosecone to the payload section, and the Av-Bay to the booster. LumaDyne Aluminum Tube Fasteners will be used to hold the paylod section to the Av-Bay.
Recovery:
Recovery will be carried out by an 84” Fruity Chutes Classical parachute. The predicted final weight of the rocket is about 20 pounds. With the case it is predicted at 24 pounds after the propellant has burned. The predicted decent rate is 19.5 FPS with this parachute.
Electronics:
The main deployment will be carried out by an RRC3 altimeter with the backup being an Telemetrum. I will have separate batteries, charges, and switches. I will use rotary switches for both electronics. All of this will be mounted on a 1/16” thick G10 sled with ¼” launch lugs epoxied on to it. The batteries will be zip tied to the sled and the electronics mounted with 4-40 nylon standoffs. Note: The raven has been replaced by an RRC3.
I will use aluminum charge cups to hold the black powder. I will use two, 1 cell, 250 milliamp batteries for power.
UPDATE:
The switch wire terminals on the Telemetrum will be jumped with some wire and the switch will be added between the battery and the device.
Tracking:
I will use the Telemetrum in the Av-Bay and a TeleGPS in the nosecone for tracking. This way I have redundant systems for tracking the flight. I will talk to Bdale about how I should set this up.
Launch date planned:
I am hoping to be able to fly this at Mile High Mayhem, 2019. The first weekend of June.
Let me know what you guys think of this plan for an L3.
-Matthew
The launch will be the first weekend of June, so I will need to work quickly but thoroughly. This is a fairly simple build, so I have no worries about getting it done in time. For those interested my proposal is attached.
L3 Certification Proposal
Matthew Slater, NAR 103600
For my level 3 certification I would like to make a 4” diameter rocket with a 3” motor mount made out of filament wound fiberglass. It has 3 fins and 3 strakes, and is 110” long. I will have an on-board Mobius camera, and it will be held on the rail by two 1010 rail buttons screwed into weld nuts. Minimum rail length: 72”
The motor I am choosing for this flight is the Loki M2550
Loki M2550 16,022 feet 449 m/s NCR North Site standing waiver is 20,00
Fins and mounting:
The fins have a 25” root and are 4.2” tall. They are also 3/16” thick. The FinSim data also reports that this design is capable of this flight.
I plan to epoxy the fin root in place, then inject West Systems epoxy mixed with fiberglass dust and fumed silica as internal fillets. Rocketpoxy will be used for the rest of the construction.
The fins would be beveled and mounted through the wall. I would inject epoxy and pull the fillets inside the rocket body. Rocketpoxy will be used for 1" diameter external fillets
Shear Pins:
I will use three #4-40 shear pins to hold the nosecone to the payload section, and the Av-Bay to the booster. LumaDyne Aluminum Tube Fasteners will be used to hold the paylod section to the Av-Bay.
Recovery:
Recovery will be carried out by an 84” Fruity Chutes Classical parachute. The predicted final weight of the rocket is about 20 pounds. With the case it is predicted at 24 pounds after the propellant has burned. The predicted decent rate is 19.5 FPS with this parachute.
Electronics:
The main deployment will be carried out by an RRC3 altimeter with the backup being an Telemetrum. I will have separate batteries, charges, and switches. I will use rotary switches for both electronics. All of this will be mounted on a 1/16” thick G10 sled with ¼” launch lugs epoxied on to it. The batteries will be zip tied to the sled and the electronics mounted with 4-40 nylon standoffs. Note: The raven has been replaced by an RRC3.
I will use aluminum charge cups to hold the black powder. I will use two, 1 cell, 250 milliamp batteries for power.
UPDATE:
The switch wire terminals on the Telemetrum will be jumped with some wire and the switch will be added between the battery and the device.
Tracking:
I will use the Telemetrum in the Av-Bay and a TeleGPS in the nosecone for tracking. This way I have redundant systems for tracking the flight. I will talk to Bdale about how I should set this up.
Launch date planned:
I am hoping to be able to fly this at Mile High Mayhem, 2019. The first weekend of June.
Let me know what you guys think of this plan for an L3.
-Matthew