Transcript St. Vincent- St. Mary

Preliminary Design Review
Rocket & Payload Schematic
Apogee and
ejection of
drogue
parachute
Payload and main
chute deployment
Lift Off
Rocksim
predicted
trajectory
of rocket
Airship
Main parachute
Deployment of
main parachute
and Airship
Rocket body
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The vehicle body tubes will be made of
cardboard because of its cost and strength to
weight ratio.
The Nose Cone will be made of Polystyrene
because of its weight versus strength against
other materials.
Both the Main Parachute and the Drogue
Parachute will be made of rip-stop nylon.
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The thrust-to-weight ratio is:28.65
The rail exit velocity will be: 73.6 ft/s
The static stability margin is: 2.56
The current motor selected is a: Cesaroni
K660. This choice came from vigorous testing
in Rocksim to achieve the desired height.
Rocket with Cesaroni K660
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These components: airship, Tygon tubing,
gas canister, electronics bay; will have
repeated static testing.
Parachute charges will be static tested at
various points in the design process.
Half-Scale Rocket will be made and tested
several times before launch day.
A test flight of the main vehicle will be done
to confirm rocket stability as required.
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Before launch, the team will confirm they
have telemetric contact with the rocket.
Altimeters will be checked prior to launch.
All power supplies (batteries) will be checked
before launch to ensure they are at maximum
capacity.
The parachutes will be checked several times
for proper folding.
Black powder charges will be checked by
advisors before loading the charges into the
rocket.
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Team will confirm they have telemetric
contact and radio contact with the airship
prior to putting the rocket on the pad.
Team will confirm airship is connected
correctly to the gas tubing.
Air canisters will be checked prior to launch
for correct capacity and pressure.
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The total mass of the vehicle and payload is expected
to be 23 pounds at liftoff. The mass was used to
calculate the ideal parachute for the rocket.
Recovery systems are attached using half-inch shock
chord fastened through an eyebolt. The eyebolts will
be fastened to bulkheads fitted inside of the airframe
and securely set using epoxy.
At the end of the shock chord there is a one thousand
pound rated swivel to which the parachute will attach.
In order to keep the sustainer section attached to the
rest of the vehicle after drogue chute deployment the
drogue chute is attached to both the sustainer
section and the electronics bay (EBay).
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At the end of the shock chord there is a one
thousand pound rated swivel to which the
parachute will attach. In order to keep the
sustainer section attached to the rest of the
vehicle after drogue chute deployment the
drogue chute is attached to both the
sustainer section and the electronics bay
(EBay).
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The vehicle has a dual deployment system.
Carrying a drogue and a main parachute, the
vehicle deploys them via the use of an
altimeter activated deployment charges. The
drogue chute is positioned in the sustainer
section and is deployed at an altitude of one
mile (agl). Once the altimeter reads 5,280
feet, an electrical charge will set off two
deployment charges. Then, the pressure built
up inside of the airframe will separate the two
tubes releasing the drogue parachute.
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As the rocket begins its decent with the
deployed drogue chute, the altimeter will be
waiting until the vehicle reaches the height of
1,000 feet and at that point will again trigger
two deployment charges. These two will be
position in the payload section just above the
air tank and separated by three bulkheads.
The pressure created will push out the nose
cone deploying the airship and the main
parachute.
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The airship, to perform correctly must inflate
in the air and release when instructed from
the falling rocket body. To do this, the air
canisters in the payload section of the rocket
will be on a remote controlled valve system.
This system will allow ground personnel to
open them and allow the gas inflate the
airship at 1000 ft., after the main parachute
is deployed.
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The airship will also have a motored system
that is radio controlled. It allows ground
personnel to direct the airship’s flight
pattern. This system allows the airship to
land safely and accurately
A radio controlled tether release will be used
on the airship after it has fully inflated.
Finally, the airship will hold a steady-cam
camera that takes video during its flight. The
camera will continuously send data back to
the ground station during the entire trip.
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The Rocket will have an electronics bay inside
containing the ejection charged wired to
altimeters. At specified altitudes the ejection
charges will go off, ejecting the drogue and
main parachutes as planned. The main
parachute will eject at around 1000 feet, to
give the airship time to inflate and deploy.
End