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Peregrine: Difference between revisions

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[[File:Peregrine-graphics-v1.png|thumb|100px|Possible paint scheme.]]
{{RocketInfoBox
|image        = Peregrine-launch.png
|diameter    = 3.2 inches (79mm)
|length      = 5 feet 4.675 inches (1.64 m)
|dry weight  = 5 lbs. 9 oz. (2.52 kg)
|motor-size  = 75mm
|flights      = 1
|max-altitude = 23248 feet AGL (TeleMega, GPS) (7086 m)
|max-speed    = 1451 ft/sec (989 mph, Mach 1.3) (TeleMega, accelerometer)
|status      = Airframe lost
|simfile      = https://github.com/DanCrank/openrocket-sim-files/blob/master/Peregrine.ork
}}


Peregrine is built from a [https://wildmanrocketry.com/collections/3-fiberglass/products/mach-3 Wildman Mach 3] kit (75mm minimum diameter) and am planning for a launch at Airfest 2024. The flight will be on an [https://aerotech-rocketry.com/products/product_fe1f54bf-9bef-7bef-067f-44f3d7a29d86 AeroTech M685] motor and should exceed 30,000 feet AGL (preliminary simulations are showing 34k-35k). Construction took place between February and August 2024.
Peregrine is built from a [https://wildmanrocketry.com/collections/3-fiberglass/products/mach-3 Wildman Mach 3] kit (75mm minimum diameter) to fly at Airfest 2024 on an [https://aerotech-rocketry.com/products/product_fe1f54bf-9bef-7bef-067f-44f3d7a29d86 AeroTech M685] motor and was expected to exceed 30,000 feet AGL. Construction took place between February and August 2024.
 
At apogee of this first flight, the main shock cord between the coupler and the airframe broke. The nose, coupler and all electronics were recovered after 30 minutes aloft on the main parachute, but the airframe was never located. See the [[2024 Launch Reports|launch report]] for more details.


* Primary altimeter: [https://altusmetrum.org/TeleMega/ Altus Metrum TeleMega] with a single 850mAh battery for electronics and pyro
* Primary altimeter: [https://altusmetrum.org/TeleMega/ Altus Metrum TeleMega] with a single 850mAh battery for electronics and pyro
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* Camera: [https://shop.runcam.com/runcam-5-orange/ RunCam 5 Orange], inside the av-bay looking out horizontally
* Camera: [https://shop.runcam.com/runcam-5-orange/ RunCam 5 Orange], inside the av-bay looking out horizontally
* Motor retention: [https://aeropack.net/pages/min-dia-retainers Aero Pack minimum diameter thread-on retainer]
* Motor retention: [https://aeropack.net/pages/min-dia-retainers Aero Pack minimum diameter thread-on retainer]
* Main recovery: head-end, [https://shop.fruitychutes.com/collections/iris-ultra-standard-chutes/products/iris-ultra-48-standard-parachute-12-5lbs-20fps Fruity Chutes 48" Iris Ultra] (likely won't fit; will probably end up buying a [https://shop.fruitychutes.com/collections/iris-ultra-compact-chutes/products/iris-ultra-36-hp-compact-chute-7lb-20fps-3-9lb-15fps 36" Iris Ultra HP Compact])
* Main recovery: head-end, [https://shop.fruitychutes.com/collections/iris-ultra-compact-chutes/products/iris-42-light-parachute-5-5lbs-15fps Fruity Chutes 42" Ultra Compact Light]
* Apogee recovery: [https://spherachutes.com/products/apex-drogue Spherachutes Apex drogue] (tentative)
* Apogee recovery: [https://topflightrecoveryllc.homestead.com/thinmil.html Top Flight 18" thin-mill X-Type]
* Using [http://www.pro38.com/pdfs/Pro75_dimensions.pdf CTI Pro75 6G motor case] <s>with tailcone closure</s> (discovered CTI tailcone will not fit with AT nozzle &#128557;)
* Using [http://www.pro38.com/pdfs/Pro75_dimensions.pdf CTI Pro75 6G motor case] <s>with tailcone closure</s> (discovered CTI tailcone will not fit with AT nozzle &#128557;)
* Using [https://www.additiveaerospace.com/products/fly-away-rail-guides Additive Aerospace fly-away rail guide]
* Using [https://www.additiveaerospace.com/products/fly-away-rail-guides Additive Aerospace fly-away rail guide]
* Tip-to-tip fiberglass fin reinforcement
* Tip-to-tip fiberglass fin reinforcement
TODO: put an abridged version of the build diary here


<gallery mode="slideshow">
<gallery mode="slideshow">

Latest revision as of 10:16, 19 November 2025

Peregrine is built from a Wildman Mach 3 kit (75mm minimum diameter) to fly at Airfest 2024 on an AeroTech M685 motor and was expected to exceed 30,000 feet AGL. Construction took place between February and August 2024.

At apogee of this first flight, the main shock cord between the coupler and the airframe broke. The nose, coupler and all electronics were recovered after 30 minutes aloft on the main parachute, but the airframe was never located. See the launch report for more details.

TODO: put an abridged version of the build diary here

  • A rocket leaving pad 86 at Argonia with a bright white exhaust and a large plume of white smoke. A fly-away rail guide can be seen detaching from the rocket.
    Peregrine launch, seen from pad camera.
  • Screenshot of OpenRocket showing a basic design for a 3 inch minimum diameter rocket with 4 fins.
    Peregrine design in OpenRocket.
  • White fiberglass fins attached to a red fiberglass body tube, with black (ProLine) fillets.
    Initial attachment of fins with fillets.
  • From the inside of the body tube, showing the footprint of the fillets showing through.
    The fins' "footprint" on the tube.
  • A paper fin template next to a piece of fiberglass fabric cut to the same shape.
    Cutting fabric for the tip-to-tip layup.
  • Two photos of a drop of water on one of the fiberglass fins. In the top photo, the water is beaded up into a taller, rounder drop; in the bottom, the water has spread out showing that the surface is rough enough to break the water's surface tension.
    Doing a water-break test to show when the surface was rough enough for layup.
  • The Peregrine rocket in a plastic and wood fin jig, with the fins resting on wood planks wrapped with wax paper.
    Fin jig constructed for the layup.
  • Same setup as the previous photo, with gallon ziploc bags of water on top of the fins.
    First layup; bags of water are used to press down on the peel ply.
  • Fins with cured fiberglass tip-to-tip layup.
    First layup after curing.
  • Closeup of the layup on a fin showing that the fabric was not pressed down fully to the surface.
    Layup after trimming; adhesion was poor in spots, as shown.
  • TeleMega and EasyMini boards attached to a 3D printed sled and partially wired.
    "Back" side of sled with the TeleMega, EasyMini and pin switches.
  • An orange action camera and two LiPo batteries attached to the other side of the sled.
    "Front" side of sled with the RunCam and two LiPo batteries.
  • A red fiberglass coupler with a circular hole in the switch band, behind which is the lens of the camera previously shown.
    The sled inside the coupler, showing the port hole for the camera.
  • The sled previously shown, with additional wiring and the TeleGPS antenna taped down to a piece of clear plastic with red electrical tape.
    The sled with completed wiring and lexan antenna support.
  • The rocket painted gray with a yellow nose cone.
    Painted.
  • The rocket with yellow letters spelling "peregrine" in all caps, and yellow stripes on the fins.
    Graphics applied.
  • Peregrine on launch pad with a large "86" sign behind it. The sky is partly cloudy.
    On the pad, waiting for a break in the clouds.
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