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Peregrine: Difference between revisions

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* 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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