1. Build

Instrument Cover & Canopy Bow

Adds cover and bow to the Hummel UltraCruiser
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  • Instrument Cover and  Canopy Bow installed

    Instrument Cover and Canopy Bow installed

  • Instrument Cover and  Canopy Bow installed

    Instrument Cover and Canopy Bow installed

  • Fuselage Preparation for Instrument Cover and Canopy Bow installation

    Fuselage Preparation for Instrument Cover and Canopy Bow installation

    The aft ribs have been removed from the Center Wing to facilitate access . Elevator pushrod visible. Black shot bag is used to counter-balance the fuselage when rotating to angled positions.

  • Turtle Deck bow after bending

    Turtle Deck bow after bending

    Used the system described in the plans. Fairly easy. The square block has to be a hardwood. Canopy Bow looked similar ... no photo taken.

  • Louisiana Boys bending bows

    Louisiana Boys bending bows

  • Louisiana Boys bending bows

    Louisiana Boys bending bows

  • Mylar plan on panel ... during final trimming

    Mylar plan on panel ... during final trimming

    Cleco's hold the Instrument Cover and Mylar in place.

  • Close view of Mylar and Cleco

    Close view of Mylar and Cleco

  • Guide bar clamped in place on 2-inch portion of the panel

    Guide bar clamped in place on 2-inch portion of the panel

    Use of OLFA laminate cutter eliminates distortion caused by tin snips.

  • Taped tempered piano wire enables curved cuts.

    Taped tempered piano wire enables curved cuts.

    Buy the wire at any hobby shop that supports RC aircraft. Olfa laminate cutter blade has two ends (reversable). I always number the second end so that I don't reverse back to the used end. Tungsten blade is cheap and lasts. I haven't figured out how to sharpen the blade.

  • Instrument Cover and Canopy Bow - Back Drilling

    Instrument Cover and Canopy Bow - Back Drilling

    The Instrument Cover has been trimmed and is ready for back drilling to match the fuselage rail holes.

  • Instrument Cover and Canopy Bow removed from aircraft after back drilling.

    Instrument Cover and Canopy Bow removed from aircraft after back drilling.

    Rudder kit happened to be laying the table. The bow is actually the windshield bow but the plans refer to it as the Forward Canopy Bow ... hopefully it will match the canopy if/when I buy one.

  • When the panel is attached to the bow, a natural curve is evident.

    When the panel is attached to the bow, a natural curve is evident.

    It lays flat when bow is removed.

  • The holes in the Mylar don't match up with Bulkhead "B"

    The holes in the Mylar don't match up with Bulkhead "B"

    I don't care since back drilling will be used.

  • Flange corners at bend cause an outward dimple.

    Flange corners at bend cause an outward dimple.

    Dent hard to photograph. I use a 3M grinding/polishing wheel to round off the corners so they don't cause a permanent dent in the Instrument Cover panel.

  • Crimped edge lays flat

    Crimped edge lays flat

    Note: angle flanges on the lower left of the image provide a fuselate-to-wing skin connection in place of the large fairings.

  • Crimped edge lays flat

    Crimped edge lays flat

  • Crimped edge lays flat.

    Crimped edge lays flat.

  • Steve Cole's Polished UltraCruiser

    Steve Cole's Polished UltraCruiser

    Instrument Cover and Canopy Bow ... under view

  • Used cord to pull flat against Bulkhead "B"

    Used cord to pull flat against Bulkhead "B"

  • Oshkosh: Dennis Brooks' - Instrument Cover and Canopy Bow

    Oshkosh: Dennis Brooks' - Instrument Cover and Canopy Bow

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    Louisiana Boys bending bows
    Louisiana Boys bending bows
    Mylar plan on panel ... during final trimming