Sorceress (oz9173)


Sorceress (oz9173) by Merrill F 1993 - plan thumbnail

About this Plan

Sorceress. 50in slope soarer model. 280 sq in area.

Direct submission to Outerzone.

Update 28/12/2020: Added kit review from Model Builder, June 1994, thanks to RFJ.

Quote: "Products in Use: By Rick Lawrence. MM Glider Tech's 'Sorceress' Slope Glider.

Capitalizing on the success of their Merlin RC hand-launch glider, the folks at MM have come out with an aileron version that's right at home on even the smallest hills.

When MB asked me to review the Sorceress, the newest offering of MM Glider Tech, I accepted immediately. My Merlin (MIA's first kit, which I reviewed in the September '93 MB) is still going strong, and I was eager to try this new higher-performance slope version. The most significant difference between them is that the Merlin is a rudder/ elevator ship with a polyhedral wing, while the Sorceress has an almost-flat wing with ailerons. Like the Merlin, the Sorceress has a two-piece, vacuum-formed ABS polysty-rene fuselage pod(main pod and a hatch). A fiberglass arrowshaft connects the tail group to the pod.

The Sorceress kit is complete with machine-cut ribs, shear webs and tail group, spars, leading and trailing edges, aileron stock, and sheeting for the center section. No push•ods, devises, control horns or hinge material is included in the kit. The cutting and wood quality in my kit was very good.

The Sorceress plans are full size, and the two pages of instructions are enough for an average builder to complete the kit easily. Like the Merlin, the instructions contain no drawings or pictures and do not include basic building techniques. I would therefore not recommend this kit to a new builder unless they have someone help with the building and flying.

CONSTRUCTION: The tail group parts are pre-cut and require only a light sanding on the leading and trailing edges, and shaping the elevator hinge line. I did cut lightening holes in the tail, shown as an option on the plans. Pieces of 1/4-inch triangle stock brace the vertical stab to the horizontal stab and also conned the completed tail assembly to the fiberglass boom.

The Selig 3016 airfoil wing is simple rib-and-spar construction built in four panels, with the ailerons located in the outer panels. Spars are 1/8x1/4 balsa with shear webs in between. All ribs are 1/16 balsa except for the 1/8-inch center rib and the ribs at the joints of the tip and main panels. The two halves are joined with both tips 1/2 inch above the board; 1/16 plywood caps are glued to the front and back of the spars, while the center section is sheeted with 1/16 balsa. A strip of fiberglass cloth is supplied for strengthening the wing joint.

Pushrod sleeves need to be installed in the wing prior to covering. No pushrods are supplied, so I purchased the recommended #507 Sullivan 1/32-inch flexible steel cable pushrods. The pre-shaped aileron stock was drilled for lightening and beveled for the hinge line. The installation of ailerons on such a small wing makes for more work, however the effort is worth it.

The two plastic fuselage pod parts are supplied already cleaned up and free of any mold lines or flash. A hole for the boom needs to be drilled in the aft section of the pod; I used a small hand-held rotary grinder. In order to achieve the proper incidence angle, the boom is glued in place level with the building board. Once dry, the two bulkheads are glued in place. ABS plastic sheet stock is supplied for making the bulkheads. The shapes are shown on the plans; I cut them a little oversize and sanded them to fit. The rear bulkhead holds the front of the boom in place, while the forward bulkhead is for the wing rubber band hook. The canopy is also held in place by a rubber band.

The last step in the pod construction is to add small scrap pieces of the bulkhead plastic sheet to the inside of the hatch to serve as guides. I also added a piece to the front of the hatch to help keep it from moving forward..."

Supplementary file notes



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Sorceress (oz9173) by Merrill F 1993 - model pic

  • (oz9173)
    by Merrill F
    from MM Glider Tech (ref:MM-002)
    50in span
    Glider R/C Kit
    clean :)
    formers unchecked
  • Submitted: 05/09/2017
    Filesize: 403KB
    Format: • PDFbitmap
    Credit*: EricM
    Downloads: 1525

Sorceress (oz9173) by Merrill F 1993 - pic 003.jpg

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