Uniliner (oz13911)

 

Uniliner (oz13911) by Aubrey Kochman 1951 - plan thumbnail

About this Plan

Uniliner. Control line sport model.

Quote: "Only one line between the man and model? That’s right, this sport racing stunter uses Stanzel’s Mono Line. Uniliner, by Aubrey Kochman.

High up on the list of pioneers in aeromodeling is Victor Stanzel and his associates of Schulenburg, Texas, whose new Mono Line control system is the first major change from the usual bell crank system in that it completely eliminates the bell crank, uses a single line, features a positive acting return to neutral and complete control regardless of line slack. This last feature makes possible controllable flights especially with small light models regardless of wind conditions. Even if the model is blown in toward the center of the circle with the lines going slack, it remains under control and responds to any control handle movement.

A beginner who has never flown control-line before should have little difficulty in getting the hang of Mono Line flying. However, those with more experience will find it as completely different as would a conventional airplane pilot when stepping into a helicopter for the first time. You just have to learn to do things differently to accomplish the same results. Up-is-up and down-is-down does not apply to Mono Line flying for control is transmitted to the model by a sliding knob. Forward is down and back is up. Sliding the knob to neutral or releasing it completely returns the control surfaces to neutral.

Not wanting to go off the deep end in designing our first Mono Line model, we used the Mono Line Tuffy kit which introduced this new control system as a basis for our Uniliner. The model as presented here is simplicity itself, requires very little building time and yet is rugged enough to really take it.

Start by building wings and tail surfaces. Wing is cut from medium soft 3/16 sheet. Cut to outline shape, sand to proper airfoil. Cut in half, bevel edges, cement together at proper dihedral angle. Add a 1/2 ounce weight to outside tip. Tail surfaces are cut from quarter grained balsa. Elevator hinge is single strip of cloth cemented to top side only.

Fuselage is built as follows: Cut all formers, drill all necessary holes. Cut out side sheets from 3/32 quarter grained balsa, install formers and bot tom sheeting (see Basic Fuselage Construction detail). Add 1/16 sheet behind former #4. Install Mono Line control unit, cementing shortened dowel to balsa block. Cement stabilizer, with control horn installed, in place and hook up pushrod. Follow instructions supplied with Stanzel's control unit.

Bend landing gear to shape, cloth bind and cement to 3/32 plywood. Cement this unit to inside of bottom sheeting and against plywood firewall. 1-1/4 inch Banner wheels were used because of their neat appearance. Cement wing in place. Install fuel tank, cut wing center section to allow snug installation. Turtle deck between formers #3 and #4 is pre-bent of 1/16 soft straight grained sheet balsa. Pre-bending sheet balsa (really quite simple) is accomplished by applying cement to one side of sheet and wetting other side. Cement fin in place. Note that it butts against former #4 and the previously installed 1/16 sheet.

Add soft balsa blocks to either side of fin carve to shape conforming to turtle deck. Cement rudder to fin, off-setting at least 1/2 in to outside of circle. Former #2 is cemented on wing. Add 1/16 sheet between former #1 and #2, pre-bending as you did with turtle deck. Install engine, using either 2-56 machine screws or small wood screws. Add engine cowl sides, bottom piece, and sub rudder. Control line guide is cut from 1/16 plywood install by cutting 1/16 deep groove into wing, cementing guide into groove. Apply glue liberally.

Cover entire model with tissue as it adds greatly to strength and rigidity of completed model. Choose a tissue close in color to that which you intend painting in this way you need only apply two coats of colored dope to cover well. Add Scientific pilot head, bubble canopy, Trim Film decorations, then apply coat of fuel proofer.

If you class yourself as a beginner, balance model close to leading edge of wing (this prevents model from climbing too rapidly when it comes around into wind). For the more experienced flyer who intends looping, balance model from 1/2 to 3/4 in behind leading edge.

Do your initial testing on a calm day in order to get the feel of this new control system. Remember that although the Mono-Line control system eliminates loss of control, it does not eliminate 'pilot error.' That’s strictly up to you."

Direct submission to Outerzone.

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Uniliner (oz13911) by Aubrey Kochman 1951 - model pic

Datafile:
  • (oz13911)
    Uniliner
    by Aubrey Kochman
    from Air Trails
    February 1951 
    24in span
    IC C/L
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 10/05/2022
    Filesize: 327KB
    Format: • PDFbitmap
    Credit*: dfritzke

Uniliner (oz13911) by Aubrey Kochman 1951 - pic 003.jpg
003.jpg

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