Viki (oz10831)


Viki (oz10831) from Obag 1990 - plan thumbnail

About this Plan

Viki. Radio control hand launch glider. Wingspan 1400mm, wing area 21,7 sq dm. For 2 channels.

Quote: "VIKI is R/C glider designed for hand launching. The take-off is possible even by means of rubber catapult or with regular towing line. The passive towing by other R/C engine powered model is possible as well and VIKI as towed model need not to be steered during the towing (therefor 'passive' towing). For such towing even small model with an engine of about 2,5 ccm is enough.

To reach flying characteristics of VIKI the weight of the model has to be observed mainly in the tail part of the model. Small receiver and mini servos have to be used and receiver NiCd battery has to be with low capacity of about 250 - 270 mAh. The bowdens for elevator and for rudder have to be of small diameter (tube about 3,2 / 1,8 mm, core wire about 0,8 mm). When not stated other way, CA fast glue is recommended for the construc-tion of the model and as covering material light type of iron-on plastic foil is recommended.

ASSEMBLING PROCEDURE (Not assigned measures are to be understood in mm)

FUSELAGE: On the fuselage sides the position of formers and servos have to be marked. (Servo on right sidewall has to be placed 5 mm higher and more close to the nose than the servo on left sidewall - on the drawing the servos Modelcraft S7-2 are shown). Around the servos the frame 4 from balsa 4x5 has to be glued on. (This part of left sidewall see on the drawing top right).

Glue on the reinforcing 2.2a from balsa 2x5 and the triangle crossection spar reinforcing glued on such a way so that/the-space for covering sheeting 2,5 mm will be prepared.

The corners of pre-cut formers 7, 8, 9 and 11 have to be cut off and the holes for tubings are to be made. The upper side of formers 7, 8 and 9 has to be shaped as shown on the drawing.

Glue on the wooden fuselage head on the left sidewall as well as the formers 6 through 9 and 11.

Right sidewall has to be glued on the formers 6, 7 and 8. Check if the sidewalls are parallel and not shif-ted one against the other.

Left sidewall has to be supported from the bottom by supports X (positioning and thickness of supports are to be as shown on the drawing) and same supports have to be placed even on the right sidewall. Apply glue on the surface of the fuselage head and on the edges of the formers, put it together and keep it under some load from above using some piece of wood or other heavy subject.

From triangle spar 4,5x20x100 cut off the parts 15 having the length 32 and 30 mm, drill in the holes of 7 mm dia for plastic nuts 16 and glue them in. Glue on the parts 15a made from the piece of plywood.

Covering sheeting 14 adjust such a way so that it would match to the corresponding place of the fuselage. As it z is given by drawing mark on and drill two holes 7mm dia for nuts 16 and in the tail area the holes for spars of / the vertical tail surface (30 and 31) and a hole 4 mm dia for the screw. In the front part the sheeting has to be slightly cut to fit on the upper sides of the fuselage formers..."

Direct submission to Outerzone.

Update 12/02/2020: Added kit review (of the Viki 2 kit) from Silent Flight, thanks to RFJ. Note the Viki 2 kit included a glass fibre fuselage, as opposed to the earlier built-up balsa fuselage.

Supplementary file notes

Instructions, complete, 8 pages.
Kit review.


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Viki (oz10831) from Obag 1990 - model pic

  • (oz10831)
    from Obag
    56in span
    Glider R/C
    all formers complete :)
  • Submitted: 20/01/2019
    Filesize: 525KB
    Format: • PDFbitmap
    Credit*: KaoruKiyose

Viki (oz10831) from Obag 1990 - pic 003.jpg
Viki (oz10831) from Obag 1990 - pic 004.jpg
Viki (oz10831) from Obag 1990 - pic 005.jpg
Viki (oz10831) from Obag 1990 - pic 006.jpg
Viki (oz10831) from Obag 1990 - pic 007.jpg

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User comments

Hi, I found a picture of Viki, oz10831 [more pics 006, 007]. Cheerio.
Uwe - 28/01/2019
Please have a good look at the plan thumbnail and photo together, the construction of both models is very different, study the wing tip structure and tailplane shape. Models have the same name but not sure if it's the same model.
Derick - 22/07/2019
Ah, ok, yes you're right, those earlier 2 pics do not show the same Viki model. Ok, I have shuffled those 2 pics down to 006,007 (for reference) and used pics from the review, thanks to RFJ, at the top of the page.
SteveWMD - 12/02/2020
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