Fournier RF-4D (oz6569)

 

Fournier RF-4D (oz6569) by FH Leisten from Wik Modelle - plan thumbnail

About this Plan

Fournier RF-4D. Semi-scale motorglider model for radio control. For motor: 2.5 - 5.00 cc (0.15 - 0.29 cu. in), wing span: 2200 mm (87"), length: 1220 mm (48").

Direct submission to Outerzone.

Update 08/09/2021: Added instructions and materials list, thanks to Dries.

Quote (from the German, thro OCR then Google translate):

"BUILDING INSTRUCTIONS FOR THE RC MOTOR GLIDER FOURNIER RF-4

The present RC motor glider model RF4 belongs to the category of prototype-like or more elegantly 'semi-scale' models. It is intended for advanced RC model pilots who want to create a structurally relatively simple model despite prototypical ambitions and, in addition to the lifelike flight image, also want to control a sporty, fast-flying model, whereby one does not have to do without a whole series of aerobatic maneuvers.

To complete the construction plan, I would like to Write the following building instructions: The somewhat experienced model pilot will be able to use the plan to largely approach the construction of the model, and the building instructions should be viewed more as an aid.

The numbering of the individual parts was made so that you can work according to the sequence of numbers. Let's start with the trunk. First, positions 1 and 2 are glued to a flat surface. Make sure that the plywood parts get into the interior of the fuselage later; so build a right side and a left side! Furthermore, the fuselage frames 4, 5, 6 and the stern strip 7 are prepared and glued according to the plan from the corresponding balsa strips. After the middle board of the fuselage has also been cut, item 3, the lower part of the fuselage is glued backwards on the building board from items 1 to 7.

In order to be able to continue working without difficulty later, the opened fuselage box should protrude about 15 mm on the fuselage slipway or the building board at the front. While it is being ventilated, we can now prepare the engine bulkhead 9 and then glue it in at the front. Now the triangular corner strips 8 are precisely cut to length and glued in place. Now adjust positions 10, 11 and 12 in sequence and glue them together. For item 11 it should be noted that the corresponding bores are available here for the later assembly of the chassis before gluing!

While the lower fuselage box is drying, according to the plan, the rudder unit is put together from the provided strip material pos. 13 to 16. Only when the glued rudder unit is completely dry is profiling according to the plan view using a balsa plane and sanding block. The same applies to the horizontal stabilizer, which is composed of items 17 to 20. The two-part elevator 22 is then profiled from two balsa slabs, and all of the tail unit parts are then put together with the rudder hinges (item 59) and the elevator flap connection item 23.

The lower part of the fuselage is now dry and can be removed from the building board. Now all parts of the upper part of the fuselage can be optimally adapted and glued, with parts 24 to 39 being neatly adapted and glued following the numbering. With items 37, 38 and 39, make sure that these are glued about 0.5 mm into the interior of the fuselage, in order to obtain a clean transition to the side walls of the fuselage etc. when the canopy is opened, item 53! Now the landing gear pos. 40 at pos. 11 screwed and then we can close the fuselage floor at the front using pos. 41. Furthermore, the prepared and well-adapted fuselage-wing transitions pos. 42 and 43 are then glued on both sides of the fuselage as an additional wing support and then profiled after drying.

After you have cut the plywood holder for the throttle leg, item 44 according to the underside of the fuselage at the back and pre-bent the spur from the provided steel wire 2mm 0, item 45, both parts are sewn together using small holes and 0.5mm 0 nylon cord and with synthetic resin adhesive secured. Then the fuselage is cut out at the bottom at the relevant point except for the triangular strips on the inside..."

Supplementary file notes

Instructions, in German (includes materials list and appended correction page). 7 pages in total.
Instructions (brief), in French. 2 pages.

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Fournier RF-4D (oz6569) by FH Leisten from Wik Modelle - model pic

Datafile:
  • (oz6569)
    Fournier RF-4D
    by FH Leisten
    from Wik Modelle
    87in span
    Scale IC Glider R/C LowWing Kit
    all formers complete :)
  • Submitted: 18/04/2015
    Filesize: 830KB
    Format: • PDFbitmap
    Credit*: Pasquale, Dries

ScaleType:
  • Fournier_RF-4 | help
    see Wikipedia | search Outerzone


    ScaleType: This (oz6569) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.

    If we got this right, you now have a couple of direct links (above) to 1. see the Wikipedia page, and 2. search Oz for more plans of this type. If we didn't, then see below.


    Notes:
    ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/Fournier_RF-4
    Wikipedia page addresses may well change over time.
    For more obscure types, there currently will be no Wiki page found. We tag these cases as ScaleType = NotFound. These will change over time.
    Corrections? Use the correction form to tell us the new/better ScaleType link we should be using. Thanks.

Fournier RF-4D (oz6569) by FH Leisten from Wik Modelle - pic 003.jpg
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Download File(s):
  • Fournier RF-4D (oz6569)
  • Plan File Filesize: 830KB Filename: Fournier_RF-4D_oz6569.pdf
  • Supplement Filesize: 3874KB Filename: Fournier_RF-4D_oz6569_instructions_de.pdf
  • Supplement Filesize: 1381KB Filename: Fournier_RF-4D_oz6569_instructions_fr.pdf
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Notes

* Credit field

The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.

Scaling

This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.

 

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