Ramphor (oz13465)

 

Ramphor (oz13465) by Heinz Eder from FMT 1993 - plan thumbnail

About this Plan

Ramphor. Radio control slope glider model. Wingspan 1950mm.

Direct submission to Outerzone.

Update 29/11/2021: Added article, thanks to BerndLangner.

Quote (through Google translate, from the German): "MT-1071: Thermal flying wing 'Ramphor', by Heinz Eder.

Conception: The 'Ramphor' was supposed to prove that a flying wing does not always 'only' have to fly fast and does not always have to look ugly. As is well known, it can be argued about taste that many of the modern 'wings' resemble a flying clothes hanger, but it is a fact. The 'Ramphor' offers the aesthetics of natural archetypes, which represents a certain contrast to the 'Ceozwos' with descendants.

The wing shapes that occur in nature are rarely straight, angular, they are more like a parabola or sickle! The additional construction work is not essential and is more than compensated for by an impressive and rustic flight image.

Now this shape, which emerged from the course of evolution, of course also has its aerodynamic advantages: The center effect is reduced and the lift distribution is therefore more favorable. But how do you get a slowly flying device stable? No compromises should be made here, because the slightest approach of instability, be it about the longitudinal, transverse or vertical axis, is known to cost flight performance.

To fly slowly, you have to be stingy with the weight (target about 700 g) and use a relatively strongly arched profile at the root, the cm0 of which is still within limits (own design). The motto: 'A lot of curvature at the root results in a whisker on the outside' then became a bitter truth during the flight tests, because it turned out that 'Ramphor' at the most favorable center of gravity is about 4 degrees inclined ailerons (that is, a S-impact profile outside) required..."

Supplementary file notes

Article, in German.

Corrections?

Did we get something wrong with these details about this plan (especially the datafile)? That happens sometimes. You can help us fix it.
Add a correction

Ramphor (oz13465) by Heinz Eder from FMT 1993 - model pic

Datafile:
  • (oz13465)
    Ramphor
    by Heinz Eder
    from FMT (ref:0)
    July 1993 
    Glider R/C
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 19/11/2021
    Filesize: 298KB
    Format: • PDFbitmap
    Credit*: KaoruKiyose

Ramphor (oz13465) by Heinz Eder from FMT 1993 - pic 003.jpg
003.jpg

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

Are those reverse dihedral wingtips an aerodynamical necessity? That elliptical wing planform is pretty enough, it's a pity to spoil it with those tip cranks :-)
Miguel - 01/12/2021
Thanks for submitting this plan, what a magic looking model!! ......another one that will need to go on my 'to do' list!!! :)
Cheers,
Mark Stanley - 03/12/2021
Add a comment

 

 
 

Download File(s):
 

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.

 

Terms of Use

© Outerzone, 2011-2022.

All content is free to download for personal use.

For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.

Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.