Slingsby Eagle 3

 

Slingsby Eagle 3 - plan thumbnail image

Slingsby Eagle 3 - completed model photo more pics (5)

Slingsby Eagle 3  
by Keith Humber
from Radio Modeller
September 1991 
66in span
Tags: Scale Glider R/C Civil
all formers complete :)
got article :)


This plan was found online 30/06/2012 at: http://www.hippocketaeronautics.com/hpa_plans/categories.php?cat_id=41
Outerzone planID: oz164 | Filesize: 565KB | Format: • PDFbitmap | Credit*: mikewight

   

About this Plan

Slingsby Eagle 3 - Scale glider for radio control.

Quote: "This mini scale Slingsby Eagle came into being as a result of chatting to your editor on the phone. He was asking for models that would fit RM roll out plans, but was looking for something a little different to the usual run. So it gave me an excuse to try an idea that had been in my mind for some time - a mini scale series of Slingsbys. They must be easier to transport, cheaper and quicker to build than the 1/4 scale variety.

If the flying was still reasonable then it would be super, so out with the drawing board and arrive at a suitable size to fit the paper. Around 66in span seemed about right which must make this Eagle about 1/8 scale or thereabouts. I was lucky in having one of Slingsby's own rigging drawings so the model outline is pretty true to scale and so are the tail areas and control surfaces. The construction is, however, not scale since I reasoned at this size it wasn't worth making such a fiddly constructional exercise.

The wing section is a Gottingen 398 which is in keeping with the full-size Gottingen 535 - I think! I designed the model to accept the average radio pack, but I must confess it would be easier to use a mini servo on the ailerons. I used Futaba Challenger and 148 servos on my model and the flying weight is around 24 ounces all up. The model is finished in a colour scheme supplied by John Watkins who built a 1/4 scale Eagle a few years ago and says it was the best model he ever had.

The flying is superb and not in the least jumpy. It will slow down to a scale speed or go like a bat out of hell if needed. It loops, rolls, stall turns and spins -which I bet the full-size couldn't manage - but will also fly around in a most sedate and stable manner, if you are looking for scale effect. At height you can't tell whether it is a mini scale or a 1/4 scale at a higher ceiling. She is happier in a force four but will scratch in much lighter winds. So, all in all, the Eagle has proved to be very successful..."

Update 23/05/2016: article pages, text & pics added, thanks to RFJ.

Supplementary files

Article pages, text & pics.

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User comments

Hi, I built the Slingsby Eagle, actually two of them. I made a few changes and also have a build log on www.rcgroups.com/forums/member as guamflyer. I have a bunch of pics of the plane [more pics 003-007] and lots of video flying it.
guamflyer - 09/05/2017
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Notes

* Credit field

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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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