Sunbird (oz7221)

 

Sunbird (oz7221) by Mike Hollison from RCMplans 1995 - plan thumbnail

About this Plan

Sunbird. Radio control flying wing sailplane model.

Quote: "Can't decide on your next sailplane project? Why not give this quick building, great thermalling 2m flying wing a shot. SunBird by Mike Hollison.

Sunbird is a 2 meter flying wing, designed expressly for thermal soaring. It uses a reflex airfoil for pitch stability and clevons for precise lateral control. Anyone who has built at least one aileron controlled sailplane should have no difficulty with this model.

Construction. Wing:

1. Lay the 1/4 in sq spruce leading edge and the 1/8 x 1/4 spruce bottom main spar over the plan, and epoxy ribs W2 and W7 in place.
2. Cut the trailing edge from 1/4 x 1 in tapered stock balsa, slot for the wing ribs and epoxy to W2 and W7, propping the TE up with 1/4 in scrap to provide the necessary reflex angle.
3. Glue ribs W3 to W6 in position.
4. Next, cut the elevon support spar from 1/4 in balsa, slot for ribs W8 through W11, lay over the plan and epoxy to rib W7. Epoxy rib W11 in position.
5. Cement ribs W8 to W10 in place, and add the top wing spar.
6. Glue a piece of 1/4 in balsa between W2 and W3 and the two wing spars Add the 1/16 sheet balsa webbing between ribs W2 through W8 on each side of the spars, forming a box.
7. Cement sheet webbing between W8, W9, and W10 to the rear of the spars only. There is no webbing between ribs W10 and W11..."

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Supplementary file notes

Article pages, text and pics.

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Sunbird (oz7221) by Mike Hollison from RCMplans 1995 - model pic

Datafile:
  • (oz7221)
    Sunbird
    by Mike Hollison
    from RCMplans (ref:1193)
    June 1995 
    78in span
    Glider R/C
    all formers complete :)
    got article :)
  • Submitted: 15/11/2015
    Filesize: 677KB
    Format: • PDFbitmap
    Credit*: KraftyOne

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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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