Sparrow MK1 (oz14945)


Sparrow MK1 (oz14945) by Marc Avondet 1999 - plan thumbnail

About this Plan

Sparrow Mk1. Radio control glider model. Wingspan 1400 mm. Balsa construction with a foam-core wing.

Update 24/11/2023: Added article, thanks to George.

Quote (google-translated from the German): "A sparrow for aerobatics. By Marc Avondet.

The Sparrow (Sperling) is a small acro-suitable slope soarer of mixed construction: the fuselage and tail units are made of wood, the wing is made of a planked polystyrene core.

The objective when designing this model was to achieve a robust design and excellent flight characteristics with minimal construction effort. The robust design requires, in addition to an appropriate construction, a low mass of less than 1 kg. This can be achieved relatively easily given the small span. I'm lucky enough to live right next to the Swiss Alps, so a small mass and wingspan are a good prerequisite for regular excursions to higher mountain regions. Fortunately, many good slope airfields in the Alps are still not accessible by car or cable car, but instead involve a longer walk at the beginning and end of the fun, which can be managed much more easily with 'light' luggage .

The only disadvantage of a small glider is the poor visibility at long distances, but the Sparrow is better suited for actions on the edge of a slope anyway, so that problem doesn't really arise.

Although very simple to set up, this glider is only intended for experienced pilots. The control takes place via two axes (across and elevation), the maneuverability is very good at higher flight speeds. Thanks to the relatively low wing loading, the slow flight behavior is extremely good-natured. Aerobatics are somewhat limited by the lack of rudder control, but with the pronounced differentiation of the ailerons, tight circling in thermals is also possible without any problems. The speed range is large, from stealthy flight in thermal tubes to vertical dives at top speed, everything is possible.

Fuselage construction: The hull consists of a simple box construction. The construction begins with cutting the two side walls (1) from 2 mm balsa. The 4x4 mm balsa LE strips (3) are glued to the side walls as corner reinforcements. The reinforcement parts (2) made of 1 mm plywood are then glued to the inside of the side walls. The contour of the reinforcement parts is partially marked on the plan with arrows.

After drying, the holes (3 or 4 mm) for the tenons of the frames are drilled on the inside. The holes are coated on the outside with a little thin liquid..."

Supplementary file notes



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

Sparrow MK1 (oz14945) by Marc Avondet 1999 - model pic


Sparrow MK1 (oz14945) by Marc Avondet 1999 - pic 003.jpg
Sparrow MK1 (oz14945) by Marc Avondet 1999 - pic 004.jpg

Do you have a photo you'd like to submit for this page? Then email

User comments

No comments yet for this plan. Got something to say about this one?
Add a comment



Download File(s):


* 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.


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, 2011-2024.

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.