Satyr (oz4564)


Satyr (oz4564) by J Van Hattum 1951 - plan thumbnail

About this Plan

Satyr. Towline glider. Note this plan is at 50% of fullsize, but shows the ribs and formers at 100%.

Quote: "Satyr was designed as a small sailplane model, simple enough to be used as 'the beginners first contest model' yet capable of a useful performance. The small tailplane on a long lever-arm gives excellent stability and the sturdy construction makes the fuselage capable of standing up to any rough treatment - except a careless foot! Of the four prototypes built, three came out below the minimum FAI weight of 11-1/4 oz - the heavy one being the designer's! - so do not spare cement and reinforcement where it serves a good purpose.

Fuselage. First cut plan shape from 1/16 in sheet, glue longerons along the edges and fit bulkheads and top longerons. Next mount the vertical sides from former 1 to 6. Finally put on the decking, but don't forget to fix the hardwood dowels while the fuselage is still open. Decking can be left well oversize and trimmed after cement has set. Use plenty of pins to keep sheet in place where it has to be forced into a bend.

The nose block is made of three layers of hardwood, total width about 1.2 in; the centre one being hollowed out to take trimming ballast. Nose block is glued straight on to former 1. Fit fin when model is nearly complete so that you can check for true alignment and rigging relative to wing.

Wing. This is quite a simple constant-chord structure and all ribs are 1/16 in balsa: Build it in three sections which are later joined by the dihedral braces. I found joining very easy when I glued one brace to the spar on the outer section and the other on the inner section it gives more support when joining up the sections and less danger of finding insufficient dihedral after cement has set.

The constructional method used in building the wing has been described in the May 1950 issue of Model Aircraft. Briefly, it consists in first cementing main spar and leading edge to the nose sheeting; taking good care that the distance between the two is just right to cover the nose portion of the ribs. When the spars are well in place cement the ribs to the main-spar and a short length of the sheeting. When set, pull the sheeting over the ribs and cement with plenty of pins to keep the parts in position. Take care to line up the tails of the ribs..."

Update 19/08/2018: added article, thanks to RFJ.

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

Satyr (oz4564) by J Van Hattum 1951 - model pic


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.