Nebula (oz8722)


Nebula (oz8722) by Dick Sarpolus, Arni Pedersen 1974 - plan thumbnail

About this Plan

Nebula. Radio control sailplane model. Wingspan 109in, area 926 sq in.

Quote: "This sailplane is the result of a real team effort by two friends. Many, many hours were spent discussing, arguing, sketching, cutting and building. The labor expended in those hours was amply repaid when the Nebula was launched into its first flight and it looked like we had a winner. When the fifth flight lasted over ten min, from a hi-start launch, we were sure that the total effort had been worthwhile. Here, we explain the design theory behind the Nebula's configuration and construction.

Our most important goal was, of course, good contest performance. Also desired was a realistic, modern appearance and an easy, quick construction method. To achieve good performance, we had to have a conservative, conventional design approach. We're not trying for a radical breakthrough - just a good (hopefully optimum) combination of proven design features.

Based on our experience with other designs plus observations at contests, we settled on certain features - the airfoil would be an Eppler 387 with a flat bottom. Every design must be a compromise for weather conditions and other variables, and we felt the airfoil chosen is the best all-around performer for wind penetration and still air floating. To keep floating ability, we want plenty of wing area - the Nebula has 930 sq in. We are convinced that, for our model sizes, a low aspect ratio is better, so our wing here has an aspect ratio of 13 to 1 that's low compared to many current designs... "

Nebula, American Aircraft Modeler, February 1974.

Direct submission to Outerzone.

Supplementary file notes

Article pages, thanks to RFJ.


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

Nebula (oz8722) by Dick Sarpolus, Arni Pedersen 1974 - model pic


Nebula (oz8722) by Dick Sarpolus, Arni Pedersen 1974 - pic 003.jpg
Nebula (oz8722) by Dick Sarpolus, Arni Pedersen 1974 - pic 004.jpg
Nebula (oz8722) by Dick Sarpolus, Arni Pedersen 1974 - pic 005.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.