RC Soaring Digest

Now in its thirty-fifth year of publication

bsquared AT rcsoaringdigest DOT com

Pierre Ruat's ASH 30 Mi

August 2018 issue

FRONT COVER: Pierre Ruat's large scale ASH 30 Mi glides overhead. More photos of this model starting on page 85 of this edition.
Nikon D7100, ISO 100, 1/1000 sec., f4.0, 200 mm

FB logo
is now on FaceBook!
Click the logo to go there.

If you'd like to support RC Soaring Digest, please consider making a donation.

The August 2018 issue highlights are available here.

You can download the entire August issue of RC Soaring Digest (106 pages) by following one of these links: 

We highly recommend RCSD PDF files be downloaded to your computer hard drive where they can be opened with Acrobat Reader 5 or higher. Viewing the PDF within a web browser via a plug-in is not reliable.

You can be automatically notified when the next issue of RCSD is posted by becoming a member of the RCSoaringDigest group on GROUPS.IO.

Guidelines for submitting materials for publication in RCSD can be found in this PDF document (43K).


PDF versions of all RCSD back issues can be downloaded from the RCSD archives.

These PDF documents require Adobe Acrobat Reader 5 or higher for viewing. If you do not have Adobe Acrobat Reader, you'll need to download this free software from the Adobe web site.

Adobe Acrobat Reader

If you have questions concerning downloading and viewing PDF documents, we encourage you to look at this page.

RC Soaring Digest is published as PDF documents and is available for downloading on or about the 20th of the month.

Martin Simons'
Thermal Soaring

Walter Jaburek of Vienna Austria has scanned the complete Understanding Thermal Soaring Sailplanes series written by Martin Simons and created a single PDF which includes all of the articles. This series of articles appeared in RCSD starting in January 1990 and ending in the November 1991 issue. There are direct references to F3J, which had just been made an official event but the topics covered are easily related to all forms of RC soaring. Topics include the sailplane polar, weight and ballast, turning,drag, scale effects, performance calculation, moment arms and tail volumes, and horizontal stabilizer considerations, along with numerous others. Well worth the 5.6MB download.

RC Soaring Digest / B2Streamlines is pleased to be able to make available the DIAMANT Archive containing materials belonging to Art T. Babiarz, Jr., owner and caretaker of Flug- und- Fahrzeugwerke AG DIAMANT 16.5, serial number 012, N1193, XX. This vast amount of material is more than likely the largest collection of DIAMANT information in existence.


PDF versions of Slope Soaring News, published February 1988 through February/February 1990 by Charlie Morey. All twenty issues are now available for downloading.

INDEX thru 2005A complete index for all issues of RCSD through 2005. The search engine is now configured so the results have links to the respective PDF files.

 * Brian Agnew, holder of 15 national titles, shares his expertise regarding trimming an R/C sailplane. (HTML)

 * Dr. Michael Selig wrote two important articles for RCSD some time ago and he has given us permission to post both articles on this website -"Flies Faster" and "The Square-Cube Law and Scaling for RC Sailplanes."(HTML)

 * "Scaling Sailplanes," a chapter from the book "Sailplanes!" by Dr. Ferdinando Gale and Aldo Calza, is now available as a PDF document (2.2 MB). Written by Dr. Gale, this 53 page treatise explores the physics behind obtaining "scale" performance from a miniature glider. Includes aerodynamic principles and construction materials.

B2Streamlines.comRC Soaring Digest is published by B2Streamlines.com

Made on a Mac