[rcsoaringdigest] The New RC Soaring Digest | May, 2023 | Vol. 38, No. 5

This month's cover comes to us by way of Jonathan Demery, who caught the exact right moment when these four young RC soaring enthusiasts let loose their glider over the bluffs on the Great Orme, Wales.

May, 2023 Volume 38, No. 5

We have another great batch of articles for you this month—we encourage you to click any of the stories below to go straight to that article and start reading...

The Launch Zone

In The Air Open cockpit flying just four feet off the ground. Terence C. Gannon May 05 · 8 min read "I finally managed to extricate myself from my post-pandemic funk - or at least start down that road. One of my great joys in life - cycling - remained on the to-do list for all of 2022. I didn't cycle a single centimetre the entire year. But I was determined to get back in the saddle in 2023..." Letters to the Editor The coming regulatory storm knows no borders? The New RC Soaring Digest Staff May 04 · 5 min read "The In The Air piece in the April 2023 issue along with Adam Weston's It's Time to Raise the 250g Limit stirred up a lot of commentary. We were fairly sure would be the case. Here's a representative sample of what we received..." Silent Arrow® Successfully Tested by US Special Forces Recently declassified material reports test program conducted at United States Army Yuma Proving Ground in Arizona. The New RC Soaring Digest Staff May 03 · 2 min read "The US Army's 1st Special Forces Group (Airborne) successfully tested the Silent Arrow® GD-2000 autonomous delivery glider in February of this year according to recently declassified material released by the US Department of Defense. A Special Forces detachment commander, whose team tested the glider, said that..." Cool New Stuff Three great gliders, a gadget to carry them in and a mug to toast bringing 'em back in one piece. The New RC Soaring Digest Staff May 01 · 8 min read "Our monthly new product showcase has rapidly become one of our most popular features. This months offering come from all over the RC soaring world: Poland, Canada, the United States and France...." Featured on the May 2023 Cover Photo T-Shirt is this remarkable photo by Jonathan Demery, who caught the exact right moment when these four young RC soaring enthusiasts let loose their glider over the bluffs at the Great Orme, Wales. Order yours today from the RCSD Shop.   Sponsored

Features

Project ALTius Part IV: An extended essay to help see the big picture. Tiberiu Atudorei Apr 30 · 21 min read "Project ALTius is a long story of disappointments, failures, dead ends and above all resilience and hope. As any good drama this saga has its fair share of surprises and unexpected turns of events. Here are a few of them..." Twist Distributions for Swept Wings Part 4: The effect of lift distribution and aileron configurations on adverse and proverse yaw, and using bell-shaped lift distribution to reduce induced drag. Bill Kuhlman Apr 30 · 11 min read "In Part 1, the elliptical lift distribution was defined by means of a geometric construction. Figure 1 illustrates this methodology. Simply stated, vertical lines are dropped from a semicircle to the baseline. The center of these verticals are then determined and a curve drawn which connects the determined points. The curve thus defined is an ellipse..." Calculating Laminate Thickness Figure it out before you start unrolling carbon cloth and mixing resin. Rachael Geerts May 03 · 7 min read "Have you ever wondered how laminate thickness can be determined without breaking out the epoxy and reinforcement fabric? The answer is simple - use math. While some of you may have just lost interest because you think math is too difficult, I can assure you that this math requires nothing more than some basic multiplication, addition, and division. Let's get to it..." F3F—in Black and White How I planned a photo essay on Instagram. Michael Shellim May 03 · 4 min read "Ever since I started competing in F3F, I've always carried a camera — it just feels a natural thing to do, thanks to the beautiful slopes that we're blessed with in the UK. Since those early days, I've attended more than 150 F3F events..." Here's a great way to cheekily comment on all the regulations coming down the pipe which will undoubtedly impact this thing we love to do. The slogan worked for skateboarding, so why not RC soaring, right? Check them out in the RCSD Shop.   Sponsored

Ongoing Series

Condor Corner Glider flight simulation–for safety's sake. Scott Manley May 03 · 6 min read "Each year the Soaring Safety Foundation (see Resources below for link) publishes a Safety Report citing both fatal and non-fatal glider-related accidents and comparing the year's accident rates with longer term trends. To focus attention on the issues bringing our sport and its participants to..." Soaring the Sky Podcast E064: Soaring In Paradise With Aerobatics Gliding Team Member James Alaggio Chuck Fulton May 04 · 2 min read "On this episode James Alaggio talks with us about his adventures soaring in a place where you can get a 1000 foot tow and stay in the air for hours. James has been flying gliders since he was 13 and since then he has flown all over the world..." Center Between Two Holes Here I am stuck in the middle with you. Tom Broeski May 04 · 2 min read "On more than one occasion, I've watched someone trying to measure the center between two holes by eyeballing the empty space and guessing the exact center. The other day this happened again and he was a millimeter off when we measured it. So..." The New RCSD Logo Peaked Cap comes in eleven colors to match your inimitable personal style. Thanks to the adjustable strap it is one-size-fits-all for both men and women. It features the New RCSD logo on the front and on the back you'll find the classic RC Soaring Digest sailplane motif which first appeared on the very first issue from January of 1984. Check them out in the RCSD Shop.   Sponsored

Retrospectives

Manfred Derschug A retrospective on the designer and his legendary Brillant V. Jan Sime Apr 28 · 7 min read "In 1972 the Brillant V RC glider was introduced and soon became a legend. It was sold for over 30 years. The latest version I could find is from 2020. With a wingspan of 2760mm and a weight of 1300g, it was one of the lightest gliders in its class. Combined with the E385 modified airfoil profile it was used by many glider pilots and entered in many competitions in neighbouring countries..." The History of Electric Flight Part I: Pioneers Colonel H. J. Taplin and Fred Militky Mike Goulette Apr 29 · 11 min read "Apart from a few unsubstantiated reports of electric powered free flight models from the early 20th century and some control line experiments with power fed down the lines, the first documented electric model aircraft flight was with an RC model on June 30th 1957..." Glider Patents US 2019/0318296 A1: System and Method for Performing Precision Guided Air to Ground Package Delivery The New RC Soaring Digest Staff May 03 · 21 min read "Unpowered gliders may also be used to deliver cargo airdropped from airplanes. Similar to parafoils, gliders employ aerodynamic lift in order to reduce vertical descent rate and control surfaces to increase precision of landing. However, gliders require a large wingspan in order to maintain a suitable glide ratio generally greater than 10:1..." Stamps That Tell a Story Philatelic Finland. Simine Short May 04 · 4 min read "The Finnish Department of Posts issued a postage stamp showing a yellow high performance sailplane over the lake regions in conjunction with the upcoming World Championships. This sailplane was the PIK-20 prototype. First Day Covers were postmarked both in Finland's capital Helsinki and in Lahti..."

That's a Wrap!

The Trailing Edge So when do new issues come out, anyway? The New RC Soaring Digest Staff May 05 · 3 min read "Okay, okay we know — the May issue didn't hit the streets until the 5th of the month. In addition, readers will likely have noticed that as each month goes by, another day it tacked onto the schedule. Trust us, it's not intentional. It's simply a bi-product of the ever-increasing workload associated with getting new issues out the door..."

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