[rcsoaringdigest] The New RC Soaring Digest | March, 2023 | Vol. 38, No. 3

From Mike Shellim's excellent Instagram feed, this beautiful image features Kevin Newton giving Alvaro Silgado's Fox some prime motivation off the south face of La Muela, Spain in 2019.

March, 2023 Volume 38, No. 3

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 Spring forward. Terence C. Gannon Mar 02 · 6 min read "For the record, I'm firmly in favour of retaining [Daylight Saving Time] as-is. But for a very selfish and some would say silly and sentimental reason. And certainly one that makes absolutely no sense whatsoever outside my sample size of exactly one. Me. I like the annual rite of Spring because it reminds me of my dad..." Letters to the Editor Mark Drela, more flight simulators, another helpful answer and simply a kind word. The New RC Soaring Digest Staff Mar 02 · 4 min read "John Vigour reminds of what else Mark Drela has accomplished (it's a lot!), Mike Goulette answers Sanjay's Graupner Mosquito question, Bill Tsang wants more simulator coverage and Lyle Jeakins simply offers a kind word—which we really appreciate..." Cool New Stuff A little (or not so little) something for every interest and budget. The New RC Soaring Digest Staff Mar 02 · 6 min read "This month we have yet more great product discoveries to present from Composite RC Gliders, Lee Valley, Old School Model Works and the number one most requested item is now in The RCSD Shop..." This month's Cover Photo T-Shirt features this beautiful, 60s-vibe black and white image taken by Mike Shellim. Mike captured Kevin Newton giving Alvaro Silgado's Fox some prime motivation off the south face of La Muela, Spain in 2019. The sleeve art is also featured in monochrome and appropriately the shirt is only available in black and white. Check them out in the RCSD Shop.   Sponsored

Features

A Homemade 5m ASW-28 A lavishly detailed article on this unique, FES-equipped glider intended for mountain flying and GPS triangle racing. Pierre Rondel Feb 27 · 15 min read "I am taking my pen today to tell you about a nice project led by two longtime friends, Frédéric Hours and Joël Carlin who are both F3F competition pilots. This project was born three years ago and the first flight - I was lucky enough to attend - was made at the end of May 2020, at the end of the first lockdown. But let's not rush the steps and let's start by talking a little about the genesis of this glider..." What is F3L? New provisional FAI class for rudder/elevator/spoiler models launched via hi-starts. Ryan Woebkenberg Feb 25 · 4 min read "The new F3L class—previously known as F3RES—is a new provisional, international soaring competition for models limited to two meter wingspan. This class of plane uses only rudder, elevator, and spoiler controls (RES) and they are constructed mostly of wood. Over the past eight years or so..." Twist Distributions for Swept Wings Part 2: The stalling patterns of untwisted and twisted wings. Bill Kuhlman Feb 25 · 10 min read "Having defined and provided examples of lift distributions in Part 1, we now move on to describing the stalling patterns of untwisted and twisted wings, determining the angle of attack as from the location of the stagnation point, and how wing sweep affects the angle of attack across the semi-span..." Project ALTius Part 2: Getting our feet wet with 2D and 3D software workflows. Tiberiu Atudorei Mar 02 · 12 min read "In the first part of this series the author described performance glider projects as quite complex with a lot of repetitive and complex operations. He went on to explain how CAD software can be automated ... and manufacturing can be simplified ... With that knowledge in hand, he now proceeds with examples of how these tools are used..." Disposable Gloves Don't overlook the importance of this humble piece of PPE. Glenn House Jan 29 · 4 min read "Most epoxy systems can cause skin irritation or allergic skin reactions. Hardeners can be particularly severe skin irritants and sometimes can even be moderately corrosive to skin tissue. Consequently, you should always protect your skin from epoxy with protective clothing and gloves..." KAVAN Twin Shark 304TS A nice-looking, semi-scale EPO glider with performance similar to its full-size cousin. Pierre Rondel Feb 28 · 12 min read "KAVAN, a well-known manufacturer in the world of aeromodelling, has been offering for a few years a range of EPO (expanded polyolefin) foam kits, planes and motor gliders. New for 2022 is a pretty cute baby of 2.7m wingspan, a semi-scale model of the Czech company HpH's Twin Shark 304TS full-size glider, a modern two-seater. This is the review of this new kid on the block..." 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

Ongoing Series

Science for Model Flyers Part V: Evolution and Visual Acuity Peter Scott Feb 25 · 14 min read "Our bodies are wonderful machines. The story of how they evolved over time is a fascinating one. The drive in nature to breed selectively those random 'favourable variations' that improve survival to reproduction age have resulted in very ingenious but sometimes imperfect devices, a good example being our eyes..." Condor Corner Using glider simulator training to thrive under adverse conditions. Scott Manley Mar 01 · 6 min read "In the introductory article for Condor Corner in the New RC Soaring Digest ... I invited SSA members, clubs, and commercial operations to contribute to the article by submitting narratives of their positive experiences using glider flight simulation. The following account was provided by John Duke..." Soaring the Sky Podcast E089: Soaring in the Philippines with Rolf Dunder Chuck Fulton Feb 28 · 2 min read "On this episode of the podcast Chuck first heads to the Philippines and talk with Rolf Dunder. He originally learned to fly in Hamm-Lippewiesen, Germany but is currently the only glider pilot soaring in the Philippines. Rolf started soaring in 1979 and soloed in 1980 at the age of 15..." Tired of that errant drop of epoxy ruining your new cashmere sweater? Is balsa dust your constant companion even when you're finished sanding for the evening? Or do you simply want to look good while working on your latest creation? In that case, you need the 100% organic cotton RCSD Shed Head Shop Apron available in four great colours, one size fits all. Check them out in the RCSD Shop.   Sponsored

Retrospectives

Stamps That Tell a Story A series from Antigua celebrating the achievements of the Wrights. Simine Short Feb 26 · 5 min read "The Postal Service of Antigua issued a set of seven postage stamps plus a souvenir sheet in honour of the first powered flight by the Wright brothers in 1903. One of the stamps (top left in the montage above) shows their 1902 glider in flight..." A History of Gliding and Soaring in the Inland Empire (1930-1940) A look back at the early days of soaring in southern California. Gary B. Fogel Feb 26 · 14 min read "As soaring became increasingly popular in the 1930s, many locations in southern California were adopted as regional "glider bases." These included the well-known Point Loma and Torrey Pines in San Diego, and locations such as Hollywood Riviera and Long Beach in the Los Angeles basin among many others..." Glider Patents US 4759736 A: Folding Wing Glider The New RC Soaring Digest Staff Feb 26 · 21 min read "A folding wing hand launch glider having two modes of operation is disclosed. In one mode of operation a portion of the wings are retracted and so produce a reduced air resistance and lift, while in the other mode of operation the wings are fully outstretched so that the airplane glides..."

That's a Wrap!

The Trailing Edge We're glad you brought up the subject of deadlines. The New RC Soaring Digest Staff Mar 03 · 4 min read "Yeah, we know you didn't but they're much on our minds this month so we're going to talk about them anyway. In his near insatiable desire to bring you, the reader, an incredible volume of great stories each month, The Ed can sometimes be - shall we say - a bit 'enthusiastic'. We don't spend a lot of time making hay about it but your stories really are lavished with our attention when they arrive. They're worth it..."

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