RF Cascade Workbook 2018 by RF Cafe

Academy of Model Aeronautics Government Advocacy Coalition - Airplanes and Rockets

Academy of Model Aeronautics (AMA) Plans Service - Airplanes and Rockets

Welcome to the Airplanes and Rockets Website

Cavalry of the Clouds

Cavalry of the Clouds, March 1937 Flying Aces - Airplanes and RocketsArch Whitehouse's air adventure stories with wily ballistics expert and ace pilot Kerry Keen (alter ego, The Griffon) are one of my favorite reads in the vintage Flying Aces magazines. While testing their amphibious Black Bullet over Long Island, aviator Kerry Keen (the Griffon) and mechanic Barney O'Dare spot a stolen experimental aircraft - a winged fortress capable of carrying tanks. When Barney vanishes mysteriously, Keen discovers his partner has been entangled in a plot to steal "Avalin," a revolutionary armor formula. The trail leads to kidnapped movie star Doreen Yardley, who unknowingly received the formula- all while protecting Keen's masked identity...

The Boom in R/C Boats

The Boom in R/C Boats, June 1955 Popular Electronics - Airplanes and RocketsThis article entitled "The Boom in R/C Boats" appeared in the June 1955 edition of Popular Electronics magazine which, during the early years of its existence devoted quite a bit of print space to radio control airplanes, boats and cars. As with all things electronics, a huge surge in consumer interest was occurring with over-the-air communications. Bill (William) Winter served as the editor of the Academy of Model Aeronautics' (AMA's) American Modeler and American Aircraft Modeler magazines from 1966 through 1974, but his efforts to promote all form of modeling - airplanes, helicopters, cars, boats, trains, and rockets - covered many decades. His first recorded article, "Building the Famous Udet Flamingo," (co-authored by Walter McBride), was published in the March 1935 issue of Universal Model Airplane News magazine...

More... About Stunt Theory

More... About Stunt Theory, March 1957 Model Airplane News - Airplanes and RocketsIt would be interesting to do a side-by-side comparison on what was considered engineered control line stunt model airplane design in 1957, when this article was written, to what is today considered to be optimal design criteria. I am trying to get back into control line stunt flying and have one model built currently, the Enterprise-E. It has been flown a few times and is (was) extremely sensitive on the controls when set up per the plans. A little bit of control handle movements resulted in a huge amount of both elevator and flap deflection. Fortunately, access to the flap control horn is available through the removable top fuselage hatch, so I was able to relocate the pushrod from the bellcrank to the flap horn, and then from the flap horn...

Lite-Brite by Hasbro

Lite-Brite by Hasbro - Airplanes and RocketsWhen Melanie and I got married in 1983, part of her dowry included some of the toys she had as a little girl. A Hasbro Lite-Brite was one of them. Our kids played with it when they were young, but somewhere along the line during our many household moves, it disappeared. We probably donated it to the Salvation Army at some point - a lot of our stuff has ended up there. About a month ago we started watching for a good one on eBay that didn't cost too much. Finally, there was a 1967-vintage Lite-Brite in like-new condition up for auction that we got for around $45. It has a nice box...

Wild Bill Netzeband's Control Line Capers

Wild Bill Netzeband's Control Line Capers, October 1961 American Modeler - Airplanes and RocketsPer "Wild Bill" Netzenband's report in this 1961 issue of American Modeler magazine covered the Vancouver Bi-Liners, MAC highlights, Alan Nichols' success in Thompson Trophy Racer events, encouraging clubs to adopt the affordable, and slow-flying contests. He addresses backlogged club crest submissions, noting the impracticality of featuring all due to volume. Alan Nichols debunks the myth that models wear out quickly, citing his year-old Nobler and a five-year-old Fierce Arrow with original engine. Memories resurface of McDonnell Aircraft's picnic air shows, where Phil Hamm's reliable metal jet stood out. Southern California's new Control-Line Association, led by John Gudvangan and others, seeks enthusiasts. Detroit's Metropolitan Speed Association unveils an $8,000 Rouge Park speed circle, aiming for a competitive...

Pilots Matter in Age of Autonomous Planes

Why Pilots Matter in Age of Autonomous Planes - Airplanes and RocketsThis article entitled "Why Pilots Will Matter in the Age of Autonomous Planes" appeared in the June 2025 issue of IEEE's Spectrum magazine. "Long after planes start flying themselves, humans will still be in the loop. In August 2001, an anonymous guest posted on the forum at Airliners.net, a popular aviation website. 'How Long Will Pilots Be Needed?' they wondered, observing that '20 years or so down the road' technology could be so advanced that planes would fly themselves. 'So would it really be useful for a person to go to college now and be an airline pilot if a few years down the road they will be phased out by technology?' Twenty-four years later, the basic technology required to make aircraft fly themselves exists, as evidenced by the fact that most commercial flights are flown largely on autopilot..."

Flyin' Jenny Comic Strip: February 8, 1942

Flyin' Jenny Comic Strips: February 8, 1942 Baltimore Morning Sun - Airplanes and RocketsThis is the February 8, 1942, "Flyin' Jenny" comic strip. The Baltimore Sun newspaper, published not far from where I grew up near Annapolis, Maryland, carried "Flyin' Jenny" from the late 1930s until the strip ended in the mid 1940s, so I saved a couple dozen from there. The first one I downloaded has a publication date of December 7, 1941 - that date "which will live in infamy," per President Roosevelt. Many Americans were receiving word over the radio of the Japanese attack on Pearl Harbor while reading this comic at the breakfast table. I expect that soon there will be World War II themes. "Flyin' Jenny," whose real name was Virginia Dare (what's in a name?), was a test pilot for Starcraft Aviation Factory who divided her time between wringing out new airplane designs and chasing bad guys. She was the creation of artist and storyteller Russell Keaton...

Peanuts Skediddler Collection

Peanuts Skediddlers Collection - Airplanes and RocketsThis is the complete set of Peanuts Skediddlers, sold by Mattel. Linus is extremely difficult to find, and when you do, he typically sells for $200 or more. If you find a Linus Skediddler with the original box, expect to pay $400. Over time, our (Melanie and me) Peanuts collection of memorabilia has grow from the few items she had left over from her girlhood to complete sets. Everything was gotten via eBay auctions. It took a lot of patience to be able to get good quality items at an affordable price. Here is a bit of history I gathered on the Skediddlers. Phenomenon: In the mid-to-late 1960s, Mattel capitalized on the explosive popularity of Charles M. Schulz's Peanuts comic strip by releasing the Skediddler - a line of friction-powered toys. Unlike wind-up mechanisms, these toys relied on a simple push-and-go design: sliding them across a surface activated internal gears, causing the characters' limbs and heads to jerk in a whimsical "skedaddling"...

The Reds Aren't Stallin'!

The Reds Aren't Stallin'!, February 1949 Air Trails - Airplanes and RocketsThis 1949 Air Trails magazine article warns that the Soviet Union has surpassed the U.S. in military aircraft production by a 15-to-1 margin, with advanced jet fighters, bombers, and long-range piston-engine planes already operational. Soviet scientists have also conducted atomic tests and are close to producing compact A-bombs. Intelligence reveals a Red Air Force of 15,000 first-line aircraft, including 2,400 jets, some surpassing American designs. The Soviets broke the sound barrier before the U.S. and have developed powerful turbojet engines, some with innovative features like variable-pitch stators. German scientists and captured technology accelerated Soviet progress, particularly in rocketry and jet propulsion. Their aircraft feature advanced construction techniques, such as metal-plywood sandwich wings, and superior armament...

Glider Winch Construction Article

American Aircraft Modeler Glider Winch Construction Article (April 1973 American Aircraft Modeler) - Airplanes and RocketsA long time ago (circa 1977) I bought a used glider winch at an auction held by the Prince Georges Radio Club, in Maryland. It cost me somewhere around $25, which was a lot for me in the mid 1970s. The motor and control circuitry was contained in a plywood box, with a jack for the foot switch and terminals to clamp jumper cable to from a car. In looking at these plans for the AAM Glider Winch shown here from the April 1973 American Aircraft Modeler, it looks a lot like mine, only mine was in a wooden box. It worked extremely well for my 99" Windfree and 99" Aquila sailplanes. Unfortunately, I sold it shortly after getting married in 1983 (couldn't eat the winch). I would love to have it back. Actually, what I would rather have at this point is a winch that is powered by a cordless drill that would be lighter...

Weather Surveillance by Satellite

Weather Surveillance by Satellite, March 1967 Electronics World - Airplanes and RocketsWe take for granted most of the technology that surrounds us. Unless you were alive 60 years ago at the dawn of microelectronics and space flight, it would be difficult to imagine a world without cellphones, desktop computers, color TVs, the Internet, and even satellite-base weather forecasting. Everyone likes to make jokes about weathermen being no better at predicting the weather than your grandmother's roomatiz[sic], but the fact is that, especially for short-term (2-3 days) predictions, we get pretty good information. As a model airplane flyer, I check the wind level forecast nearly every day to see whether my model plane can handle it. AccuWeather's free hourly forecast is usually pretty darn accurate for today's and tomorrow's wind...

Phineas Pinkham: Smoke Scream

Phineas Pinkham: Smoke Scream, March 1937 Flying Aces - Airplanes and RocketsIn this 1937 "Smoke Scream" in a 1937 issue of Flying Aces magazine, by Joe Archibald, Lt. Phineas Pinkham, the 9th Pursuit Squadron's resident troublemaker, stumbles into chaos when he encounters an elephant named Hungha Tin and its Hindu mahout. After the elephant drinks a bottle of arnica meant for a local's backache, it goes berserk, wreaking havoc across the Allied camp. Meanwhile, Brigadier Scruggs confesses to Pinkham that he sleepwalked and handed top-secret battle plans to an unknown spy. Pinkham, framed by the mahout - who's actually a German agent - unknowingly smokes a drugged cigarette and nearly flies a stolen Spad to the enemy. The vengeful elephant interrupts his forced defection, allowing Pinkham to escape with Hauptmann von Spieler as his prisoner. Back at base, Pinkham...

Control-Line Aerodynamics Made Painless

Control-Line Aerodynamics Made Painless, December 1967 American Modeler - Airplanes and RocketsThe Academy of Model Aeronautics is granted tax-exempt status because part of its charter is for activity as an educational organization. I think as time goes on, it gets harder for the AMA for fulfill that part of its mission because presenting anything even vaguely resembling mathematics or science to kids (or to most adults for that matter), is the kiss of death for gaining or retaining interest. This article, "Control-Line Aerodynamics Made Painless," was printed in the December 1967 edition of American Modeler magazine, when graphs, charts, and equations were not eschewed by modelers. It is awesome. On rare occasions a similar type article will appear nowadays in Model Aviation magazine for topics like basic aerodynamics and battery / motor parameters. Nowadays, it seems, the most rigorous classroom material that the AMA can manage to slip into schools is a box of gliders and a PowerPoint presentation...

Aeronautical Antiques

Aeronautical Antiques, from April 1957 American Modeler - Airplanes and RocketsPeter Bowers first became know to me because of his Fly Baby homebuilt airplane. It won the Experimental Aircraft Association (EAA) design contest in 1962. Back in the middle and late 1970s, I was taking flying lessons and dreaming big about building my own aerobatic biplane. Being an avid woodworker, the Fly Baby appealed to me because it was constructed entirely of wood, except for a few critical metal fittings. My plan was to build the biplane version of the Fly Baby. Like so many other things, the aeroplane never got built. Peter Bowers was not only an aeronautical engineer and airplane designer but also an aviation historian and model airplane enthusiast...

FlightGear Open Source (Free) Flight Simulator

FlightGear Open Source Flight Simulator - Airplanes and Rockets"FlightGear" is an Open Source (aka Free) flight simulator program which I first wrote about in 2012. It has come a long way - and was pretty dran good, aven back then - and is now a viable competitor for Microsoft's Flight Simulator (MSFS). The leatest release as of this writing is 2024.1.1. The graphics are superb and easily on par with MSFS. FlightGear has a joystick interface, but I don't own a joystick, so my experience with it using keyboard inputs. VR headsets are also supported now. The basic download comes with a couple dozen aircraft, and there are many additional models available as separate downloads. FlightGear runs on Windows, macOS and Linux. Thanks to all the folks who have spent their valuable time developing FlightGear! FlightGear website: "FlightGear is an open-source flight simulator. It supports a variety of popular platforms (Windows, Mac, Linux, etc.) and is developed by skilled volunteers from around the world...

Sketchbook, October 1950 Air Trails

Sketchbook, October 1950 Air Trails - Airplanes and RocketsThe October 1950 Air Trails magazine showcases modelers' innovations, including H.G. Oliver's Plexiglas skids for speed models and Don Nelson's booster battery setup. Ray Biernacki suggests keeping brushes soft with thinner fumes, while Richard Larson offers a footswitch for bench testing. Ted Jones improves dethermalizer safety, and Charles Francis simplifies its design. Willard Hafler's flying wing excels in speed and sport flying, and Leon Shulman repurposes a crankcase recess as a fuel tank. The magazine encourages readers to submit their own ideas, paying $2 per accepted sketch. These practical, cost-saving solutions highlight the creativity of mid-century model aviation enthusiasts, blending engineering ingenuity with accessible materials - a snapshot of hobbyist innovation in postwar America...

Hydro Hints - Pontoons for Airplanes

Hydro Hints - Pontoons for Airplanes, September 1949 Air Trails - Airplanes and RocketsGiven the "Hydro Hints" title of this article from the September 1949 issue of Air Trails magazine, I though it would be about model hydroplanes, but it turned out to be about designing and building floats (pontoons) for free flight and control line airplanes. Rise Off Water (ROW) has been a popular sport flying and contest event for about as long as model airplanes have been around. Unlike with R/C water flying, these floats needed only to function as launching devices since unless you are flying off a large body of water, it is unlikely that the model would also be landing on water. In fact, many ROW flights are initiated from a make-shift "puddle" consisting of a child's plastic wading pool or a small area in the ground that has been filled with water specifically for the event. Take-off run distances are extremely short unless the model runs into trouble or the floats and/or airplane are poorly designed...

Radio Controlled Model Sailboat

Radio Controlled Model Sailboat, April 1948 Radio News - Airplanes and RocketsAs you can tell from all the vintage modeling and electronics magazine I own and use to post various article, I am prone to waxing nostalgic about the days of yore. Being born in 1958, I am part of the last generation of people brought up at a time when patriotism, courtesy, manners, and civility was taught in school and in the public square by fellow citizens and even politicians. However, there are limits to my desire to enjoy the environment of the good 'ole days, and one of them is the need to build (often), tune, and repair nearly all the electronic equipment used in model aviation and model boating activities. This "Radio Controlled Model Sailboat" article from a 1948 issue of Radio News magazine is a prime example of what I mean. While knowing how to do all the work involved in the system created by these two Raytheon engineers is a great achievement, the work involved is extremely time consuming and takes away significantly from the time actually spent enjoying sailing the boat. Modern compact, powerful, reliable, relatively inexpensive, fully proportional, feature-packed radio systems are much preferred over the former. Here is a short tale of my own venture into R/C sailboating with a Thunder Tiger Victoria sloop, circa 2000...

Control-Line Aerodynamics Made Painless

Control-Line Aerodynamics Made Painless, July / August 1966 American Modeler - Airplanes and RocketsThe Academy of Model Aeronautics is granted tax-exempt status because part of its charter is for activity as an educational organization. I think as time goes on, it gets harder for the AMA for fulfill that part of its mission because presenting anything even vaguely resembling mathematics or science to kids (or to most adults for that matter), is the kiss of death for gaining or retaining interest. This article, "Control-Line Aerodynamics Made Painless," was printed in the July/August 1966 edition of American Modeler, when graphs, charts, and equations were not eschewed by modelers. It is awesome. On rare occasions a similar type article will appear nowadays in Model Aviation for topics like basic aerodynamics and battery / motor parameters. Nowadays, it seems, the most rigorous classroom material that the AMA can manage to slip into schools is a box of gliders and a PowerPoint presentation...

Tone Modulator for Radio Control

Tone Modulator for Radio Control from April 1958 Radio-Electronics Magazine - RF CafeDeclaring any kind of straight LC tank circuit to be high stability is a bit of a stretch when compared to the Q available simply by adding a crystal, even in 1958. Tone modulation was an early method for achieving remote control of model airplanes, boats, and cars. The number of channels with these tone modulation systems is two times the number of modern proportional systems in that moving the rudder left took one channel and moving it right took another. Up and down elevator likewise took two channels. Therefore, this four channel system is only two channels by today's terminology. Technology evolved into fully proportional systems on crystal-controlled 27 MHz using pulse position modulation (PPM), then to 72 MHz, and today nearly every every R/C uses a combination of frequency-hopping spread spectrum (FHSS) and direct-sequence spread spectrum (DSSS) in the 2.4 GHz ISM band...

B−17 Flying Fortress (Memphis Belle) at Erie Airport

B-17 Flying Fortress (Memphis Belle) at Erie Airport - Airplanes and RocketsOn July 21, 2013, Melanie and I toured the inside of the "Memphis Belle" that was used in filming the movie of the same name. North Coast Air, based at Erie International Airport, hosted the event. This particular B−17 Flying Fortress is not the original Memphis Belle, but is a version that was produced in 1945, near the end of World War II. It is being leased by the Liberty Foundation for country-wide public tours while the ill-fated Liberty Belle is being restored. Rides were being offered for around $500 per seat, so we had to pass on that. I'd gladly pay the price if we could afford it, because the costs of operating such an aircraft is enormous. Fortunately, wealthy sponsors pay for the majority of the expenses. The Smithsonian of course has a fully restored B−17, but it sits in a museum and never takes to the air. The B−17's four Pratt & Whitney R-1690 Hornet radial engines make an unmistakable sound in the air, as do other multi-engine World War II era planes. I still run outside the house an search the skies when I hear such a sweet noise..

Monokote Sealing Iron Handle Repair

Monokote Sealing Iron Handle Repair - Airplanes and RocketsMy original Top Flite Monokote Sealing Iron, purchased in the mid-1970s, lasted until the late 1990s, when the heating element burned out. A quarter century of use was not too bad. To replace it, I bought a Tower Hobbies iron, and the first time I used it the handle started to bend where it transitions from a hollow round shape to a flat shape. The metal was noticeably softer than the Top Flite handle, which never even hinted at bending. For two decades I have had to be very careful not to press too hard on the iron lest it bend. After many times of bending and straightening the handle, a major stress crack had formed, and it was pretty evident that the handle would not last much longer. I would either need to buy a new Monokote sealing iron, which in all likelihood would be equally cheaply built since Top Flite does not make them anymore, or come up with some kind or repair for this one...

Modern Planes Album, December 1939 Flying Aces

Modern Planes Album, December 1939 Flying Aces - Airplanes and Rockets"...the new World War has clamped down the screens of censorship, hence we shall be lucky to get anything much in the way of info and pictures on new equipment to be used by the warring nations." That appeared in the December 1939 issue of Flying Aces magazines. Most people here in America think of World War II beginning on December 7th, 1941, with the Japanese attack on Pearl Harbor. In actuality, the war began much sooner with Hitler's and Hirohito's invasions in Europe (and North Africa) and Asia (South China and South Pacific), respectively. The accepted start date is September 1, 1939, following Hitler's invasion of Poland. Since a December magazine issue typically went to press in October or October, the war had only begun a month or two earlier. Of particular interest here (to me, anyway) is the Curtiss XP−42, obviously a modification of the P−40 Warhawk, but with a noticeably different cowl. Its shape suggests an inline type engine, but reportedly it housed a Pratt & Whitney Twin Wasp radial...

Mylar Trim for Models

Mylar Trim for Models article from the October 1972 edition of American Aircraft Modeler - Airplanes and RocketsAirplanes and Rockets website visitor Michael M. wrote to request that I post this article, along with the ones for the Satellite 1000 free-flight champion, and The Giants of Free Flight. His reason was that he wanted to get his flying team back together again in Bill Hunter, who passed away recently. This 1972 American Aircraft Modeler magazine article on covering with Mylar is very extensive and is another example of such efforts that were common in hobby magazines of decades ago - a large part of my motivation for making them available. It is rare...

Easily Made Fiberglass Cowls

Easily Made Fiberglass Cowls, 1962 Annual Edition American Modeler - Airplanes and RocketsWebsite visitor Dan T. (see his photos from a decades-ago use of this method) wrote to ask that I scan and post this article, which appeared in the 1962 Annual edition of American Modeler magazine, on making fiberglass cowls. It is a variation on vacuum bagging that exploits the even tension applied by the elasticity of a rubber balloon. Although limited to relatively small forms, it has the advantage of low cost and complexity, and it eliminates the potential nuisance of the mold release agent not being fully coated and causing separation issues. This method will probably not work too well with shapes that need localized indented areas more than 1/32" to maybe 1/16" deep (like cooling fins). The article did not originally make ...

How to Target AirplanesAndRockets.com for Your Google Ads

Google AdSense - it makes good sense - Airplanes and RocketsSome companies have expressed an interest in being able to target Airplanes and Rockets via the Google AdSense program. Yes, it is possible to do that. As you might expect, finding the exact information on the Google AdSense website is a bit difficult. This short video does a good job summarizing exactly how to implement the "Ad Targeting" option, then "Placements," and then add "Websites." Just enter   airplanesandrockets.com   . There are other settings to optimize your advertising campaign with keywords (both included and excluded), pricing, scheduling, statistical data collection and reporting, etc. If you are currently using Google AdSense, then please consider this method, and if you are not using AdSense, now would be a good time to look into it. I have had reports from some companies that experience great results using AdSense (not just on Airplanes and Rockets)...

Quick Floats Article & Plans

Quick Floats Article & Plans - May 1973 American Aircraft Modeler - Airplanes and RocketsAirplanes and Rockets website visitor Rob P. wrote to ask that I post the construction article for George Wilson's "Quick Floats," which appeared in the May 1973 issue of American Aircraft Modeler magazine. It's nice to know that even with all the prefabricated floats available for purchase today that there is still someone who prefers to build his own. The original Quick Floats design was sized for a .60-powered stunt airplane, but you can easily scale them up or down as needed to fit your model. I normally do not include a full-resolution scan in order to give the AMA Plans Service an opportunity to sell a copy (very low prices); however, a visit to their website does not show a listing for Quick Floats. Click on the plans images below for the larger versions. Beware that scans from the magazine may contain skew ...

Bristol "170" Freighter Article & Plans

Bristol "170" Freighter Article & Plans - 1961 Annual Edition American Modeler - Airplanes and RocketsWebsite visitor Robert C. wrote to request that I post the article and plans for the British Bristol "170" Freighter that appeared in the 1961 Annual edition of American Modeler magazine. This control line version has a 40" wingspan and is powered by a pair of .049s for scale-like flight characteristics or a pair .09s if you want aerobatics. Diesels are shown installed in the original. The fuselage, wing, and tails surfaces are all built-up and sheeted with balsa, so she is a sturdy bird. As with most of these vintage models that used glow engines, conversion to electric can be easily made, and lightening of the structure can be safely done since motors do not create the extreme vibration loads of internal combustion engines. For instance, the balsa sheeting of the entire wing could be reduced to only the root area at the fuselage, and then maybe add a stringer or two along the leading edge top area...

AAR Quiz: Models and Manufacturers

Quiz #1: Models and Manufacturers - Airplanes and RocketsYour knowledge of model aircraft kits, engines, and equipment will need to stretch back a couple decades to score 10 out of 10 on this model-aircraft-themed quiz. Winners get a free 1-year subscription to the Airplanes and Rockets website ;-)   Good luck!

Revell Visible 1/4th−Scale Visible V−8 Engine Kit

Revell Visible 1/4th−Scale Visible V−8 Engine Kit - Airplanes and RocketsRoughly fifty years after my first failed attempt at building a 1/4th−scale Visible V−8 Engine kit, I decided to buy another and try again. It is amazing that the kit is still produced (by Revell now, not the original by Renwal), especially given that very few of the old V-8s - the ones with points and condenser ignition, mechanical carburetor, belt-driven cooling fan, etc. - are running anymore. Many, unfortunately, were destroyed as part of the heinous Cash for Clunkers program in 2009 that served primarily to remove from service classic cars and trucks from U.S. manufactures ...but I digress. If memory serves me properly, back in the era by the time I had all the moving parts assembled and installed, none of them moved anymore ...

Sterling Cirrus Sailplane Kit

Sterling Cirrus Sailplane Kit - Airplanes and RocketsBack in the early to mid 1970s, I built a Sterling Cirrus sailplane kit. Shortly thereafter I bought my first radio control system (a used 3-channel OS Digitron), and in a somewhat desperate attempt to fly an RC glider, actually managed to cram two of its huge servos, a huge metal-cased receiver, and a NiCad airborne battery pack (the only part that has not gotten smaller in the intervening 50 years) into the cockpit area. Although the cockpit was very spacious, the balsa frame construction was way too weak to support a radio system, but that didn't stop me... well, not right away anyway. The ready-to-fly weight was probably three times the recommended 12 ounce nominal. Although the Cirrus has a generous 87-5/16" wingspan, with it 25:1 aspect ratio, the root chord is only a little over 4" and the wingtip chord is around 1". Even with vertical sheer webbing between the upper and lower main spars, the wing was far too weak for so much weight. After much work covering the undercambered airfoil and compound curves around the fuselage with Japanese tissue and brushing on a few coats of clear dope, it was finally ready to fly...

RF Cascade Workbook - RF Cafe




RF Electronics Shapes, Stencils for Office, Visio by RF Cafe