Click on this link to go to the actual Gliders Group Forum.
I, David Higgins, as well as a team of persons behind the scenes at this website called KC Free Flight—are hoping that a number of Glider enthusiasts will embrace this idea of a GLIDERS GROUP FORUM that showcases Gliders of all sorts. A chance to ask questions, offer advice to fellow aeromodellests, and generally have the ability to weigh in on matters of Gliders—large and small, simple or complex.
First, let me introduce myself so you can better understand why I’m so passionate about aeromodeling in general and gliders in particular.
Growing up during the 1960s, I started out at around 4 years of age flying the 5 cent slip together balsa wood Strato Chuck Gliders made by North Pacific. These gliders didn’t stay up very long, but they did fly well enough to provide hours of flying fun. You could make them loop or do long, straight, gliding flights by simply adjusting the wing fore or aft on the fuselage.
Thermic Trio made by SUPERFLIGHT
Thermic Trooper made by SUPERFLIGHT
In the 7th grade I built and flew the Jetco Glider Trio, which had three different looking chuck gliders, and a year or so later I built a Jetco 30” span Trooper glider and then I scaled up the Trooper glider 50 percent and scratch built a 45” Super Trooper glider. Both these gliders were covered with silkspan, were towed up in the air with an electric motor driven handheld winch, and both flew gracefully.
Many years later, in the fall of 1993 while working at the Boeing Everett plant, I heard about a new free flight model airplane club that had recently been formed called BEAMS, which stands for Boeing Employee’s Aerodynamic Modeling Society. At the first BEAMS meeting I attended, I met the club’s founder and first president, Keith Varnau, and one of its regular club members, Jeff Renz, who was putting the finishing touches on his Comet Sparky rubber powered model. Keith had won the 1967 Nationals in the outdoor hand-launched glider event and another BEAMS member, the late Will Broughton, was a retired Boeing aeronautical engineer with many years of balsa chuck glider experience. Those two men taught me just about everything I know about simple balsa wood hand-launched and catapult-launched gliders. They mentored and encouraged me, so that I had enough successes to keep me interested and motivated enough to design, build, and fly these deceptively simple flying models.
HAFFA Members Take Note:
At the right we have an historic image of Jeff Renz (our current President) holding the original Island Flyer.
Go to our article about this and view/download the drawing of this famous airplane model here. It’s a great plane for novice builders!
Jeff Renz and Kieth Varnau — at 60 acres with original Island Flyer
Getting started in building and flying simple balsa catapult-launched gliders can be somewhat intimidating at first, especially when you go to a contest and see the glider gurus with their carbon-fiber composite, pop-up wing gliders making perfect transitions at incredible heights. For those of you who have never successfully built and flown a simple catapult glider, I recommend the FP-11 Mk. II Catapult Glider.
You won’t have a lot of time or money tied up into one of these simple gliders. For one thing, the glider utilizes what we call a flat plate airfoil wing that is made from 1/16” thick sheet balsa, so you aren’t going to expend any time or effort carving and sanding a cambered (curved) airfoil into the wing blank.
The FP-11 Mk. II catapult glider has a flat plate airfoil wing and weighs 8 to 10 grams.
It takes around 1 to 4 hours to build the FP-11 Mk. II glider, although we had one of our SAM 8 club members spend around 40 hours building his, and although it was a very pretty glider, its performance was horrible, probably due to its heavy weight. Using average weight wood for the wing and tail parts, and rock-hard wood for the fuselage, the FP-11 should weigh around 8 to 10 grams ready to fly without the nitrate dope or Minwax Helmsman Spar varnish finish.
The SAM 8 model airplane club that I belong to decided to have a mass launch FP-11 catapult contest in the fall of 2020. Many of our club members had never built or flown a simple all balsa wood catapult-launched glider, but with $100.00 in prize money for the owner of the last glider to land, we had 9 adults and 3 kids eagerly enter the contest. We had two fly-off rounds with our club president winning the $100 final round. Everyone had a blast launching and watching 12 gliders as they climbed or looped, and then crashed or glided to a smooth landing. Some of our club’s members were astounded at how well these simple gliders climbed and glided.
The Sweepette-Ette 14 catapult-launched glider has a carved airfoil wing.
After the contest was over, one of our club members told me that he had had a great time and wanted to build a more advanced and higher performance catapult glider having a carved airfoil wing.
I told him that he could either build a new FP-11 glider having a carved airfoil wing made with 1/8” thick balsa, or he could build the Sweepette-Ette 14 Catapult Glider.
Webmasters Note: By clicking on the above link you will be taken to one of a variety of gliders by none other than our David Higgins—the moderator of this forum. Browse through Dave’s and other glider projects featured on the KC Free Flight Galleria of Gliders web page to decide on your next glider project!
As a young kid, that humble little 5 cent Strato glider got me interested in anything that flew, which eventually led to a 29-year career as an engineer with Boeing. Simple all balsa catapult-launched gliders provide more fun for the money than just about any other form of aeromodeling. If you do decide to build and fly the FP-11 catapult-launched glider, don’t be surprised if it catches a thermal and flies away. Mine almost did, so I installed the Flip D.T. (Dethermalizer) System on it.
Click on this link to go to the actual Gliders Group Forum.