Posts Tagged ‘rcfoamfighters’

MX-1 Wolverine

MX-1 Wolverine

Hey Everyone,

Just wanted to write up a quick announcement to let you all know there are some new plans posted on the “Planes” tab. This is an original plane designed, built and tested by our Colorado Connection, Jake Marshall. Jake really did a wonderful job on bringing this plane to life right out of his own mind. He wanted it to be a plane with an aggressive stance like a real Wolverine! I think Jake did a good job. He was excited and happy to have his plane added to the rcFoamFighters growing list of free plan downloads. Jake was a big help in that he drew most of the plans on his own in AutoCAD.  I only had to help with the final details and formatting. I was happy to have the help these busy days, LOL.  So I hope you all will enjoy the free plans and plane design Jake made and graciously wanted to share with all of us in the RC community. We look forward to more cool designs coming from Jake and his MESA school team in the future.

Here is a link to the Wolverines plans and info page:

Here is a video of the Wolverine in action:

Hey Everyone,

I have been getting quite a few emails from people requesting plans for my Project Jupiter plane. Well at this current time I do not have a complete set of construction plans. There may be some available in the future when i can sit down and draw all the details up for the plane like I usually do. This may take a little while as the Jupiter was kind of built with my “Free Flow” design method, basically making it up as you go. Scratch Building on the Fly. I did originally do some basic concept drawings at the Beginning, but that was about it.

So in the meantime, if any experienced builders would like the BASIC PARTS TEMPLATES and only that, I have created some PDF’s. Anyone deciding to try and build the Jupiter will have to improvise as I did and make up much of the design on your own. The PDF’s below are only the Basic Parts Patterns that can be used to cut out the major pieces of the Jupiter. I think anyone with some build experience can do that easily enough. The YouTube videos about the Jupiter may also be a little bit of help. Eventually I will make a more complete plan, but in the meantime the below PDF is available for free download.

Here are a few specs of the Plane:

  • 54-Inch Wingspan
  • 58 Inches long
  • CG is approximately 23-1/4 inches back from the tip of the nose.
  • 1100 to 1400 watts of power with 8×4 APC props.

If you are a beginner, I would not recommend trying to build the Jupiter. Again this is recommend for skilled builders who can improvise and finish on their own.

Click on Picture Below to get a free PDF plan.

Jupiter PDF

Jupiter PDF

Below are links to the Power system used for the Jupiter, (Two of Each).

(Click on Each Picture to follow link to HobbyKing’s website)

Turnigy Motor 3536-1400
Link to Motor

Turnigy Plush 60A ESC
Link to ESC

Batteries 2650 4S Lipo
Link to Battery

FF-Predator Version 1.0 (designed by Tim McMahan)

Hey Everyone,

I just finished up an early “Beta Test” set of plans for Tim’s Predator style RC Aircraft. This plane was loosely based on the Predator/Reaper UAV planes the US Air Force uses. It’s a little bit of a mix of both planes. If any of you have been watching Tim and Jon’s YouTube channel “The Bloody Micks”, you’ve probably seen Tim’s version 1 of this plane. that was the initial test bed that Tim designed himself. The plans posted below are based off this initial plane of Tim’s and also incorporate a few changes based on some of the things Tim learned in the field and also from some of the input of the RCFF team. Please just note this is still a plan in testing and most likely there will be further refinements to it as time goes. Tim has just had a lot of people asking for plans, so we are rushing out an early version for everyone. Good luck to all who decide to build this plane and we do welcome any feed back for this model that may help refine newer versions of this plan.

Thanks, Paul


Here are some notes from Tim:

“Well Folks, by popular demand, we got plans knocked out for the Predator.  Expect some add-ons in coming weeks, but there was enough demand for these plans, that we’re giving you something to get started. This plane was never intended to be power house, but its 60” span an undeniable lines make this graceful flier a real sight to see in the air. Here’s something to let you build your own, and in the meantime, we’ll see about some bells and whistles for it.

The version 1 Predator was powered with a 2212-10 from RC hot Deals, a 20amp ESC, a 3s 25-30C 1300mah battery, and ran an 8×6 prop. Using this set up, it was no speed demon or power house, but flew very gracefully with plenty of climb rate. The prototype was foamboard with a Fanfold wing and no tape, and came in around 22oz. There should be no issues going to all foamboard. Recommended control set up is Elevator/Ailerons. At 22-25oz and a top speed around 45mph, this should be an gentle parkflyer, with an unmistakable look. Additions are planned for this model, including landing gear, and a KFm3 wing.”

Link to Tim and Jons YouTube Channel with video of the FF-Predator”

Link to RC Groups Forum for this model:


(Click on Picture to Download Free Plan)

Free FF-Predator Template Plans

(Post updated 10/6/09 with new graphic from Dick Kline. Now includes 9 KFm Airfoil Variations. See below)


Hello everyone,

I just wanted to post a new graphic that Dick Kline was so kind to share with me. As many of you are probably already aware, Dick Kline the inventor of the KF Airfoil is always tuned into how we in the RC community are using his cool invention.  Mr. Kline also enjoys creating computer graphics of many things. Well recently Dick Kline sent me his revised graphic that depicts the well known variations of the KF Airfoil as well as some new versions that people are experimenting with.  Dick wrote me a few brief emails below with the attached graphic. I wanted to post it here and share it with the rest of the RC Community and all that may be interested.

Here’s the Emails:


I wanted you to have a copy of the visual I came up with showing all the different variations of the KFm Airfoil Family. They have multiplied like rabbits.

– Dick

Hi Paul…

Well, two more additions have arrived. One is an under-camber with the step on the top. So, that goes next to the under-camber with the step on the bottom. I’m told that they both work extremely well.

So, here’s the KFm Family of nine airfoils…

Take care,

– Dick

(Here’s the graphic made by Dick Kline, many thanks to him for providing it!) (updated 10/4/09)

Click on the image to Download a PDF copy.

KFm Airfoil Family with Descriptions

KFm Airfoil Family with Descriptions (click to download PDF)

Later I will try and get some written descriptions of each Airfoil and what benefits each provides.  So please stay tuned, we want to keep this blog going as a good resource for KF Airfoil information.

If anyone would like to contribute their findings on the KF airfoil please feel free to email us at We are hoping to help Dick Kline spread the word of his cool invention and share the collective knowledge we all have.

Happy Flying to all,




Hey everyone,

I just wanted to add a post to the blog on the Jupiter Project that we are just starting. This project is a collaboration with Dick Kline (the Inventor of the KF Airfoil) and rcFoamFighters. The original idea for this project started with a suggestion from Dick Kline, he asked if we could do a project that will compare the KFm3 and Clark Y airfoils.


Here is a brief intro to the project written up by Dick Kline:


When we filed for a patent on a stepped airfoil back in 1970, Dick Kline and Floyd Fogleman were hoping that it would be seen as a concept worth investigating because of the stall-resistance built into this idea. The Kline-Fogleman airfoil has many favorable characteristics that we felt could be investigated. However, we were met with a wall of resistance from all the experts. It was a terrible idea as far as they were concerned.

Our patent drawings, which showed a sharp leading edge were followed out the window in their wind tunnel tests. However, they were also applying conventional testing methodsto an unconventional airfoil. For example, there wasn’t any testing for a forward push directly behind the step. There was no camber applied along with a rounded leading edge. Our intention was to patent only a step, not an entire airfoil shape, because we knew that it worked in various configurations whether it was on the bottom or on the top. We chose to show the step on the bottom because we knew that L/D ratios reverse themselves when you go from subsonic to supersonic flight. And, we knew that the L/D was higher when the step was on the top, based on wind tunnel tests done at Notre Dame. Therefore, supersonically we would pick up the higher L/D ratios. So we showed the step on the bottom for that reason.

In a book called Fluid Mechanics by Frank White, he shows a number of NASA airfoils producing lift, then reaching a stall point. He also includes the KF airfoil which continues to generate lift out beyond 50º AOA even though it showed a flat upper surface and a sharp leading edge. Although this is a remarkable characteristic of stall resistance, none of the experts thought that it was worth investigating.

The KFm airfoils were embraced by the RC community starting in 2006, because Tony Bernardo decided to try a KF airfoil out for himself. He started a thread which is still going strong and has many contributors to the development of the KF airfoil concept. Today, people from all around the world have accepted the KF airfoil into their building techniques of RC aircraft. What they found was a very easy wing that they could build. Very inexpensive. Very strong. Very high in lift. And, very stall-resistant.

The acceptance of this radical concept still meets with great suspicion and disbelief. “It shouldn’t fly because it doesn’t look like a normal airfoil. It can’t work. It produces too much drag. It won’t fly.”

I have proposed an idea to the RCFoamFighters. What if we could demonstrate that a KFm3 airfoil can lift more weight than the icon of all airfoils: the Clark-Y. Wouldn’t that help to convince people that there is some merit to this radical idea of a stepped airfoil? If it can be demonstrated that the KFm3 can carry a heavier payload along with its ability to resist stalling, it should warrant a more in depth investigation, in my opinion.

Several years ago, Rich Thompsonproduced a comparison study between several KFm airfoils, a Clark-Y and a symmetrical airfoil. The KFm2 and KFm3 came out with very high marks overall. But this did not impress the people who are the experts. Maybe a real world weight-lifting test would persuade them to take a second look?

Who knows. Only time will tell.

In the meanwhile, what is known is that the KFm airfoils work extremely well in the UAV arena. That has been demonstrated successfully a number of times over. It takes a leap of faith to trust your camera, motor, batteries and servos to a strange-looking airfoil that is not supposed to work in the first place. And, have that aircraft return to you safely with all your precious equipment intact. Now, who wouldn’t want that advantage?.



After a few emails back and forth to Dick Kline, I developed a concept for the plane we could build for this project. We both decided it would be neat to build a plane in the style of a large Military Cargo Plane. Below is the Concept Drawing of the plane we will be building, the C-54KF Jupiter:

The C-54KF Jupiter (Concept #1)

The C-54KF Jupiter (Concept #1)


So in the coming weeks I will begin to build the plane out of EPP Foam. Once we get the plane built and flying good we will run it through a series of tests and comparisons with the KFm3 airfoil and Clark Y airfoil.

Last, here is the first video in the Jupiter Project Video Series:


Foam Fighter 15 (Version 1.0)

Foam Fighter 15 (Version 1.0)

Here is the Free Basic Template plans for the Foam Fighter 15 (FF-15). This plane was inspired by the F-15 Eagle, the US Air Force’s top fighter for many years.    Again this model is not a true replication of the F-15 but does share many of the features and looks. As always, the design is adjusted to help enhance the capability as an RC plane. Things like large airducts, slightly increase wing span and other minor deviations from the true shape of the F-15. I think it still resembles the actual plane, but again is not ment to be a true scale looking model.
The template plans also like usual are not intended to be all inclusive instructions, but just a basic template and guideline on how the plane can be built. This PDF along with the FF-15 video series we did on YouTube should help anyone wanting to build one these planes for themselves. This plane is a fast and agile model and may not be the best choice for someone just beginning to fly RC Airplanes.  This plane instead should be built by those with at least a bit of flying experience.  Anway, below are the free plans, best wishes to anyone who decides to build one!
(Click on below picture to download the FREE PDF Plan)

Click on picture to Download Frre FF-15 PDF Plan
Click on picture to Download Free FF-15 PDF Plan


Last, here is the YouTube Video Series we did on the original Foam Fighter 15:

Hey Everyone,

I just wanted to do a quick follow up post on the new “KF Condor RC Plane” that I posted video of on our YouTube Channel.  A few months ago I bought the book Dick Kline wrote, “The Ultimate Paper Airplane” . It’s the book where Mr. Kline tells his story of how his paper airplanes lead him and his friend Floyd Fogleman to the invention of the “KF Airfoil”.  It’s a really good book that tells about the theory of why the airfoil works and also tells about it’s wide range of flying benefits. The book tells of the many shows and articles that Dick Kline was interviewed on and for. From David Letterman to 60 minutes, Omni Magazine and so on. His airfoil was even tested by NASA. Dick Kline also has a patent for this awesome invention.

There are many people who have tried the KF Airfoil with good positive results, including my brother Frank and myself. We have both noticed a real difference when comparing similar planes with and without the KF Airfoil. The biggest good benefit I noticed was the slow speed stability of the KF airfoil equipped wing. Also the KF wing was much more responsive,  I believe because the KF airfoil keeps the air over the control surfaces better. This is all just my theory, but something we at rcFoamFighters want to explore more. And thankfully we have a new, good friend to help us, Mr. Dick Kline himself.

So, having said that, my next project I have decided to build with a KF airfoil will be a plane inspired by one of Dick Kline’s Paper Airplanes, The Condor. This plane will basically feature a KFm2 airfoil to resemble the wing of the paper airplane. I really like the look of this paper Airplane because it is unique with the smaller wings on top and rear of the fuselage. So I have drawn up a basic template for the plane in AutoCAD and I am now beginning to build the plane, so please watch our YouTube channel to see how it all goes.

Below I just wanted to share some pictures and a short write up Dick Kline himself sent me about his amazing plane, the Condor.

(below picture) Dick Kline with his Condor paper Airplane and a Wright Bros Replica Model



(Short email about the Condor from Dick Kline)

“Hi Paul and Frank…  …

Here’s the brief story on The Condor.

When I developed my first stepped airfoil, it had the step on the bottom. I was pleased with the way it flew, but like so many of us, I wanted to experiment some more once I nailed down the step on the bottom. When I placed it on the top I found out that it produced higher lift than the one on the bottom. It would climb higher and travel a longer distance. Later tests at Notre Dame confirmed that the step on the top was able to generate higher lift over drag.  I then played around with placing the elevators on the upper surface just in front of the rudder. After many different experiments and many different flights I had perfected The Condor, which would be the plane I would use to challenge the Wright Brothers distance record. In spite of very strong winds coming in off Cape Hatteras, I was successfully able to outdistance the distance record for the first manned flight of 122 feet. I did this in 1985 down in Kill Devil Hills, NC right on the spot where the Wright Brothers first flew. My distance was 401 feet, four inches. On the fourth flight that day of the Wright Brothers historic flight they traveled quite a bit further, so I was lucky that their first flight was just 122 feet.

Here is the data from the wind tunnel at Notre Dame. It would have been a lot higher if we had a rounded leading edge and a little camber. But we were interested in seeing exactly what the step produced by itself. Later, everyone would follow this configuration out the window and get poor results. This was our big mistake. But we also knew at that time that the step worked in different configurations and we couldn’t patent them all. All we wanted was to patent a step in the hopes that it would produce stall resistance to other airfoils. All the experts trashed this idea as too high in drag, yet the KFm4, with a step on the top and a step on the bottom, increases the speed of the wing. If the drag was so high, how could this be?

All in all, it has been a wonderful adventure and I feel very grateful and lucky for it. I have come in contact with many truly wonderful people in the RC community. From my perspective, the world could take some lessons from the RC people on how to work together, how to openly share information and knowledge freely and produce an environment of creativity and experimentation. This way everyone benefits and the learning curve climbs way up for everyone.

The gentleman who conducted these tests at Notre Dame was Professor John D. Nicolaides, the first head of NASA.”


Notre Dame test - Step on Bottom

Notre Dame test - Step on Bottom

Notre Dame test - Step on Top

Notre Dame test - Step on Top

Another  picture of a version of the Condor


Picure of a Condor Paper Airplane.

Picture of a Condor Paper Airplane.



Here is a picture of the RC Plane I plan to make. Note that the RC plane will more resemble the Condor Paper Airplane version as pictured in Dick Kline’s book “The Ultimate Paper Airplane”.  The Verison in the book appears to have a little different tail and the small wings on top of the rear of the fuselage appear to be larger. Anyway, here’s my attempted to make a plane in the style of the Condor.

My initial RC Plane Design for the Condor

My initial RC Plane Design for the Condor

In ending I would again just like to thank Dick Kline for providing the inspiration to create this cool RC plane.  Also many thanks to him for the photos, email stories and permission to try to make this project.
For anyone interested in learning more about KF Airfoil’s, Dick Kline or His Awesome Paper Airplanes please take a look at his book. Below I provided a link to where it is available at


Foam Fighter 23 (FF-23 version 1.0)

Foam Fighter 23 (FF-23 version 1.0)


Here are the Free Basic Template plans for the Foam Fighter 23 (FF-23). This plane was inspired by the YF-23 that competed with the F-22 in the Advanced Tactical Fighter (ATF) competition held by the Department of Defense.  It is not a true replication  of the YF-23 but does share many of the features and looks. Again these template plans are not intended to be all inclusive instructions, but just a basic template and guideline on how the plane can be built. This PDF along with the ATF  video series we did should help anyone wanting to build one these planes for themselves. I would not recommend this plane to beginners for it is a little more touchy to fly than the FF-22. This plane instead should be built by those with at least a bit of flying experience.
(Click on below picture to download the FREE PDF Plan)
Free FF-23 PDF Plan

Free FF-23 PDF Plan


Picture of the orginal Foam Fighter 22 (FF-22)

Picture of the orginal Foam Fighter 22 (FF-22)


Hey Everyone,

I’m finally getting a little time to start drawing up some basic plans for the planes Frank and I have been building. This will be the second FREE basic template posted to our blog. I plan on adding more as time allows, so please bare with us as we are very limited on time.

Anyway, below is a link to a Free PDF of the original Foam Fighter 22 (FF-22) plane I made a few months back. (Note this is not the template for my current EPP FF-22). For anyone who may not have seen the ATF video series, where I built both the FF-22 and FF-23 plans out of Foamboard, Please see the video series in the YouTube player below.  In these videos you can see how the plane was developed and how it actually flies.

Just to hopefully be proactive in answering questions on why I used Foamboard instead of Depron or Fan Fold Foam, it’s because it was another experiment we did to research the viability of using foamboard. We know foamboard is a lot heavier than Depron or Fan Fold, but we thought if you give the plane adequate power, having the extra weight can actually be good for stability in windy and other conditions. Anyway, I believe the plane turned out pretty good and I just wanted to share these plans with anyone who may want to try and build one too.

Please note too that I’m sure you could build this plane out of Depron or Fan Fold Foam and still get great results. I have not tried it yet, so if anybody does please let me know. I’m sure you will have to add some carbon spars in the appropriate areas as determined. Note the foamboard plane did not require any carbon spars.

Last I would just like to state these are not “complete building instructions”, but rather just basic templates for those who are inclined to do a little improvising and adapting there on twists to the plane.  We would like to by doing this hopefully help people become better scratch builders themselves and even coming up with and share better ideas then we may have had. Thats what scratch building is all about, improvising and making it your own!

So for anyone interested here is the link to the Free FF-22 basic Template plans. (Click on the below Picture to download the PDF Plan):

Click on the picture to get the FREE FF-22 PDF Plan
Click on the picture to get the FREE FF-22 PDF Plan

(Note: Anyone who  downloaded the PDF prior to 7-12-09, please re-download, I found I was missing template  page “P6”. It is now corrected. Sorry for the mistake, I think the late nights are catching up with me, LOL)

Link to the YouTube Video Series with the FF-22 build. Please watch to see how I built this plane along with the FF-23 plane. (FF-23 plan coming soon).