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Posted by tiretrax | Jun 03, 2014 @ 03:13 PM | 1,704 Views
I gotta tell ya, these darn flat foam wings are way too much fun to be legal! This is from Saturday. We spent about 6 hours in the air, giving hell to Fan Fold Foam. There were 4 flytraps and 1 kato trying to take each other down. All in all, the Flytraps took the punishment and most are still up for next weekends slaughter

Check the build thread here;
http://www.rcgroups.com/forums/showthread.php?t=2164254

FLYTRAP and KATO RC Glider Wing Combat (4 min 16 sec)

Posted by tiretrax | May 29, 2014 @ 12:05 AM | 1,407 Views
This is one of the coolest planes I have got to fly in a long time. It's a home made 3D slope flyer made and designed by champion hand launch pilot Paul Anderson. At first the short coupling throws one off. It seems most sloperbatics and 4axis flyers have been leaning towards more of an f3p style fuse design and a making the fuse pretty long. I really like Paul's approach by keeping the stab closer to the fuse. It might seem that it would lend pitchiness to the flying characteristics but this thing was rock solid and really out performed the other long fuse 4d planes I've flown. Plus it lets you keep the battery a little closer to the wing and makes direction changes quick and dramatic. It had no bad traits. He used a stock multiplex wing off a production model, changed the aileron locations and fab'ed the rest from EPP and depron. I gotta have one of these! Here's a little video I snapped. The plane is about 3 years old and flew like it was on rails. Thanks for reading.
Troy

Paul Anderson's home built Acrobatic Sloper RC Plane (0 min 44 sec)

Posted by tiretrax | May 10, 2014 @ 09:43 PM | 2,187 Views
What a day at the beach. It finally happened. Flat foam flies! I have a huge surprise for everyone interested in making the ultimate glider wing using a KF airfoil. Wait until you see this super fast building wing fly. I'll have video and plans up shortly.
Posted by tiretrax | Apr 05, 2014 @ 08:38 PM | 2,025 Views
Blew threw a whole bunch of razor blades today. Now onto the champagne of beers, it's miller time. Started at about 8am with 3 ideas in my head and there ain't too much better than finishing them all up by 3pm. Gotta love "phlat phoam". Tomorrow all three will either be in the air or in the trash! Let's cross our fingers and see what mother wind brings for lift. If she has a sense of humor, she'll have just as much fun watching me pack these babies in, as joggers do.

Three planes, one day, 15 razor blades and about 6 beers to relax the tendons from all the slicing.
Posted by tiretrax | Apr 05, 2014 @ 01:15 PM | 1,659 Views
The dream of a consitantly fun Flat Foam Sloper is closing in on a couple of design ideas. First off is the new PHLANK Project. The Phlank (flank) is a super simple build with a full RM Airfoil created by Rusty Mustard. This should make this design come alive.

PHLANK:
WS: 41"
CHORD: 4"
CONTROLS: 1.5"
SERVOS: HXT 5gram
RX: 4ch Micro
BATT: 700 LiFe 2 cell

The second concept is a mix between a bunch of Favorites. It's the all NEW REVERT 3.0. It takes it's design from the original revert and mixes in The PHLANK, The Swifter, Stanly Chan's Beetle, Rusty Mustards RM Leading Edge with KF/ Kamm-back rear step. I cleaned the fuse up a bit with some inspiration the Bluto.

REVERT V3.0
WS: 39"
CHORD: 5"
CONTROLS: 1.5"
SERVOS: HXT 5gram
RX: 4ch Micro
BATT: 700 LiFe 2 cell

The best thing about these two slopers is that they are landing at $20 total cost to build including electronics and battery. Total build time is under 2 hours each. YES!!!
Posted by tiretrax | Apr 04, 2014 @ 11:32 AM | 2,676 Views
I may have to do a build a log on this but should probably wait until she has a successful maiden. The PHLANK, short for Flat Plank, looks pretty cool and if there is any luck in making her fly, I will cutout the revisions on the Phlatprinter and forgo the razor blades in favor of letting the CNC machine do all the number crunching. This is where the revert and the swifter where headed when I shelved the concept of easy build, fast flying the KF wing design from FFF because of drag issues. I'm sure the KF step is a masterpiece but it is really more suited to be made with a hotwired, real airfoil and not soley purposed as the solution for cheating with flat plate wing structures. Us flat foam Nazis are just exploiting any opportunity to get something to work and cut that build time down. I am speaking for myself of course

If it takes too long to build, then it ends up sitting on the shelf, so for me, it has to go together quick and there is no such thing as fast in regards to build time with hotwired wings. It's a shame that I always shy away from them after having some great planes and I do have the CNC hotwire cutter and EPP to make anything, but what can I say, I love the flat foam...

So the idea here is to take the revert or swifter design to the next level. That means a thinner chord, smaller control surfaces and wider wing span. The theoretical results should be a faster, less draggy design but will be more sensitive in CG.

What is exciting about the Phlank?
...Continue Reading
Posted by tiretrax | Mar 31, 2014 @ 11:39 PM | 2,020 Views
I am very excited about Rusty Mustards new potential airfoil discovery. It seems with some trick edge detail, the quest for a truly simple and fast building flat foam foil concept may be within reach. I'm putting "RM's" design to task this week and see if I can achieve similar results like he is showing in his inspiring videos. Very cool stuff. He says it's outperforming his PW51 air foiled wings in speed too. Check out the info and see for yourself. Nice work rusty. Simple is an art!

http://www.rcgroups.com/forums/showthread.php?t=2130789
Posted by tiretrax | Mar 31, 2014 @ 04:28 PM | 1,690 Views
Ok, it took a little time, but I finally got someone to hold the "video-phone". Here's what I have found to be the fastest and easiest way to make sharp leading edges and great airfoils from Flat Foam. It works great for Fan Fold, Dollar Tree and Depron. Also, as a little bonus, the beginning steps show a super fast way to bevel those pesky control surfaces using a piece of glass and ruler. Give it a try and throw away those pesky bevelers.

Fallowing this video will be a couple of new plans for two Fan Fold Sloper models, one called the Dragster, and the other will officially be named, the Kline Backer. Both are Elevon ships and will make building slopers even cheaper and faster......

They say airplane enthusiasm is down and everyone is flying multi-rotors these days, but to me, "that ain't flying"! Nothing beats a scratch built Foam Plane, right? Thanks for reading.

Post your thoughts here in this thread and let's get flat foam sloping on all local hills...

http://www.rcgroups.com/forums/showt...8#post27951959

How To Make a Sharp Leading Edge in Flat Foam for RC Planes (1 min 58 sec)

Posted by tiretrax | Mar 25, 2014 @ 01:36 PM | 1,962 Views
Not to beat a dead horse here, but progress is coming fast in the "flat foam foil" development project. I may start a thread about it so we can share ideas.
Here is what hit me yesterday. It leaves the KF concept slightly and brings in the Kammback design. The two main design criteria are low % of thickness and sharp leading edge. Both concepts are really easy to achieve independently but to mix both with a quick build concept, is really tricky. I think we are almost there. Just need to get the foil in the air and test. Hopefully have some results and two new models to match. Stay tuned.

More Kamm info here:
http://en.wikipedia.org/wiki/Kammback

Troy
Posted by tiretrax | Mar 23, 2014 @ 11:35 AM | 1,923 Views
Yesterday was Kato Fest. Kato is a symmetrical air foiled combat-ish flying wing. It'is very similar in planform to the long loved Wing Warrior Raider (one of the best flying combat wings ever made) but where the Kato stands on it's own, and quite frankly leaves the raider and all others in the dust (except for the halfbad wing, of course, haha) is it's thin airfoil and acrobatics ability.

The man behind the Design, kbstingwing (aka; Kevin) really built something amazing here. JGAFF built one up for me and I flew it at the event. It was right up my alley. So acrobatic and the inverted flight was flawless. It lost no climb rate when she was upside down. I love this wing! Unfortunately the Kato is not in production but JGAFF can build you one and Matin, from North County Flying Machines is cutting the cores. So maybe there is still hope to keep this one alive.

Wings have come and gone in popularity but they will always be a staple for any slope enthusiast. It's what I learned to fly on in 98, I think. A zagi LE. Then I moved to the very first EPP wing, the Boomerang. Talk about a leap forward. I have long forgot the history on the boomerang but I think we all owe a debt to that design as well. At least anyone who loves slope wings like I do.

I landed at the event early, like around 7:00. It was over cast and flat (wind wise). 15 minutes later the wind sock was standing straight out and blowing the right way, for a change. The big lift held on all darn day. Simply...Continue Reading
Posted by tiretrax | Mar 21, 2014 @ 12:23 AM | 2,421 Views
I had a breakthrough today. It has to be shared. How long has it been since the Kline Fogleman airfoil concept has been introduced into RC? Well here's a hint, years now. And since we first started naming the concept, it has produced so many amazing models and creations that I don't know when there could be time to build and enjoy them all. So here's to Dick Kline, the originator of a concept that has found it's way into the hearts of all fast build foam RC plane designers around the globe. Cheers Dick....

And to celebrate, I have made a milestone, for me anyway. I think the first Revert and KF48 slope glider designs are over five years old now and maybe even more. The one thing that I have learned about the "KF" wing concept for slope designs is that the leading edge likes to be sharp. The sharper the better in fact. With that said, anyone putting two sheets of 6mm or 0 .250" knows you end up with nearly 1/2" of air brake on the front of our wings. without the ideas created by Viking60, the Revert, nor the KF48 or the Swifter never would have been. His heat smashing the LE concept allowed a pretty slim "frontal lobe" of the wing and gave the slightly, ok moderately, DRAGGY Fan Fold Foam style building concept, some "wings".

The problem with "heat smashing" the LE is that it looks pretty bad once you're done beating the wing into a pulp with the mono-kote iron. So these cool little ultra fast build slope concept wings...Continue Reading
Posted by tiretrax | Mar 20, 2014 @ 01:21 PM | 2,641 Views
Here are a some old planes that I made and dug up from the archives. Thought I'd post 'em for reference before they disappeared into the cyber abyss. There are tons more but for now they are hiding somewhere in the pile of old hard-drives. Maybe they can be used for ideas or something. It never get's old looking through cool RC plane pictures ...Continue Reading
Posted by tiretrax | Feb 22, 2010 @ 09:25 AM | 2,950 Views
Here is a quick video of the halfbad sloper blown up 100% to 48".
All up weight is only 16oz. No spar, 1600 nimh 4.8v pack, hs-82mg servos and sullivan rods covered in white packing tape.

http://www.youtube.com/watch?v=xlH5l2lkIDc