kf airfoil - RC Groups
Thread Tools
Sep 26, 2009, 03:25 PM
Were..is..my..Super..Suit ..
j3tman's Avatar

kf airfoil

has any one built a foamie plane or jet using a kf airfoil. i saw a video with rcpowers trying to use one but i was wondering if anyone else has had success with one. If you have how would you construct it?
Sign up now
to remove ads between posts
Sep 26, 2009, 04:17 PM
Fly it like you stole it..
Tram's Avatar
Lots of guys using the KF airfoil in the scratched foamies.. Seems pretty simple, just fold the foam over on itself and call it a day..
Sep 26, 2009, 05:08 PM
Suspended Account
A huge KF thread can be found here:
Sep 26, 2009, 07:01 PM
Registered User
matthew73's Avatar
My first KF mod was to put a KF2 onto my Dekan f22. I just added 1 piece of 6mm depron to the wing and rounded the leading edge. Makes the wing much stiffer.

Plane flew a little faster, seemed more stable, didnt notice much increase in lift. But on second attempt, i put a KF onto a much lighter plane and really did notice baloon like lift.
Sep 29, 2009, 12:25 PM
Were..is..my..Super..Suit ..
j3tman's Avatar
thanx for the info i was looking at the build threads for a while to get an idea but does anyone have like a step by step how to make a kf airfoil i liked matthew73 idea of just sanding some foam on the leading edge but i was wondering if anyone had some pictures that they would like to share?
Oct 17, 2009, 07:41 PM
Registered User
matthew73's Avatar
Most KF sections should be 40-50 % of wing chord. The height of the step should be about 9% of wing chord. Roughly speaking.
Oct 18, 2009, 01:03 PM
Were..is..my..Super..Suit ..
j3tman's Avatar
the kf airfoil is about 40-50% and its 6mm high becuase thats how thick the epp foam i using (cant really change anything). i am planing on putting a kf airfoil on top and on bottom like the one on the bottom (Kfm4) http://rcfoamfighters.com/blog/wp-co...-60percent.jpg. this will make my go faster with more stability while still makeing it sporty like (i hope)
Oct 20, 2009, 09:09 PM
Were..is..my..Super..Suit ..
j3tman's Avatar
does any one have any pics of kf airfoils i have the basic idea of how it works i just want to someone else doing it
Oct 21, 2009, 07:06 AM
Member 120mph Club
ATIS's Avatar
use the link in post 3, a ton of picts
Oct 21, 2009, 09:34 PM
My plans are in my blog
Rusty-Gunn's Avatar
When I was using FFF I used a simple KFm step at 50% on top, mostly for the strength it gave the wing set.
My mothod of doing this is to measure the step at 50% of the wing at both the root and tip. I laminate this step on top.
Oct 22, 2009, 05:04 PM
Were..is..my..Super..Suit ..
j3tman's Avatar
hey Rusty-Gunn did you sand the edge down to make more aerodynamic or did you just slap it on there?
Oct 23, 2009, 10:01 PM
Were..is..my..Super..Suit ..
j3tman's Avatar
i was lookin through the kf airfoil pics on some other threads. What would you recomend for a parkjet i want it to fast and do tricks but also slow flight to. after rethinking my plane design would you chose to put kf airfoil on top or both top and bottom?

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Idea The Custer effect/Foamies /KF airfoil ... ??? gpw Foamies (Scratchbuilt) 269 Feb 13, 2010 04:22 AM
Discussion F-117 profile Pusher with KF airfoil. burkefj Pusher Prop Jet Models 60 Sep 10, 2008 10:30 PM
Discussion KF airfoil - Why ?? lake flyer Foamies (Scratchbuilt) 108 Jul 17, 2008 08:51 PM
Discussion KF Airfoil Questions Mr.Me Hand Launch 6 Aug 28, 2007 05:54 PM
Yippee! A tribute to Mr. Dick Kline and the KF Airfoil dougmontgomery Foamies (Scratchbuilt) 10 Jun 26, 2007 07:24 PM