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Old Feb 09, 2016, 08:49 PM
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been taking night classes at FSU (Florida State-NOT!)
my first 2 builds
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Old Feb 10, 2016, 02:21 AM
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looking good.... did you use a KF on the delta?
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Old Feb 10, 2016, 07:46 AM
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Quote:
Originally Posted by davereap View Post
looking good.... did you use a KF on the delta?
the orange color is folded from bottom to top on both, any relation to KF is coincidence, I did it for strength.
there is a small CF tube folded and glued into the sandwich near CG
flys great and very light on wing
built that one for combat
it is based on design in this thread:
http://www.rcgroups.com/forums/showthread.php?t=1729627
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Old Feb 12, 2016, 03:56 AM
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you will find the coincidental KF gives added stability and smooths out flights, as well as adding strength...
For KF builders the strength from more than one layer is another bonus ... try a KFm4 build for even more strength if you are powered combat flying...
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Old Feb 12, 2016, 06:17 AM
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Quote:
Originally Posted by davereap View Post
you will find the coincidental KF gives added stability and smooths out flights, as well as adding strength...
For KF builders the strength from more than one layer is another bonus ... try a KFm4 build for even more strength if you are combat flying...
you have a good link to KFm4?
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Old Feb 12, 2016, 06:41 AM
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No real need for a link. I just add a 3mm - 6mm depron or EPP top and bottom layer at around 40-50% of chord following the sweep of the wing. Like this delta puller of my own design
http://www.rcgroups.com/forums/showp...postcount=2233
Andy
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Old Feb 12, 2016, 06:55 AM
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nice!
thanks
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Old Feb 13, 2016, 03:01 AM
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here is the link to the KF building thread.. http://www.rcgroups.com/forums/showthread.php?t=1117276

there's a technical discussion thread as well... http://www.rcgroups.com/forums/showthread.php?t=1296458

KF's were first started/used by tony65x55 here... http://www.rcgroups.com/forums/showthread.php?t=558321
and they have been developing since then..

you will find a couple more short threads where various KFbuilds are shown and re-linked to their own build threads

despite the foam KF wings popularity among those who have tried it, relatively few modelers know of KF wings.. Not all modelers build their own foam models , more modellers seem to go for the traditional balsa builds or buy RTF models..... so the very easy build , and good performance of a KF section gets passed by...
For any powered sport models, be it RTF or built up, their wing can be replaced using a quick and easy KF section.. this includes all the Flitetest builds, all those made from the cheap foam board...

Flitetest even did a talk on airfoils.. the KF section starts at 4 mins and goes on to the end....
.
Flite Test - Airfoils - PROJECT (9 min 47 sec)
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Old Feb 13, 2016, 04:58 AM
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Here's an oldish video showing different KFm airfoils being tested back to back on the same model aircraft
KF Airfoil Testing!!! (see sidebar) (9 min 25 sec)

Andy
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Old Feb 13, 2016, 08:46 AM
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I think I'll try that on the canard should prove interesting
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Old Feb 16, 2016, 11:34 AM
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whats needed radio wise for wings

i have a noobie question, what radio do you need to fly a wing? i have herd the words elevons and delta mix when flying wings please a short explination before buying a radio. thank you
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Old Feb 16, 2016, 12:00 PM
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Flying wings do need elevon mixing in the transmitter. Get a computerized radio which can do this for you rather than trying to make a custom mix yourself. There are radios out there which can do this for under $100 but I personally use Spektrum DX6 and DX9 myself.
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Old Feb 16, 2016, 01:10 PM
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There are also some gyros that will do mixing where you don't use TX mixing ... can help with flying in wind.
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Old Feb 16, 2016, 04:13 PM
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Quote:
Originally Posted by patch flyer View Post
i have a noobie question, what radio do you need to fly a wing? i have herd the words elevons and delta mix when flying wings please a short explination before buying a radio. thank you
Flysky fs-i6 has all you need and a lot more for $50.
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Old Feb 17, 2016, 01:36 AM
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All new modern reasonably priced basic radios have mixing built in... If it doesn't then don't buy it...
Even a basic system will have a number of preset mixing choices ... plus a couple that you can setup manually..
cost wise....
Some of the cheapest receivers available are on the spektrum system.... my preferred sets ....these are great for foam ..cheapo.. models.... I use compatible REC's rather than the brand name units, orange, lemon, and some unbranded from various sources.. all have been good.. for the price of one branded REC I can get several of the unbranded units... all have had enough range...

Ive not used the flysky, so cant comment on their reliability...but these are also at the cheapest end of pricing range.... TX priced even cheaper than spektrum... however its worth checking on various lack of range issues reported with flysky...

All of the main , expensive , systems are perfectly fine... and if you are going to fly big expensive models, then its worth going with an expensive super setup of some kind for super reliability..

for foam stuff... cheaper sets are more than good enough...


elevon mix is used on flying wings... ...
it mixes the aileron servo and the elevator servo signals together.. and the result is that both servos move together ..so when you pull back on just the stick for elevator, both will move to give up elevator.. and for roll the aileron side to side stick movement will give one up and one down....
and all the variations between, depending on the stick position
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Last edited by davereap; Feb 17, 2016 at 02:08 AM.
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