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Old Feb 12, 2013, 05:22 PM
5,200 Led Lighted Bike-Bob P.
**neons**'s Avatar
USA, MA, Swansea
Joined Mar 2003
2,880 Posts
Jao.
Welcome to RC Groups. I am not an expert but I can suggest that you may have developed a bad warp in the wing. Look very close at the wing from straight on and from the side. if you use wood for spars on foam it is likely it warped. Temperature, sun, and moisture can attack foam also. Use of carbon fiber will generally hold a wing straighter for a longer period. I use Carbon fiber arrow shaft in all my planes. They are straight and very stiff.. This is only a starting point to look for your problems.

Next is the motor should have a degree down thrust and right thrust.

Next . Check the elevator to make sure it is truly straight. Measure from the wing tip to the elevator and the measure should be close for each tip measure. Make sure the incedance is straight on the same centerline as the wing and a line drawn from the motor centerline to the elevator line on the tail end.

Check lateral balance again to make sure one side of the wing is not heavier than the opposite side.

Maybe someone else may have more ides to check also.

Good Luck,
**Neons** Bob
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Old Feb 12, 2013, 05:23 PM
Team FlightPower AUS
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Victoria, Australia
Joined Nov 2002
630 Posts
You might have a slight warp in the wings. A large ruler across the wingtip at each end and then look down the wing to see if the rulers are parallel may help you check it. What you have described is not a common or known fault. Another remote possibility is that the servo may not be centreing correctly.
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Old Feb 13, 2013, 11:49 AM
Winter Haven FL
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Joined Dec 2003
508 Posts
Quote:
Originally Posted by joaopaul0 View Post
my Das Ugly Stik is tending to roll right.

I don't know why this is happening, because wing is balanced, ailerons are center trimmed, rudder is perfectly centered.

I need almost full left aileron trimming to stop rolling, it is very visible the diference after trimmed ailerons they are no longer centered.

Im lost, no ideia what to do now.
might be the positioning of the electronics inside the fuse. Hold it by the tip of the prop nut and a center point on the tail and see if it is balanced on it's centerline. re-install electronics to get it to balance.

BTW, mine needed a little right trim to fly right, but not full trim
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Old Feb 18, 2013, 05:48 PM
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Joined Jan 2013
3 Posts
thanks for the help.
the problem was cambered foam at elevator .
Now with little trimming it flies nice.
tired of belly landings, I gave it floats.



Floats maiden flight

Hidro Das Ulgy Stik (9 min 1 sec)


Motor Turnigy Aerodrive XP D2830
Propeller APC-E 9x6
Batery Turnigy 1600mah 20-30 C
ESC Birdie 30A
Wing 1 meter NACA 2412 , hot wire cut foam
AUW 560g (19.8oz)

This is my second build in RC models.
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Old Apr 11, 2013, 09:17 PM
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Joined Sep 2012
13 Posts
Thanks for the wonderful plans. I hope to get started on m build in a week or so. Newbie at building, but with the cheap price of foam, thought I would give it a shot.

on a side note, to the gentleman with the zip questions, if you don't want to download a program, just use windows internet explorer. if you have the latest version it should unzip it for you, that's what I use. hope that helps you some.

again thanks for taking the time to post the plans, and tutorial on the build.
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Old May 10, 2013, 08:47 PM
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USA, MO, Ozark
Joined Nov 2006
1,511 Posts
KFm3

Hi,
I've been helping a buddy build one for a trainer. He has done some flying on his own and this plane should help him along with building flying skills quite well. I'll take some pics next build sesion
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Old Jun 10, 2013, 12:05 AM
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USA, MO, Ozark
Joined Nov 2006
1,511 Posts
Maiden flight

Hey,
Got the thing in the air and had some trouble with Flutter of the tail feathers.
I think it will be quite the excellent plane if I can stiffen that up some.
Any one know the correct Milligrams of Viagra for a beast that weighs just a few ounces?
Actually I'm open for suggestions, it is stock per plans, 6mm EPP. The soft spot is the fuse towards the aft end as the vert. fin and horiz. fin move as a unit. I do have a BIT to much motor but will drop down one cell to two and that should be spot on for training.
I'm thinking light balsa tri-stock inside.
I'll add a bit of sheet balsa to the inner ailerons at the horn area as well.
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Old Jun 11, 2013, 02:31 AM
Team FlightPower AUS
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Victoria, Australia
Joined Nov 2002
630 Posts
It was designed for Depron. Its interesting that you have used EPP. It will certainly make it more ding proof.
My suggestion to try for the twist is to get bamboo or carbon skewers and pierce them through the fuz in a few places in a x fashion. I.e. if you look inside down the fuz you would see X. Reasonably easy to do and probably worth a try.
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Old Jun 11, 2013, 12:06 PM
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USA, MO, Ozark
Joined Nov 2006
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Rubber stick?

WOW
EPP wing worked OK I am stiffening the ailerons a bit too. The wing is fine as it is a KFm 3 with a spar. This fuse will have to be much stiffer though. The tail feathers have enough bamboo in 'em and do quite well.
As I mentioned it is a little bit overpowered, for outdoor use only, and I think that will end up being a good change.
I am going to open up the aft end of the fuse and add some rigidity inside.
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Old Jun 12, 2013, 04:32 AM
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USA, MO, Ozark
Joined Nov 2006
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KfM 3 pic and fuse redo

Well
Redoing EPP is tough do to the flimsiness so I aborted that and built a new one
out of Depron. Was able to reuse the wing and tail feathers. I reused the LG and it's plywood mount. I made it a rubber band attachment so it doubles as a hatch.
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Last edited by ozmo01; Jun 26, 2013 at 04:57 PM. Reason: PICS
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Old Jul 04, 2013, 10:29 PM
Registered User
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USA, MO, Ozark
Joined Nov 2006
1,511 Posts
It flys!

Hey stick E guys,
Flew with my student today and it went well. I had some issues with CG and throws prior to today but it handles very mildly now. Chris, my newest student. did just fine with it and was able to get it to stay (almost) in the pattern and he did well on keeping a set altitude. This plane requires a lot of elevator in its turns, and lands nicely with a little bit of power on. Rudder response was sluggish at best. Overall I like the KFm 3 wing.
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Old Jul 23, 2013, 04:22 AM
Fly More Crash Less
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United States, AZ, Prescott
Joined Sep 2007
1,386 Posts
My first scratch build and it is finally starting to look like a plane now. I cannot wait to finish my Ugly Stick.
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Old Jul 23, 2013, 07:06 AM
Team FlightPower AUS
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Victoria, Australia
Joined Nov 2002
630 Posts
I can't believe this thread is still active. Thanks to everyone who has been involved. It really is great to see Stiks being built.
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Old Jul 23, 2013, 10:35 AM
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USA, MO, Ozark
Joined Nov 2006
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timeless classics

Quote:
Originally Posted by pmjass View Post
I can't believe this thread is still active. Thanks to everyone who has been involved. It really is great to see Stiks being built.
It's cuz ya can't beat a stick with a "stick".
We are having lots of fun with the training using this plane!
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Old Jul 23, 2013, 06:32 PM
Fly More Crash Less
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United States, AZ, Prescott
Joined Sep 2007
1,386 Posts
It's a classic and great design that flies extremely well. I actually learned how to fly on my father's ugly stick back in the 80's when I was a kid so I have a soft spot for the good ol stick. I was going to buy one of the electric sticks from Great Planes until I came across this thread and decided to try my hand and my first scratch build. So far the toughest part was cutting all the parts out with a razor blade.
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