Hi all
I am finishing up my Funtana and want to use Du-Bro Ball Links on both ends of the rudder,ailerons, and the elevator. Just don't know where to get threaded rods on both ends .Any help will be appreciated.Or any other setup ideas.Thanks .
John

www.ultimaterc.com
chief aircraft
horizon hobby

i usually will always put a z bend into the servo wheel then a ball link or clevis on the contol horn to each flight controls.

ken

Thanks for the help guys.I think I will go with the Z bend.
John

I did the review for R/C Report magazine and I went to 4-40 rods for the ailerons with a Z-bend at the servo end and the DuBro bolt-through ball links on the control horn end.

Please don't use the Z bend.The Aile will get loose in about 30 flights. I used a ball link on the servo arm and soldered a steel clevis on the control horn end. I have seen some control horns at the LHS with a ball link built in. I may try those in the next project. By the way...Are you using the longer servo arms on the servos? I had to in order to get the required throw.

David

David
Thanks for the info.I don't even have my servos in yet so don't know.The review I read on RCU they used ball links on both ends.My problem is I can't find any push rods threaded on both ends.Do you think it is ok to use threaded rod .Thanks.
John

Just use a good solder on steel clevis at one end. All thread isn't really stiff enough unless you sleeve it with carbon fiber.

The threaded rod is a little week. You can stiffen it with a sleeve but then it's added weight. I'll put I pic below of how I did it.

David

p.s. Those are Du-bro servo arms

Here is the pic.

Thanks for the picture.That clears up alot.I am pretty new to the whole rc world so this forum is helping alot.I feel comfortable with my flying but it will be a while before I use full deflection on this bird.Thanks again.
John
PS any picture of your elevator and rudder set up?Thanks.

here is my elevator setup.. This is my second Funtana... I had problems with the 2-56 rods on my first one so i went a bit overboard for this one.

I am trying something different here. I soldered a control horn onto the elev joiner wire (should have made longer). There is a picece of carbon tube to take the stress on the joiner wire where it goes through the fuse. The pushrod is threaded 4-40 with a carbon fibre sleeve over it and dubro 4-40 ball links on each end.

Notice the extra control horn?? on my first funtana i had a HS81mg on each elevator whick worked fine.... If this setup didnt work, i will use dual servos on this one too, so I put the control horns in before assembly to assure alignment with each other.

Rudder and ailerons are set up the same

Dirtdr, didn't you use the CF stab braces?

Did you use the dubro swivel ball links or the heavey duty ones?

psyco, no i did away with the braces.... on my first one the braces didnt last long and i had a horizontal stab failure (ripped off in flight).
So on this one as well as my first I took it upon myself to rebuild the horizontal stab with hardwood trailing edge and put the carbon support rods into the structure of the stab to give it strength. This worked very well on my first funtana and should be just as strong if not stronger.

PlagueWielder;
I used the heavy duty ball links from du-bru - the 4-40 size ones..

Huh? Carbon fiber sleeves on all of the push rods in this plane wouldn't even be enough weight to register a difference. In fact, if you use 2-56 rod and sleeve it with carbon fiber the end result is a push rod that is substantially stiffer than a plain 4-40 rod and weighs less to boot.

Sorry stick. I read your answer to quick. The sleeves i saw a guy using were some kind of yellow plastic not carbon.

David

No problem. Here's a pic of mine. 2-56 all thread with 5/32" carbon fiber sleeves JB welded on. Sullivan Golden Clevises.

Thanks for the reply Stick Jammer.I llike your tail wheel set up better than stock.I just made some skis for my Goldberg Falcon to go try out tonight.
John

What servo arms did you guys use? Dubro Servo Arms Super Strength Long?

Thanks

Yea, mine are Du-Bro. I could not get enough throw without them.

David

Thanks

Without wantin' to sound a little anal... from the picture shown here, you guys have some real nasty geometry going one with your push rod angles and your servo arm to control horn angles chaps!
Non of that is any good at all.
The rudder set up is by far the best of the bunch.

LOL...........
Waitiing for bla bla to get flamed for his observations of those push rod angles.
Honestly, they caught my eye also but I held my tongue.

Hey whats new.
I get flamed for everything.
I just say it as it is. Period.