Im trying to hook up my elevators I have servos on each side its very short distance I solderd the kwik links to the rods but Im wondering if one side needs to be threaded so I have some adjustment Any Pics would be helpfull I know this is probably a dumb #ss thing to ask

Yes it is nprmal when doing a pushrod to have one end be adjustable. Its nearly impossible to get the pushrods the exact right length when you solder the clevces on both ends. The 2-56 threaded end gives 1/112 inch increments of andustability. The 4-40 gives 1/80 inch incriments. Since 1/2 turn = 1/((thread count per inch)X2)

This is especially important when doing split elevators with dual servos... you have to MATCH the pushrod lenghts in order to get identical control geometry on both sides. (not super critical for basic flyability.. but extremely important in order to not have the elevator induce a roll)

While it is easier to adjust with one side threaded and the best method, you don't need to if your radio has sub trims and you are sure that your rods are already at the right lengths. I would go with one side being threaded, you can always red loctite it later if you want.

I am using split elevators with duel servos {JR} I need advice on the reversing Y or using a Futaba servo on one side P.s Does anyone have a close up picture on this set up and maybe any ideas on mounting the tailwheel to the rudder thanks for any help you guys can give me on this ,Mike..................(90" cap 21) Sachs 3.7

technically, that will still induce a roll. since your servo arms aren't lined up 100% using subtrims, the servos will move at slightly different rates due to the exponential caused by the rotating servo arm. (even if the end points are adjusted so the elevators are physically at the exact same endpoints, the servos won't be as far as the arc of the servo arm)

in other words, for dual elevator do everything possible physically before touching the radio.

The use of a Futaba servo will reverse the rotation... but may not have the 2 servos tracking each other exactly...

Better... is to use computer programmed mix to have the second servo (identical servos) on a second channel and reverse that channel's throw dorection.

Possibly better still is the new "Matchbox" servo travel and direction control device. (I believe that is the JR product... I believe Futaba males a similar function device with a different name.... I might have the 2 backwards...)

I've had OK results with a Y harness with a reverser circuit... but its not a perfect match at all throws. The circuit induces a bit of error... and no 2 sevos' position sensing pots are identical (well... maybe a modern digital servo pair would be able to have identical travel...) These do a very good job... but you have limited adjustability to match range and centering.

***************

The question now becomes... How accurate a match do you NEED?

For sport flying... the use of the Futaba and JR reversal may be good enough.

For intro level aerobatic competition... the reversed servos or the Y would probably suffice. (it'll be more accurate than the average pilot in Sportsman Pattern, and you will hardly see the difference.)

For intermediate Pattern and mid level IMAC... you want the Y or the computer radio mix... maybe the matchbox.

For Master level competition... you want NO error... digital servos and the matchbox.

In all cases... you want the mechanical geometry to be as close to identical (mirror image) as physically possible.

Ok good stuff here ! I dont have a good enough radio to mix Im just wanting to do some sport flying This will be my first big gasser So I hear these tip stall easy so my goal is just to get this big ***** plane in the air and land it in one piece Thats my Goal This is also my first plane to finish I got this plane basicaly an arf so Im learning alot too on the building side of this hobby wich by the way Is half the fun to me. I try to be very carefull how I word things on here because I need this website for help and the last thing I need is to come across as an *****hole what I have read on hear there is enough of those. But really I'm pretty darn ignorant when it comes to building But Man I cant wait to get home and start on something else Im telling Ya Boys I need some therapy someone send help to Indiana help help! Im ate up Gitterdun!

The plany you have will be a bit tricker to land than what you may be used to... Keep the airspeed up a little... let the wheels touch and go for a LONG "wheel landing" while getting used to it.

As you get familiar with the stall characteristics THEN you can start working fro the pretty 3-point style.

Do all your practice and experimental stuff WAY HIGH... then you have room to recover. (and keep the CG a bit forward while getting used to it... its harder then heck to get out of a flat spin wth a too far aft CG.)

GITTERDUN CAN NOT WAIT TO SEE THE BEAST TAKE TO THE AIR.....











FLY IT LIKE YOU STOLE IT///////
PEACE[8D]

Just curious. You're calling this a "gasser", and with split elevators I'm assuming it's a fairly large aerobatic plane, but you haven't said.

Which plane is it, and aren't you relatively new? (Not referring to RCU.)

I'm not trying to say anything negative, just wondering what you're getting into.

Oh and no way do you come off as an a-hole in any of your posts.
Dennis-

DB its a Cap 21 it has a 89" wing span I have a sachs 3.7 powering it and should be about 20lbs when complete its huge and frankly Im scared to death to fly it so the solution is not to untill I know I can I got this from a friend for free really I just paid for the engine and the plane came with it It was also a way for my buddies to introduce me to gas planes and to learn the building aspects of this hobby I'll tell ya Im glad they did because I find that so enjoyable to get home and work on that bird for a couple hours each night The few dollars here and there isnt so bad and I have all the time in the world to gitterdun This might not be a plane that I ever fly I might sell it who knows but It is impressive to look at because of its size( plus I did it In Miller lite paint sceme ) so it looks great ! I have a Thunder tiger 30L low wing with a 40 size engine I have not flown yet I think thats my next step But I dont see any reason to until the trainer is boring to me which is'nt even close to being that yet ! Im looking forward to going to Toledo Next weekend I'm going with My Buddies so if you see us out there be sure and say hey will ya We will have our t-shirts on OUTLAW AEROMODELERS !!!,Mike

Wish I were going to Toledo, but it's a bit too far for me this year. Maybe Mike (Minnflyer) will find you, I know he's going.

I thought you'd just posted about your first flight, so I was kinda wondering about a "gasser". Glad to hear you aren't planning on trying to fly it next month.

If I were you I'd hang onto it, especially if you're interested in aerobsatics. I'd guess you could be ready for it within 18 to 24 months if you fly a lot.
Dennis-