hey guys,
im installing the throttle and choke servo for my big wild hare beast (Edge540t 28%).
I looked at the instructions on the web, and by the looks of it i would have to elevate the servos real high up to get those linkages nice n strait with the DA 50r. Do the linkage rods have to be strait and level or can they start higher from the motor and then go down lower to where the servos will be? Thanks guys

Regards
Monte Udrzal

I am working on my choke and throttle for the DA 50 in the basement right now so I don't have any pics for you. I know a lot of guys are using piano wire. I don't know if they are bending it or not. I'm going to use nyrod as to eliminate the metal. Once again most guys say the piano wire makes no difference. Anyway I am installing the throttle servo up and the choke servo facing down. The nyrod has very little bend to it. It seams everyone does it differently. Bill

When I did my 540 28%, I placed the throttle and choke servos
in the cutout just forard of the wingtube. Used a dremel to enlarge
the small hole in the firewall, so that two carbon fiber rods could be
used for the throttle and choke control. The favored West Coast
version. It keeps the servo to reciever wires on the right side of
fuselage, away from the ignition wiring on the left side. Music wire
without some kind of metaless connector at the motor would be a
no,no. Almost certain to cause RF noise. Not all recievers have
RF filters or chokes built in and you could have trouble. Be very
sure to do a power on range check, no matter how you do it.

Gerald

Cutout fwd of the wingtube, right side of fuselage.

Monte & Bill, I am also working on my throttle & choke linkage. I should have it done some time Sunday and I'll post photos. I am also putting both servos in the left side in front of the wing tube. I am using "Arts Hobby" carbon push rods with 4-40 ends & ball links on both ends of the choke. The throttle has a ball link on the servo end and a "Sullivan Locking Sleeve Ball Joint" on the carb side. I am building a 28% Edge with a DA50 that has both linkage connections on the left side of the plane. It sounds like Rockyaged has a older DA50 with the linkage on the right but I'm using the same type set up.
WW2 Ace

First try to avoid using metal pushrods that goes from the engine to the servos,,,, I use the Sullivan Semiflex Gold-N-Rod with a Dubro ball-link on the engine arms and dubro kuick-link on the servo arm here the link for the pushrod.
Sullivan Semiflex Gold-N-Rod w/Gold-N-Clevises 36" (2) http://www2.towerhobbies.com/cgi-bin...?&I=LXFU92&P=7

and here are some pics of my setup... I hope this helps!!!!

charrua
that is a good looking set-up!

I placed both servos as illustrated in the instructions..you only need 1/4" piece of balsa or ply to elevate the choke servo..I have been using 4-40 push rods with plastic ball links at each end with no trouble..I tried the nyrod but it flexed too much for me...

i use the black carbon fiber stuff that sullivan sells no flexing when its hot or cold

Hmm never saw that..Ill have to check it out

Here's my Edge and 300LX

I moved the servos back to near the wing tube on my Edge so that it would be less nose heavy.

i used hs-85 mg
and 4-40 rod with cf rod and ball links
put servos in cut out in fuse
good set up

[img][/img]

Nice setup Nash. I just might have to redo mine similar to yours. Bill

hmmmm, so many good ideas, do DA make different 50sizes looks like some people have right sided arms some have left sided arms on the motor? I have left side looking from the back of the motor. I think i will make a little platform like most people and if it dont work i can always try somthing elce. What size ball link do you use on the throttle and choke arms on the motor the holes look smaller than usual.

Regards
Monte

You can rotate the arms to either side but dont rotate the black reed housing

Thanks..


And.. I use 2-56 size links for the throttle and choke,, and the sullivan pushrods will not flez if the distance it's not too long!!!

OK guys, I just finished the throttle and choke linkages on the Edge/DA50 and below are some photos. The lever that I added to the choke lever is made from a Hitec servo arm. I drilled and tapped the choke shaft to a 2-56 thread the way DA/Walbro does it on the throttle shaft. There was no grinding the old lever off as you can see. I used the old choke lever to help lock the Hitec arm in place. It worked out very well if I do say so myself sm=tongue.gif] ! The push rods move very smoothly with no binding and as you can see they are aligned very well without excessive angles to the carburetor attachment points. I do have a few other photos or if anyone would like a specific photo just let me know.

Monte, The pushrods are 4-40 and all the ball links are attached with 4-40 screws. The only thing that is 2-56 is the ball that came with the Sullivan "Locking Sleeve Ball Joint" but they sell a 4-40. If I can find one locally I may change to the 4-40 but for a throttle linkage I think the 2-56 will be fine. Do any of you feel the 2-56 stud on the Sullivan "Locking Sleeve Ball Joint" is not good enough?

WW2 Ace

For those interested, Dubro sells a ball link with the name something like 2-56 ball link for 4-40 threaded rod. You don't have to enlarge or re-tap any holes that way.

Also, for those using a Brison 3.2, you can cut a hole in the right side of the engine box and mount the throttle servo there with very short and very straight linkage. The servo arm may have to be inside the box. No big deal. You will likely have to install the throttle servo in the tail to offset the weight of the servo in the nose. Placing the ignition battery in the engine box and the flight battery on the servo tray and all balances at or near 3.5 inches on the 28% Extras.

There's some really nice looking work taking place in this thread guys.

WW2Ace,
I couldn't open the last pic in each line. What am I missing in that?

I'm not sure SS, I was able to open all 7 photos. Anyone else having trouble.

WW2 Ace

WW2 Ace,
I use the same ball connecters on my BiPlane. I don't have it on the throttle linkage. I have them my Great Planes Pitts to connect the upper ailerons to the lower ailerons. Been flying it that way for 2 years. It makes the set up a lot simpler at the field and I haven't had any problems at all. The lingage rods are 4/40 and the pin that goes through the control horn is 2/56. It would have to shear the pin in order to fail. Of course I don't think that the ailerons have as much vibration as a direct connection to the carb. I don't think I'd be scared to try it. What's going to happen if it should fail, shut down the engine?? Just thought you'd like to know. Bill

OHH man WW2 Ace u have done it for me GREAT WORK
i wish i could build em like you

Thanks for all your help guys, its much appreciated, BTW i got my Graphics in the mail and they look amazing
there from http://www.aero3dgfx.com/, There resonalble price and are awesome, i suggest you check them out.

Cheers Dudes Your full of Great answers

Regards
Monte Udrzal
AUSTRALIA[8D]

For what it's worth, on my extra special after reading threads warning about potential tail heavy problems with a DA, I put both choke and throttle servos inside the motor box. Just glue and screw two hardwood rails inside the box at the appropiate heights. Old style DAs will require placement near bottom, new or updated DAs will need them toward the top. On my fifth or sixth gallon of gas through the engine, no problems with the servos.

Catfish 2, Do you have the rudder servo(s) mounted in the tail? I have not herd of a tail heavy problem on the 28% planes.

WW2 Ace

Catfish and Ace,

Just for your info, I have a 28% 300LX with DA-50. Previous info that I had read suggested the WH 28% planes may be tail heavy with a DA-50. My plane was just the opposite. It turned out to be slightly nose heavy.

To balance, I moved the 2-2100NMh back next to the pull-pull servo and mounted the ignition battery just aft of the motor box directly over the gear. It still could use more weight on the aft end. Won't be able to report on the flying characteristics until early spring when weather conditions improve.

Jaketab