The JC30 has a choke that is spring loaded and will 'lock' in place if the throttle is in idle - but with the closeness of those two pushrods, that arrangement is not possible due to the geometry. If the spring on the choke is removed, what will stop the choke from closing during flight? Hummmmmm...anyone have a suggestion and pictures would be nice

I noticed the throttle arm has a vertical movement in addition to its forward/backward movement - thinking of using ball link with a "U" pushrod, first going forward, making a "U" turn and back to the servo. The choke arm on the other hand has more of a vertical movement to engage.....how have you seen this situation resolved?

Thanks,

Jerry

Is this the kind of problem you have? The new Walbros are being designed that way. Dan.
http://thecubden.org/carb/carbchoke.html

More websites you will need. Dan.
http://wem.walbro.com/walbro/group2.asp?FamilyName=WT

http://www.outdoordistributors.com/

Thanks Dan, I'll look into that procedure....seems simple enough....but then it can take me all afternoon just replacing a toilet seat

Jerry

jerry, Keep us posted on your progress. I’m going to have to start doing it too soon on my WTs. In fact, we all are going to be doing it one of these days. Dan.

Will do.

I am sad to report due to the firewall being in the way, the choke will not be used BUT by using a cut down ball-link, and a new arm, I got the throttle to work smoothly. The spring was removed and a 2.-56 threaded rod was used for the throttle. The first two pics show the problem with the supplied (short) arm, then notice in pic 3 the center hole on the larger arm. This permitted the arm to be more forward resulting in a straight push/pull with almost no vertical change. Last two pics are the final placement of the arm on the carb. Notice where the choke arm is now located - inside the fuselage and firewall.

That choke requires a 90 degree push to close the choke - and that push must come directly from above or below - ugh - maybe a 90 degree bellcrank resulting a push/pull to a up/down movement?

Anyway here are some pics....

Tailskid, it sounds like you removed the spring that opens the choke and also removed the mechanism that forces the throttle in to a fixed position when the choke is engaged. You can use another servo to open and close the choke or setup some kind of manual operation. Without the dedent in the choke shaft a manual operation will have to include some kind of friction device to hold the choke in position. Is that what you are going to do? Dan.

I haven't removed the spring from the choke - yet - but the choke arm is inside the fuse and next to the firewall....darn, we just might have to go without a choke on this one

No Choke? Now, wait a minute. Dan.

With an electric starter, open throttle 1/2 spin her!

With these gas burners you can get around the choke issue -sometimes

Looks like the arm could be replaced to make it a little longer. I have started putting servos on my chokes, and love it. Having all of the control on the TX is very nice. Otherwise, I really like using a Golden rod cable for the linkage. I run them back to a hatch on the sides of my planes, sort of a control panel, with all of the other switches and such in there.

On my last install, a DLE 55 on a GP Ultimate bipe. I removed the detent ball so the choke would swing freely, and I put a servo on it. Works great.