Terry,

Is this a Robert's bellcrank or a Brodak? They are slightly different and should not be used with a handle made by the other manufacturer (Roberts with Roberts, Bordak with Brodak).

Yes, there is usually some movement up and down even with a fairly new bellcrank and yes it looks like the pushrods can get in each others way. Just be careful and test it with a little bit of tension on the lines. Also leave plenty of headroom around the bellcrank so it doesn't hang up on a rib or the cutout that it sits in. It should not be a problem. I use a small clevis for the throttle connection so that it has the smallest profile (a "Z" bend takes up more space and has a greater chance of catching on something else).

Bob

Terry,

I haven't tried using one brand with the other but have been told that the throws are different. I guess that means that the one bellcrank has different movement parameters and when used with a different handle you may not get proper control. What this would mean I'm not totally sure but it may make for more complications than it's worth. I'd stick with one brand or the other and be sure.

Bob

Bob, thanks for the reply. I understand. What is the problem with using Brodak with JR and vise-versa?
Thanks, T
I haven't had a three line plane since 1974, it was a ringmaster that I used just as a sport plane with a McCoy 40 RC.... What fun!

As others have noted there is a travel difference between the two handles.  I have found using non-matching items that the throttle line can go tight and take all the airplane load.  Not a good thing if it's at full throttle.  The JR system was designed so that all three lines always had load on them so it is important to keep bellcranks and handle brands matched up.