throttle linkage end source

[pmnewlon]

The ball-socket of the right angle linkage part of my throttle cable is a little loose. I would like to replace it and wonder if anyone knows where to find just this part?

[gasman]

Here is the correct part from Van's catalog...... https://www.vansaircraft.com/cgi-bin...ct=re-bearings

You might also want to look at your mixture cable installation. It could fail in idle cutoff position with that solid cable.

[RV6_flyer]

Originally Posted by pmnewlon

The ball-socket of the right angle linkage part of my throttle cable is a little loose. I would like to replace it and wonder if anyone knows where to find just this part?

I use something very similar on my Carb Heat control. Mine is a part that is spring loaded to remove and I got the part number from a Gumman Tiger owner. I purchased the parts from FletchAir in Texas. FletchAir Catalog shows the part as C508. I think it was around $28 when I purchase the assembly.

Aircraft Spruce also has some Ball Joint Assemblies and a Ball Joint.

[Neal@F14]

Originally Posted by gasman

Here is the correct part from Van's catalog...... https://www.vansaircraft.com/cgi-bin...ct=re-bearings

You might also want to look at your mixture cable installation. It could fail in idle cutoff position with that solid cable.

Yes, the rod-end bearing is a vastly more secure and desirable way to connect the throttle cable to the carburetor or fuel injection throttle body. Having the simple ball and socket connection fail on my old hotrod cars in the past, I would not want to use one of those on an airplane.

[lr172]

You can find a Heim joint (Rod End) at McMaster carr for about $5.

Larry

[pmnewlon]

Thank you guys for your helpful responses! I have ordered from Van's and McMaster - we'll see what diffs there are and which get to Ohio faster. Either way I'll have a spare. I will also take a look at the mixture cable.

[jrs14855]

I find that many builders do not have a clue how to properly install a cotter pin. AC43 has guidelines on this. The portion wrapped around the end of the bolt should be trimmed at the center of the bolt, no longer than the edge or the bolt. The end around the nut should be trimmed just short of where the nut contacts the throttle arm.
Regarding the mixture control end, I much prefer simply drilling the appropriate size hole in a AN4 bolt. This method eliminates the severe bend in the wire and in my opinion is far less likely to fail. The certified Pitts aircraft use the drilled bolt method.
Regarding the throttle cable, if using a standard rod end bearing causes issues with the location of the throttle cable housing, use a spacer between the rod end bearing and the throttle arm. NOT a stack of washers but a spacer made from a piece of steel tubing.

[pmnewlon]

Good catch jrs14855 I didn't see that but sure fixed it. Thanks!

[airtractor8]

Regarding your solid wire mixture cable setup. If you didn't want to mess with it you could always fit a safety return spring to the control arm. That way if the cable brakes the mixture will go to full rich.
These can be had from Robinson Helicopter. They are fitted to R22 helicopter carb mixture control arms that have the solid wire setup. I dont have the part number but I'm sure any Robinson parts supplier can help you with that.
I have one on my carb'd 0320 powered 6.

[pmnewlon]

Originally Posted by airtractor8

Regarding your solid wire mixture cable setup. If you didn't want to mess with it you could always fit a safety return spring to the control arm. That way if the cable brakes the mixture will go to full rich.
These can be had from Robinson Helicopter. They are fitted to R22 helicopter carb mixture control arms that have the solid wire setup. I dont have the part number but I'm sure any Robinson parts supplier can help you with that.
I have one on my carb'd 0320 powered 6.

Funny you mention that. The A/P working on inspection with me asked me to put a return spring on the throttle so that it doesn't go to idle if the cable breaks. I bought two springs, will have to see if I can find a good place to put the spare on the mixture.