the "trick" is to keep your linkages short, and if not short, very well supported. As Express said a carbon rod over a 4/40 rod adds rigidity will also protect against bending if the rod is more than a few inches. I have a 1/3 Pawnee with a DLE 111 - not a 150, but it is a workhorse and definitely not light. It has H9 hardware all around. With a big towplane you should be able to get to 500 meters, which is the release altitude for the GPS triangle racers. have fun!

Another option.....scroll here ....

Sharing some pictures so you can get an idea on different types of linkages and control horns out there.

I am sharing with you all these pictures of 40% aircraft that weight between 41 and 48 pounds.

On these aircraft, i do not use any 4-40 turnbuckles or pushrods, but I know most people do.

I prefer to use 6-32 turnbuckles (if you can find them) or 4.0 mm turnbuckles (easy to find) or I make my own using 6-32 threaded rods and carbon fiber tubing.


the pictures are self explanatory.

hope this helps.

great thanks

where can i get the gold dual arms for servos from

Originally Posted by horsefeetky

great thanks

where can i get the gold dual arms for servos from

Airwild Hobby shop, but I believe they are out of business now.

McMaster Carr, fastenersinc.

I prefer the Hangar 9 heavy duty clevis systems in 10-32. I get them on EBAY now since they’ve become discontinued.

I have a few sets of Dubro monster ball links destined for a plane that will be here shortly. The fit between the ball and socket is tight enough that the friction between the two creates significant resistance to swiveling, unlike their HD links which I’ve found swivel freely. Too tight is clearly better than too loose but I’m wondering do these begin to swivel more freely with use?

Yes
And do not put oil or grease in there

Originally Posted by orthobird

Yes
And do not put oil or grease in there

Correct - no oil

A dry lubricant such as graphite can be used to lesson surface friction within the ball swivel encatchment
Get a lead pencil and rub / draw the graphite over the swivel ball and work it in by manipulating the swivel around in circles , up & down and sideways