Elevator set-up.
 

I have not seen this done before but that does not mean it has been which is why I am seeking your advice. I want to power my elevator with a single high power digital servo. I am thinking of using two graphite control rods back to the split elevator halves but connected at the same link on the aluminum servo wheel. Something like 4-40 HD ball links stacked one on top of each other with the 4-40 bolt going through the two connectors tapped into the aluminum rod. The tubes will be the same length.

What do you think?

RE: Elevator set-up.
 

Dave Brown Products makes what you need. It is made out of a fiberglass arrow shaft. You use one rod at the servo end and split at the control horn end. The shaft comes with all the fittings you need. Later David

RE: Elevator set-up.
 

Thanks Dave. Are you sure it is Dave Brown? Their web site has nothing on this nor does Tower show this when you do a search for Dave Brown products.

RE: Elevator set-up.
 

I will look at the package tonight. I have always bought them from a hobby shop so I dont know about Tower.
Later David

RE: Elevator set-up.
 

I've used this method, but instead of stacking the balls on top of the servo arm I put one on top, and one below the arm. That eliminated any tendency for the balls to twist the arm. The setup outlived the airframe, never gave me a problem. It was in a 1.20 size, not a real giant.

D

RE: Elevator set-up.
 

Ah top and bottom, that might works even better. Thanks for the reply I think I will give this a go. This will only be on a scratch design for my YS91

RE: Elevator set-up.
 

Have you considered a pull pull on the elevator. I just did mt first on an DP edge and i may not ever run rods on my elevator again. Im very impressed w/ it.

scott

RE: Elevator set-up.
 

I have not, only rudder. I gave it a thought but 4 cables seem a bit much just for the elevator and I am not sure I will like the looks. Pull Pull looks real on the rudder but to me not on the elevator.

RE: Elevator set-up.
 

Try taking another look, av8or. That's my elevator servo on the left. The pull-pull runs four lines, but the look is pretty clean

http://www.devino.org/mark/airplanep...ageservos1.jpg

It was a little hard to calculate the wire exits on the fuselage, but that was it. It's a super setup. This pic is from my DP Edge

RE: Elevator set-up.
 

Thanks for the image Cheech and a nice simple setup. I know what you mean about the exists. This design in 3D CAD so I could lay it out there and get exact dimensions. Did you line the exists with anything?

RE: Elevator set-up.
 

I measured the height at the servo arm, transferred that measurement to the covering on the outside of the plane. I then ran a string from the hole on the hole on the control horn to the mark. That gave me the line on the fuselage.

I then just took a swag at exactly where the cable would enter the fuselage and made a tiny slit. I got lucky and was right on the money.