Have an Aresti 40 with a Saito 72 up front.
15% S&W Fuel.

The plane is stock except for the lighter Dave Brown engine mount.

Plane is supposed to be balanced at 3-3/4. I cannot take off with this balance and moved the CG aft about 1/4" from what the plan recommends. This was balanced inverted and measured along the fuse.

Here are my questions:

Is the Aresti supposed to balanced UPRIGHT or INVERTED?????

When flying inverted I need about 1/2 stick down pressure on elevator low rates to keep the nose up. It really wants to come down (inverted towards the ground) in a hurry inverted. Plane has recommended throws all around.

Also, the plane seems to land very hot and takes awhile to bleed off it's speed.

Was thinking about adding tail weight or Downthrust in the engine mount???

Or is there something else I should be looking at? Such as wing incidence etc

Any help would be greatly appreciated.


Thanks.

Checking alignment is never a bad idea. I'd suggest continueing to add some tail weight. With an OS46AX and Dave Brown mount I ended up moving the rudder and elevator servos to the tail to get rid of a lump of lead. Inverted now takes just a little stick pressure, but it still lands hot.

Ninelaps:

Thanks for you reply, but only some of my questions were answered...

Balancing the plane upright or inverted will give you the same answer, however it may be easier to do inverted.

Work with the CG first unless you can determine the thrust line is way off the designers intent.

Look around for trim charts eg. [link=http://www.nsrca.org/trimA.htm]http://www.nsrca.org/trimA.htm[/link] and articles such as some found here[link=http://www.mini-iac.com/DesktopDefault.aspx?tabid=70]http://www.mini-iac.com/DesktopDefault.aspx?tabid=70[/link] for additional help.