Originally posted by FrankO47
Mike,
Just happened on this thread, I'm just completing the build of my Laser 3D and will probably remove the wing tips based on the comments.
Beware that engine mount / firewall. On my first in-plane test of my new OS52FS, the firewall detached on one side! I have reinforced the engine mount to the firewall with triangular fillet throughout but I'm still scared it will disintegrate in the air.
Do you have a view on the best way to connect the tailwheel to the rudder so as to ensure that both don't get ripped off in a heavy landing?
Also I am not happy with the amount of 'throw' on the rudder using the suggested closed loop arrangement, I'm tempted to replace with a single pushrod?
Regards
Frank
The Pull pull is very good for the rudder, I used that method on all my pattern planes and on my hovering cobra, and I did get some crazy throw (60 degree), the consideration thing are;
-To have double arm on the servo that is wide enough to give high throw, but for 3D I used large large servo wheel or the dubro Xlarge double servo arm (high strength).
-For the surface I play with the distance a bit since I don't really care if the non pulling end up a bit loose compare to the pulling cable, it won't affect a thing....as long as it's not loose..
-The pulling cable will be tighter compare to the other cable, that is not a problem for this application, on pattern plane we don't need that much throw....so we arrange thing so both cable have similar tension and on the IMAC bird the fuselage is much wider then our's....
-To achieve same tension throughout, you need to have the same angle at the serve compare to the rudder horn, and the exact same total distance between the connection point.
Hope this help Daniel D.