I have a question for anyone. I have assembled a couple of planes but always followed the instruction from Hangar 9 and did not add any right thrust. I am building a plane now that is going to need 2 degrees right and down.

Question: What are some good solid ways to mount the motor to get the 2 degrees of right thrust and 2 degrees down. I have heard washers and pieces of wood. I would think the washers might leave an impression in the wood because the pressure from tightening the bolts is localized.

Move the engine mounting to left and add more material to make the engine offset and extra material above the upper part of the engine mounts for downthrust,, see this the link how to calculate the engine offset: http://www.airfieldmodels.com/inform...ine_offset.htm

Before you start modifying the engine mount, make sure that the thrust line are "NOT" built into the firewall. If they are, you just center your mount and attach it. Most of the current kits will have the thrust built into the firewall. Even built from plans planes will have the thrust line buitl in. Just check this out closely before making that adjustments with the mount. You could easilly turn a 2 Degree thrust into a four degree one

Don

Ernst makes tapered wedges to be placed behind the motor mount. See http://www3.towerhobbies.com/cgi-bin...SM&C=GMH&V=ERN

I have glued(CA or 5-min epoxy) very thin 3/8" wide hard wood strips to the top and left edge of the back of the motor mount. After the glue is set, sand the wood strips to a thickness that will give you the desired offset. Now your load is more evenly distributed along the engine mount/bulkhead contact area.