Advice for motor mount
 

I am in the process of designing a motor mount for my Integral. It's going to be a custom, composite mount machined by a friend in the hobby. The motor is a Plettenberg Advance. What I want is the ability to adjust the thrust line; I would like the 'stock' thrust line at first, and the ability to shift the motor to a second predetermined location. The reason - I have a set of foam cores that I am going to build. I want to fly the plane stock at first, and have 1/2 degree of positive wing angle in the new wings. Based on advice from people I trust, I would then end up wanting to reduce down thrust and increase right thrust.

Any thoughts/advice/pictures are greatly appreciated!

RE: Advice for motor mount
 

I've been using a two piece mount with 4 adjustment tabs that mate together. The outer ring is glued to the fuselage and the inner piece is bolted to the motor. The assembly is bolted together with 4-40 SH machine screws and blind nuts and installed and then when adjustments are needed I use shims on the tabs as needed to adjust up and down and left right thrust.
I've used it in the last 3 2m planes I've built including the Integral I'm flying now.

Attached is a very rough sketch.

RE: Advice for motor mount
 

Here's how my Abbra is done. Plate is 3/32" G-10. Easy as pie to adjust thrust left/right & up/down

RE: Advice for motor mount
 

Thanks for the replies. The challenge in the Integral is the diameter of the nose vs the diameter of the motor. There is not much room for hardware outside the motor diameter. I was thinking of somehow shimming between the motor and the inside part of the mount, such that the motor mount bolts would go through the shim, rather than needing add'l hardware? Hope that makes sense.

I guess a quick and dirty way is just use shim washers between the mount and the motor. I'd like to find something more robust/creative/permanent, and also need to consider the rear mount.

RE: Advice for motor mount
 

Take a look at this thread. It shows the Advance being mounted in a BJ Craft Episode

http://www.rcuniverse.com/forum/m_10...5/key_/tm.htm#

Post #122 shows some pcs.

RE: Advice for motor mount
 

Thanks, that's exactly what I needed.