Ok... My quickie 500 weighs 3.9 pounds and has a o.s. .46ax. That is a power loading of about 136. I think I can build the smaller one right at 2 pounds. Using a .15 or similar will net around the same power loading.

My plan is to build the frame, making it wide enough for the battery which seems to be the biggest item. After I know how much the frame weighs I can adjust the mAh of the battery to get to 2 pounds.

My next question is if I just scale down the plans, can I skip half the wing ribs to save weight. I can't see needing something like 22 ribs in a 35 inch wing.

Also should I have the plans printed at 70% original so I can copy the stab/rudder design or could I do some math and get it close.