I have drawn a De Havilland Beaver plan with a 90" wingspan for a 90 or 120 4-stroke engine. I don't have time to build it right now, but I'm looking for someone who wants a project. If you are interested, let me know. I can send you a reduced version of the plan for you to look over at no cost to you. Plan is 4 sheets. This is not a project for an RC flyer only, but an for RC builder and flyer. I would want $30 for the fullsize plan. Not intended for a gas engine, but could be modified by the builder.