On Friday, March 18, 2016 at 5:27:44 AM UTC-7, DaleKramer wrote:
On Thursday, March 17, 2016 at 10:36:06 PM UTC-4, 2G wrote:
Your "design" looks to have a very high disk loading. What CAD analysis (if any) have you done of this design, and what CAD tools did you use?

Tom

I assume you are asking about rotor disk loading in hover mode which is about 18 lbs.ft^2

And my hover lift efficiency is about 5 hp/lb

I don't see either of those being 'high' unless you start comparing the design out of category. I believe the nearest category for hovering should be multirotor. In the multirotor category I would expect it to 'above normal' because I use the same props/rotors to achieve static thrust for hover and for traction thrust at high airspeeds during cruise, so compromises are made for both flight conditions.

I am a little confused in that I traditionally think of CAD programs as simply the program used to draw a design on a computer. From the question I think you might mean CAE or CFD or simply analysis tools like XFLR5.

In any case I used XFLR5 for aerodynamics analysis, Javaprop for prop analysis and I have not done any CFD yet.

CAD, or computer-aided design, covers the gamut of software tools, not just basic drafting. I was thinking of aeronautical engineering tools, however. You obviously have available drafting tools.

Your disk loading is quite high, between a Super Stallion and an Osprey. This precludes an autorotate capability. Having 5 motors operating to sustain a hover represents a corresponding high failure probability with no recovery.

How would you land conventionally with propellers on the wing tips? Would they fold back?

I think it is incumbent upon you to disclose to potential investors that you are not an engineer (unless you have an aeronautical engineer on your team, of course).