What 's your opinion of this theory.

[Himat]

Thanks HITC!

 

Another search and I found it; it is this I think, Aircraft with paired aerofoils, US 4856736.

 

http://www.google.com/patents/US4856736?dq=JOHN+MACDONALD+uav&hl=no&sa=X&ei=XTkDUuu1Os7E4gSkhICgCg&ved=0CDUQ6AEwAA

 

The follow up patents I guess are these:

 

US6626398, Mission Technologies, Inc. Unmanned biplane for airborne reconnaissance and surveillance having staggered and gapped wings.

 

US7014141 12, Mission Technologies, Inc. Unmanned airborne reconnaissance system.

 

US7210654 23, Mission Technologies, Inc. Unmanned airborne reconnaissance system

 

Sorry for not being very precise, I was referring to a Google search on the Outrider UAV.

 

Thanks for the update on Synergy too, I do hope that they get in the air and can provide test data.

 

 

[Head in the clouds]

Thanks HITC!Another search and I found it; it is this I think, Aircraft with paired aerofoils, US 4856736.

http://www.google.com/patents/US4856736?dq=JOHN+MACDONALD+uav&hl=no&sa=X&ei=XTkDUuu1Os7E4gSkhICgCg&ved=0CDUQ6AEwAA

 

The follow up patents I guess are these:

 

US6626398, Mission Technologies, Inc. Unmanned biplane for airborne reconnaissance and surveillance having staggered and gapped wings.

 

US7014141 12, Mission Technologies, Inc. Unmanned airborne reconnaissance system.

 

US7210654 23, Mission Technologies, Inc. Unmanned airborne reconnaissance system

 

Sorry for not being very precise, I was referring to a Google search on the Outrider UAV.

 

Thanks for the update on Synergy too, I do hope that they get in the air and can provide test data.

Excellent research Himat. I'm bogged down on a big work project so as it turned out I wouldn't have had time to do the search for a day or two, but now I'll enjoy having a sift through these later. There's definitely so much untapped potential for this configuration and it provides such a good structural layout on strength to weight considerations, and big volume for a compact exterior size. I think the single biggest problem is making it look nice enough to attract people to wanting to own it, that may be all that's held the Sunny Boxwing back.

 

 

[Himat]

Most part of the research is Google and how to use it. The difficult part was to find the original patent, then with Google Patents it’s just searching previous art and referring patents or academic citations.

 

To get a design that look good I think partly is down to size. A manned airplane of this configuration must have a certain size to get the proportions right. A small single seat would probably end looking ungainly. With a large two seat or a four seat airplane the proportions would probably work out much better. I think John Mac Donald, macboffin, mention both a single seat and a seven seat aircraft of this configuration have been built, but I have not been able to find any more references to this.

 

About the design being structural efficient with a compact size and large load volume I do agree. From some of the pictures it looks like the design gives STOOL capabilities. With a not to large wing area the cruise speed and efficiency might be reasonable too. Maybe this is the configuration for my next unorthodox model airplane?

 

 

[Downunder]

Hello Himat. Did you know Pe Reivers from the Netherlands?

 

His passing is a sad loss to the RC community worldwide.