Boeing KC-135 model with winglets found on eBay.
Source:
http://www.ebay.com/itm/NASA-USAF-AIR-FORCE-KC-135-WINGLETS-MODEL-KC135-/251161721311?pt=LH_DefaultDomain_0&hash=item3a7a67b9df
Seller's description:
Source:
http://www.ebay.com/itm/NASA-USAF-AIR-FORCE-KC-135-WINGLETS-MODEL-KC135-/251161721311?pt=LH_DefaultDomain_0&hash=item3a7a67b9df
Seller's description:
Up for auction is what I believe to be a model of a KC-135 cargo/tanker used by NASA/USAF to test their "WINGLETS" program. I don't know my aircaft, so you determine what it actually is. On the model, one 'winglet' is broken off the right-hand wing as you can see, but it would be very easy to reattach using some suitable adhesive. This belonged to my father who was a scientist at Langley Research Center and working on this project.