Yak-1000: A blessing in disguise.

Yak-1000: A blessing in disguise.

The product of Yakolev’s quest to built a supersonic tactical fighter to compete against Mikoyan Bureau.The 1000 was initially to be equiped with a Lyul’ka AL-5 axial jet engine,but problems with that powerplant and the unability of others of the same power prompted Yakolev to built the Yak-1000 as a technology demostrator of the “rhomboid” wing equiped with a klimov RD-500 Derwent.All came to nothing because during taxi trials the combination of airframe, crosswind and bicycle undercarriage showed such a nasty behaviour that the project was cancelled and the protoype remained unflown.
Later tests also found that those wings posed serious in flight stability problems with solutions that were out of reach at that stage.

Warner / Piper Twin Cub: Siamese, but not quite twins.

Warner / Piper Twin Cub: Siamese, but not quite twins.

If marrying two aircraft to make a twin-engined aircraft is not enough,Harold Warner chose two different variants of the world famous Cub to spice things a bit more: one of them was the classic 1937 J-3 modified with an enclosed cowling and a 85hp Continental engine to match the characteristics of the other,a refined 1947 PA-11. To place the two fuselage so close he used propeller-overlap design again as in his previous Twin-Pacer.This outrageously cool experiments were short-lived,a pity.