I have 2 qusrtions:
2) Is there are any early aircrafts in 15mm scale for VSF. Something like Wright plane, Blakan Wars planes and Early WW1 planes...
With a little bit of luck, you'll might find a 1903 Wright Flyer in 1/100 done by Dahlmann. They pop up on E(vil)bay Germany occasionally for a reasonable price (around € 7,00). I would steer clear form the original ones made by Faller, as these fetch higher prices because of the kit-collectors.
Dahlmann bought some of the old 1950/1960 Faller moulds. This means that these kits are rather on the crude side of detail.
IIRC there are even generously moulded-on eyes for the rigging
. And there might be some ejector-pin marks as well.
And if you like kit-bashing, there's no way in stopping you converting Revells 1/72 D.H.2 for your VSF needs. Should make for a nice large bomber methinks...
Glencoe used to sell a twin-pack - again a Wright Flyer (1/109), together with The Spirit of St. Louis (1/115). But I am not sure about the availability of this kit.
There's even a diecast model of the Wright Flyer:
http://www.skygeek.com/11112.htmlThey state that it has a wingspan of 5", which should be o.k. for 15mm VSF.
Hope that helps. (I'm searching for this kind of kits as well - for my 15mm Quar...)