DavidUK

Firstly, I don’t understand the difference between X+number, and X+letter+number:
— examples of the former being the Bell X-1 or the Boeing X-37, all of which appear to be Xperimental and,
— examples of the latter being the XB-52 or XB-70 which appear to be prototypes.
Then with the prototypes, what’s the difference between say the XB-52 and XB-70, and Y-planes, e.g. Boeing YC-14 and McDonnell Douglas YC-15, both of which I believe were predecessors of the Boeing C-17?
Is there such a thing as Z planes?
Do you know of any wiki-type articles which might describe this?
Thanks for any advice.

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David Valencia, Bristol
Faves: SR-71, Concorde, Tu-160, H.P.Victor, 747, anything Soviet, agricultural, experimental, weird/ugly eg Rutan, Belfegor, Airtruk
WishList: G-BSST, Aerion AS2, Ankair, Any Rutan, Avro Arrow, Boom Overture, Bristol Brabazon & 188, BN.Defender, Boeing 2707, Fairey Delta 2, HAL Tejas, Irkut MC-21, MiG1.44, McDonnellDoug YC-15, Myasishchev 17/55, NAL Saras, Pacific Sun Twin Otter, PZL M15 Belfegor, Sukhoi T-4, Transavia Airtruk

Mystère

You'll find answers here

https://en.wikipedia.org/wiki/United...le_designation

And yes, there is a "Z" prefix.

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"Open your eyes, because the revolution won't be televised"

Still looking for following 1/400 models :
AIR FRANCE Concorde F-BVFC & F-BVFD
AIR FRANCE 747 delivery colors F-BPVH

DavidUK

Thanks, that's exactly what I was looking for, and very interesting.
And complicated!
Anyone know if there's something similar for the UK?

__________________
David Valencia, Bristol
Faves: SR-71, Concorde, Tu-160, H.P.Victor, 747, anything Soviet, agricultural, experimental, weird/ugly eg Rutan, Belfegor, Airtruk
WishList: G-BSST, Aerion AS2, Ankair, Any Rutan, Avro Arrow, Boom Overture, Bristol Brabazon & 188, BN.Defender, Boeing 2707, Fairey Delta 2, HAL Tejas, Irkut MC-21, MiG1.44, McDonnellDoug YC-15, Myasishchev 17/55, NAL Saras, Pacific Sun Twin Otter, PZL M15 Belfegor, Sukhoi T-4, Transavia Airtruk