Renegadenemo wrote:No it wasn't...
Oh yes it was!
I've been accused of getting this one wrong in the past, but I'm more sure of my facts now. Sorry Bill, but XM691 was the first T.1
The Gnat first appeared as a fighter in 1955, and then
came the trainer derivative; 'our' aircraft was the first of 14 pre-production Gnat T.1s, first flying in 1959.
I think the confusion may arise from the fact that this first batch of T.1 prototypes had a shorter nose, though still not as short (or as pointed) as that of the F.1, which also had a considerably shorter canopy and different wings. (Subsequent production T.1s had a longer and thinner nose, which is the more typical 'look' for the type.)
Here's '691 in flight with an F.1, illustrating the different noses-
It's true though that '691 at least had the 701 engine whereas production T.1s had the 101 unit, but nonetheless a T.1 it was, with the same tail fin as all subsequent T.1s. You'll find endless sources online re. '691 being a T.1.
Regarding Gnats with different tail fins, the rudder
of the F.1 fin was wider and shorter than that of the T.1. Have a shufty at Damien Burke's page here-http://www.thunder-and-lightnings.co.uk/gnat/walkaround.php
- and you'll see comparison shots of T.1 and F.1 tail fins.
Re. the seating arrangements, check out the caption on this pic of '691-
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