Pavla 1/72 Vultee BT-13
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Back view of the engine showing the plastic ring I added.  The BT cowl had a rather large radius which Pavla failed to capture, and I didn't fix that. See the picture of L285 in flight to see that.
  Also, the cowl area aft of the cowl and forward of the section in front of the  windscreen tapered to a smaller radius  at the dishpan area than the kit does, the BT looks kind of clumsy at that area
in side view and I think it is that way because the original design was for a geared R-1340 set farther back
than the lighter R-985 or Wright R-975 that different versions of the Valiant used.
There was no provision made for attaching the cowl or engine to the  firewall that I could see.  I attached the engine to the cowl so the propeller had the correct clearance,
and then found a cylindrical  scrap of plastic in the spares bin that I attached to the back of the engine.  I ground that down until I had the proper cleance between the aft edge of the cowl and the
dishpan
.  The  BT had a fairly big gap there and of course no cowl flaps.

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