Well actually they are. This was taken at the Imperial War Museum Duxford. RAF Duxford as it was known was part of 12 group during the Battle of Britain and was Douglas Barders base during the battle. It was the first RAF Station to recieve the Spitfire into service and later in 1943 based the United States Army Air Force 78th Fighter Group P-47s and P-51s. In fact these hangars were built in 1918 as it was an RAF Station long before world war two.
This looks so much better than the normal HDR look. I like how it doesn't go over the top, and still keeps the 'dark' look that hangars have inside them, but also looks light enough for details. Where was this at?
This looks really good, but you've still got the clipped highlights on the windows. Those are tough. For something like this, you may want to set up the tripod and shoot multiple exposures. Then, you can go back and do the HDR with multiple layers. Alternately, you could try a circular polarizer. Those can work magic for skies, though they will change the reflections on the canopy.