Similar to the P-51 drop tank proposal from NASM mentioned in a
previous post, the Salvadoran Air Force has a DC-3 gate guardian at Ilopango International Airport with a skydiver mannequin mounted on a frame cantilevered out from the rear door as if he had just jumped out of the aircraft:

(Source:
Wikimedia Commons)
Previous posts (
1,
2) have mentioned system display boards, but there are still more. The Tennessee Museum of Aviation has examples showing KC-97 hydraulic, landing gear/wing flap and electrical systems:
[Link to Image][Link to Image][Link to Image](Source:
Aviation History Museums)
The Illinois Aviation Museum has a B-52 fuel systems trainer that, instead of using actual cabling or wiring, lights up the path of each set of tubing:
[Link to Video](Source:
Facebook)
The Kansas Aviation Museum has a Beech Bonanza Landing Gear Trainer mounted on the wall that visitors can operate:
[Link to Image](Source:
Google Maps)
The Mitchell Gallery of Flight at Milwaukee Mitchell International Airport has a series of paintings that trace the development of the airport. What makes it special is that they are all depicted from the same perspective, but the airplane in the foreground and the structures on the airport change with each artwork as time progresses:

(Source:
Wikimedia Commons)
The Atterbury-Bakalar Air Museum has a number of excellent displays. What makes theirs stand out is that, while being rather simple, they still work very well. For example, the way they have the designation for their CG-4 cockpit displayed on plexiglass. The display board behind it showing the construction of the CG-4 is equally minimalist, but equally successful:
[Link to Image](Source:
Google Maps)
A section of glider tow cable, suspended from nearly invisible fishing line, spirals down above the cockpit as if it has just been released:
[Link to Image](Source:
Google Maps)
Their visitor briefing room continues the glider theme, with decorations on the side walls and a ghosted image at the front that make it look like guests are sitting in a Waco CG-4:
[Link to Image](Source:
Google Maps)
The museum has also made excellent use of plexiglass, with the enclosure for their R-3350 being a work of art in and of itself. What takes it over and above the standard motorized cutaway engine exhibit is the simple, but easy to use controls for operating it:
[Link to Image](Source:
Google Maps)
Their B-17 display case makes excellent use of height and empty space: not every area of a case has to be packed with models and artifacts. It also illustrates an additional aspect of what makes their vitrines so successful. They are labeled directly on the plexiglass itself, giving a clean look:
[Link to Image](Source:
Google Maps)
More visible in a second picture and similar to the trail of the torpedo in a submarine display case mentioned in a
previous post, the bursts of flak have been creatively recreated with black color cotton balls:
[Link to Image](Source:
Google Maps)
The Frontiers of Flight Museum has a unique canopy cover on their EA-6B. It has eyes printed on the outside in place of the front two windshields, while the remaining windows are delineated by outlines. (The former being similar in concept to the
window covering on the real life "Dusty Crophopper".) So even though visitors cannot see the actual windows underneath, it still gives an idea of what they look like. Fortunately, like the fabric covering display mentioned in a
previous post, thanks to an
article, we can give credit to the person responsible for its creation: Ken "Smo" Smolana:
[Link to Image](Source:
Google Maps)
The Yankee Air Museum unveiled a new
riveting exhibit the other day that allows guests to try the process out themselves. While letting visitors rivet at aviation museums is nothing new, what is so well done about the exhibit is how easy it is to operate. Trying to do it in a safe and repeatable manner is usually awkward at best, but they have managed to rig up a device that holds both the rivet gun and sample piece of metal in place while the visitor operates it:
Attachment:
Riveting Device.png [ 544.05 KiB | Viewed 10781 times ]
(Source:
FOX 2 Detroit)