KR Super2

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Design Analysis

Please Note: The Super2 is under construction so has not been flight tested. Please read the Disclaimer Page for more info.

The KR-Super2 is a Corvair powered, all composite, two seat experimental aircraft modeled after the Rand Robinson KR2S. The KR was the first experimental aircraft to utilize composite construction, and though the design is now quite dated, this little airplane enjoys a loyal following. Due to the experimental aircraft community’s dedication, and specifically the KR builder’s network, the KR has continued to evolve. The KR-Super2 embodies my attempt to capture the latest thoughts, ideas, experience, and technology to produce a modern version of this classic aircraft. One that I like to think Ken Rand would have designed if he were still around today. I would like to thank all of the builder’s and pilots who have designed, built, and flight tested the majority of the ideas I am using here. You will see many of their names spread throughout this web site, and you will be able to trace the ancestry of the KR-Super2 to their efforts.

The Manual

The Super2 design will be presented in the form of a construction manual. I am a planner by nature and I like to understand each task in detail before I begin. The idea is to create a set of plans, then build to them. Speaking of plans, I feel everyone interested in experimental aviation should own a set of Rand-Robinson KR plans. If not to actually build a KR, then to at least own a piece of history. I have mine; do you have yours?

The KR-Super2 is slightly larger than the original KR2S, uses a larger engine, has a roomier cabin, is longer and has more wing area. Its useable payload is larger, its top end speed is comparable but the airplane is not as fuel-efficient.

Specifications

Design Parameter
             Length
             Wing Span
             Total Wing Area
             Empty Weight 
             Gross Weight
             Useful load
             Fuel Cap 
             Stall speed
             Maximum speed
             Cruise speed
             Range      
             Engine     
             Power     
             Power loading
             Wing loading
             Fuel consumption
             Seating             
             Gear                
           Cabin Width

KR-2S
16'
23'
82 sq. ft.  
620         
980 lbs.   
360         
16 gal      
52 mph    
155 mph  
140 mph  
500 miles
VW 2180
70 HP
14lbs/hp  
12 lbs/sq ft
4.5 gph    
2 across   
Conventional    
38"

KR-Super2
19’          
24’
93 sq ft
750
1200
450
26 gal
48 mph
170 mph
140 mph
600 miles
Corvair 2700
100 HP
12 lbs/hp
12.5 lbs/sq ft
5.5 gph
2 across
Tri-Gear
43”