4D model skill level index (This is not a scientific matrix, it’s more of a feeling.)  

 This is a relative reference for crafting skill on each 4D model. This subjective reference is based on the construction steps needed for the model, the crafting skill needed and the readiness of test fly adjustment. (discussion in "choosing your model") 

paper airplane designs for the DIY project. List from easy (Rating 1) to a more complicated model (rating 10)

3.5D model (the partial 3D models, for relative easy fly adjustment) 

• General Dynamics F-16 Fighter Falcon

Rating 1 (Good for the 1st 4D model)

• Focke-Wulf FW42

Rating 2 

• Avro Canada CF-105 Arrow,
• Convair F-102 Delta Dagger
• Convair F-106 Delta Dart  

• Dassault Mirage 2000,

• Dassault Mirage IIICE,  

Rating 3

• Atlas Cheetah,
• Chengdu J-10A Vigorous Dragon,
• Curtiss P-40 Warhawk (Flying Tigers)
• Dassault Mirage 4000,
• Dassault Mirage IV
• Eurofighter EF-2000 Typhoon(need more skill among the rating group),
• General Dynamics F-111 Aardvark
• General Dynamics F-16XL
• Grumman X-29
• Mikoyan-Gurevich MiG-15
  
• Mikoyan-Gurevich MiG-23 Flogger
  
• IAI KFIR
• SAAB J37 Viggen

Rating 4

• Aermacchi-Lockheed AL-60 Conestoga,
• Aérospatiale/BAC Concorde
• Arado Ar234
  
• Boeing 2707 sst
• Chengdu J-7B
• Convair B-58 Hustler
  
• Dassault-Breguet Super Étendard
  
• Davis  DA-2a
• Douglas AD-5/AI-E Skyraider
  
• Grumman F6F Hellcat
  
• Ilyushin Il-28 Beagle
  
• Junkers F.13
• Lockheed L-133 Starjet
• Lockheed L-2000 sst
• Lockheed YF-22 Stealth fighter aircraft,
• McDonnell-Douglas F-4 Phantom II,
  
• Messerschmitt Me P.1110 Ente,
  
• Mikoyan Gurevich MiG-9 Fargo,
• Mikoyan-Gurevich MiG-21 Fishbed
• Mikoyan Gurevich MiG-31 Foxhound,
• North American T-6 Texan,
  
• PAC/CAC JF-17 Thunder
• Republic P-47 Thunderbolt,
  
• Zenith STOL CH 801,
• SAAB JAS-39 Gripen,
• SAAB  Safari,

Rating 5

• Aero   L-39 Albatros
  
• Beechcraft     Staggerwing
• Bellanca  Miss Veedol
• Blohm & Voss BV155 high-altitude interceptor
  
• Boeing    F-18 EF Super Hornet
• Cessna  172 Skyhawk
• Douglas SBD Dauntless,
• Douglas TBD Devastator,
• Focke-Wulf   Fw 190,
• Lockheed  SR-71 Blackbird
• Messerschmitt Bf 109
• Messerschmitt Me 262 Schwalbe
• Mikoyan MiG-29 Fulcrum,
• Mikoyan Gurevich MiG 21i (MiG 21-11, A-144 analog)
• Mitsubishi A6M Zero,
• Nakajima B5N2 Kate,
• North American  P-51B Mustang,
• Piper   J-3 Cub/L-4 Grasshopper,
  
• Sukhoi   Su-25 Frogfoot,
  
• Supermarine   Spitfire
• Tupolev Tu-144sst
• Vought F4U Corsair
  

Rating 6

• Aichi D3A Val,
• Beechcraft Bonanza 35
• Cessna  Bobcat
• Ford Tri-Motor
• Gloster Gladiator Mk I
• Lockheed Martin F-35B Lightning II
  
• McDonnell-Douglas F-15 Eagle,
  
• Mitsubishi A6M Zero (version 2.0)
  
• ​North American P-51D Mustang,
• Northrop F-5F Tigger II
  
• Stearman (Boeing)Model 75
  
• Sukhoi SU-27 Flanker-a,
  
• Waco CG-4A Hadrian,

Rating 7

• Boeing B-17 Flying Fortress
  
• Boeing B-29 Superfortress.
  
• Curtiss P-1 Hawk
• Grumman F4F Wildcat,
• Lockheed Electra 10 (NR160210, Amelia Earhart's last flight)
• McDonnell-Douglas AV-8B Harrier II
  
• Sukhoi SU-27 Flanker (Version 2.0),
  
• The Spirit of St. Louis (Ryan NY-P)
  

Rating 8

• Boeing 2707-200 sst
• Mikoyan Gurevich MiG-25 Foxbat-B,
• Vought F-8E Crusader
  

Rating 9

• Beechcraft    Starship,
• Boeing   YL-15 Scout,
  
• General Dynamics F-16 Falcon,
• Fairchild Republic   A-10 Thunderbolt II
  
• Fokker Dr.I (Red Baron),
• Mikoyan Gurevich     MiG-8 Outcka,
  
• Rockwell B-1B Lancer,
  
• Vought F7U Cutlass

Rating 10

• Cessna Skymaster
  
• General Atomics MQ-1B Predator,

4D paper airplane:

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