the a 10 thunderbolt ii by andy ko february 11 2000
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The A-10 Thunderbolt II by Andy Ko February 11, 2000. http://www.geocities.com/CapeCanaveral/Hall/5777/A-10.html. History. Lessons learned from Korea and Vietnam War Need for close air support Model the A-1 Skyraider AX Program June 1966 - USAF send RFP to 21 companies

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the a 10 thunderbolt ii by andy ko february 11 2000

The A-10 Thunderbolt IIby Andy KoFebruary 11, 2000

http://www.geocities.com/CapeCanaveral/Hall/5777/A-10.html

history
History
  • Lessons learned from Korea and Vietnam War
    • Need for close air support
    • Model the A-1 Skyraider
  • AX Program
    • June 1966 -
      • USAF send RFP to 21 companies
      • Parallel Paid Study Contract
    • 1970 - Requirements finalized, bidding starts
      • Northtrop & Fairchild Republic selected for fly-off
    • 1972 - Fly-off begins
    • Jan 1973 - Fairchild’s A-10 announced to be the winner

http://skyraider.org/skyassn/otherpics/mignard/602sos/602sos.htm

requirements
Requirements
  • Speed: 350-400 kts.
  • 250 nm. operational radius with:
    • 9500 lbs external stores and internal ammunition
  • Field Length = 4000 ft. at Max TOGW
  • Simplicity
    • Only proven/off-the-shelf technology
    • Exception: High BPR turbofans
  • Survivability
    • Redundancy
  • Cheap
    • $3.02 Million (F-16 ,F-18, Harrier)
      • F-16, $9.5 - $12.8 Million
      • F-18, $24 Million
      • AV-8B, $23.7 Million

http://www.af.mil/news/factsheets/A_10_OA_10_Thunderbolt_II.html

slide4

Dimensions

Wing span 57ft 6in

Length overall 53ft 4in

Height overall 14ft 8in

Weights

Operating empty 24959lbs

Basic design weight 30384lbs

Internal fuel 10700lbs

Max external load 16000lbs

Take-off weights

Maximum 50000lbs

CAS mission 47094lbs

Anti-armour mission 42071lbs

Ferry 49774lbs

Never-exceed speed 450kts

Max level speed at sea level, clean 381kts

Combat speed at 5000ft with six 380kts

Mk82 bombs

Cruising speed at sea level 300kts

Sea-level rate of climb at design weight 6000ft/min

Service ceiling 45000ft

Anti-armour configuration, 30min combat, 252nm

40nm penetration and exit

CAS configuration, 1.88hr single-engine 250nm

loiter at 5000ft, 10min combat

Ferry range, 50kt headwinds, 2240nm

20 min reserve

Performance

Combat radii

Graphics from Dana Bell, “A-10 Warthog in detail & Scale”,

configuration
Configuration
  • Cantilever Low wing
  • Airfoils
    • NACA 6716 on centerline, NACA 6713 at tip
    • Provides low wing loading (92.14 lb/sq ft)
  • Wide Chords
    • Mean wing chord = 8ft 11.32in
  • 2 segment, 3 position Fowler flaps
    • No leading edge devices
  • Wide span ailerons
    • Dual upper and lower surfaces for airbrakes
    • SAS (Stability Augmentation System)
  • H-Tail
    • No deep stall
    • Spin resistance

Graphics from Dana Bell, “A-10 Warthog in detail & Scale”,

configuration cont d
Configuration (Cont’d)
  • Little Sweep
    • Mach number no greater than 0.68
  • Aspect Ratio = 6.54
  • Taper ratio = 0.65
  • Engines
    • TF34-GE-100 (6.2 BPR)
    • 9065 lbs. Static thrust
    • Turbofan vs. Turboprop vs. Turbojet?
    • Placement
      • Nozzles are canted 9º upward
  • Landing Gear
    • Forward retracting
    • Exposed wheels when retracted

http://www.a-10.org/photos/photos5.html

http://www.a-10.org/photos/photos6.html

improvements fixes
Improvements / Fixes
  • Stall problem
    • Initially a fixed slat was installed, later changed to a movable slat
    • Stall strip added to the leading edge
    • Wing root modified with a fillet
    • Forward projecting strakes
  • Drag improvements
    • Increased wing-span by 30 in.
    • Hoerner wingtips
      • Induced drag
      • Aileron effectiveness
    • Canopy and windscreen shapes refined
    • Pylons shortened and streamlined
    • Reduced landing gear pod cross section

http://www.a-10.org/photos/photos7.html

http://www.a-10.org/photos/photos.html

comparison with other attack aircraft
Comparison with other Attack Aircraft

* With combat load

** With external fuel tanks (tanks retained)

survivability and lethality
Survivability and Lethality
  • Redundant control system
    • 2 hydraulic controls (separated) and 1 cable manual reversion
    • H-tail provides 2 separated control surfaces
  • Redundant structure
  • Titanium bathtub for pilot
    • 1.5 in thick bulletproof canopy
  • Weapon loads
    • GAU-8/A Avenger 30mm seven barrel gun
      • 1350 rounds at 2100 or 4200 rounds/min
    • 11 store pylons with max external load of 16000 lbs

Smithsonian Air & Space Magazine,

March 1999, pg 27