NA F-86 vs Saab J29 -which why?

Discussion in 'Post-War' started by delcyros, Mar 22, 2007.

  1. delcyros

    delcyros Well-Known Member

    Joined:
    Mar 2, 2005
    Messages:
    2,037
    Likes Received:
    27
    Trophy Points:
    48
    Location:
    Berlin (Kreuzberg)
    A classic early jet vs jet dogfight scenario.
    Just wondering recently which jet was the better performer in the air to air role.
    both are classic first generation jet fighters with single engined, fuselage mounted jet engine and swept back wings.


    Saab J 29 -Tunnan A("Barrel"):

    date: late 1948

    span: 11.0m
    length: 10.23m
    height: 3.75m
    wingarea: 24.15 m^2
    wingsweep: 25 degrees

    empty weight: 4580 Kg
    normal weight: 6880 Kg
    max. take off: 7530 Kg

    wingload: 284.88 kg/m^2
    powerload: 93.99 kp/m^2
    spanload: 625.45 kg/m
    thrust-weight-relation: 0.3299

    critical Mach speed: 0.86*
    range: 525 mls

    thrust: 2270 Kp
    initial climb rate: 28,5 m/s (5660 fps)
    time to 10000m: 438 sec.
    max. altitude: 13700m

    armament: 4 x 20 mm, 180 rpg each
    12 x 75mm air to air rockets (unguided)

    On 6 May 6 1954, a J-29B set a world record on a closed 500 km circuit of 977 km/h (606.8 mp/h) previously held by an F-86. Two Saab J 29C (reconnaissance variant) additionally set an international speed record of 900.6 Kph (559.4 mph) over a 1,000 km (621 mile) closed-circuit course in 1955.

    -------------------------------------------------
    North American F-86A Sabre

    date: late 1948

    span: 11.31m
    length: 11.43m
    height: 4.5m
    wingarea: 29.1m^2
    wingsweep: 35 degrees

    empty weight: 4780 Kg
    normal weight: 6300 Kg
    max. take off weight: 7360 Kg

    wingload: 216.5Kg/m^2
    powerload: 75.6 kp/m^2
    spanload: 583 kg/m
    thrust-weight-relation: 0.3333

    critical Mach speed: 0.89*
    range: 485 mls.

    thrust: 2200 Kp
    initial climb rate: 20 m/s (4000 fpm)
    time to 10000m: un
    max. altitude: 14630m

    armement: 6 x 0.50 cal. MK3

    F-86 A Sabre sets world aircraft speed record of 1080 kph (670.8 mp/h) on sept. 15th 1948
    ------------------

    I can see both planes about equal with some edge to the F-86 Sabre. Which one whould You choose and why?

    -------------------
    sources for pics: above (F-86) from Wikipedia, pic open to public domain, picture below from http://www.saabgroup.com/NR/rdonlyres/0BDF7C25-04BD-49D3-99AF-77EF2AE5D5DB/0/1948_J29.jpg
     

    Attached Files:

  2. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
    Staff Member Moderator

    Joined:
    Apr 9, 2005
    Messages:
    23,198
    Likes Received:
    784
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    Aircraft Maintenance Manager/ Flight Instructor
    Location:
    Colorado, USA
    When compared to early Sabres, I'd give it to the J-29. Later models of the Sabre were superior. The J-29 actually came a year later than the F-86. Don't forget the Navy versions as well as the Avon Sabres.


    General characteristics (FJ-4)


    General characteristics
    Crew: 1
    Length: 36 ft 4 in (11.1 m)
    Wingspan: 39 ft 1 in (11.9 m)
    Height: 13 ft 11 in (4.2 m)
    Wing area: 338.66 ft² (31.46 m²)
    Empty weight: 13,210 lb (5,992 kg)
    Loaded weight: 20,130 lb (9,130 kg)
    Max takeoff weight: 23,700 lb (10,750 kg)
    Powerplant: 1× Wright J65-W-16A turbojet, 7,700 lbf (34 kN)
    Performance
    Maximum speed: 680 mph (1,090 km/h) at 35,000 ft (10,670 m)
    Range: 2,020 mi (3,250 km) with 2× 200-gallon (760 L) drop tanks and 2× AIM-9 missiles
    Service ceiling: 46,800 ft (14,300 m)
    Rate of climb: 7,660 ft/min (38.9 m/s)
    Wing loading: 69.9 lb/ft² (341.7 kg/m²)
    Thrust/weight: .325
    Armament
    Guns: 4× 20 mm (0.787 in) cannon
    Missiles: 4× AIM-9 Sidewinder missiles
    Bombs: 3,000 lb (1,400 kg) of underwing ordnance, including missiles
     
  3. DerAdlerIstGelandet

    DerAdlerIstGelandet Der Crew Chief
    Staff Member Moderator

    Joined:
    Nov 8, 2004
    Messages:
    41,767
    Likes Received:
    684
    Trophy Points:
    113
    Occupation:
    A&P - Aircraft Technician
    Location:
    USA/Germany
    I dont eneogh about the J-29 to make an educated comparison of the two. One thing for sure thoug is taht the J-29 reminde me of the Messerschmitt P.1101.
     
  4. delcyros

    delcyros Well-Known Member

    Joined:
    Mar 2, 2005
    Messages:
    2,037
    Likes Received:
    27
    Trophy Points:
    48
    Location:
    Berlin (Kreuzberg)
    I agree Flyboy, the later Sabre´s are superior, hands down. The earlier versions both are very competetive planes. Thanks also for Your contribution of the FJ-4 datas (This plane really is my personal favourite 1st gen. jet).

    From what can be read it seems that a SAAB official got hands on german aerodynamic papers considering swept back wings and area rule´s via some inofficial channels in switzerland in late 1947 (when the design process was already finished for a straight wing Saab J 29) and quickly transferred the paper (which the swiss earlier passed to US officials) to Sweden.
    Still they implemented the swept back wing idea with leading edge slots (implying that part of the papers origin from Messerschmidt AG) rapidly into the design. A very quick work for such a small country! However, the Tunnan are genuine swedish design work (except for the licence build DH Ghost jet engine), respectively the F-86 is a genuine US design.

    What surprised me is that so many different airplanes evolved from the same problem with a similar appearence. Perhaps we should open the competition to other "similar looking jets": Dassoult Mystere I, the Mig-15 and the La-15?

    compare to J-29:
    The SAAB 29 Tunnan
     
  5. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
    Staff Member Moderator

    Joined:
    Apr 9, 2005
    Messages:
    23,198
    Likes Received:
    784
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    Aircraft Maintenance Manager/ Flight Instructor
    Location:
    Colorado, USA
    Don't forget the missiles! The J-29 used Sidewinders as well....
     
  6. pbfoot

    pbfoot Active Member

    Joined:
    Apr 14, 2005
    Messages:
    7,636
    Likes Received:
    4
    Trophy Points:
    38
    Location:
    niagara falls
    Well once again I'll go for the Canadair MK6 as the F86 jock I talked to yesterday said about RCAF Sabres in Europe
    "we made more money our dollar was worth more we went higher and faster and were more handsome" :lol:
     
  7. Gnomey

    Gnomey World Travelling Doctor
    Staff Member Moderator

    Joined:
    Nov 28, 2004
    Messages:
    41,720
    Likes Received:
    517
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    Doctor
    Location:
    Portsmouth / Royal Deeside, UK
    Home Page:
    I agree with Joe, the early F-86's weren't as good as the J-29 (although still close). However the later versions and the Avon powered ones were superior.
     
  8. delcyros

    delcyros Well-Known Member

    Joined:
    Mar 2, 2005
    Messages:
    2,037
    Likes Received:
    27
    Trophy Points:
    48
    Location:
    Berlin (Kreuzberg)
    Hi Flyboy,

    did the FJ-4 really had a top speed in level flight of 680 mp/h at 35.000ft?
    Using
    Standard Atmosphere Calculator
    for calculation of Mach speed this would imply a level speed of Mach 1.01 at this altitude! All I could find was that the critical Mach speed of the FJ-4 (as designed) was 0.95, the plane was subsonic and not supersonic.
     
  9. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
    Staff Member Moderator

    Joined:
    Apr 9, 2005
    Messages:
    23,198
    Likes Received:
    784
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    Aircraft Maintenance Manager/ Flight Instructor
    Location:
    Colorado, USA
    From everything I gathered it seems about right. That calculator you showed is measuring airspeed at standard no wind conditions, sure the aircraft is going to exceed Mach 1. Here's something else to look at - the U-2 flies at 60,000 feet - it had about a 10 knot window where it could start exceeding the speed of sound or stall - all at about 400 mph indicated airspeed. Certainly the U-2 is not a supersonic aircraft.
     
  10. delcyros

    delcyros Well-Known Member

    Joined:
    Mar 2, 2005
    Messages:
    2,037
    Likes Received:
    27
    Trophy Points:
    48
    Location:
    Berlin (Kreuzberg)
    Sure the Sabre could go supersonic. But all accounts make clear that it had to use a near vertical dive to make full use of mother earths gravety to slip through. Exceeding Mach 1 in level flight seems a bit questionable for the FJ-4. I admit I am not sure about this.

    best regards
     
  11. Lucky13

    Lucky13 Forum Mascot

    Joined:
    Aug 21, 2006
    Messages:
    36,719
    Likes Received:
    1,054
    Trophy Points:
    113
    Occupation:
    Nightshift picker
    Location:
    A Swede living in Glasgow, Scotland
    Home Page:
    The '29F had afterburner and had a topspeed of 1.060 km/h and carried 2 AIM-B Sidewinders
     
  12. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
    Staff Member Moderator

    Joined:
    Apr 9, 2005
    Messages:
    23,198
    Likes Received:
    784
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    Aircraft Maintenance Manager/ Flight Instructor
    Location:
    Colorado, USA
    The 29F was still slower than the F-86F and H and the F-86F was also armed with sidewinders. The ROC used them with great effectiveness.
     
  13. Lucky13

    Lucky13 Forum Mascot

    Joined:
    Aug 21, 2006
    Messages:
    36,719
    Likes Received:
    1,054
    Trophy Points:
    113
    Occupation:
    Nightshift picker
    Location:
    A Swede living in Glasgow, Scotland
    Home Page:
    Any idea how much faster she was? Can't have been that much...Mach is what...1.125 km/h or something, above that she's a supersonic fighter..or am I completely off the marker? :lol:
     
  14. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
    Staff Member Moderator

    Joined:
    Apr 9, 2005
    Messages:
    23,198
    Likes Received:
    784
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    Aircraft Maintenance Manager/ Flight Instructor
    Location:
    Colorado, USA
    I show the J-29F at 1060km/h = 658.7 mph. the F-86F was 30 MPH faster, the F-86H almost 40.
     
  15. Lucky13

    Lucky13 Forum Mascot

    Joined:
    Aug 21, 2006
    Messages:
    36,719
    Likes Received:
    1,054
    Trophy Points:
    113
    Occupation:
    Nightshift picker
    Location:
    A Swede living in Glasgow, Scotland
    Home Page:
    Not as much as I thought that it would be.....but in this business it's what can can save your life....it's still 30-40 mph faster.... Would you say that they were otherwise comparable?
     
  16. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
    Staff Member Moderator

    Joined:
    Apr 9, 2005
    Messages:
    23,198
    Likes Received:
    784
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    Aircraft Maintenance Manager/ Flight Instructor
    Location:
    Colorado, USA
    I think they were close. As stated I think the J-29 might of been superior to the early Sabers but that "gap" was quickly closed.
    By the time the J-29F was flying I think the F-100 and Hunter were on their way in. The J-29 was better on unpaved surfaces as seen by its UN service in the Congo.
     
  17. Lucky13

    Lucky13 Forum Mascot

    Joined:
    Aug 21, 2006
    Messages:
    36,719
    Likes Received:
    1,054
    Trophy Points:
    113
    Occupation:
    Nightshift picker
    Location:
    A Swede living in Glasgow, Scotland
    Home Page:
    How do you think that she'd managed if Sweden had sent them to Korea? True, something that was just as important as we designed new machines after the '29....be able to take off from country roads, frozen lakes etc. etc...
     
  18. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
    Staff Member Moderator

    Joined:
    Apr 9, 2005
    Messages:
    23,198
    Likes Received:
    784
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    Aircraft Maintenance Manager/ Flight Instructor
    Location:
    Colorado, USA
    I think it would of had a tough time. The MiG would of still been more maneuverable and was able to accelerate faster (The MiG weighed 5,000 pounds less on take off.), it had a way better climb rate. I show the MiG-15 being about 6 mph faster so I think for the most part speed might be even. I think the J-29 had more effective armament. Although the MiG had heavier cannons, the J-29s Hispano 20mms were perfect for a fighter of that era.
     
  19. Lucky13

    Lucky13 Forum Mascot

    Joined:
    Aug 21, 2006
    Messages:
    36,719
    Likes Received:
    1,054
    Trophy Points:
    113
    Occupation:
    Nightshift picker
    Location:
    A Swede living in Glasgow, Scotland
    Home Page:
    So the Mig-15 would have had an, well, easier time with the '29 then with the F-86 then? Or would it have been more up to the pilots?
     
  20. FLYBOYJ

    FLYBOYJ "THE GREAT GAZOO"
    Staff Member Moderator

    Joined:
    Apr 9, 2005
    Messages:
    23,198
    Likes Received:
    784
    Trophy Points:
    113
    Gender:
    Male
    Occupation:
    Aircraft Maintenance Manager/ Flight Instructor
    Location:
    Colorado, USA
    I think pilot skill would of been able to counter some of the advantages the MiG-15 had. Swede pilots have always been considered "very good" and I would guess had they participated in the air war it would of been "pilot skill" that would of kept them at the advantage, of course this is all hypothetical.
     
Loading...

Share This Page