Results 1 to 48 of 48

Thread: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

  1. #1
    Join Date
    Oct 2003
    Location
    Hell
    Posts
    61,402

    Default 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Skip to the three minute mark. . .

    Simpler is better, except when complicated looks really cool.

  2. #2
    Join Date
    Feb 2010
    Location
    Everett, WA
    Posts
    16,519

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Now I know where those smoke trails on aircraft sides come from. Pretty impressive in the dusk!
    Gerard>
    Everett, WA

    "A willing foe, and sea room".

  3. #3
    Join Date
    Dec 2005
    Location
    Seattle. WA
    Posts
    21,743

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Gotta play hell on the paint.
    Among the most enduring things about an old wooden boat is the smell it imparts to your clothing.

  4. #4
    Join Date
    Jul 2002
    Location
    usa
    Posts
    3,085

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    ++1
    We are just a bunch of monkeys--Bernard Moitessier

    http://americansforresponsiblesolutions.org/
    __________________________________________________ ________________________

  5. #5
    Join Date
    Oct 2003
    Location
    Hell
    Posts
    61,402

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    She sounds great here, a 475 mph flyby is not something you see everyday from a prop plane. . .

    Simpler is better, except when complicated looks really cool.

  6. #6
    Join Date
    Aug 1999
    Location
    Woodbridge, Suffolk, UK
    Posts
    21,172

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Why have one Wright Cyclone when you can have four - this takes me back to my childhood, sitting in about that seat...

    IMAGINES VEL NON FUERINT

  7. #7
    Join Date
    Nov 2009
    Location
    Netherlands
    Posts
    1,170

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    WOW!!
    Don't worry I'm happy

    "Every disadvantage, has it's advantages" Johan Cruyff

  8. #8
    Join Date
    Nov 2003
    Location
    Rio de Janeiro, BRAZIL
    Posts
    3,524

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by Andrew Craig-Bennett View Post
    Why have one Wright Cyclone when you can have four - this takes me back to my childhood, sitting in about that seat...

    I was about to post something in the same line of thought..........as kids, we could tell at night /dusk if the plane overhead was a Super Connie, just by looking for the pair of blue trails on either side of the wings.

  9. #9
    Join Date
    Nov 2003
    Location
    Rio de Janeiro, BRAZIL
    Posts
    3,524

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by Lew Barrett View Post
    Gotta play hell on the paint.
    Besides, the enormous risk should aviation petrol leak out of the wing tanks.

    BTW, weren´t any means available at the time to ensure a flameless exhaust ? Or was it part of this particular engine´s sex appeal ?
    Last edited by carioca1232001; 04-08-2013 at 06:01 AM.

  10. #10
    Join Date
    Jan 2001
    Location
    Stuart, Florida
    Posts
    2,659

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Amazing mixture control - anyone know if this thing is carbureted or injected?

  11. #11
    Join Date
    Jan 2001
    Location
    St. Simon\'s Island, GA, USA
    Posts
    4,309

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by Ross M View Post
    Amazing mixture control - anyone know if this thing is carbureted or injected?
    I don't know, maybe carbureted. Back in my earlier days as a passenger, it was interesting to look at the exhaust during night flights. I can't recall if they were Lockheed Constellations or DC-7's, maybe both. Taking off there would be about two feet of yellow flame coming out of all the exhaust stacks. After we had climbed a bit the flame would suddenly shrink back to about a foot of blue flame, or less. Then on approach the exhaust would be two feet of yellow flame again. I guess they liked a rich mixture on landing and take off, and the flight engineer changed the mixture accordingly.

  12. #12
    Join Date
    Aug 1999
    Location
    Woodbridge, Suffolk, UK
    Posts
    21,172

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Carburetted I fancy. Wasn't there an issue with engine fires on the B-36 because the R-4360 engines (different engine but related) were arranged as pushers and the cold airflow over the carburetters resulted in icing of the carburetters and increased richness of mixture until the exhausts caught fire.

    I also think they liked a rich mixture for take off and landing.
    IMAGINES VEL NON FUERINT

  13. #13
    Join Date
    Oct 2003
    Location
    Hell
    Posts
    61,402

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by Andrew Craig-Bennett View Post
    Carburetted I fancy.
    She's fuel injected, water injected and nitrous injected, running through a two speed supercharger. Also has very trick boil off oil coolant system.

    Here's a video of her leaned out burning a piston and ultimately throwing a rod at 508 mph. . .

    Last edited by Paul Pless; 04-09-2013 at 07:40 PM.
    Simpler is better, except when complicated looks really cool.

  14. #14
    Join Date
    Oct 2003
    Location
    Hell
    Posts
    61,402

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    This is what she looked like when she was 'discovered' at a farm in Canada, before being built into a racer.

    Simpler is better, except when complicated looks really cool.

  15. #15
    Join Date
    Jan 2001
    Location
    Stuart, Florida
    Posts
    2,659

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by Paul Pless View Post
    She's fuel injected, water injected and nitrous injected, running through a two speed supercharger. Also has very trick boil off oil coolant system.

    Here's a video of her leaned out burning a piston and ultimately throwing a rod at 508 mph. . .
    Interesting - as is the "as found" picture. It appears that the power recovery turbines normally associated with this engine might never have been part of this installation. For that matter, I thought production Sea Furys had Bristol Centaurust sleeve valve engines.

    Great stuff.

  16. #16
    Join Date
    Mar 2011
    Location
    Middlesex county, MA, USA
    Posts
    572

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    From what I remember...
    The Duplex Cyclones and Twin Wasp Seniors were carbureted engines. The carburetors were squarebore strombergs with needle jets the size of stone arrowheads that had a throughput of over a gallon per minute at slow economy cruise.

    They respectively made 2000 and 1600 hp at low altitude war emergency and 1600 and 1200 full speed, 1200 and 700 continuous at altitude.
    That is with blue code (higher octane rating than pure isooctane) nonalcoholic fuel and exhaust driven air injected turbos.

    They were awesome fire breathing monsters nonetheless.

    Technologically the most advanced piston aviation engines were the immediate prewar and early wartime Junkers Jumo 20X series diesels.
    http://www.enginehistory.org/Diesels/CH4.pdf
    Regardless of how advanced they were I am thankful that the good variants were not mass producible in germany by the time the germans had real desire for a long range bomber.

    I would have either been killed, subject to full biorbital lobotomy, or forced by death threat to use my advanced understanding of physics for evil.

  17. #17
    Join Date
    Oct 2003
    Location
    Hell
    Posts
    61,402

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by Ross M View Post
    I thought production Sea Furys had Bristol Centaurust sleeve valve engines.
    They did. But you don't win Unlimited Gold at Reno these days without a giant twin row Wright or a Rolls V12 turbocharged to hell and beyond. . .
    Last edited by Paul Pless; 04-10-2013 at 05:28 AM.
    Simpler is better, except when complicated looks really cool.

  18. #18
    Join Date
    Aug 1999
    Location
    Woodbridge, Suffolk, UK
    Posts
    21,172

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Ross is correct; the Sea Fury had a Bristol Centaurus sleeve valve 18 cylinder two row radial

    http://en.wikipedia.org/wiki/Bristol_Centaurus

    Dan - I'm going to cautiously suggest that the title of "most technologically advanced piston aero engine" belongs to the Napier Nomad:

    http://en.wikipedia.org/wiki/Napier_Nomad
    IMAGINES VEL NON FUERINT

  19. #19
    Join Date
    Nov 2003
    Location
    Rio de Janeiro, BRAZIL
    Posts
    3,524

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by Andrew Craig-Bennett View Post
    ........Dan - I'm going to cautiously suggest that the title of "most technologically advanced piston aero engine" belongs to the Napier Nomad:

    http://en.wikipedia.org/wiki/Napier_Nomad
    Scanning the reference provided above, it seems that the Napier Nomad was a technological first, integrating a diesel valveless reciprocating engine with a power recovery turbine, in short, a complex bit of machinery, unsurprisingly 'temperamental' at times, and 'somewhat bulky'.

    The Jumos were in comparison 'run of the mill', but were lighter, simpler to maintain and as a result, more reliable.

    I recall reading somewhere that the Napier Nomad made an inroad into the railroad prime-mover sector, but it wasn´t a commercial success either.

  20. #20
    Join Date
    Mar 2011
    Location
    Middlesex county, MA, USA
    Posts
    572

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by carioca1232001 View Post
    I recall reading somewhere that the Napier Nomad made an inroad into the railroad prime-mover sector, but it wasn´t a commercial success either.
    Sort of, British rail ran the Napier Deltic, an advanced derivative of the Napier Nomad, which was a license built jumo 204 clone and not quite as advanced as the 205 series.
    The Deltic D18-25 was 3 Nomads in a triangle on 3 common crankshafts, mechanically blown.
    It made all of 1650 hp at 1500 rpm.
    A naval project spun it much faster and gave it a large powerful efficient axial flow exhaust driven turbocharger.
    It would have made at least 6000 hp but would immediately throw the weakest rod when run past 5600 hp.

  21. #21
    Join Date
    Mar 2011
    Location
    Middlesex county, MA, USA
    Posts
    572

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    As for the Jumo 20X series it was a diamond in the rough.
    Mostly in the pistons, injector system, bearings, and provisions for thermal expansion, and the 11 degree phase angle.
    Read the link and be amazed. http://www.enginehistory.org/Diesels/CH4.pdf
    There is some disagreement as to what the 209 was or was to be, perhaps multiple proposals neared completion.
    The one I think of took the above gems and made a non austerity 207.
    Displacement 29 litres instead of 16.6 of the 205, running at 3000 rpm instead of 2200, with a proper exhaust driven turbosupercharger, the geared blower only functioning during startup, throttle only adjusted by the injectors to ensure proper breathing (diesels do not have a minimum fuel air mix like petrol engines do). HP lubricant pumping performed by a piston pump attached to the underside of each and every piston.
    It would use almost the same block as the 205, with a slight bit more room for the larger diameter cylinders.

    I bet the 209 would make for a great civil aviation engine.
    Pistons already beat jets in everything except speed and altitude.
    The Jumo would solve the altitude and fire safety and thermal efficiency issues and runs on diesel fuel instead of avgas.
    And it needn't be anything fancy. The germans ran the jumos on ship's diesel or J-2 Liquified Coal and had injector pump MTBO's of 800 hours.
    http://www.lowtechmagazine.com/2010/...erage-jet.html

  22. #22
    Join Date
    Aug 1999
    Location
    Woodbridge, Suffolk, UK
    Posts
    21,172

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Sorry folks, confusion has crept in.

    Dan, you are thinking of the Napier Culverin:

    http://en.wikipedia.org/wiki/Napier_Culverin

    The Deltic was three Culverins and was designed for minesweepers; it is still in service with the RN in that capacity, because of its very low magentic signature, but it was also used, sucessfully, in railway engines and in some USN fast patrol boats.

    The Nomad was a different animal altogether .

    And then we have the Commer TS engine truck engine...

    http://en.wikipedia.org/wiki/Commer_TS3
    IMAGINES VEL NON FUERINT

  23. #23
    Join Date
    Mar 2011
    Location
    Middlesex county, MA, USA
    Posts
    572

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Oh yes the culverin, what I what I wanted to say, forgot names.

  24. #24
    Join Date
    Nov 2001
    Location
    Seattle
    Posts
    17,621

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by carioca1232001 View Post
    Besides, the enormous risk should aviation petrol leak out of the wing tanks.

    BTW, weren´t any means available at the time to ensure a flameless exhaust ? Or was it part of this particular engine´s sex appeal ?
    As long as the exhaust ports pointed aft, they provided additional boost. I think night fighters were the only aircraft that tried to hide the flames.

  25. #25
    Join Date
    May 2002
    Location
    North West Arkansas
    Posts
    58,131

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Look at all that pollution!
    The doctrine of nonresistance against arbitrary power, and oppression, is absurd, slavish, and destructive of the good and happiness of mankind.
    Personal failures are too important to be trusted to others.

  26. #26
    Join Date
    Oct 2006
    Location
    Middlin' East
    Posts
    40,384

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Every word you write creates pollution. The electricity to convey your thoughts to and through the interwebs, for example.
    "Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of our people need it sorely on these accounts. Broad, wholesome and charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime" Mark Twain... so... Carpe the living sh!t out of the Diem

    I'd rather look back at my life and say "I can't believe I did that" instead of being there saying "I wish I'd done that"

  27. #27
    Join Date
    May 2002
    Location
    North West Arkansas
    Posts
    58,131

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by The Bigfella View Post
    Every word you write creates pollution. The electricity to convey your thoughts to and through the interwebs, for example.
    how clever of you... but your words are MUCH more polluted than mine... I don't even drink!
    The doctrine of nonresistance against arbitrary power, and oppression, is absurd, slavish, and destructive of the good and happiness of mankind.
    Personal failures are too important to be trusted to others.

  28. #28
    Join Date
    Oct 2006
    Location
    Middlin' East
    Posts
    40,384

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by Phillip Allen View Post
    how clever of you... but your words are MUCH more polluted than mine... I don't even drink!
    Best advertisement I've ever seen to take up drinking.
    "Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of our people need it sorely on these accounts. Broad, wholesome and charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime" Mark Twain... so... Carpe the living sh!t out of the Diem

    I'd rather look back at my life and say "I can't believe I did that" instead of being there saying "I wish I'd done that"

  29. #29
    Join Date
    May 2002
    Location
    North West Arkansas
    Posts
    58,131

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by The Bigfella View Post
    Best advertisement I've ever seen to take up drinking.
    anyone who would enjoy drinking beer would eat a dead cat
    The doctrine of nonresistance against arbitrary power, and oppression, is absurd, slavish, and destructive of the good and happiness of mankind.
    Personal failures are too important to be trusted to others.

  30. #30
    Join Date
    Oct 2006
    Location
    Middlin' East
    Posts
    40,384

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by Phillip Allen View Post
    anyone who would enjoy drinking beer would eat a dead cat
    Why don't you start one of your "kick me" threads, rather than polluting this one?
    "Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of our people need it sorely on these accounts. Broad, wholesome and charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime" Mark Twain... so... Carpe the living sh!t out of the Diem

    I'd rather look back at my life and say "I can't believe I did that" instead of being there saying "I wish I'd done that"

  31. #31
    Join Date
    Jan 2005
    Location
    Deepest Darkest Wales
    Posts
    15,650

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by Andrew Craig-Bennett View Post
    Sorry folks, confusion has crept in.

    ....
    And then we have the Commer TS engine truck engine...

  32. #32
    Join Date
    Oct 2006
    Location
    Middlin' East
    Posts
    40,384

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by P.I. Stazzer-Newt View Post
    Nothing like a bit of vibration, eh?
    "Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of our people need it sorely on these accounts. Broad, wholesome and charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime" Mark Twain... so... Carpe the living sh!t out of the Diem

    I'd rather look back at my life and say "I can't believe I did that" instead of being there saying "I wish I'd done that"

  33. #33
    Join Date
    Jan 2005
    Location
    Deepest Darkest Wales
    Posts
    15,650

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Finally, you consult the Roobarb & Custard school of animation and end up with a working model something like this
    from http://www.sa.hillman.org.au/TS3.htm

  34. #34
    Join Date
    Nov 2001
    Location
    Seattle
    Posts
    17,621

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by P.I. Stazzer-Newt View Post
    What was the advantage over a conventionally opposed engine or a laid down inline engine?

  35. #35
    Join Date
    Jan 2005
    Location
    Deepest Darkest Wales
    Posts
    15,650

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by johnw View Post
    What was the advantage over a conventionally opposed engine or a laid down inline engine?
    The total displacement is only 3.25 litres, but the engine develops 90 B.H.P. Contemporary four stroke engines, for example the Gardner 5LW produced this kind of power from 8 litres.

    The big wins are size, power and fuel efficiency.

  36. #36
    Join Date
    Nov 2001
    Location
    Seattle
    Posts
    17,621

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    So, why didn't it catch on?

  37. #37
    Join Date
    Jan 2001
    Location
    St. Simon\'s Island, GA, USA
    Posts
    4,309

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Sorry to digress from the reciprocating engines, but here goes. Saw and heard ( you would be deaf not to) B58 taking off from Carswell AFB at night with afterburners. They did not breath fire, they spat fire, 50m feet of blue flame out each pod with shock diamonds dancing inside, enough to wake the dead.

  38. #38
    Join Date
    Aug 2012
    Location
    Beaufort, NC
    Posts
    769

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    The JUMO 205 was simpler and more compact than this one. It carried it's cranks at the ends of the cylinders. The glycol was a high prrasure system so no sump was required.

  39. #39
    Join Date
    Aug 2012
    Location
    Beaufort, NC
    Posts
    769

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    The JUMO design office was working on a wide range of projects between the 1930s and 1945. The 205 and the 207 were diesels, the 210 and 211 were robust petrol engines. The 213 was a refined 2000 hp 2000 CID v12. The 109-004 was an axial flow turbojet. All made production. Few offices had such a wide range of projects.

  40. #40
    Join Date
    Apr 2000
    Location
    Barrie, Ontario, Canada
    Posts
    2,541

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    The Stromberg carbs that many of these Allied WWII engines used are what we would call throttle-body-injection. The carb uses a venturi, or multiple venturi tubes as an air sensing device, and to regulate the flow of air into the intake system. Then fuel is metered based on that, and squirted under pressure back into the airstream just downstream from the venturi, and into the supercharger impeller, where it is thoroughly atomized.

    So, it's injected, but not into the cylinders.

    This fuel-air mixture is then compressed by a supercharger, and possibly a turbocharger or a second impeller as well, then cooled if required, then goes into the induction manifolds and into the cylinders.

    Race planes use every advantage they can think of to squeeze 4000 hp out of 2000 hp engines. They are often heavily modified and are expected to have a very short life, sometimes only one race.

    It's very expensive. A newly-overhauled Merlin is going to start at about $120K, before the tweaking begins.

    Dave

  41. #41
    Join Date
    Apr 2008
    Location
    mid-Michigan
    Posts
    1,165

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    I could usually tell a Wright from a Pratt on the ramp. The Wright was the one with the biggest puddle of oil under it.

  42. #42
    Join Date
    Oct 2006
    Location
    Middlin' East
    Posts
    40,384

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    One nice thing about a sand runway.... it soaks up the oil. The radial in this old Antonov is "only" 1000hp... but the puddle of oil is large. Nicely soaked in.

    Last edited by The Bigfella; 04-10-2015 at 12:02 AM.
    "Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of our people need it sorely on these accounts. Broad, wholesome and charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime" Mark Twain... so... Carpe the living sh!t out of the Diem

    I'd rather look back at my life and say "I can't believe I did that" instead of being there saying "I wish I'd done that"

  43. #43
    Join Date
    Feb 2010
    Location
    northern Georgia, USA
    Posts
    5,552

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    A number of times, I saw DC-6 aircraft taxi in and shut off the engines and the oil on the hot engines would burst into flames. The normal procedure was to restart the engine to blow the fire back out. I was told that normal oil usage for a DC-6 was 3 gallons per engine per hour. Much of that leaked out. Each engine had a 32 gallon oil tank.

  44. #44
    Join Date
    Feb 2010
    Location
    northern Georgia, USA
    Posts
    5,552

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    The first time that my father ever flew in an aircraft, it was piloted by Roscoe Turner. Roscoe was a childhood friend of my grandfather.

    Following his first Thompson Trophy victory in 1934, famed racing pilot Roscoe Turner contracted with the Lawrence W. Brown Aircraft Company to build a new racing aircraft. Designed by Turner and engineered by University of Minnesota professor Howard Barlow, the Turner racer was completed in mid-1936. Following flight tests, Matty Laird extensively redesigned the aircraft and added a larger wing and flaps. Known as the Laird Turner LTR-14 and later the Turner RT-14, the modified racer placed third in the 1937 Thompson Trophy event at the National Air Races and won the 1938 and 1939 contests. With this aircraft, Turner became the only three-time winner of the Thompson Trophy. In 1939 the aircraft was sponsored by Champion Spark Plugs and therefore carried the name "Miss Champion" on its fuselage.

  45. #45
    Join Date
    Apr 2008
    Location
    mid-Michigan
    Posts
    1,165

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    The overhaul manuals for some radials call out how much oil the engine is SUPPOSED to use per hour ! Seems to have been a normal thing.

  46. #46

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Oil useage was due to bunch of issues...... variations in temperature due to altitude, and a certain amount of blowby built in the engine.

    These big old aircraft engines are stone cold cool. They required a whole lot of maintenance tho.
    Wooden boats are like shingles, recurring, and often painful.

  47. #47
    Join Date
    Sep 2009
    Posts
    15,417

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Quote Originally Posted by pila View Post
    The overhaul manuals for some radials call out how much oil the engine is SUPPOSED to use per hour ! Seems to have been a normal thing.
    was nothing to put in more than 5 gal after a flight in the r2800s

  48. #48
    Join Date
    Aug 2012
    Location
    Beaufort, NC
    Posts
    769

    Default Re: 4000+ HP Wright R-3350 Duplex-Cyclone breathing fire

    Alot of radial designs swelled tight as they warmed up. Many had exposed rocker arms with oil pouring out the valve guides. The engineering that went into cooling Double Wasps and Four row Majors aproached high art. The labor and money that went into these machines was stupendous times four plus spares for a Superfortress or a Marine Corsair squadron. According to a MAG 1 squadron leader that I talked shop with 15 years ago, his machanics got 3000 hp out of their R2800s for long range escort missions over the Home Islands. Up to 14 hours with 3000 lbs of fuel underwing and full internal fuel. He said more than once his engine quit when his tail wheel touched the PSP. Vapors only in the tank.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •