Firewall Forward / Props / Fuel system

Let's talk engines, engine mounts, props, and plumbing. * Note * For specific questions about 2-Strokes and Auto-conversions, please see those areas.

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  1. TXFlyGuy

    Best Prop Tip Speed?

    TXFlyGuy, Aug 19, 2017 ... 3 4 5
    Replies:
    93
    Views:
    3,793
    lr27
    Jan 25, 2020 at 7:25 AM
  2. blane.c

    850cc water cooled engine 42 kilo's out of the box Chinese of course.

    blane.c, Jan 24, 2020 at 3:16 PM ... 2
    Replies:
    22
    Views:
    278
    blane.c
    Jan 25, 2020 at 4:42 AM
  3. LHH

    Direct Drive Honda/B&S limits

    LHH, Jan 13, 2020 ... 2
    Replies:
    31
    Views:
    995
    Vigilant1
    Jan 25, 2020 at 3:14 AM
  4. Staggermania

    Was wondering about mounting a Lyco/Conti sideways?

    Staggermania, Jan 23, 2020 at 3:41 PM ... 2
    Replies:
    21
    Views:
    365
    D Hillberg
    Jan 24, 2020 at 6:25 PM
  5. HomeBuilt101

    Turbocharged Engine Operating Recommendations

    HomeBuilt101, Jan 24, 2020 at 1:02 AM
    Replies:
    2
    Views:
    111
    TFF
    Jan 24, 2020 at 2:21 AM
  6. Hot Wings

    22 Hp Harbor Freight engine evaluation + other V tiwns

    Hot Wings, Feb 14, 2015 ... 2 3
    Replies:
    52
    Views:
    11,183
    pictsidhe
    Jan 23, 2020 at 10:45 PM
  7. Larrywal

    Competition Aircraft customer service praise!

    Larrywal, Jan 23, 2020 at 8:05 PM
    Replies:
    0
    Views:
    83
    Larrywal
    Jan 23, 2020 at 8:05 PM
  8. MadProfessor8138

    Adjustable pitch prop & Rotax 670.....

    MadProfessor8138, Jan 22, 2020 at 5:04 AM
    Replies:
    0
    Views:
    91
    MadProfessor8138
    Jan 22, 2020 at 5:04 AM
  9. Joe Kidd

    Propeller duplicator plans

    Joe Kidd, Aug 6, 2008 ... 2
    Replies:
    37
    Views:
    15,029
    dog
    Jan 21, 2020 at 5:44 PM
  10. Dana

    Prop pitch, rpm, and performance

    Dana, Nov 13, 2019 ... 3 4 5
    Replies:
    93
    Views:
    3,029
    Pops
    Jan 17, 2020
  11. BoKu

    Modern Aircooled 4-Cylinder Aircraft Engine Using Contemporary Engine Technology

    BoKu, Sep 20, 2017 ... 3 4 5
    Replies:
    81
    Views:
    4,496
    Mad MAC
    Jan 16, 2020
  12. berridos

    Rotax Rick 670 CAD file

    berridos, Dec 17, 2019
    Replies:
    1
    Views:
    206
    Armilite
    Jan 16, 2020
  13. cheapracer

    Rotax 912is for $35,000???

    cheapracer, Dec 30, 2019 ... 2
    Replies:
    37
    Views:
    1,661
    Armilite
    Jan 16, 2020
  14. HomeBuilt101

    Lycoming IO-540 Oil Pressure Question

    HomeBuilt101, Apr 8, 2019 ... 2
    Replies:
    20
    Views:
    1,991
    Paul J
    Jan 9, 2020
  15. berridos

    Turboprop for ultralights

    berridos, Jan 6, 2020
    Replies:
    16
    Views:
    525
    Derswede
    Jan 7, 2020
  16. cheapracer

    Yamaha with Sky Trax PSRU

    cheapracer, Nov 9, 2019
    Replies:
    7
    Views:
    850
    rbarnes
    Jan 7, 2020
  17. Mark Schoening

    motor mount offset for "P" factor

    Mark Schoening, Jan 6, 2020
    Replies:
    13
    Views:
    255
    pwood66889
    Jan 7, 2020
  18. pfarber

    Why are Franklin the only sleeved cylinders?

    pfarber, Dec 20, 2019 ... 2 3
    Replies:
    47
    Views:
    1,711
    Dan Thomas
    Jan 4, 2020
  19. Cy V

    Ural Motorcycle Engines

    Cy V, Jun 2, 2019
    Replies:
    4
    Views:
    808
    Andy Garrett
    Jan 4, 2020
  20. Hephaestus

    Briggs vanguard conversions

    Hephaestus, May 12, 2019 ... 65 66 67
    Replies:
    1,332
    Views:
    52,194
    Hot Wings
    Jan 4, 2020
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