A good engine to select for my project?

Discussion in 'Firewall Forward / Props / Fuel system' started by geosnooker2000, Jun 23, 2019.

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  1. Jun 23, 2019 #21

    geosnooker2000

    geosnooker2000

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    Seriously? Are questioning the logic of a woman?
    But, no, I share the thought that losing power (fowled plug, blown head gasket, lost compression) in one of 6 cylinders is a heck of a lot less traumatic than one of 4. I would rather have 83% power than 75%.
     
  2. Jun 23, 2019 #22

    wsimpso1

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    I have all of my over 2000 hours on fours. Had a cylinder load up both plugs with oil, ran on three, It still made plenty of power for level flight, fly to an airport, and land. Four is enough if one is not firing.

    Now if you hole a piston or blow a jug, running on n-1 cylinders is going to be a dead engine really soon, whether n is four, six, or even eight.

    I gotta wonder if real world reliability is not worse with more cylinders than with less....

    Billski
     
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  3. Jun 23, 2019 #23

    Hephaestus

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    The jaguar xj12 forums can quickly resolve that question.

    Lmao!
     
  4. Jun 24, 2019 #24

    cdlwingnut

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    First, It is your project and will be your airplane. It is an experimental so you may build it however you want withing some reason. So put the engine you want and like on it. A friend of mine says, with enough persistence, (and i add money) we can make anything work.
     
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  5. Jun 24, 2019 #25

    BBerson

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    I wouldn't loose too much sleep about a blown head gasket on any airplane engine.:rolleyes:
    An old four or six cylinder C-172 is hard to beat for safety.
     
  6. Jun 24, 2019 #26

    TarDevil

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    I'm curious how your wife came to this opinion. Is she mechanically inclined?
    Ok, I missed this when I originally posted.
    So, it really isn't your wife's fears.
     
  7. Jun 24, 2019 #27

    geosnooker2000

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    I take it you're not married...
     
  8. Jun 24, 2019 #28

    TFF

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    After she sees you build this thing, you think she is actually going to get in it? :)
     
  9. Jun 24, 2019 #29

    pictsidhe

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    But you have a higher chance of losing a cylinder if there are more of them. You may, or may not, experience total engine failure as a result.
     
  10. Jun 24, 2019 #30

    TarDevil

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    Oh my goodness, that's funny!

    Quite married, and plenty of airtime with spouse (and many others) in the right seat. Day, night, VFR/IFR, etc. THEY are the ones who gain trust from the left seat.

    I'm not young. Cut my teeth on an O-300 powered airplane. No prejudice here, but I'll cross mountains in the dark with a 4 banging Lyc on the nose.
     
  11. Jun 24, 2019 #31

    Victor Bravo

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    The regular old O-300 is smooth and nearly bulletproof. If you wife's confidence and enjoyment is a high priority, you cannot beat the straight O-300.
     
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  12. Jun 24, 2019 #32

    Toobuilder

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    ...Except with a Lyc 4 banger.
     
  13. Jun 24, 2019 #33

    pictsidhe

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    If it ain't broke, don't fix it!
     
  14. Jun 24, 2019 #34

    Jerry Lytle

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    You need to go with a single bank radial. Choice of 5, 7, 9 cylinders.
     
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  15. Jun 25, 2019 #35

    RSD

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    Maybe go Mazda rotary and explain to wifey about the lack of moving parts...
     
  16. Jun 25, 2019 #36

    geosnooker2000

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    I'm looking for something aircooled.
     
  17. Jun 25, 2019 #37

    Victor Bravo

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    1) Find someone with an older Cessna 172 that has the O-300.
    2) Then find someone who has a newer Cessna 172 with the O-320.
    3) Then take a ride in each one.
    4) Report back to the HBA forum with your findings regarding smoothness and quiet and comfort.

    I'll look forward to hearing the results.
     
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  18. Jun 25, 2019 #38

    Toobuilder

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    There is no doubt the O300 is a great sounding and smooth engine. That said, I'd wager that more 320 Skyhawks make to TBO without major interim surgery than the 300's. Not to say the Contis are bad, but in comparison the Lycs are just bulletproof. And if this is a "reliability" poll, that means something.
     
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  19. Jun 25, 2019 #39

    TarDevil

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    Ayep. Good reason why the Lycs have 200 hr higher TBO.

    I loved the O-300, but I also want the most bang for my bucks.
     
  20. Jun 25, 2019 #40

    geosnooker2000

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    Okay, I really want to do this. This is good, constructive advice. Now... how? How do I find people that have said planes, and B) would be willing to give a stranger a ride in one?
     

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