Sideways engine?

[Del K. Rykert]

Some good points.. Not sure I could ever justify the time and expense getting the answer. Time on the sticks through focused practice is still where my time earns biggest result. < VBG >.
    
    del

  ----- Original Message ----- 
  From: Henderson,Eric 
  To: discussion at nsrca.org 
  Sent: Wednesday, January 14, 2004 1:49 PM
  Subject: RE: Sideways engine?


  You should also consider that the engine has its cylinder on the right hand side of the plane. With 3.5 degrees of side thrust the bulk of the crankshaft (The heaviest part) is displaced to the left of center if the spinner is centered. Balance an engine sometime on its side and you will see that the CG of the engine is not on its thrust line.

  Now al all of the above poses a new question, if you care, of how much of a problem we are creating by offsetting and inverted engine 3/4" at the back of the engine--- Hmmmm.

  Also the mass of the mass of the engine has always helped in level flight, when side mounted as it weight is opposite to the counter-rotation caused by the prop.

  It's January, it's cold - even snow, and we are back!

  Regards,

  Eric.

  P.S. The wide body cheek type cowls allow an extremely neat installation. The Rhapsody had a chin cowl with nothing in it. It was just for access.



  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Del K. Rykert
  Sent: Wednesday, January 14, 2004 11:20 AM
  To: discussion at nsrca.org
  Subject: Re: Sideways engine?


  Well I will bite to only suggest that the mean center line of the CG is what would have the most significant reference for snaps and engine mass if located same distance from CG and same off set of midline then how can orientation of a reciprocating moving mass have any differing effect on the stalled snap of the aircraft as we can stop the snap in any attitude we choose to with the same results only difference I've ever noticed is timing.  It may be so subtle that it is hard to detect but I do fly my aircraft very neutral and suspect it would be most noticeable in that trim state. 
      What do others think..  I am only a poor armchair aerodynamics wishful thinker.

            del 
                 NSRCA - 473
    ----- Original Message ----- 
    From: John Ferrell 
    To: discussion at nsrca.org 
    Sent: Tuesday, January 13, 2004 2:19 PM
    Subject: Re: Sideways engine?


    That makes sense to me. I am really surprised that the question did not get a bigger response though. 
    I am way too lazy to conduct any testing on my own. I probably lack the skill necessary to discern the difference any way.

    John Ferrell
    6241 Phillippi Rd
    Julian NC 27283
    Phone: (336)685-9606
    johnferrell at earthlink.net
    http://DixieNC.US
    NSRCA 479 AMA 4190  W8CCW
    "My Competition is Not My Enemy"

      ----- Original Message ----- 
      From: george kennie 
      To: discussion at nsrca.org 
      Sent: Tuesday, January 13, 2004 1:30 PM
      Subject: Re: Sideways engine?


      John, 
      I'm not sure if I'm right on this, but I think that I would like to have all that Mass(bulk & weight of the engine head) located on the centerline of the aircraft.I think that all that off-center mass could produce some unexpected and unwanted effects during snap type maneuvers(and probably others) where radical changes in aircraft speed differentials might magnify the off-center forces in a detrimental way causing exagerated pitch and roll responces making control during certain maneuvers difficult to compensate for. I don't have any empirical data to back any of this up, but it just doesn't feel right to me. 
      Georgie 
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