Sidemounted engine

[Jeff Hughes]

Well, while I agree it's not worth worrying about. I do believe that it wouldn't matter what orientation you mounted a single cylinder engine, there would be some manuevers affected. But, axial rolls in particular wouldn't matter.. Side, inverted, upright, from a mass distribution standpoint, the plane couldn't tell. It would only be some wierd progression type manuever (tumbles, etc).

  ----- Original Message ----- 
  From: Nat Penton 
  To: discussion at nsrca.org 
  Sent: Sunday, January 18, 2004 8:57 AM
  Subject: Re: Sidemounted engine


  The forces causing a non-axial roll occur only during the acceleration phases of the roll ( starting and stopping ). Undesireable forces are generated because masses at different distances from the roll axis experience different rates of acceleration. In practice I don't think we have a problem with the side-mounted engine. Would someone tell me where to find the Mars pictures.        Voodoo
    ----- Original Message ----- 
    From: Jeff Hughes 
    To: discussion at nsrca.org 
    Sent: Sunday, January 18, 2004 11:35 AM
    Subject: Re: Sidemounted engine


    Too really have the minimal, an electric motor and batteries on the Cg running a driveshaft out to the nose would be the best solution. 
      ----- Original Message ----- 
      From: Chuck Wagoner 
      To: discussion at nsrca.org 
      Sent: Saturday, January 17, 2004 11:45 PM
      Subject: Re: Sidemounted engine


      Jeff,
      What about a comparison of a "centered" electric vs. a twin?
      Chuck
        ----- Original Message ----- 
        From: Jeff Hughes 
        To: discussion at nsrca.org 
        Sent: Saturday, January 17, 2004 11:36 PM
        Subject: Re: Sidemounted engine


        Though on a pattern plane, side mounted is just point of view. In knife edge an inverted engine is now side mounted. We're all going to have to go to twins to solve this issue!
          ----- Original Message ----- 
          From: Nat Penton 
          To: discussion at nsrca.org 
          Sent: Friday, January 16, 2004 6:01 PM
          Subject: Sidemounted engine


          Looking at the undesirable forces that would be generated by the assymetric distribution of weight to achieve lateral balance - hard yaw or tight corners would produce no effect because all components would be subject to the same acceleration. There would be an effect during roll, however, because the masses are subjected to different rates of acceleration (polar ) . Our planes damp and reach steady state roll rapidly . These unwanted roll forces would cause a change in pitch ( same as when one aileron has more throw ) during their short life . The magnitude of the pitch change would be hard to quantify ( by me ) .
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20040118/ea68259f/attachment.html