Need some Focus II help

[Grow Pattern]

You're welcome Bill,
                              
BTW - It should say "cowl is pre-positioned" in the note below, not "repositioned" - way to go Bill gates and spell checker :-)
  ----- Original Message ----- 
  From: William C. Harden 
  To: discussion at nsrca.org 
  Sent: Sunday, January 30, 2005 1:00 PM
  Subject: RE: Need some Focus II help


  Thanks Eric, your input is much appreciated.

   

  Bill

   

  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On Behalf Of Grow Pattern
  Sent: Sunday, January 30, 2005 11:41 AM
  To: discussion at nsrca.org
  Subject: Re: Need some Focus II help

   

  Bill,

         There is enough "give" in the assembly to allow you to take a 1/16"  off the rear face or the right-hand side to get a bit more side thrust.

   

  The down thrust is controlled by raising the rear of the structure with a shim where it notches into the former on the u/c support plates. I have done four of these this way. (The only one that failed was the one that hit a tree after the battery terminal came away from the cell!.)

   

  The "box" does not shift position. It is still an "open box" and the sides are stiff enough to stay pointed  forwards. Capping the top and bottom locks it in place.

   

  Lining up the engine is a bunch of fun. The cowl of the FOCUS-2 is repositioned so you have to line up the mount and engine in one go. I'll send you a picture of a tool that I made to do this if it is not already out in MA.

   

  Regards,

  Eric. 

    ----- Original Message ----- 

    From: William C. Harden 

    To: discussion at nsrca.org 

    Sent: Sunday, January 30, 2005 10:35 AM

    Subject: Need some Focus II help

     

    I need some help with the engine box assembly for the Focus II with respect to adding more right engine thrust.

     

    I have read Don Szczur's write up in modifying the engine box to add additional right thrust and some down thrust.  But, he didn't say anything about breaking apart the already assembled (parts glued together) engine box.  

     

    For those of you who have made this modification, did you disassemble the box, make the mods and then reassemble (keeps everything aligned if you do), or did you make the mods with the box assembled and simply install the modified box into the fuselage?  

     

    It seems that the engine box firewall will shift in position inside the fuselage cowling area if the box was not disassembled first and then reassembled such that the desired amount of engine thrust is built in at the firewall.   It is a matter of building in the desired amount of engine thrust at the engine box firewall, or changing the location of the firewall by shifting the box inside the cowling area such that the firewall has the desired amount of engine thrust.

     

    So, what is the recommended procedure??  

     

    Bill
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