REFLECTOR: Engine Build Date for my Velo

[Scott Baker]

Richard,
The XP-400 engine <> MTV-12 propeller will be the first marriage of these two products.  TEC is right in questioning if the MTV-12 is going to work without problems.  Since you are located in Florida, I suggest it would be a good idea to coordinate a vibration analysis with MT-USA (on your aircraft after it is flying).  The MTV-12 with (b) model blades are designed to work with engines without counterbalanced crankshafts.  If your propeller is not have (b) model blades and if the XP-400 does not have a counterweighted crankshaft - there may be issues.  Only a vibration analysis will tell.
SB
  ----- Original Message ----- 
  From: Richard J. Gentil 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Monday, September 11, 2006 5:07 PM
  Subject: Re: REFLECTOR: Engine Build Date for my Velo


  TEC,

  The prop came with the kit when I bought it from the previous owner. (Since I already had it, I figured I would just use it.)

  The XP-400 is a 4 cylinder engine using the the case for the 360 with oversized angle-valve cylinders with bigger valves.

  Richard

  HYTEC45 at aol.com wrote: 
    In a message dated 9/11/2006 12:21:10 P.M. Pacific Standard Time, richard at naples-air-center.com writes:
      I ended up going with the Superior Air Parts XP-400 SRE (Superior Racing 
      Engine) which is their XP-400 with a different cam and high compression 
      cylinders which will develop 250hp (vs the 220hp the standard XP-400 
      generates).

      It should be a good combination MT Prop (MTV-12)

    Is the XP-400 a four cylinder?  All the problems I have had with my mt (took off and junked) were due to (according to mt) my installation of high compression pistons (10-1), and the use of electronic ignition (Klaus) in a four cylinder IO-360C.  They said that they only approve the mt on "certified" 360's  I even purchased the "new and improved" blades which did nothing for keeping the bearings, and seals together after 40hrs of operation.  I am now flying with my Performance fixed pitch, and have a Catto on order, and fly with pease of mind that I will get home and not be grounded somewhere.  

    If mt tells you it will work on a high compression 4 banger, ask them about the guy in California who they told it won't.
    TEC

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